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v 2. 2 1 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm features ? 4 ,000 counts lcd display with 21 analog bar - graph ? l qfp 128l package ? 3v dc power supply ? slow adc conversion rate : 3 times/s ? bar - graph adc conversion rate : 3 0 times/s ? full automatic measurement voltage measurement : 4 00.0mv , 4.000v ? 1000v current measurement : a/ma/a frequency with voltage or current : resistance measurement : 4 0.00 ? 4 0.00m capacitance measurement : 4 .000nf ? 4 0.00mf ( taiwan patent no.: 323347, 453443 ) capacitance measurement for clampmeter mode : 4 .000nf ? 4 0.00mf s mart auto check for r / s / d / c mode resistance : 0 . 0 ? 4 . 000m (buz. on when r < 30 ) capacitance : 0 . 5 00nf ? 4 0 0 . 0 u f ( taiwan patent no.: 326361) not contact ac electric field detection frequency counter : 400 .0hz ? 40 .00mhz duty cycle measurement : 5% ? 95% (< 10khz) ? diode measurement & continuity check ? hazardous ac/dc voltage (hv) indication ? 4 adp modes with external reference voltage and independent ?adp? user - defined segment on lcd ? temperature mode with internal scale translation circuit from 0 c to 0 f ? k - type thermoc ouple reference table compensation ( - 200 o c ~ 1350 o c range) ? push functions : va hz function max/min function relative function zero function: dca clampmeter only back light function key function data hold and delayed - hold function range change function sem i - auto calibration operation ( taiwan patent no.: 367334 ) ? low pass filter mode for aca/acv measurement ( taiwan patent no.: 3 62409 ) ? band - gap reference voltage output ? voltage overflow selection ( dc / ac : 1010v, dc / ac : 610v ) ? serial data output ( rs232 for mat ) ? lcd segment check when power on ? auto power off ( 30min / 15min ) ? sleep state indicative signal output ? re - power on ? on - chip buzzer driver ? low battery detection ? description ES233 is an integrated analog - to - digital converter with 4,000- count lcd with bar - graph display, automatic range selection, and 3v dc power supply. automatic range selection is provided for acv/dcv measurement, resistance measurement, current measurement, capacitance measurement, and frequency counter. expensive and bulky mechanical ra nge switches are not required. other features include relative value display, offset rem oving feature for dca clam p mode , data holding, maximum and minimum value holding, duty cycle measurement, diode measurement, temperature measurement, continuity checki ng, low battery detection, auto power off, re - power on, backlight driver, buzzer driver and rs232 data output.
v 2. 2 2 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm application ? digital multimeter ? clamp meter pin assignment ? 128l l qfp package nc 127 cln 10 nc 128 ivs 1 a dp 2 chp 5 chn 6 cih 7 bufh 8 cil 12 caz h 9 clp 11 caz l 13 bufl 14 raz 15 v rh 16 vr_clamp 18 o hm c4 20 o hm c3 21 o hm c2 22 o hm c1 23 o vsg 24 o r1 25 v r4 27 v r3 28 v r2 29 acvl 30 v r5 26 acvh 31 a di 32 a do 33 test5 34 sgn d 35 v r1 36 lpfout 38 mvi n 37 lpc1 39 lpc2 40 lpc3 41 can 42 cap 43 r1 0k 44 r1k 45 o vx 46 o vh 47 ovh1 48 sleep 49 freq 50 calenp 51 sda p 52 bzout 54 bkout 55 alarm1 56 alarm 57 bp4 58 bp3 59 bp2 60 bp1 61 se g2 9 62 se g2 8 63 seg2 6 65 seg2 5 66 seg2 4 67 seg2 3 68 seg2 2 69 seg2 1 70 seg2 0 71 seg1 9 72 seg1 8 73 seg1 7 74 seg1 6 75 seg1 5 76 seg1 4 77 seg1 3 78 seg1 2 79 seg1 1 80 seg1 0 81 seg0 9 82 seg0 8 83 seg0 7 84 seg0 6 85 seg0 5 86 seg0 4 87 seg0 3 88 seg0 2 89 seg0 1 90 cese l 91 sel 2 92 sel 1 93 d is 94 tsel 95 v st 96 aposel 97 vbar 98 rs232 99 o sc2 1 00 o sc1 1 01 t em pin 3 clampi n 4 vr_adp 19 rsout 1 02 nc 103 hz 104 m mx 105 rel 106 bkl i t 107 key 108 h ol d 109 range 110 fc5 111 fc4 112 fc3 113 fc2 114 fc1 115 sl acd c 116 cn 117 cp 118 lbat9 119 v- 120 v- 121 v+ 122 v+ 123 dgnd 124 agnd 125 agnd 126 d aco 17 sclp 53 se g2 7 64 ES233 cyrustek. com.tw
v 2. 2 3 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm pin description pin no symbol type descript ion 1 ivs i m easurement input in ua/ma current mode. 2 adp i measurement input in adp mode. 3 tempin i measurement input in temperature mode. 4 clampin i current measurement input in clamp mode. 5 chp i / o positive connection for reference capacitor of high - speed a/d. 6 chn i / o negative connection for reference capacitor of high - speed a/d. 7 cih o high - speed integrator output. connect to integra te capacitor. 8 bufh o high - speed buffer output pin. connect to integra te resistor. 9 cazh o high - spee d auto - zero capacitor connection. 10 cln i / o nega tive connection for reference capacitor of high - resolution a/d. 11 clp i / o posi tive connection for reference capacitor of high - resolution a/d. 12 cil o high - resolution integrator output. connect to i ntegra te capacitor. ( metalized polypropylene film capacitor type is recommended) 13 cazl o high - resolution auto - zero capacitor connection. 14 bufl o high - resolution b uffer output pin. connect to integra te resistor 15 raz o buffer output pin in az and zi phase. 16 vrh o output of band - gap voltage reference. typically ? 1.23v . 17 daco o output of band - gap voltage reference. typically ? 400 m v. 18 vr_clamp i reference input voltage connection. typically ? 400 mv. 19 vr_adp i reference input voltage connec tion. typically ? 400mv. 20 ohmc4 o filter capacitor connection for resistance mode. 21 ohmc3 o filter capacitor connection for resistance mode. 22 ohmc2 o filter capacitor connection for resistance mode. 23 ohmc1 o filter capacitor connection for resis tance mode. 24 ovsg o sense low voltage for resistance/voltage measurement 25 or1 o reference resistor connection for 40.00/ 4 0 0.0 range 26 vr5 o voltage measurement 10000 attenuator(1000v) 27 vr4 o voltage measurement 1000 attenuator( 40 0.0v) 28 vr3 o voltage measurement 100 attenuator( 40 .00v) 29 vr2 o voltage measurement 10 attenuator( 4.0 00v) 30 acvl i rectified signal low input in acv/aca mode. connect to negative output of external ac to dc converter. 31 acvh i rectified signal high input in acv/aca mode. connect to positive output of external ac to dc converter. 32 adi i negative input of internal ac to dc op amp. 33 ado o output of internal ac to dc op amp. 34 test5 o buffer output of ovsg. 35 sgnd i signal ground input . 36 vr1 i measurement input. connect to a precised 10m resistor.
v 2. 2 4 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm pin description ( c ontinued ) pin no symbol type description 37 mvin i measurement input in 400.0 mv mode. 38 lpfout o capacitor c1 connection for internal low - pass filter. 39 lpc1 o capacitor c1 connection for internal low - pass filter. 40 lpc2 o capacitor c2 connection for internal low - pass filter. 41 lpc3 o capacitor c3 connection for internal low - pass filter. 42 can i / o negative auto - zero capacitor connection for capacitor measurement. 43 cap i / o positive auto - zero capacitor co nnection for capacitor measurement. 44 r10k o connect to a precise d 10 k resister for capacitor measurement. 45 r1k o connect to a precise d 1k resister for capacitor measurement. 46 ovx i sense input for resistance / capacitance measurement. 47 ovh o output connection for resistance measurement. 48 ovh1 o output connect ion for resistance measurement. (optional) 49 sleep o sleep mode indicator, asserts low in sleep mode. 50 freq i frequency counter input, offset v - /2 internally by the chip. 51 calenp i pulled to v - to enable the calibration scheme . 52 sdap i / o input / output from to eeprom 24 l c02 data. 53 sclp o output to eeprom 24 l c02 clock. 54 bzout o outputs a 2khz audio frequency signal for driving piezoelectric buzzer 55 bkout o if bklit function is enabled, this pin will change from v - to v+ . o nce press bkli t pin again within 300 sec, this pin will change back to v - . 56 alarm1 o short circuit indication output . 57 alarm o hv signal detection in voltage mode and ef mode indication output . 58 bp4 o lcd backplane 4. 59 bp3 o lcd backplane 3. 60 bp2 o lcd ba ckplane 2. 61 bp1 o lcd backplane 1. 62 - 90 seg29 - seg01 o lcd segment line 01 ? 29. 91 cesel * i voltage ol selection feature control pin. (10 1 0v/6 1 0v) 92 sel2 * i diode ol level and hv indication selection pin. 93 sel1 * i s et current mode ol level s election pin. (dmm or clamp mode) 94 dis * i control warning buzzer output at lpf and hv mode 95 tsel * i temperature mode controls the automatic mode or manual mode and enable or disable input terminal symbol displayed on the lcd panel selection pin. 96 vst * i e nable the auto range voltage mode to start from 4 00.0v or disable adp input terminal symbol displayed on the lcd panel selection pin. 97 aposel i idle time selection for auto power off feature. 98 vbar i in a or ma modes, it is used to control t he ?? or ?m? sign. set to v - to enable the c lamp current mode.
v 2. 2 5 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm pin description ( c ontinued ) pin no symbol type description 99 rs232 i assert low (v - ) to make serial data output function not available . 100 osc2 o crystal oscillator output connection . 101 osc1 i crystal oscillator input connection . 102 rsout o serial data output. 103 nc - n ot connected. 104 hz i pulse to v - to enable vahz mode or duty cycle measurement in f req. mode . 105 mmx i pulse to v - to enable max/min function. 106 rel i puls e to v - to enable /disable relative function or zero function. pulse to v - larger than one second to enable /disable rs232 output. when rs232 output is enabled, t h e apo will be disable d automatically. 107 bklit i back light function. pulse low to set bkout pin output. 108 key i pulse to v - to change mode. 109 hold i pulse to v - to enable hold function. pulse to v - larger than one second to enable delayed hold function. 110 range i pulse to v - to enable manual mode and manual range selection. 111 fc5 i sw itch 5 for function selection. 112 fc4 i switch 4 for function selection. 113 fc3 i switch 3 for function selection. 114 fc2 i switch 2 for function selection. 115 fc1 i switch 1 for function selection. 116 slacdc i select initial dc/ac state. 117 cn o negative capacitor connection for on - chip dc - dc converter. 118 cp o positive capacitor connection for on - chip dc - dc converter. 119 l b at 9 i multi - level low battery configuration input. simple external resistor divider is required. 120 v - p negative su pply voltage. 121 v - p negative supply voltage. 122 v+ o output of on - chip dc - dc converter. 123 v+ o output of on - chip dc - dc converter. 124 dgnd p / g digital ground. 125 agnd p / g analog ground. 126 agnd p / g analog ground. 127 nc - n ot connected . 128 nc - n ot connected. note: p in91 - p in96 are 4 - level logic definition: (v+/dgnd/floating/v - ) , see section operation mode
v 2. 2 6 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm absolute maximum ratings characteristic rating supply voltage (v - to agnd) - 4v analog input voltage v - - 0.6 to v+ +0.6 v+ v+ (agnd/dgnd+0.5v) agnd/dgnd agnd/dgnd (v - - 0.5v) digital input v - - 0.6 to dgnd +0.6 power dissipation. flat package 500mw operating temperature - 2 0 to 70 storage temperature - 4 5 to 125 electrical characteristics parameter symbol test conditio n min. typ. max units power supply v - 2.4 - 3. 0 3. 3 v operating supply current in dcv mode i dd normal operation ? 1.8 2.5 ma i ss in sleep mode ? 5 10 a voltage roll - over error rev 10m input resistor ? ? 0.1 %f.s 1 voltage nonlinearity nlv best cas e straight line cil=mpr capacitor ? ? 0.1 %f.s 1 zero input reading 10m input resistor - 000 000 +000 counts band - gap reference voltage v ref 100k resistor between vrh and agnd - 1.3 0 - 1.2 3 - 1.1 6 v open circuit voltage for 400 measurement v - =3v ? - 3. 0 ? v open circuit voltage for other measurement - 1.19 - 1.08 - 0.97 v peak to peak backplane voltage - 3.5v v - 2.2v 3.0 3.1 3.2 v internal pull - high to 0v current between v - pin and hold, range, key, fc1 - fc5, bklit, ? 1.2 ? a between v - pin and rs232 ? 11 ? a ac frequency response at 4.0 00v range 1% ? 40- 400 ? hz 5% ? 400- 2000 ? 3db frequency for lpf mode f 3db = 1khz ? 1k ? khz f 3db = full 100k ? ? khz multi - level low battery detector v t1 l b at 9 v s . v - 2.15 v v t2 1 .82 reference voltage temperature coefficient tc rf - 2 0 v 2. 2 7 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm function description 1. operating modes 1.1. semi - auto calibration scheme ES233 includes dmm & c lamp - on meter features in single chip. dmm manufacturers need the calibration process in production. the traditional solution needs the variable resistors for calibration by manual adjustment. es23 3 provide another calibration scheme and the most variable resistors could be ignored. when ES233 is at off - state, pull calenp (pin 51 ) to v - to active the calibration scheme after re - power on. a digital controlled voltage output will be active from daco. when semi - auto calibration scheme is active, use hold (or bklit ) key to decrease voltage and use range (or mmx) key to increase the voltage. decrease the reference voltage means the counts on display will be increased. increase the reference voltage means the counts on display will be decreased. the adjustment step is approximate one count. if coarse adjustment is required, push hold (or bklit ) and range (or mmx) larger than one second to speed up to approximate 1 0 counts per second. after calibration proce ss is finished, push hold (or bklit ) and range (or mmx) less than 1sec. simultaneously to save the digital control code to external eeprom (24 l c02). the semi - auto calibration scheme supports the following nine measurement modes. when calenp pin is active , set the proper function switches or push key to choose the target measurement mode. when mode is selected, the lcd segment of unit at related measurement will be blinking. mode default range for cal remark voltage measurement 4 .000v (dc/ac separated) ac curacy of other ranges is guaranteed by external resistor. mv voltage measurement 4 00.0mv (dc/ac separated) dc current measurement for m ultimeter (ua/ma) 4 00.0 a or 4 000 a ( 2 modes choose one for calibration ) auto 2 ranges choose one, p rop osed to use a large range to calibration . a c current measurement for m ultimeter (ua/ma) 4 00.0 a or 4 000 a ( 2 modes choose one for calibration ) auto 2 range s separate d for calibration is necessary . dc current measurement for m ultimeter (a) 4 a or 20a auto 2 ranges choose one, p roposed to use a large range to calibration . a c current measurement for m ultimeter (a) 4a or 20a auto 2 range s individual for calibration is necessary. dc current measurement for clampmeter 4 00.0a or 4 000a ( 6 modes choose one for calibration ) auto 2 ranges choose one, p roposed to use a large range to calibration . a c current measurement for clampmeter 4 00.0a or 4 000a ( 6 modes choose one for calibration ) auto 2 range s separa te d for calibration is necessary . capacitor measurement 4 0.00nf temperature measurement 4 00.0 lower range in auto temperature measurement. adp measurement 4 000 / 4 00.0 / 4 0.00 / 4 .000 4 range s separate d for calibration . after calibration procedure is finished, set ES233 to off - state and set calenp (pin51) to dgnd or kept floating to return to normal mode operation after re - power on.
v 2. 2 8 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 1.2. voltage measurement a re - configurable voltage divider automatically provides a suitable range in voltage measurement m ode. 400 .0mv range is independent and manual mode. it takes input signal from mvin pin . the following table summarizes the full - scale ranges in each configuration. configuration full scale range divider ratio resister connection input pin vr1 4 0 0.0mv 1 - mvin v.s. sgnd vr2 4 . 0 00v 1/10 vr2 (1.111m) vr1 v.s. sgnd vr3 4 0 .00v 1/100 vr3 (101k) vr1 v.s. sgnd vr4 4 0 0.0v 1/1000 vr4 (10k) vr1 v.s. sgnd vr5 1000v 1/10000 vr5 (1k) vr1 v.s. sgnd the vst pin is used to control the voltage start range from 4. 000v or 4 00.0v , refer to the table. vst v+ dgnd f loating v - initial state 4 00.0v 4 .000v 4 00.0v 4 .000v the ES233 provide two types of the hazardous live voltage warning by different condition. sel2 v+ dgnd f loating v - dcv 35v 70v acv 16v 33v when the voltage measured exceeds the level defined, t he buzzer generates 2khz beep and alarm (pin 57 ) drive high output (v+ level) periodically. it can remind the user to notice the hazardous voltage. the buzzer sound warning could be cancelled by dis (pin94). dis v+ dgnd f loating v - buzzer disable enable
v 2. 2 9 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 1.2.1. ol selection ES233 has a voltage ol selection feature archived by configuring the pin cesel . in automatic voltage mode, ES233 will show ol when the voltage is exceed the overflow level. if cesel is connected to v+ , ES233 will have a 1010v overflow level in voltage mode. if cesel connected to dgnd , the overflow level will be set to 6 10v in dcv and acv mode. the configuration of cesel is listed below. for acv/dcv voltage mode s : cesel v+ dgnd ol level 101 0v 6 1 0v note: v - /floating level is not available. 1.3. low p ass f ilter (lpf) m ode f or aca/acv m ode ES233 provides a 3 rd order low - pass filter to reduce the influence of high frequency noise. this lpf feature is available in acv or aca modes. set fc5 to low in these modes, the key button is used to activate the lpf feature. press key button for less than 1 second to select the 3db bandwidth of lpf sequentially ( full / 1khz ) and the relative lcd symbol on lcd panel will be active also. the dis (pin94) could enable/disable the low pass filter feature available. dis v+ dgnd f loating v - lpf disable enable disable enable
v 2. 2 10 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 1.4. current m easurement f or m ulti - meter ES233 has 3 automatic current measurement modes for multimeter. th e following table summarizes the full - scale range of each mode. when ES233 operates in the current measurement modes for multi - meter, i t takes high input from pin ivs , low input from pin sgnd and reference voltage from calibration scheme . mode fc1~4 1 vbar full scale input terminal automatic1 1,1,0,1 1 4 0 0.0a / 4 0 00a ivs v.s. sgnd automatic2 1,1,1,1 1 4 0 .00ma / 4 0 0.0ma ivs v.s. sgnd automatic 3 0,0,0,0 1 4 . 0 00a /10.00a 2 ivs v.s. sgnd note: 1. connect vbar to v - will disable the ? 2 ? / ?m 2 ? symbol on lcd p anel . 2. connect sel 1 to v+ (or f loated ) or v - (or dgnd) will set maximum readings of input for automatic3 mode . sel 1 v+ dgnd f loating v - ol level 10.00a 20.00a 10.00a 20.00a 1.5. current m easurement f or c lamp - meter ES233 has 2 automatic and 4 manual c urrent measurement modes for clampmeter. the following table summarizes the full - scale range of each mode. when ES233 operate in the automatic mode s and the manual mode1~4 , it takes high input from clampin pin , low input from sgnd and reference voltage fro m vr _clamp . mode fc1~4 1 vbar full scale input terminal automatic1 1,1,0,1 0 4 0 0.0a / 4 0 00a 2 clampin v.s. sgnd automatic2 1,1,1,1 0 4 0 .00a / 4 0 0.0a clampin v.s. sgnd manual1 1,1,0,0 x 4 . 0 00a clamp in v.s. sgnd manual2 1,0,0,0 x 4 0 .00a clamp in v.s. sgnd manual3 1,0,1,0 x 4 0 0.0a clamp in v.s. sgnd manual4 1,0,0,1 x 1000a or 2000 a 2 clamp in v.s. sgnd note: 1. connect vbar to v - will disable the ? 2 ? / ?m 2 ? symbol on lcd panel . 2. connect sel 1 to dgnd or v - will set maximum of input for automatic1 & manual4 mode s . 3. in dc current modes for clamp - meter, ES233 provides zero f unction for offset removing. sel 1 v+ dgnd f loating v - ol level 1000a 2000a
v 2. 2 11 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 1.6. scan rsdc measurement ES233 provide the smart auto check mode for the dut type. it could scan the four types of device r esistor / s horted / d iode / c apacitor. push key to change to individual function is available. it could increase the measurement ranges. the following table summarizes the detective range for the smart scan rsdc mode . mode fc1~ 4 slacdc availa ble scanning range scan rsdc 1,1,1,0 0 r: ~ 4m ? ( parasitic capacitance < 100pf) s: < 30 ? buzzer on d: forward/reverse diode direction c: ~ 400uf (minimum 500pf) 1.7. resistance measurement a re - configurable divider automatically provides a suitable full - scale range in resistance measurement mode. th e following table summarizes the f ull - s cale ranges and the reference r esistors in each configuration. configuration full scale range relative resistor equivalent value or 0 40.00 ? or1 100 or1 4 0 0.0 or1 100 or2 4 . 0 00k vr5 1k or3 4 0 .00k vr4 || vr1 10k or4 4 0 0.0k vr3 || vr1 100k or5 4 . 0 00m vr2 || vr1 1m or6 4 0 .00m vr1 10m
v 2. 2 12 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 1.8. capacitance measurement the following table summarizes the eight ranges of capacitance measurement mode. configuration 1 full scale range relative resistor mea surement period c1 3 4. 0 00nf ratio to c2 0.3 6 sec c2 2 4 0 .00nf cal 0.3 6 sec c3 4 0 0.0nf ratio to c2 1.15 sec c4 4. 0 00uf ratio to c2 1.15 sec c5 4 0 .00uf r 1 0 k 0. 33 sec c6 4 0 0.0uf r 1 0 k 2.2 sec (max) c7 4 . 0 00mf r1k 0.89 sec (max) c8 4 0 .00mf r1k 8.8 sec (max ) note: 1. in order to obtain an accurate reading, a capacitor must be discharged before measurement begins. the chip has a built - in discharge mode to automatically discharge the capacitor. in discharge mode, the main - display shows dis.c . discharging through the chip is quite slow. we recommend users to discharge the capacitor with some other apparatus. 2. the c2 range is calibrated in calibration scheme. 3. the c1 range residual offset could be compensated by the small capacitors near to ovh pin. 1.9. continuity c heck continuity check shares the same configuration with 4 00.0 manual resistance measurement mode and has buzzer output to indicate continuity. the buzzer generates 2khz beep and alarm1 (pin 56 ) drive high output (v+ level) whenever the reading is less than 30. the ES233 built in a high speed short detection ci rcuit and the detection could be less than 10ms .
v 2. 2 13 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 1.10. diode measurement diode measurement mode shares the same configuration with 4 .000v manual voltage measurement mode and has buzzer output to indicate continuity. the buzzer generates a 2khz so und and alarm1 (pin 56 ) drive high output (v+ level) whenever the reading is less than 30mv. if the test circuit is open or the voltage drop between the two ports of the diode under test is larger than 2v or 2.5v (depends on sel2 pin level) , the lcd panel will show ?ol?. sel 2 v+ dgnd f loating v - ol 2.500v 2.000v 2.500v 2.000v the ES233 also support a led forward voltage measurement mode. it is necessary to use external source to achieve the measurement. the following table & diagram summarizes the d iode & led measurement mode. mode slacdc fc1~4 sel2 full scale input terminal led 1 0,0,1,0 v + o r f l o at 3.500v vr1 v.s. sgnd l ed p tc l ed m od e r 1.111m 10m ovh v+ ovsg v es235 / 236 / 238 / 239 p tc external source diode mode inte rnal source
v 2. 2 14 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 1.11. frequency c ounter the time base of the frequency counter is derived from an external crystal oscillator by t counter = 4,000,000 f osc w here f osc is the frequency of the crystal oscillator. thus, the counter has a 1 - second time base when a 4mhz oscillator is used. the frequency counter can select the proper range automatically or manually. auto - range operation extends o ver six decades, from 400. 0hz to 40 .00mhz. the following table summarizes the full - scale range of the frequency counter. range full scale fr 1 4 0 0.0hz fr 2 4 . 0 00khz fr 3 4 0 .00khz fr 4 4 0 0.0khz fr 5 4 . 0 00mhz fr 6 4 0 .00mhz *if input frequency is less than 1 .0hz, ES233 will show 0 . 0hz 1.12. duty cycle m easurement when frequency mode is selected, push h z key to enter duty cycle measurement . the duty cycle mode range is within 5 .0% to 95 .0% (< 10khz@3vpp). the minimum resolution is 0.1%. if the source frequency duty cycle is smaller than 5.0 %, the ul will be shown on the lcd display. if the duty cycle is larger than 9 5.0 %, the ol will be shown on the lcd. when the frequency is zero, the duty cycle display will be 0.0% or ? ul ? shown.
v 2. 2 15 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 1.13. electrical field detection mode ES233 supports a non - contact ac voltage measurement, which is called electric field measurement also. the adc input is configured from adp pin vs. sgnd . when no or less electric field is detected, the lcd display shows ?ef?. if the electri c field is detected, the strength will be showed on the lcd display by ? - ? not digits type. level 1(equivalent to 12.5% full scale of adc) is ? - ? and the level 4(equivalent to 100% full scale of adc) is ? ---- ?. additional beeper ( buzout pin) and led alarm ( alarm pin) will be output from ES233 . the frequency of buzzer and led alarm depends on the strength of electric field also. the faster beeper means the stronger electric field (ac voltage) is sensed. mode fc1~ 4 slacdc full scale input terminal ef 1,1,1, 0 1 - adp v.s. sgnd 1.14. temperature m easurement mode temperature measurement mode takes input signal from tempin pin. the ES233 ha s oc to of scale translation circuit and standard k - type thermocouple reference table is built - in . external cold - juncti on compensation circuit is still necessary. in temperature measurement mode , there is automatic mode and manual mode . the tsel pin (pin95) is used to control the automatic mode (0.1 o c/1 o c resolution) or manual mode (0.1 o c resolution) selection. it also cou ld enable or disable display of input terminal symbol on the lcd panel (seg28) . manual range auto range oc range - 200.0 oc ~ 4 00.0 oc - 200 oc ~ 1350 oc - 200.0 oc ~ 4 00.0 oc / 4 00 oc ~ 13 50 oc of range - 328.0 of ~ 752.0 of - 328 of ~ 2462 of - 328.0 of ~ 752.0 of / 752 of ~ 2462 of t he following table summarizes the operation of tsel pin: tsel v+ dgnd f loating v - range select manual range auto range manual range auto range lcd seg28 display symbol on display symbol on display symbol off display symb ol off adp 100 m ef test circuit efin+ sgnd agnd efin - 100k v radp - 400mv
v 2. 2 16 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm temperature mode circuit example: 1.15. adp ES233 provides 4 manual range adp measurement modes for user define . the adp pin is auxiliary input terminal for adc of ES233 . the full scale for adp mode is 400.0mv. if fc5=0, the minus sign will not be show n on lcd segment. mode fc1~ 4 slacdc full scale input terminal a dp0 0,0,1,1 1 4000 adp v.s. sgnd adp1 0,0,0,1 1 400.0 adp v.s. sgnd adp2 0,1,1,1 1 40.00 adp v.s. sgnd adp3 0,0,1,0 1 1 4.000 adp v.s. sgnd note: 1. if sel2 pin is set to v+ or kept floating, the adp3 mode will be disable d and change to led mode. the vst pin (pin96) could be used to enable or disable input terminal symbol displayed on lcd panel for adp mode . vst v+ dgnd f loating v - lcd seg28 display symbol on display symbol off
v 2. 2 17 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 1.16. auto p ower o ff a nd i dle t ime s election ES233 has a default auto power off function. if the meter is idle for more than the given idle time duration , the chip automatically turns the power off. the idle time to trigger the auto power off function is determined by aposel pin. if aposel is connected to v - , the i dle t ime will be set to 30 minutes. if pin aposel is floating, the idle time will be set to 15 minutes. when apo is occurred , the state of the meter is reserved . the apo symbol on the lcd panel indicates whet her the auto power off is enabled or not. in some cases, user might want to disable auto power off. there are two ways to disable this feature as following: 1. power on the meter when any of the push functions, except for hold, is pressed down. 2. in addition, w hen rs232 output is active, the auto power off function is also disabled automa t ically . note: powering on the meter while pressing hold and lasts 2 seconds turns on all lcd segments until hold is pressed again. 1.17. sleep the meter enters sleep mode after aut o power off. the sleep pin asserts low (v - ) in the sleep mode, and asserts high (v+, not 0v) after re - power on. 1.18. re - p ower o n after auto power - off, pushing any of the push function or changing the rotary mode can turn on the meter again. if the meter is re - powered on by changing the rotary mode, the saved state is cleared. if the meter is re - powered on by push functions, the chip restores the saved state and enters hold mode. the lcd displays the saved value. 1.19. hazardous voltage indication the ES233 could provide the ac/dc hazardous voltage indication for voltage/resistor/capacitor/diode modes. of course, the indication could support lcd symbol /led /buzzer driving simultaneously . especially ES233 could detect the ac voltage in dcv mode and detects t he dc voltage in acv mode. it means if not proper ac or dc voltage signal exists on the dut when dcv or acv measurement mode is set, the hv indication will be active.
v 2. 2 18 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm hv indication criterion function / range dc voltage (typ.) ac voltage (typ.) ac mv > + 3v ol ac 4 v > + 20v ol ac 4 0v ? 1000v > + 100v depends on sel2 dc mv ol > 3vrms (40 - 1khz) dc 4 v ol > 20vrms (40 - 1khz) dc 4 0v - 1000v depends on sel2 > 90vrms (40 - 1khz) res/cap/diode modes > + 10v > 10vrms (40 - 1khz) note: if ac+dc signal is applied, th e voltage criterion will be changed. 1.20. multi - level l ow b attery v oltage d etection ES233 provides a voltage detection input (pin 121: lbat9 ) for multi - level low battery application. there are two internal voltage reference vt1 & vt2 for comparing with lbat9 . if lbat9 is larger than vt1, the lcd segment of slb 1 ? slb 3 will active always. this status implies full battery. when lbat9 is less than vt1 but larger than vt2, the lcd segment of slb 1 will disappear and this status implies half battery. when lbat9 is l ess than vt2, the lcd segment of slb2 will disappear and this status implies low battery. when the low battery status lasts for 10 seconds, the lcd segment of slb 3 will be blinking. when the slb 3 is blinking for 20 seconds, the operation of meter will be i nhibited and lcd panel will show ? lo.bt?. in this case, it is suggested to replace a new battery immediately. after ?lo.bt? appears and lasts for 60 seconds, ES233 will enter to auto power off mode. l o.b t low battery condition > 30s operation not allowed dc 1.8 0 0 v low battery dc auto auto 1.8 0 0 v half battery dc auto 1.8 0 0 v full battery dc auto blinking l o.b t low battery condition > 30s operation not allowed dc 1.8 0 0 v low battery dc auto auto 1.8 0 0 v half battery dc auto 1.8 0 0 v full battery dc auto l o.b t low battery condition > 30s operation not allowed dc 1.8 0 0 v low battery dc auto auto 1.8 0 0 v half battery dc auto 1.8 0 0 v full battery dc auto blinking low battery tes t circuit (a) 120 k 470 k ba tte lbat9 v - agnd 0.1u 0v 3 v low battery test circuit (b) 910 k 30 0k ba tte lbat9 v - agnd 0.1u 0v 9v
v 2. 2 19 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 2. measurement mode switching measureme nt mode depends on the logic level of slacdc, fc1, fc2, fc3, fc4, fc5 and key selection . when fc5 is high, the measurement mode list is shown below : slacdc fc1 fc2 fc3 fc4 mode key selection 0 1 0 1 1 dc voltage measurement dcv ? acv 0 1 1 0 1 2 3 auto dc current measurement(a) dca ? aca 0 1 1 1 1 2 3 auto dc current measurement(ma) dca ? aca 0 0 0 0 0 2 3 a uto dc current measurement(a) dca ? aca 0 1 1 1 0 scan rsdc ? continuity ? diode ? cap ? s can 0 1 1 0 0 3 manual dc 4 .0 00a dca ? aca 0 1 0 0 0 3 manual dc 4 0.00a dca ? aca 0 1 0 1 0 3 manual dc 4 00.0a dca ? aca 0 1 0 0 1 3 manual dc 4 000a dca ? aca 0 0 0 1 1 resistance measurement ? continuity 0 0 0 0 1 continuity check continuity ? diode 0 0 1 1 1 resistance measurem ent ? continuity ? diode 0 0 0 1 0 frequency measurement ---- 0 0 1 1 0 capacitance measurement ---- 0 0 1 0 0 auto temperature measurement ? H 0 0 1 0 1 dcmv dc m v ? ac m v 1 1 0 1 1 ac voltage measurement a cv ? d cv 1 1 1 0 1 2 3 auto ac current measu rement(a) a ca ? d ca 1 1 1 1 1 2 3 auto ac current measurement(ma) a ca ? d ca 1 0 0 0 0 2 3 auto ac current measurement(a) a ca ? d ca 1 1 1 1 0 ef mode ---- 1 1 1 0 0 3 manual ac 4 .000a a ca ? d ca 1 1 0 0 0 3 manual ac 4 0.00a a ca ? d ca 1 1 0 1 0 3 manual ac 4 0 0.0a a ca ? d ca 1 1 0 0 1 3 manual ac 4 000a a ca ? d ca 1 0 0 1 1 1 adp0 ( 4 000 ) ---- 1 0 0 0 1 1 adp1 ( 4 00.0 ) ---- 1 0 1 1 1 1 adp2 ( 4 0.00 ) ---- 1 0 0 1 0 1 adp3 ( 4 .000 ) set to led mode if sel2 is kept float 1 0 1 1 0 capacitance measurement (clamp) ---- 1 0 1 0 0 auto temperature measurement y? 1 0 1 0 1 acmv a c m v ? d cm v note: 1. when fc5 is high, the adp0, adp1, adp2 and adp3 modes can display minus sign. 2. t hese modes could be designed for multimeter current modes, please refer to section 1. 4 . 3. t hese modes could be designed for clampmeter current modes, please refer to section 1. 5 . .
v 2. 2 20 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm measurement mode switching (c ontinued ) measurement mode depends on the logic level of slacdc, fc1, fc2, fc3, fc4, fc5 and key selection . when fc5 is low, the key func tion is disable d in most modes . the measurement mode list is shown below : slacdc fc1 fc2 fc3 fc4 mode key selection & remaks 0 1 0 1 1 d c voltage measurement ---- 0 1 1 0 1 2 3 auto dc current measurement(a) ---- 0 1 1 1 1 2 3 auto dc current measurement( ma) ---- 0 0 0 0 0 2 3 a uto dc current measurement(a) ---- 0 1 1 1 0 scan rsdc ? continuity ? diode ? cap ? s can 0 1 1 0 0 3 manual dc 4 .000a ---- 0 1 0 0 0 3 manual dc 4 0.00a ---- 0 1 0 1 0 3 manual dc 4 00.0a ---- 0 1 0 0 1 3 manual dc 4 000a ---- 0 0 0 1 1 resistance measurement ---- 0 0 0 0 1 continuity check ---- 0 0 1 1 1 diode measurement ---- 0 0 0 1 0 frequency measurement ---- 0 0 1 1 0 capacitance measurement ---- 0 0 1 0 0 auto temperature measurement 0 0 1 0 1 dcmv ---- 1 1 0 1 1 ac v oltage measurement lpf full ? ? 1k 1 1 1 0 1 2 3 auto ac current measurement(a) lpf full ? ? 1k 1 1 1 1 1 2 3 auto ac current measurement(ma) lpf full ? ? 1k 1 0 0 0 0 2 3 auto ac current measurement(a) lpf full ? ? 1k 1 1 1 1 0 ef mode ---- 1 1 1 0 0 3 manual ac 4 .000 a lpf full ? ? 1k 1 1 0 0 0 3 manual ac 4 0.00a lpf full ? ? 1k 1 1 0 1 0 3 manual ac 4 00.0a lpf full ? ? 1k 1 1 0 0 1 3 manual ac 4 000a lpf full ? ? 1k 1 0 0 1 1 1 adp0 ( 4 000 ) ---- 1 0 0 0 1 1 adp1 ( 4 00.0 ) ---- 1 0 1 1 1 1 adp2 ( 4 0.00 ) ---- 1 0 0 1 0 1 adp3 ( 4 . 000 ) set to led mode if sel2 is kept float 1 0 1 1 0 capacitance measurement (clamp) ---- 1 0 1 0 0 auto temperature measurement H 1 0 1 0 1 acmv lpf full ? ? 1k note: 1. when fc5 is lo w, the adp0, adp1, adp2 and adp3 modes can ? t display minus sign. 2. these m odes could be designed for multi - meter current modes, please refer to section 1. 4 . 3. these modes could be designed for clamp - meter current modes, please refer to section 1. 5 .
v 2. 2 21 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 3. push function all the enabled push functions will be reset when the measurement mode is changed when fc1 - fc5 modes are changed . the following table lists the available function versus every measurement mode . note: 1 include automatic a, automatic ma and manual a modes, please refer to section 1. 4 . 2 include 2 automatic modes and 4 manual modes, please refer to section 1. 5 . 3 when clamp - meter dca mode is selected, the rel function will be changed to zero function operat ion automatically. 4 only auto range temperature mode is available. 5 when rs232 (pin 99 ) is pulled to v - , push rel key and lasts for 2 seconds will active the uart output. h z m mx rel /rs232 5 bklit k ey hold range voltage mode ac o o o o o o mv mode ac o o o o o x 1 current mode for multimeter ac o o o o o o 2 current mode for clampmeter ac o o 3 o o o x resistance x o o o o o o continuity x o o o o o x diode mode x o o o o o x frequency o x o o x o o capacitance x o o o x o o temperature x o o o o o o 4 scan rsdc x x o o o o x ef mode x x o o x x x adp mode x o o o x o x
v 2. 2 22 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 3.1. range push range 1 key to switch from automatic to manual mode, and whi le in manual mode, changes the f ull - s cale range. the following figure shows the state transition. automatic mode manual mode 1 push < 1 sec 1 push > 1 sec 1 push < 1 sec range up measurement mode auto manual control range initial range v vr2 ? vr5 vri vri + 1, vr5 vr 2 4 . 0 00v ? 1000v 4 . 0 00v 2 auto a r1 ? r2 r1 r2, r2 r1 4 0 0.0a ? 4 0 00a 4 0 0.0a auto ma r1 r2 r1 r2 r2 r1 4 0 .00ma ? 4 0 0.0ma 4 0 .00ma auto a r1 r2 r1 r2 r2 r1 4 . 0 00a ? 10.00a 4 . 0 00a auto 4 0 a/ 4 0 0a (clamp) r1 r2 r1 r2 r2 r1 4 0 .00a ? 4 0 0.0a 4 0 .00a auto 4 0 0a/ 4 0 00a (clamp) r1 r2 r1 r2 r2 r1 4 0 0.0a ? 4 0 00a 4 0 0.0a capacitance c1 ? c8 ci ci + 1, c8 c1 4 . 0 00nf ? 4 0 .00mf 4 . 0 00nf capacitance (clamp) c1 ? c8 ci ci + 1, c8 c1 4 . 0 00nf ? 4 0 .00mf 4 . 0 00nf or 0 ? or 6 ori ori + 1, or 6 or 0 4 0 . 00 ? 4 0 .00 m 4 0 . 00 frequency fr1 ? fr7 fri fri + 1 fr7 fr1 4 0 0 . 0hz ? 4 0 .00mhz 4 0 0 . 0hz temp t1 - t2 t1 ? t2 t2 ? t1 400.0 o c~1350 o c 400.0 o c temp t1 ? t2 t1 ? t2 t2 ? t1 400.0 o c ~ 1350 o c 400.0 o c note: 1. pushing range resets all e xisting special modes except for vahz mode . 2. initial range of voltage mode depends on vst pin configuration
v 2. 2 23 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm original state (auto/manual) rel active. the relative value rel and h active. hold the relative value push hold push rel push rel push hold 3.2. hold a nd delay ed hold f eature hold mode makes the meter stop updating the lcd panel. this mode can be nested in most of the special modes. enabl ing hold function in automatic mode makes the meter switch to manual mode, but the full - scale range remains the same. ES233 provides a delay hold feature. to activate delay hold feature, press down the hold bottom and last for 2 seconds. the meter will del ay for 6 seconds, than enters hold mode. in the 6 - secnod delayed time, the hold symbol on lcd panel will blink. hold function and the delayed state can be cancelled by changing the measurement mode, pressing range , or push hold again. normal mode (auto/manual) hold mode (manual) push < 2s delay state (auto/manual) push > 2s push < 2s push < 2s push > 2s 6sec past 3.3. key see section ? measurement mode switching? for the function of this pin . 3.4. rel + hold in rel mode, the lcd panel displays d n+k - d n , where n = 1, 2, 3, ? , d n is the last value before rel key is pushed, and d n+k is the current value. the meter returns to normal operation if rel is pressed again. pressing hold in rel mode makes the meter stop updating the lcd panel . note: 1. it?s possible that relative value ( d n+k - d n ) exceeds 4 , 0 00 or - 4 , 0 00 counts. the lcd shows ol in rel mode only if d n or d n+k is more than 4 , 0 00 counts .
v 2. 2 24 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm original state (automatic/manual) ?max? active max value ?min? active min value ?max? ?h? act ive hold max value. ?min? ?h? active hold min value. push hold push hold 1push<1s 1 push>1 sec 1 push>1s 1 push<1s ?max? ?min? blink current value 1push<1s push hold ?max??min? ?h? blink hold current value. 1push<1s 1push<1s 1 push>1 sec 1push<1s 1push<1s 3.5. max/min + hold the meter displays the maximum or minimum value of the input in max/min mode. when mmx key is pressed for the first time, the meter displays the maximum value. the meter displays the minimum value, when it is pressed again. when mmx key is pressed for the third time, the meter displays current value. the meter returns to normal operation if mmx is pressed and held for longer than one second. pressing hold in max/min mode makes the meter stop updating the maximum or the minimum val ue. 3.6. relative + max/min + hold max/min mode can be nested in rel mode. the meter displays the maximum or minimum value relative to the reference when mmx is pressed in rel mode. pressing hold under rel + max/min makes the meter stop updating the lcd panel . original state (auto/manual) rel active. the relative value rel and max active. maximum rel. value rel max min blink. current re l. value rel and min active. minimum rel. value push m mx push mm x > 1s push m mx rel , max , h active. hold max. rel. value rel , min , h active. hold min. rel. value rel , max , min , h blink. hold the current rel. value push m mx push m mx push hold push hold push hold push m mx push rel push rel push m mx
v 2. 2 25 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 3.7. zero f unction in manual dc 4.0 00a, 40 .00a, 40 0.0a and 4 0 00a, auto dc 40 .00a/ 400.0a , and auto dc 40 0.0a/ 40 00a ( please refer to section 1.5) mesurement modes, ES233 provides z ero function to remove the residual current value. push rel key less than one second to enter zero mode. in zero mode, the lcd panel displays d n+k - d n , where n = 1, 2, 3, ? , d n is the last conversion value before rel key is pushed, and d n+k is the current conversion value. if rel key is pushed again in zero mode, the met er will refresh the d n value and displays the d n+k - d n again . the meter returns to normal operation if rel key is pressed and held for longer than one second. pressing hold in zero mode makes the meter stop updating the lcd panel. in 2- range auto dca mode s for clampmeter ( 40 0.0a/ 40 00a or 40 .00a/ 40 0.0a), the system will stay in automatic mode, even if the zero function is activated. in other words, it could achieve real automatic operation. in automatic mode, zero function could not be entered from higher r ange, but it could be still activated if current range is lower one. this is because most residual current value is so small that the range could not be higher one in automatic mode. when enter zero mode from lower range, the system will store the nonzero counts (residual current value). if the range goes up to higher one automatically, the nonzero counts will be divided by ten. so this function will still work well in automatic modes. ? state diagram for zero mode : ? state diagram for zero + hold mode : original state ?zero? active show d n+k - d n press zero > 1s press zero press zero < 1s original state ?zero? active show d n+k - d n press zero > 1s press zero press zero < 1s ?zero? ?hold? active stop lcd u pgrading press hold
v 2. 2 26 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm ? state diagram for zero + max/min + hold mode : 3.8. vahz function when voltage or current measurement mode is selected, the vahz funtion is available. push h z key to select this frequency measurement mode. the frequency i s measured by auto ranging. the maximum frequency range is 40k hz. the sensitivity of signal input is 5 % full scale of signal in voltage or current mode typically . configuration range fr1 4 00.0hz fr2 4 .000khz fr3 4 0.00khz original state (auto/manual) ?zero? ?max? active show max. d n+k - d n zero max min bl ink. current d n+k - d n ?zero? ?min? active show min. d n+k - d n push m mx push m mx > 1s push m mx ?zero? ?max? ?hold? active hold max. d n+k - d n val u e ?zero? ?min? ?hold? active hold min. d n+k - d n val u e zero , max , min , h blink. hold the current d n+k - d n push m mx push m mx push hold push hold push hold push m mx push rel push rel > 1s push m mx ?zero? active show d n+k - d n push rel < 1s
v 2. 2 27 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 4. serial data output the rs232 function will be activated if press down the rel key and last for 2 seconds , rs232 symbol will be show n on the lcd display . the serial data sent to sdo pin periodically at every a/d conversion cycle by 15 times per second . the data format complie s with 8 bits transmission code with a baud rate of 9600 . the host can use rs232 interface to read the data. a single data packet includes a start bit (always 0), 8 data bits with no parity check bit, and a stop bit (always 1). the high and low voltage leve ls correspond to dgnd and v - respectively. sdo remains at 1 (high) when it is inactive. hence the start bit (0) could be used as the triggering signal to begin the reading process. the following figure shows the data format of a single packet. s ingle pack e t 0 1 0v msb lsb -3v d7 d6 d5 d4 d3 d2 d1 d0 one data block consists of 17 packets. the following figure shows the format of a data block. the header and device code leads the whole packets. the range packet indicates the decimal point position on lcd panel of mete r. main_ digit 1- 3 consist s of the readings on the lcd panel. the function packet indicates the measurement mode of the meter. status 1- 4, unit and bargraph give the other status of the meter. cr and lf are delimiters used to separate the blocks.
v 2. 2 28 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm a ll pack ets 0 0 1 0 1 0 1 1 0 0 1 0 1 0 1 1 h e a d e r d e v i c e r a n g e m a i n _ d i g i t 1 m a i n _ d i g i t 2 m a i n _ d i g i t 3 f u n c t i o n 1 f u n c t i o n 2 f u n c t i o n 3 s t a t u s 1 u n i t b a r g r a p h c r l f s t a t u s 2 s t a t u s 3 s t a t u s 4 0 0 1 0 1 0 1 1 0 0 1 0 1 0 1 1 0 0 1 0 1 0 1 1 0 1 0 1 d 7 d 0 the meter always outputs the current value shown on lcd screen to the serial port. the detailed data format of each packet is listed below. d0 d1 d2 d3 d4 d5 d6 d7 a01 0 0 0 0 1 1 1 1 header a02 1 0 0 0 0 0 0 1 device a03 x x x x m_dp1 m_dp2 m_dp3 x range a04 m_sign x x x x x x x main_digit1 a0 5 digit3 3 digit3 2 digit3 1 digit3 0 digit2 3 digit2 2 digit2 1 digit2 0 main_digit2 a06 digit1 3 digit1 2 digit1 1 digit1 0 digit0 3 digit0 2 digit0 1 digit0 0 main_di git3 a07 v a ohm continuity diode capacitance hz duty function1 a08 va h z H x efmode scan clamp led function2 a0 9 adp0 adp1 adp2 adp3 x x x x function3 a10 auto m a nu ac dc ol ul x x status1 a11 slb3 slb2 slb1 lbat30s bw _full x bw1k hold status2 a12 rel zero max min current x x x status3 a13 danger open short disch x x x x status4 a14 mega kilo x m ili x m icro x n ano unit a15 b_sign x b0 5 b0 4 b0 3 b0 2 b0 1 x bargraph a1 6 0 0 0 0 1 1 0 1 cr a17 0 0 0 0 1 0 1 0 lf note 1. x ? undefin e d & don ? t care 2. whole packet is shown by lsb first.
v 2. 2 29 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 4.1. range this packet indicates range stat e of the meter. the m_dp1 ? m_dp3 corresponding d p1 ? dp3 of lcd segment (see section 5 ) . i n dcv 4.000v range, this a03 packet will set xxxx001x. if change to 40.00v the packet will be xxxx010x. d0 d1 d2 d3 d4 d5 d6 d7 a03 x x x x m_dp1 m_dp2 m_dp3 x 4.2. m ain_d igit 1 ?m ain_d igit 3 m ain_d igit 1 ? m ain_d igit 3 is the readings of measurement result shown on lcd panel. digitn 3 ? digitn 0 consist of 4- bit bcd code . the m_sign is the sign bit of readings. d0 d1 d2 d3 d4 d5 d6 d7 a04 m_sign x x x x x x x a0 5 digit3 3 digit3 2 digit3 1 digit3 0 digit2 3 digit2 2 digit2 1 digit2 0 a06 digit1 3 digit1 2 digit1 1 digit1 0 digit0 3 digit0 2 digit0 1 digit0 0 4.3. function th e packet s of a07- a09 indicate the measurement mode of the meter. the following table summarizes the transmitted bit f or each mode. note that the encoding of this packet is different from the encoding of fc1 - fc5 switch . for example, if the meter operates in voltage mode, this a07 packet is 1000 0000. if va h z key is pushed to vahz mode , the a08 will be 10000000 also. d0 d 1 d2 d3 d4 d5 d6 d7 a07 v a ohm continuity diode capacitance hz duty a08 va h z H x efmode scan clamp led a0 9 adp0 adp1 adp2 adp3 x x x x 4.4. status the a10 - a13 packets indicate the whole status when ES233 is in normal operation. for example, if meter is operated at acv / m a nu range, then a10 packet will set 011000xx . the format of th e four packets are shown below. d0 d1 d2 d3 d4 d5 d6 d7 a10 auto m a nu ac dc ol ul x x a11 slb3 slb2 slb1 lbat30s bw _full x bw1k hold a12 rel zero max min current x x x a 13 danger open short disch x x x x
v 2. 2 30 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm auto : when auto range is selected. m a nu : when manual mode is selected. ac : when ac mode is selected. dc : when dc mode is selected. ol : when ? ol ? is displayed on lcd. ul : when ? ul ? is displayed on lcd. slb3/slb2/slb1 : w hen low battery segment is shown on lcd. lbat30s : when ? l obt ? is shown on lcd. bw1k/full : indication of low - pass - filter 3db bandwidth. hold : when data hold mode is active. rel : when relative mode is active. zero : when zero mode is active. max/min/current : when max/min mode is active. if current=1 means max/min symbol is blinking on lcd. clamp : when clamp current mode is selected. danger : hazard voltage warning symbol is active on lcd. open : open state is detected on scan mode. short : short circuit is detect ed on continuity or diode mode. disc : t h e ? disc ? is shown on lcd. it means the dut is necessary to be discharged on cap mode. 4.5. unit t his packet indicates the measurement unit of the lcd display . d0 d1 d2 d3 d4 d5 d6 d7 a14 mega kilo x m ili x m icro x n an o 4.6. bargraph the a15 packet is the readings of bar - graph shown on lcd panel. b0 5 ? b01 consist of 5- bit unsigned binary code. the b_sign is the sign bit of bar - graph. the format of this pack et is shown below . d0 d1 d2 d3 d4 d5 d6 d7 a15 b_sign x b0 5 b0 4 b0 3 b0 2 b0 1 x 4.7. cr carriage return : the transmitted code is 000 01101. 4.8. lf line feed : the transmitted code is 00001010.
v 2. 2 31 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 5. miscellaneous the conditions, which the meter turns on the buzzer, include: (1) changing measurement mode generates one beep. (2) pressing any of the push functions generates one beep, if the function is valid. (3) power on and re - power on generate one beep. (4) input overflow in voltage and current mode generates one beep every 0.3 seconds (or 3.33 beeps per second.) (5) continuity(diode) check gener ates a continuous 2khz beep whenever the measurement is less then 30(30mv) (6) auto power off generates a 2khz beep which lasts for 1.5 seconds. the following figures show the output waveform from the buzout pin. 0.5 ms (a) continuou s 2khz beep 0.3 sec 0.15 sec (b) 3.33 beep/sec
v 2. 2 32 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 5.1. lcd panel s01 s02 s03 s04 s05 s06 s07 s08 s09 s10 s11 s12 s13 s14 s15 bp1 slb1 apo scan auto 4f 4a 4b hold 3f 3a 3b buz 2f 2a bp2 slb2 rs232 man ac minus 4e 4g 4c dp3 3 e 3g 3c dp2 2e 2g bp3 slb3 danger bar0 dc bar3 b ar 4 4d b ar 6 bar 7 bar 9 3d bar1 1 bar1 2 bar1 3 2d bp4 bar - bar1 bar2 b ar 5 bar 8 bar1 0 bar 14 s16 s17 s18 s19 s20 s21 s22 s23 s24 s25 s26 s27 s28 s29 bp1 2b diode 1f 1a 1b rel led 2 m n vin adp0 bp2 2c dp1 1e 1g 1c max full m2 k 1 com adp1 bp3 bar 15 bar 17 bar 18 1d bar2 0 min H v m1 main adp2 bp4 bar 16 bar 19 % 1k a hz f ain adp3 lcd backplane waveform bp1 bp2 bp3 bp4 v - +3.1 v - v - +3.1 v - v - +3.1 v - v - +3.1 v - auto dc ac apo hold scan manu bp1 bp2 bp3 bp4 s13 s14 s15 s16 s17 s18 s19 s20 s26 s25 s23 s02 s01 s03 s04 s05 s06 s07 s08 s09 s10 s12 s11 rs232 min max m hz v a f m m n k s24 1k full 10k % s21 s27 bp1 bp2 bp3 bp4 s28 test adp0 adp1 adp2 adp3 s29 bp3 auto dc ac apo hold scan manu bp1 bp2 bp3 bp4 s13 s14 s15 s16 s17 s18 s19 s20 s26 s25 s23 s02 s01 s03 s04 s05 s06 s07 s08 s09 s10 s12 s11 rs232 min max m hz v a f m m n k s24 1k full 10k % s21 s27 bp1 bp2 bp3 bp4 s28 test adp0 adp1 adp2 adp3 s29 bp3
v 2. 2 33 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 5.2. lcd d isplay o n c o ndition lcd annunciator condition v in voltage measurement mode, and diode measurement mode. a in current measurement mode. in resistance measurement mode, and continuity mode. f in capacitance measurement mode. in continuity check mode. in dio de mode. % in duty cycle measurement. hz in frequency mode. adp1 when adp1 mode is active . adp2 when adp2 mode is active . adp3 when adp3 mode is active . adp4 when adp4 mode is active . dc in dc voltage or dc current mode. ac in ac voltage or ac curr ent mode. auto when automatic full scale range selection is enabled. manu in manual mode. hold when hold function is enabled. when relative function is enabled. m ax when m ax function is enabled. min when min function is enabled. scan when smart (resistance, continuity, diode, capacitance auto check mode) is active. m 1 in capacitor measurement mode and the full scale range is in the order of mf. 1 in capacitor measurement mode and the full scale range is in the ord er of uf. n in capacitor measurement mode and the full scale range is in the order of nf. m 2 in voltage or current measurement mode and the full scale range is in the order of 10 -3 . 2 in current measurement mode and the full scale range id in the order of ua. m in resistance measurement mode and the full scale range is in the order of m . k in resistance measurement mode and the full scale range is in the order of k . in temperature measurement mode and when the unit is . H in temperature measure ment mode and when the unit is H . when the reading is exceeding default hazardous live voltage or ol in dcv or acv, the hv warning symbol will be display. apo when auto power off function is enabled. slb 1 when voltage ( ref. to v - ) of lbat9 pin is less than vt1, slb1 will disappear. slb 2 when voltage (ref. to v - ) of lbat9 pin is less than vt2, slb2 will disappear. slb 3 when slb2 disappears for 8 seconds, slb3 will be blinking. rs232 when rs232 output is enabled. test when led measurement function is enabled .
v 2. 2 34 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 5.3 operating timing ES233 incorporates a dual slope adc with four phases: zi, az, int and dint. the timing of each phase are listed below. (1) voltage / diode /adp / manual current (for clampmeter) measurement: phase high resolution high speed zi 5 0ms 5ms az 25ms 2.5ms int 100ms 10ms dint 1 55ms 15.5ms (2) current mode for multimeter/auto current mode for clampmeter/2 - range auto voltage mode: phase dc / ac dc lower range zi 5 0ms 5 0ms az 25ms 25ms int 100ms 1000 ms dint 155ms 175ms (3) continuity / ohm measurement: phase time zi 5 0ms az 100ms int 25ms * dint 155ms note : int time = 250ms for 40.00 ? range (4) capacitance measurement: range total measurement time 4 . 0 00nf 0.3 6 sec 4 0 .00nf 0.3 6 sec 4 0 0.0nf 1.15 sec 4 . 0 00f 1.15 sec 4 0 .00f 0. 33 sec 4 0 0.0f 2.2 sec (max) 4 . 0 00mf 0.9 sec (max) 4 0 .00mf 8.8 sec (max) (5) frequency / duty cycle / vahz measurement: every conversion takes 1.05 second. (6) temperature measurement : every conversion takes 1.25 second . note: 1. in the frequency measurement with auto mode, if the range is changed, the internal clock rate will increase ten times and the new measurement cycle bec omes 1/10 times of the original cycle until the range is stable.
v 2. 2 35 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm ? application circuit 1. t ure rms circuit 1 2 3 4 5 6 a b c d 6 5 4 3 2 1 d c b a title num b e r revision size b date : 6-mar-2015 sh ee t of file: d:\protel 99\protel file\ka035\ka035_spec.ddb drawn by : trms ( es5 ) demo bo ard circuit v1 jack chang es 23 3 + c2 10uf + c3 10uf z r2 7 . 5v v + c7 0.1uf c6 0.1uf z r1 5 . 6v sw1 power switch v - ba t- ba t+ bz1 bu zz e r v - r9 10k r10 10k b zo u t q1 2n3906 d1 bkout r1 100k v - b ko u t r11 100 d2 hv r2 100k v - alarm r12 100 q3 2n3904 q2 2n3904 d3 sh or t r3 100k v - alarm1 r13 100 q8 2n3904 v - v + c21 100nf c20 220nf r33 470k c19 100nf c23 47nf c18 22nf c24 1 uf c22 220nf r23 1 00 r35 1 k r37 101k r38 1.111m precision resistors ovsg r36 10.01k r39 10m bot t om polygon plane mvi n c25 2.2nf c26 300pf c27 1 nf c9 470nf r24 9k c30 220pf r27 2 00 c22 cl os e t o i c c12 0-100pf c11 0-100pf r28 2 00 r26 180k v r1 sleep c alenp sda p sclp b zo u t b ko u t alarm1 alarm s eg2 0 s eg2 1 s eg2 2 s eg2 3 s eg1 6 s eg1 7 s eg1 8 s eg1 9 s eg1 2 s eg1 3 s eg1 4 s eg1 5 s eg0 8 s eg0 9 s eg1 0 s eg1 1 s eg0 4 s eg0 5 s eg0 6 s eg0 7 s eg0 3 s eg0 2 s eg0 1 b p4 b p3 b p2 b p1 seg28 seg27 s eg2 6 s eg2 5 s eg2 4 seg29 c es e l s el 2 s el 1 dis a pos el tsel v st vbar rs232 y1 4 mh z key b kl i t f c5 range h ol d f c2 f c3 f c4 f c1 rsout m mx r el slacdc hz lbat9 c8 470nf r14 200 r15 2 . 2k p tc + c10 2.2uf q4 2n3904 q7 2n3904 q5 2n3904 q6 2n3904 vr_clamp daco v rh v r1 2k r25 900 v r2 200 a0 1 a1 2 a2 3 g nd 4 sda 5 scl 6 wp 7 v cc 8 u2 24a02 v - r19 47k c alenp sda p sclp r20 47k acvh c15 10nf r32 470k c17 22nf c16 22nf r5 100k a dp t em p in v r_ a dp r6 100k r4 100k i vs buff in 1 nc 2 common 3 output offset 4 cs 5 den input 6 nc 7 ca v 8 r ms o ut 9 - vs 10 + vs 11 nc 12 vin 13 buff out 14 u3 es5 v s + v s - r29 100k r30 4 . 7k v r3 500k + c32 4.7uf v s + v s - + c4 10uf + c5 10uf v s + v s - r8 100k vin 1 1 gnd 1 fin dc 3.0v metallized polypropylene film capacitor : c20 metallized polyester capacitor : c9, c16 , c19, c21 r17 2 .2k ptc r18 2 .2k ptc q10 2n3904 q9 2n3904 q12 2n3904 q11 2n3904 q14 2n3904 q13 2n3904 r16 2 .2k ptc sw1 6 r c_ s w sw3 fc5 sw4 fc4 sw2 sl acd c f c4 f c5 slacdc v - sw5 fc3 sw6 fc2 sw7 fc1 f c1 f c2 f c3 sw8 hz sw1 0 rel sw9 m mx hz r el m mx v - sw1 2 bkl i t b kl i t sw1 3 key sw1 4 h ol d h ol d key sw1 5 range range 1 j4 1 j5 sw1 8 ua sw1 9 ma ua/ ma ua/ ma /a ua ma d5 f? f? a 1 j6 com r40 99 r41 0 . 99 r42 0 . 01 d4 d6 d7 nc 127 cln 10 nc 128 ivs 1 a dp 2 chp 5 chn 6 cih 7 bufh 8 cil 12 caz h 9 clp 11 caz l 13 bufl 14 raz 15 v rh 16 vr_clamp 18 o hm c4 20 o hm c3 21 o hm c2 22 o hm c1 23 o vsg 24 o r1 25 v r4 27 v r3 28 v r2 29 acvl 30 v r5 26 acvh 31 a di 32 a do 33 test5 34 sgn d 35 v r1 36 lpfout 38 mvi n 37 lpc1 39 lpc2 40 lpc3 41 can 42 cap 43 r1 0k 44 r1k 45 o vx 46 o vh 47 ovh1 48 sleep 49 freq 50 calenp 51 sda p 52 bzout 54 bkout 55 alarm1 56 alarm 57 bp4 58 bp3 59 bp2 60 bp1 61 se g2 9 62 se g2 8 63 seg2 6 65 seg2 5 66 seg2 4 67 seg2 3 68 seg2 2 69 seg2 1 70 seg2 0 71 seg1 9 72 seg1 8 73 seg1 7 74 seg1 6 75 seg1 5 76 seg1 4 77 seg1 3 78 seg1 2 79 seg1 1 80 seg1 0 81 seg0 9 82 seg0 8 83 seg0 7 84 seg0 6 85 seg0 5 86 seg0 4 87 seg0 3 88 seg0 2 89 seg0 1 90 cese l 91 sel 2 92 sel 1 93 d is 94 tsel 95 v st 96 aposel 97 vbar 98 rs232 99 o sc2 1 00 o sc1 1 01 t em pin 3 clampi n 4 vr_adp 19 rsout 1 02 nc 103 hz 104 m mx 105 rel 106 bkl i t 107 key 108 h ol d 109 range 110 fc5 111 fc4 112 fc3 113 fc2 114 fc1 115 sl acd c 116 cn 117 cp 118 lbat9 119 v- 120 v- 121 v+ 122 v+ 123 dgnd 124 agnd 125 agnd 126 d aco 17 sclp 53 se g2 7 64 u1 ES233 acvh fi xed 1k fi xed 10 k a di sw1 7 acv_sw sw1 1 clampin r7 10k c13 220pf a di c31 22uf
v 2. 2 36 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm 2. av g 1 2 3 4 5 6 a b c d 6 5 4 3 2 1 d c b a title num b e r revision size b date : 30-oct-2014 sh ee t of file: d:\protel 99\protel file\ka035\ka035_spec.ddb drawn by : avg demo board circuit v1 jack chang es 23 3 + c2 10uf + c3 10uf z r2 7 . 5v v + c5 0.1uf c4 0.1uf z r1 5 . 6v sw1 power switch v - ba t- ba t+ bz1 bu zz e r v - r9 10k r10 10k b zo u t q1 2n3906 d1 bkout r1 100k v - b ko u t r12 100 d2 hv r2 100k v - alarm r13 100 q3 2n3904 q2 2n3904 d3 sh or t r3 100k v - alarm1 r14 100 q8 2n3904 v - v + c20 100nf c19 220nf r36 470k c18 100nf c22 47nf c17 22nf c23 1 uf c21 220nf r24 1 00 r38 1 k r40 101k r41 1.111m precision resistors ovsg r39 10.01k r42 10m bot t om polygon plane mvi n c24 2.2nf c25 300pf c26 1 nf c8 470nf r25 9k c31 220pf r18 2 .2k ptc r28 2 00 c22 cl os e t o i c c11 0-100pf c10 0-100pf r19 2 .2k ptc r29 2 00 r27 180k q10 2n3904 q9 2n3904 q12 2n3904 q11 2n3904 v r1 sleep c alenp sda p sclp b zo u t b ko u t alarm1 alarm s eg2 0 s eg2 1 s eg2 2 s eg2 3 s eg1 6 s eg1 7 s eg1 8 s eg1 9 s eg1 2 s eg1 3 s eg1 4 s eg1 5 s eg0 8 s eg0 9 s eg1 0 s eg1 1 s eg0 4 s eg0 5 s eg0 6 s eg0 7 s eg0 3 s eg0 2 s eg0 1 b p4 b p3 b p2 b p1 seg28 seg27 s eg2 6 s eg2 5 s eg2 4 seg29 c es e l s el 2 s el 1 dis a pos el tsel v st vbar rs232 y1 4 mh z key b kl i t f c5 range h ol d f c2 f c3 f c4 f c1 rsout m mx r el slacdc hz lbat9 c7 470nf r15 200 r16 2 . 2k p tc + c9 2.2uf q4 2n3904 q7 2n3904 q5 2n3904 q6 2n3904 vr_clamp daco v rh r11 10k r30 15k r31 15k a di acvh a do acvl + c29 1uf + c30 1uf c6 0.1uf r34 56k r33 56k r32 3 . 9k v r1 2k r26 900 v r2 200 a0 1 a1 2 a2 3 g nd 4 sda 5 scl 6 wp 7 v cc 8 u2 24a02 v - r20 47k c alenp sda p sclp r21 47k sw3 fc5 sw4 fc4 sw2 sl acd c f c4 f c5 slacdc v - sw5 fc3 sw6 fc2 sw7 fc1 f c1 f c2 f c3 c14 10nf r35 470k c16 22nf c15 22nf r5 100k a dp t em p in v r_ a dp r6 100k r4 100k i vs sw8 hz sw1 0 rel sw9 m mx hz r el m mx v - sw1 2 bkl i t b kl i t sw1 3 key sw1 4 h ol d h ol d key sw1 5 range range d5 1n4148 d4 1n4148 r8 100k vin 1 1 gnd 1 fin dc 3.0v metallized polypropylene film capacitor : c19 metallized polyester capacitor : c8, c15 , c18, c20 sw1 6 r c_ s w r17 2 .2k ptc q14 2n3904 q13 2n3904 1 j4 1 j5 sw1 8 ua sw1 9 ma ua/ ma ua/ ma /a ua ma d6 f? f? a 1 j6 com r43 99 r44 0 . 99 r45 0 . 01 d7 d8 d9 nc 127 cln 10 nc 128 ivs 1 a dp 2 chp 5 chn 6 cih 7 bufh 8 cil 12 caz h 9 clp 11 caz l 13 bufl 14 raz 15 v rh 16 vr_clamp 18 o hm c4 20 o hm c3 21 o hm c2 22 o hm c1 23 o vsg 24 o r1 25 v r4 27 v r3 28 v r2 29 acvl 30 v r5 26 acvh 31 a di 32 a do 33 test5 34 sgn d 35 v r1 36 lpfout 38 mvi n 37 lpc1 39 lpc2 40 lpc3 41 can 42 cap 43 r1 0k 44 r1k 45 o vx 46 o vh 47 ovh1 48 sleep 49 freq 50 calenp 51 sda p 52 bzout 54 bkout 55 alarm1 56 alarm 57 bp4 58 bp3 59 bp2 60 bp1 61 se g2 9 62 se g2 8 63 seg2 6 65 seg2 5 66 seg2 4 67 seg2 3 68 seg2 2 69 seg2 1 70 seg2 0 71 seg1 9 72 seg1 8 73 seg1 7 74 seg1 6 75 seg1 5 76 seg1 4 77 seg1 3 78 seg1 2 79 seg1 1 80 seg1 0 81 seg0 9 82 seg0 8 83 seg0 7 84 seg0 6 85 seg0 5 86 seg0 4 87 seg0 3 88 seg0 2 89 seg0 1 90 cese l 91 sel 2 92 sel 1 93 d is 94 tsel 95 v st 96 aposel 97 vbar 98 rs232 99 o sc2 1 00 o sc1 1 01 t em pin 3 clampi n 4 vr_adp 19 rsout 1 02 nc 103 hz 104 m mx 105 rel 106 bkl i t 107 key 108 h ol d 109 range 110 fc5 111 fc4 112 fc3 113 fc2 114 fc1 115 sl acd c 116 cn 117 cp 118 lbat9 119 v- 120 v- 121 v+ 122 v+ 123 dgnd 124 agnd 125 agnd 126 d aco 17 sclp 53 se g2 7 64 u1 ES233 fi xed 1k fi xed 10 k acvl acvh a do a di test5 sw1 7 acv_sw sw1 1 clampin r7 10k c12 220pf test5 c32 4.7uf
v 2. 2 37 2015 / 1 2 / 1 5 es 23 3 4 000 counts dmm ? package information 1. 128l l qfp outline drawing 2. dimension parameters

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