EMV 1025S-01

**EMV 1025S-0 1** 

Single Hole Mounting Meter 

EMV 1025S-0 1 is an easy to mount LCD digital voltmeter. It features 200mV full scale reading, auto-zero and auto-polarity. Installation time is greatly reduced with only 3 wires to connect. The user need only drill a single 5.5mm / / " hole in the panel. The module is fitted to the panel by locating its screw threaded stud through the hole, adding the washer and tightening the nut provided. The module's connections pass through the hollow stud into the target application. A rubber seal is included, providing splashproof protection for the unit when fitted to the meter during installation. This datasheet also refers to OEM variants, referred to as EMV 1025S-X X, where X X refers to the factory-configured scaling and decimal configuration options. 

- **Single Hole Mounting** 

- **12.5mm / 0.5" LCD Digit Height** 

- **200mV Full Scale Reading** 

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- **3-Wire Connection** 

- **Auto-zero, Auto-polarity** 

- **Low Battery Warning** 

- **Splashproof** 

Shown Actual Size 

|**Stock Numbers***|
|---|
|**EMV 1025S-X X**|
|Range<br>Decimal Point|
|0=200mV<br>0=NO DP|
|1=2V<br>1=DP1|
|2=20V<br>2=DP2|
|3=200V**<br>3=DP3|
|e.g.: EMV 1025S-1 3<br>2Vd.c. full scale, DP3 displayed|
|(1.999)|
|For modules manufactured to your scaling requirements,|
|contact Lascar direct.*|
|*<br>Minimum order quanitity of 50 pcs. applies.|
|** Maximum allowable input voltage is 60Vd.c.|



|**Specifications**<br>**Min.**<br>**Typ.**<br>**Max.**<br>**Unit**<br>~~SE~~|**Specifications**<br>**Min.**<br>**Typ.**<br>**Max.**<br>**Unit**<br>~~SE~~|**Specifications**<br>**Min.**<br>**Typ.**<br>**Max.**<br>**Unit**<br>~~SE~~|**Specifications**<br>**Min.**<br>**Typ.**<br>**Max.**<br>**Unit**<br>~~SE~~|**Specifications**<br>**Min.**<br>**Typ.**<br>**Max.**<br>**Unit**<br>~~SE~~|
|---|---|---|---|---|
|Accuracy (overall error)*<br>~~ES~~|~~ES~~<br>~~SE~~<br>~~ee~~|0.1<br>~~ES~~<br>~~ee~~|~~ES~~<br>~~ee~~|%(±2 counts)<br>~~ES~~|
|Linearity<br>~~es~~|~~SE~~<br>~~es~~<br>~~ee~~|~~es~~<br>~~ee~~|±1<br>~~es~~<br>~~ee~~|count<br>~~es~~|
|Displayed reading<br>~~es~~|-1999<br>~~es~~<br>~~ee~~|~~es~~<br>~~ee~~|1999<br>~~es~~<br>~~ee~~|~~es~~|
|Resolution|~~ee ~~|0.1<br> ~~ee ~~|~~ee~~|mV d.c.|
|Sample rate||3||sample/sec|
|Operatingtemperature range|0<br>~~ee~~|~~ee~~|50<br>~~ee~~|°C|
|pgpg<br>Temperature stability<br>~~es~~|~~es~~<br>~~ee~~<br>~~SS SS~~|100<br>~~es~~<br>~~ee~~<br>~~SS SE~~|~~es~~<br>~~ee~~<br>~~SE~~|ppm/°C<br>~~es~~|
|Supplyvoltage<br>~~es~~<br>~~SS~~|3.5<br>~~es~~<br>~~ee~~<br>~~SS~~<br>~~SS SS~~|5<br>~~es~~<br>~~ee~~<br>~~SS~~<br>~~SS SE~~|7.0<br>~~es~~<br>~~ee~~<br>~~SS~~<br>~~SE~~|V d.c.<br>~~es~~|
|Supply current|~~ee ~~<br>~~SS SS~~|250<br> ~~ee ~~<br>~~SS SE~~|~~ee~~<br>~~SE~~|A|



- To ensure maximum accuracy, recalibrate periodically. 

Unless otherwise noted, specifications apply at T =25°C, V =5Vd.c. (f =48kHz) and are tested with the module configured for fully floating input mode. 

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DIMENSIONS All dimensions in mm (inches)<br><> 31 (1.22)<br>Seal<br>Panel 3 Wires - 30cm (12.0)<br>14.5<br>(0.57) EMV 1025S-X X<br>(CHC Ne<br>| aals aal al :<br>PTT \}  =<br>DP3 DP2 DP1 5.5 (0.2)<br>Nut<br>10.5 REAR VIEW 9.0 Washer<br>(0.35)<br>(0.41)<br>5.00<br>(0.20)<br>10.5<br>(0.41) CAL<br>V o} ! ae 1  i<br>FITTING THE EMV 1025S-0 1<br>Drill a 5.5mm / / " hole in the panel. Fit seal to the rear of the module. Fit the<br>22.0 (0.87) 22.0 (0.87) module to the panel by passing its screw threaded stud through the hole, fitting the<br>washer and tightening the nut provided. Do not to overtighten the nut as this may<br>Module thickness 5.5mm (0.22)<br>damage the meter.<br>**----- End of picture text -----**<br>


**www.lascarelectronics.com** 

**LASCAR ELECTRONICS (HK) LTD.** 

**LASCAR ELECTRONICS LTD. LASCAR ELECTRONICS INC. MODULE HOUSE, WHITEPARISH, 4258 WEST 12th STREET, WILTSHIRE SP5 2SJ ERIE, PA 16505 UK USA TEL: +44 (0)1794 884567 FAX: +44 (0)1794 884616 TEL: +1 (814) 835 0621 FAX: +1 (814) 838 8141 E-MAIL: sales@lascar.co.uk E-MAIL: us-sales@lascarelectronics.com** 

**8th FLOOR, CHINA AEROSPACE CENTRE, 143 HOI BUN ROAD, KWUN TONG, KOWLOON, HONG KONG TEL: +852 2389 6502 FAX: +852 2389 6535 E-mail: saleshk@lascar.com.hk** 

## **TERMINAL FUNCTIONS** 

1. Red V+ Positivepowersupplyconnection. 

2. Black GND Negativepowersupplyconnection. 3. Yellow INHI PositivemeasuringinputwithreferencetoGND. 

## **SAFETY** 

To comply with the Low Voltage Directive (LVD 93/68/EEC), input voltages to the module’s pins must not exceed 60Vdc. The user must ensure that the incorporation of the unit into the user’s equipment conforms to the relevant sections of BS EN 61010 (Safety RequirementsforElectricalEquipmentforMeasuring,ControlandLaboratoryUse). 

## **VOLTAGESCALING** 

Two resistors Ra and Rb may be added in order to alter the full scale reading (FSR) of the meter - see table and diagrams below. The meter may be re-calibrated by adjusting the calibration potentiometerattherearofthemodule. 

## **CURRENTSCALING** 

A current shunt Rs may be added in order to alter the full scale reading (FSR) of the meter - see table and diagrams below. The meter may be re-calibrated by adjusting the calibration potentiometerattherearofthemodule. 

||**Required V**<br>**Ra**<br>**Rb**<br>**FSR**<br>2V*<br>910k<br>100k<br>20V*<br>1M<br>10k<br>200V*<br>1M<br>1k<br>~~es~~<br>eo ee<br>~~so~~<br>eo|* Subject to a minimum order quantity of 50<br>pcs., pre-scaled modules are available from<br>Lascar. See stock number table on the front of<br>this datasheet. Customer-specific scaling options<br>may also be available on request. Contact Lascar<br>sales office for details.|
|---|---|---|
||**Required I**<br>**Rs**<br>**P**<br>**FSR**<br>**(Power Rating)**||
||200uA<br>1k<br>0.04mW||
|2mA<br>100<br>0.4mW<br>20mA<br>10<br>4mW<br>200mA<br>1<br>40mW<br>2A<br>100m<br>400mW<br>20A<br>10m<br>4W<br>200A<br>1m<br>40W<br>~~ec~~<br>~~eo~~<br>~~ee~~<br>2<br>~~ee~~<br>~~po~~<br>po||** We recommend that purpose made shunts<br>are used for these ranges.|



## **APPLICATIONS** 

Do not connect more than one meter to the same power supply if the meters cannot use the same signal ground. Do not connect IN HI to a voltage greater than (V+ - 1V )or to a voltage lower than (-(V+) + 1V) if the meter is unscaled, as this may damage the meter. Keep leads short to ensure noise-free operation. To maximise measurement accuracy, use high precision (1%), low temperature drift (50ppm/°C or better) scaling resistors (Ra, Rb and Rs). 

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+3.5 to +7.5V d.c. V+<br>V+<br>I<br>+5V<br>Ra IN HI 2 \ 7805 4<br>Vin Supply Voltage V+<br>| a a we<br>Voltage to bemeasured Rb V Load<br>GND (8-30V)*<br>220nF 470nF<br>0V 0V<br>Measuring a single ended input GND IN HI<br>referenced to supply.<br>Rs<br>Rs = VFSR<br>Measuring current. IFSR<br>The module shown is an EMV 1025S-0 2<br>I<br>I<br>7805 +5V Ra=1M S selects between voltage and current measurement<br>oy V+<br>(8-30V)*V supply = 220nF 470nF IN HI S , 1 AV Rb=8k Load RL Voltage:Current: Rs = 200mVRa, Rb and Rcal scale the module for 20V(e.g. 10m / 4W for I =20A)<br>| | Q FSR<br>I FSR<br>Calibration:<br>R =5k<br>GND ; 7 First calibrate the current range, by adjusting the meter's own calibration<br>Rs potentiometer. Then calibrate the voltage range, by adjusting the RCAL<br>iv<br>potentiometer.<br>Shunt<br>Measuring supply voltage and current.<br>**----- End of picture text -----**<br>


* Consult 7805 voltage regulator manufacturer's datasheet for minimum and maximum allowable input voltage ratings. 

_**Specifications liable to change without prior warning**_ **EMV 1025S-X X Issue 8 06/2010 IRCN 0539 S.L. Applies to EMV 1025S/1**