EMV 1125

**EMV 1125** 

Single Hole Mounting Meter 

EMV 1125 is an easy to mount LCD digital panel meter. 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, fitting the washer and tightening the nut provided. The module's 10 connecting wires pass through the hollow stud into the target application, where they can be easily soldered into place. The module features 200mV full scale input, auto-zero and auto-polarity. A separate screw terminal adaptor board (T/BLK-4) simplifies connection and calibration. A rubber seal is included, providing splashproof protection for the unit when fitted to the meter during installation. 

- **Single Hole Mounting** 

- **200mV Full Scale Reading** 

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

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

- **10 Wire Connections** 

- **Low Battery Warning** 

Shown Actual Size 

- **Screw Terminal Board (T/BLK-4)** 

- **Splashproof** 

|**Specification**|**Min.**<br>~~es~~|**Typ.**<br>~~ee~~|**Max.**|**Unit**|
|---|---|---|---|---|
|Accuracy (overall error)*<br>~~es~~|~~es~~<br>~~es~~<br>~~eS~~|0.05<br>~~es~~<br>~~ee~~<br>~~SS~~|0.1<br>~~es~~<br>~~SS~~|%(±1 count)<br>~~es~~|
|Linearity<br>~~es~~|~~es~~<br>~~es~~<br>~~eS~~<br>~~eS~~|~~ee~~<br>~~es~~<br>~~SS~~|±1<br>~~es~~<br>~~SS~~|count<br>~~es~~|
|Displayed reading<br>~~Ss~~|-1999<br>~~eS ~~<br>~~Ss~~<br>~~eS~~<br>~~es~~|~~SS~~<br>~~Ss~~|1999<br>~~SS~~<br>~~Ss~~|~~Ss~~|
|Resolution<br>~~Ss~~<br>~~a~~|~~eS~~<br>~~Ss~~<br>~~es~~<br>~~**eS**~~|0.1<br>~~Ss~~<br>~~SS~~|~~Ss~~<br>~~SS~~|mV d.c.<br>~~Ss~~|
|Sample rate<br>~~Ss~~<br>~~a~~|~~es~~<br>~~Ss~~<br>~~**eS**~~|3<br>~~Ss~~<br>~~SS~~<br>~~eS~~|~~Ss~~<br>~~SS~~|sample/sec<br>~~Ss~~|
|Operatingtemperature range<br>~~a~~|0<br>~~**eS**~~<br>~~eS~~|~~SS~~<br>~~eS~~<br>~~SS~~|50<br>~~SS~~<br>~~SS~~|°C|
|Temperature stability<br>~~a~~<br>~~eS~~|~~**eS** ~~<br>~~eS~~<br>~~eS~~<br>~~es~~|100<br> ~~SS~~<br>~~eS~~<br>~~eS~~<br>~~SS~~|~~SS~~<br>~~eS~~<br>~~SS~~|ppm/°C<br>~~eS~~|
|Supplyvoltage<br>~~Ss~~|7.5<br>~~eS ~~<br>~~Ss~~<br>~~es~~<br>~~es~~|9<br> ~~SS~~<br>~~Ss~~<br>es|15<br>~~SS~~<br>~~Ss~~|V d.c.<br>~~Ss~~|
|Supply current<br>~~es~~|~~es~~<br>~~es~~<br>~~es~~|150<br>~~es~~<br>es|~~es~~|A<br>~~es~~|



- To ensure maximum accuracy, re-calibrate periodically. 

## **SAFETY** 

Unless otherwise noted, specifications apply at TA=25°C, Vsupply=9Vd.c. (fclock=48kHz) and are tested with the module configured for fully floating input mode. 

To comply with the Low Voltage Directive (LVD 93/68/EEC), input voltages to the module’s pins must not exceed 60Vd.c. If voltages to the measuring inputs do exceed 60Vd.c., then fit scaling resistors externally to the module. The user must ensure that the incorporation of the meter into the user’s equipment conformstotherelevantsectionsofBSEN61010(SafetyRequirementsforElectricalEquipmentforMeasuring,ControlandLaboratoryUse). 

## **DIMENSIONS All dimensions in mm (inches)** 

## **FITTING THE EMV 1125** 

Drill a 5.5mm / / " hole in the panel. Fit seal to the rear of the module. Fit the module to the panel by passing its screw threaded stud and the wires through the hole, fitting the washer and tightening the nut provided. Take care not to trap any of the connecting wires. Do not to overtighten the nut as this may damage the meter. 

**==> picture [498 x 189] intentionally omitted <==**

**----- Start of picture text -----**<br>
(a cece the connecting wires. Do not to overtighten the nut as this may damage the meter.<br>Seal<br>Panel T/BLK-4 10 Wires - 30cm (12.0)<br>44.0 (1.73)<br>EMV 1125<br>/—<@—$_—_—_—_—> We /<br>10.5 REAR VIEW<br>(0.41)<br>5.00<br>i \ bers=H<br>10.5 (0.20) Nut<br>(0.41) 9.0 Nut Shakeproof<br>(0.35) Washer<br>1 0 | ! h a<br>22.0 (0.87) 22.0 (0.87)<br>If T/BLK-4 is not fitted, then do not fit the first nut.<br>Module thickness 5.5mm (0.22)<br>21.0 (0.82)<br>**----- End of picture text -----**<br>


**WEBSITE: http://www.lascarelectronics.com/** 

**LASCAR ELECTRONICS LTD. MODULE HOUSE, WHITEPARISH, WILTSHIRE SP5 2SJ UK** 

**LASCAR ELECTRONICS INC. 4258 West 12th Street, Erie, PA 16505 USA** 

**LASCAR ELECTRONICS (HK) LTD. 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** 

**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** 

- **WIRE CONNECTIONS (EMV 1125) and SCREW TERMINAL FUNCTIONS (T.BLK-4)** 0. Black(BK) V- Negativepowersupplyconnection. 1. Brown(BR) COM ThegroundfortheanaloguesectionoftheA/Dconverter,heldactivelyat2.8V(nom.)belowV+. COMmustnotbeallowedtosinkexcessivecurrent(>100 A)byconnectingitdirectlytoahighervoltage. 

- 2. Red(RD) V+ Positivepowersupplyconnection. 3. Orange(OR) Vref Connectionforcalibrationcircuit(seediagrambelow). 4. Yellow(YL) INHI Positivemeasuringdifferentialinput. INHIandINLOmustbenocloserthan1Vtoeitherthepositiveornegativesupply. 5. Green(GR) INLO Negativemeasuringdifferentialinput. ii (OnT/BLK-4,INLO isconnectedtoCOMvianormally-closedLinkL2.) 6. Blue(BL) DPCOM CommonconnectionfordecimalpointsDP1,DP2andDP3,seebelow. 7. Violet(VI) DP1 199.9 8. Grey(GY) DP2 19.99 ConnecttoDPCOMtodisplayrequireddecimalpoint. ~~}~~ 

- 9. White(WT) DP3 1.999 (ormakeappropriatesolderlinkonT/BLK-4) 

## **SCALING and CALIBRATION** 

A calibration circuit and two resistors (Ra and Rb) may be added on the EMV 1125 or T/BLK-4 board (cut Link La if fitting Ra) to alter the full scale reading of the meter - see table. Note that the meter will have to be(re-)calibratedbyadjustingthepotentiometer. 

|**Required F.S.R.**<br>mV|**Ra**<br>N/A|**Rb**<br>N/A|**CAL**<br>Adj|
|---|---|---|---|
|200mV|N/A|N/A|Adjust|
|2V|910k|100k|j<br>Adjust|
|20V|1M|10k|djust<br>Adjust|
|200 A|0R|1k|Adjust<br>Adjust|
|2mA|0R|100R|Adjust<br>Adjust|
|20mA|0R|10R|Ad<br>Adjust<br>just|
|200mA|0R|1R|Adjust|



|**Adding an input filter and scaling resistors when T/BLK-4 is not used**|
|---|
|+<br>Ra<br>100k<br>IN HI<br>(Yellow/4)|
|INPUT<br>-<br>Rb<br>IN LO<br>(Green/5)<br>100nF<br>Note: To reduce noise on the meter's input, fit the input filter components (1M|
|and 10nF) shown above. The input filter is fitted as standard on T/BLK-4.|



**==> picture [255 x 232] intentionally omitted <==**

**----- Start of picture text -----**<br>
Connecting to T/BLK-4 Solder wires from EMV 1125<br>Pldddddddd<br>1<br>BK BR RD OR YL GR BL VI GY WT<br>Calibrationpotentiometer CAL L2 L1 DP 1 2 3 Decimal pointlinks<br>V- V+<br>“E" Rb O Ra s<br>La<br>S Oe Rb 8 So Ra we ee<br>| |<br>Scaling resistors (values for 2V and 20V FSD Supplied with T/BLK-4)<br>Note:  There are two locations for each scaling resistor (Ra and Rb) to allow for different types.<br>It is only necessary to fit a resistor in one of these locations.<br>Adding a calibration circuit when T/BLK-4 is not used V+<br>(Red/2)<br>100k<br>Vref<br>Note: The calibration circuit must always (Orange/3)<br>be fitted, even when scaling resistors are 3k<br>not fitted. This circuit is fitted as standard 1k5 R COM<br>on T/BLK-4. (Brown/1)<br>INHI INLO<br>**----- End of picture text -----**<br>


## **APPLICATIONS** 

Do not connect more than one meter to the same power supply if the meters cannot use the same signal ground. Taking any input beyond the power supply rails will damage the meter. Keep leads short to ensure noise-free operation. 

**==> picture [290 x 92] intentionally omitted <==**

**----- Start of picture text -----**<br>
1 1<br>BK BR RD OR YL GR BL VI GY WT BK BR RD OR YL GR BL VI GY WT<br>1 2 3 1 2 3<br>CAL L2 L1 DP CAL L2 L1 DP<br>V- V+ V- V+<br>Rb Ra Rb Ra<br>La La<br>Rb Ra Rb Ra<br>Rb = 0.2<br>I<br>Supply +200mV Supply Current to be<br>Voltage Input Voltage Voltage measured<br>INHI INLO INHI INLO<br>- + + - - + + -<br>**----- End of picture text -----**<br>


Measuring a floating voltage source of 200mV full scale. Add Ra and Rb and cut Link La to increase the measurement range. 

Measuring current. Recalibrate the module. The current to be measured must be isolated from the module's power supply. 

**==> picture [92 x 107] intentionally omitted <==**

**----- Start of picture text -----**<br>
1<br>BK BR RD OR YL GR BL VI GY WT<br>1 2 3<br>CAL L2 L1 DP<br>V- V+<br>Rb Ra<br>La<br>1 0 k 5 1 0 k<br>510k<br>Supply<br>Voltage<br>INHI INLO<br>- +<br>**----- End of picture text -----**<br>


Measuring a supply voltage. (min. 7.5V, max. 15V) Cut Links La and L2. Recalibrate the module. 

_**Specifications liable to change without prior warning**_ 

**EMV 1125 Issue 12 06/2010 IRCN 0539 S.L.** 

**Applies to EMV 1125/2**