EM32-1B-LED

EM32-1B-LED 

Round Hole Mounting LED Voltmeter 

## **PRODUCT DESCRIPTION** 

The EM32-1B-LED is a 3 ½ digit LED voltmeter which is designed to be panel mounted in most low and medium volume applications. The meter features 8mm digit height, 3 decimal points, auto-polarity, auto-zero, 200mV full scale reading and a low current consumption. This product is designed so no soldering is required. Connection is via screw terminals, and options are selected via jumper links. The module features a round metal bezel, requiring a 32.5mm (1.28") diameter cut-out. It is secured with the nut provided. Protection from the front to IP 67 /NEMA4Xstandardsisachievedbyplacingtherubbersealbetweenthemoduleandpanelduringassembly. 

## **FEATURES** 

- 8mm (0.31") Digit Height 

- 200mV d.c. Full Scale Reading 

- 50mA @ 5Vd.c. Operation 

- Auto-zero and Auto-polarity 

- • Selectable Decimal Points • Requires 32.5mm (1.28") Diameter Cut-out 

- IP67 / NEMA 4X Protected 

## **TYPICAL APPLICATIONS** 

- Panel Mount Instrumentation 

- Process & Control 

- Automotive 

## **ORDERING INFORMATION** 

Stock Number Standard Meter **EM32-1B-LED** 

## **ELECTRICAL SPECIFICATIONS** 

|**Specification**|**Min.**<br>~~**S**S~~|**Typ.**<br>~~SS SE~~|**Max.**<br>~~SE~~|**Unit**<br>~~(SS~~|
|---|---|---|---|---|
|Accuracy (overall error) *<br>~~ES~~|~~ES~~<br>~~**S**S~~|0.1<br>~~ES~~<br>~~SS SE~~<br>~~ES~~|~~ES~~<br>~~SE~~<br>~~(S~~|%(±1 count)<br>~~ES~~<br>~~(SS~~<br>~~(S~~|
|Linearity<br>~~E~~|~~**S**S~~<br>~~E~~<br>~~ES SS~~|~~SS SE~~<br>~~ES~~<br>~~SS~~|1<br>+<br>~~SE~~<br>~~(S~~<br>~~(SS~~|count<br>~~(SS~~<br>~~(S~~<br>~~(SS~~|
|y<br>Sample rate<br>~~E~~<br>~~eS~~|~~E~~<br>~~eS~~<br>~~ES SS~~|2.5<br>~~ES ~~<br>~~eS~~<br>~~SS~~|~~(S~~<br>~~eS~~<br>~~(SS~~|samples/sec<br>~~(S~~<br>~~eS~~<br>~~(SS~~|
|Operatingtemperature range<br>~~ee~~|0<br>~~ES SS~~<br>~~ee~~|~~SS ~~<br>~~ee~~|50<br> ~~(SS~~<br>~~ee~~|°C<br>~~(SS~~<br>~~ee~~|
|Temperature stability<br>~~SS~~<br>~~SS~~|~~SS~~<br>~~SS~~|150<br>~~SS~~<br>~~SS~~|~~(~~<br>~~(S~~|ppm/°C<br>~~(~~<br>~~(S~~|
|Warm-uptime<br>~~SS~~<br>~~SS~~|~~SS~~<br>~~SS~~|10<br>~~SS~~<br>~~SS~~|~~(S~~<br>~~(SO~~|minutes<br>~~(S~~<br>~~(SO~~|
|Supplyvoltage (V+ to V-)<br>~~SS~~<br>~~SS~~|4.75<br>~~SS~~<br>~~SS~~|5<br>~~SS ~~<br>~~SS~~|5.25<br> ~~(S~~<br>~~(SO~~|V d.c.<br>~~(S~~<br>~~(SO~~|
|Supplycurrent<br>~~SS~~<br>~~eS~~|~~SS~~<br>~~eS~~<br>~~SS~~|50<br>~~SS ~~<br>~~eS~~<br>~~SS~~|100<br> ~~(SO~~<br>~~eS~~|mA<br>~~(SO~~<br>~~eS~~|
|Input leakage current (Vin = 0V)<br>~~eS~~|~~eS~~<br>~~SS~~|1<br>~~eS~~<br>~~SS~~|10<br>~~eS~~|pA<br>~~eS~~|



** Operation of the meter beyond the maximum supply voltage rating may cause permanent damage to the meter. 

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

## **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 panel meter into the user’s equipment conforms to the relevant sections of BS EN 61010 (Safety Requirements for Electrical Equipment for Measuring, Control and LaboratoryUse). 

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LASCAR ELECTRONICS LTD. LASCAR ELECTRONICS INC. LASCAR ELECTRONICS (HK) LTD.<br>MODULE HOUSE, 4258 WEST 12th STREET, 8th FLOOR, CHINA AEROSPACE CENTRE,<br>WHITEPARISH, ERIE, 143 HOI BUN ROAD,<br>WILTSHIRE SP5 2SJ, PA 16505, KWUN TONG, KOWLOON,<br>UK USA HONG KONG<br>TEL: +44 (1794) 884567 TEL: +1 (814) 835 0621 TEL: +852 2389 6502<br>FAX: +44 (1794) 884616 FAX: +1 (814) 838 8141 FAX: +852 2389 6535<br>E-mail: sales@lascar.co.uk E-mail: us-sales@lascarelectronics.com E- mail: saleshk@lascar.com.hk<br>Specifications liable to change without prior warning EM32-1B-LED Issue 6 06/2010 S.L. Applies to EM32-1B-LED/1<br>**----- End of picture text -----**<br>


EM32-1B-LED 

Round Hole Mounting LED Voltmeter 

## **DIMENSIONS** 

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All dimensions in mm (inches) 15.0 (0.59) 23.5 (0.93)<br>5.5 (0.22)<br>1.5 (0.06) 3.0 (0.12)<br>Sy 1.7 (0.07) q | v<br>Panel cut-out<br>PANEL MOUNTING<br>o 1 . e 2 | | @ 3 | | @ 4<br>FUNCTIONAL BLOCK DIAGRAM CONNECTIONS (rear view)<br>V+<br>RHI<br>Vref<br>COM CAL J1 oo oo J2<br>J1 : RLO Bo  95199<br>. ILO a 5<br>CAL<br>A/D<br>+ [_] 1 8<br>pst Ha ga — RB RA<br>IHI<br>V+ V- DP 3 2 1<br>J2<br>ILO IHI V+ V-<br>Specifications liable to change without prior warning EM32-1B-LED Issue 6 06/2010 S.L. Applies to EM32-1B-LED/1<br>Page 4 of 4<br>www.lascarelectronics.com No: 716 - Page 2 of 4<br>qLascaR——_—ss<br>32.5<br>(1.28)<br>ILO IHI V+ 0V<br>38.0 (1.5) 32.0 (1.26)<br>**----- End of picture text -----**<br>


EM32-1B-LED 

Round Hole Mounting LED Voltmeter 

## **CIRCUIT DIAGRAM** 

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V+<br>IHI | — Ra | — —— Aint V a R PO L dr = 8 PO L | R71k5<br>ILO Rb < = ea 3 sc Eq 4moon/ ot 2a MAX140 Sas? e eo8 5e eeietttlEotd DP1, DP2, DP3ANODE<br>J2 J1 aesag S H C© RREF+ EF 5egbe 5 e2S  er22)aus ? 45<br>8 Re erEF HI L a F 6 2D feHeeare set<br>0V [a3) cap.GND 2353.2  4be}f a x 153d 8S3 DISPLAY ope<br>C61u5 C61u5 APs F 8e 3d [220ESFe bet DP3<br>A L isaSF<br>V - DGND<br>21<br>V +<br>R4<br>100k<br>R5<br>3k0<br>R6<br>1k0<br>**----- End of picture text -----**<br>


## **SCREW TERMINAL FUNCTIONS** 

0V Negativepowersupplytothemeter. V+ Positivepowersupplytothemeter(+5Vnom). IHI Positivemeasuringinput. 

IHImustbenocloserthan1.5Vtoeitherthepositiveortheinternalnegativesupply. ILO Negativemeasuringinput. 

ILOmustbenocloserthan1.5Vtoeitherthepositiveortheinternalnegativesupply. 

## Note: 

Internal negative supply. This is generated from the supply voltage between V+ and 0V, and is negative withrespectto0V. For example: if V+ = +5V (with respect to 0V), then the allowable common mode input range is from (V+-1.5V)to(V-+1.5V)orfrom3.5Vto-3.5Vwithrespecttothe0Vpowersupplyconnection. 

## **JUMPER LINKS** 

J1 ConnectsILOtoCOM,whenjumperlinkisfitted. J2 Connects ILOto0V,whenjumperlinkisfitted. 

_**Specifications liable to change without prior warning**_ **EM32-1B-LED Issue 6 06/2010 S.L. Applies to EM32-1B-LED/1** 

EM32-1B-LED 

Round Hole Mounting LED Voltmeter 

## **SCALING** 

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Two resistors Ra and Rb may be<br>used to alter the full scale reading<br>(FSR) of the meter - see table. Cut<br>the PCB track across Ra before<br>fitting Ra. The meter will have to Ra<br>be re-calibrated by adjusting the + IHI<br>calibration potentiometer on the<br>rearofthemodule. Vin or Iin Rb EM32-1B-LED<br>FSR Ra Rb - ILO RA<br>2V 910k 100k<br>Voltage 20V 1M 10k RB<br>Vin 200V 1M 1k<br>2000V* 1M 100R<br>200 A 0R 1k<br>Current 2mA 0R 100R<br>Cut the PCB track across Ra<br>Iin 20mA 0R 10R beforefittingRa.<br>200mA 0R 1R<br>*Ensure that Ra is rated for high voltage use.<br>“|<br>Must use external scaling resistors (Do not cut track across Ra).<br>©<br>APPLICATIONS<br>Do not connect more than one meter to the same power supply if the meters cannot use the same signal<br>ground. Takinganyinputbeyondthepowersupplyrailswilldamagethemeter.<br>**----- End of picture text -----**<br>


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+4.75 to +5.25V +4.75 to +5.25V +4.75 to +5.25V<br>V+ V+ V+<br>+ IHI + IHI IHI<br>±200mV R<br>- ILO ILO<br>R = 0.2<br>0V 0V 0V<br>0V 0V IFSR 0V<br>Measuring an input voltage referenced Measuring a single ended input Measuring current.<br>to a floating supply, i.e. the input voltage referenced to supply, i.e. the The meter's supply is isolated<br>voltage and the meter's power supply input voltage and the meter's power from the current being measured.<br>are isolated from each other. supply share the same 0V rail. Ensure Jumper link J1 is fitted.<br>Ensure Jumper link J1 is fitted. Ensure Jumper link J1 is not fitted. Ensure Jumper link J2 is not fitted.<br>Ensure Jumper link J2 is not fitted. Ensure Jumper link J2 is fitted.<br>**----- End of picture text -----**<br>


_**Specifications liable to change without prior warning**_ **EM32-1B-LED Issue 6 06/2010 S.L. Applies to EM32-1B-LED/1**