DPM942

DPM 942 

4-20mA Loop Powered Indicator 

_eeei No.:695 - Page 1 of 2 

**A loop powered indicator giving an accurate, zero corrected indication of 4-20mA loop current. Calibration is by two 20-turn cermet potentiometers which allow sensitive adjustment of the instrument. The meter is housed in a robust carrier, which can be bolted in placeorpanelmountedusingthelowprofilebezelandclipsprovided.** 

- **19mm (0.75“) Digit Height** 

- **Programmable Decimal Points** 

- **Low Volt Drop** 

- **Simple Screw Terminal Connections** 

## **CUSTOM SCALING** 

**For alternative scaling to the standard 0 - 1000, cut Link 8 and short Link 7. Add two resistors R12 and R13 which will set the basic scale of the meter. The highest practical value for the R12 and R13 series combination is 12R. To selectyourdesiredscaling,usethefollowingformula: R12+R13= FullScalereadingat20mA** 

|**Specification**|**Min.**|**Typ.**|**Max.**|**Unit**|
|---|---|---|---|---|
|Accuracy (overall error)*|0.05||0.1|%(±1 count)|
|ytir<br>a<br>e<br>niL|||1<br>±|t<br>n<br>u<br>o<br>c|
|eta<br>r<br>elp<br>m<br>a<br>S||3||c<br>e<br>s/s<br>elp<br>m<br>a<br>s|
|Operatingtemperature range|0||50|°C|
|pgpg<br>s<br>e<br>r<br>u<br>ta<br>r<br>e<br>p<br>m<br>e<br>T<br>tability||0<br>0<br>1||C<br>°/<br>m<br>p<br>p|
|p<br>o<br>r<br>D<br>tlo<br>V<br>p<br>o<br>o<br>L|9<br>.<br>3|3<br>.<br>4|8<br>.<br>4|V|



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160<br>niLeatiry ±1 count<br>Sampel reta 3 sampels/sec<br>Operating temperature range 0 50 °C<br>Tempertaure stability 100 ppm°/C<br>Loop Vtlo Drop 3.9 4.3 4.8 V<br>R25<br>*To ensure maximum accuracy, re-calibrate periodically.<br>R14<br>R13<br>R12<br>CONNECTOR SOURCING GUIDE<br>R11<br>METHOD Screw Terminals - No Connector Required<br>swig Sy at =<br>Top right hand corner of the pcb.<br>**----- End of picture text -----**<br>


**Re-calibrateasnecessary.** 

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

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Panel cut-out 72 x 40 (2.83 x 1.57)<br>Maximum panel thickness 3mm (0.12).<br>76.0 (2.99) a<br>72.5 (2.85)<br>a. 1.0 (0.04)<br>b. 2.0 (0.08)<br>c. 6.5 (0.26)<br>d. 11.5 (0.45)<br>e. 12.5 (0.49)*<br>*typical depth of tallest component behind PCB,<br>[ CI [ this dimension is for guidance only.<br>51.0 (2.01)<br>b c<br>61.5 (2.42)<br>51.0 (2.01) d e<br>a fae SSE (0.22)Ø5.7 I OFFSET SPAN<br>REAR<br>7G VIEW<br>& 1<br>6 5 7 8 2<br>10 3<br>9 4<br>© @ seas"<br>Ø3.0<br>71.5 (2.81) (0.12)<br>ON BOARD<br>Yd LJ SOLDER LINKS<br>Specifications liable to change without prior warning DPM 942 Issue 9 04/2019   Applies to DPM 942/3<br>)(137. )(195. )(904.<br>044. 045. 204.<br>)(145. )(904. )(690.<br>930. 204. 245.<br>1 2 3<br>S P P P - +<br>D D D D I I<br>**----- End of picture text -----**<br>


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

**LASCAR ELECTRONICS LTD. LASCAR ELECTRONICS INC. LASCAR ELECTRONICS (HK) LTD. MODULE HOUSE, WHITEPARISH, 4258 WEST 12th STREET, 8th FLOOR, CHINA AEROSPACE CENTRE, 143 HOI BUN WILTSHIRE SP5 2SJ UK ERIE, PA 16505 USA ROAD, KWUN TONG, KOWLOON, HONG KONG TEL: +44 (0)1794 884567 FAX: +44 (0)1794 884616 TEL: +1 (814) 835 0621 FAX: +1 (814) 838 8141 TEL: +852 2389 6502 FAX: +852 2389 6535 E-MAIL: sales@lascar.co.uk E-mail: us-sales@lascarelectronics.com E-mail: saleshk@lascar.com.hk** 

## **TERMINAL FUNCTIONS** 

|**1. **|**I+**|**Positivecurrentinput.**|
|---|---|---|
|**2. **|**I-**|**Negativecurrentinput.**|
|**3. **<br>**4. **<br>**5. **|**DP3**<br> **DP2**<br> **DP1**|**1.000**<br>**10.00**<br>**Decimalpointinputs.**<br>**100.0**<br>~~I~~|
|**6. **|**DS**|**DecimalPointselect. ConnecttorequiredDPinputtodisplaydecimalpoint.**|



## **CALIBRATION** 

**Themeterissuppliedcalibratedtoread000for4mAloopcurrentand1000for20mA. Tore-calibrate:** 

**1. Apply4mAtoI+/I-andadjust'OFFSET'toread000.** 

**2. Apply20mAandadjust'SPAN'toread1000.** 

**3. Repeat steps 1 and 2 until there is no more adjustment of 'SPAN' and 'OFFSET' required to give desired readings.** 

## **SAFETY** 

**To comply with the Low Voltage Directive (LVD 93/68/EEC), input voltages to the module’s pins must not exceed 60Vdc. If voltages to the measuring inputs do exceed 60Vdc, then fit scaling resistors externally to the module. The user must ensure that the incorporation of the DPM into the user’s equipmentconformstotherelevantsectionsofBSEN61010(SafetyRequirementsforElectricalEquipmentforMeasuring,ControlandLaboratoryUse).** 

## **VARIOUS OPERATING MODES** 

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ON-BOARD LINKS: In order to quickly and easily change operating modes for Normally Normally<br>different applications, the meter has several "on-board links". They are designed SHORTED OPEN<br>Cut to Solder to<br>to be easily opened (cut) or shorted (soldered). OPEN SHORT<br>The DPM 942 is powered from the 4-20mA signal loop and needs no other power<br>supply. Ensure correct polarity when connecting.<br>**----- End of picture text -----**<br>


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I+ 1 4<br>I+ DP2<br>4-20mA DP2 selected in this example.<br>Transmitter DPM 942<br>I- 2 6<br>I- DS<br>**----- End of picture text -----**<br>


## **PANEL FITTING** 

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

**DPM 942 Issue 9 04/2019** 

**Applies to DPM 942/3**