DPM342

LED Backlit 4-20mA Loop Powered Indicator 

## DPM 342 

A compact loop powered indicator giving an accurate, zero corrected indication of 4-20mA loop current. Calibration is by two multi-turn potentiometers which allow sensitive adjustment of the instrument. The DPM 342 features an integral snap-in bezel, making installation easy. The module’s LED backlighting ensures a clear display, even under low light conditions. No soldering is required. Connection to the currentloopisviatwoscrewterminals.Thecorrectdecimalpointisselectedviaajumperlink. 

## **11mm (0.43“) Digit Height** 

- @ **Programmable Decimal Points** @ **Low Volt Drop Loop Powered LED Backlighting** eae 

- @ **Simple Screw Terminal Connections** 

   - **Wide Adjustment Range** 

   - **Auto-polarity on Display** 

**Stock Number Standard Meter DPM 342** es ~~asasasaseses~~ AccuracLinearitSamOTemLoo **Sp** p **ecification** eratinppp Volt Droerature sle rateyyg( temoverall errortabilitpperature rany ) * ge **Min.** 0.05 ~~eseseseseses~~ 05 **T** 2005.6 ~~es~~ **yp** ~~eseseseS~~ 3 ~~SS~~ **. Max.** ±10.150 ~~eseseSeS~~ 6 %sam(±1 countppcount **Unit** p°Cm/°CVles/sec) ~~SS as~~ Supply current 4 mA ~~es eS as~~ Full scale reading (20mA) 0 1999 Count ~~es ee~~ Offset adjustment range + (span x 0.25) ee -950 ee +950 ee Count ~~ee~~ *To ensure maximum accuracy, re-calibrate periodically. **CONNECTOR SOURCING GUIDE** ~~x_n~~ **METHOD Screw Terminals - No Connector Required** 

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DIMENSIONS All dimensions in mm (inches)<br>40.0 (1.57)<br>27.3 (1.07) a b c d a. 2.00 (0.08) Panel cut-out<br>b. 6.00 (0.24) 38.0 x 18.0 (1.50 x 0.71)<br>c. 1.60 (0.06) max<br>d. 9.50 (0.37) Panel1.0 tothickness2.5 (0.04 to 0.1)<br>/~_—______________» > =) |<br>ON BOARD JUMPER LINKS<br>[ C4 [FE -<br>REAR VIEW<br>LK1<br>10 0 10 0)<br>DP3<br>DP2<br>DP1<br>a — 4LID |Q_ _ 47[ID |O_<br>37.5 (1.48) + -<br>ee V<br>Calibration potentiometers<br>(0.79) (0.50)<br>20.0 12.7<br>(0.69)<br>CAL<br>17.5<br>OFF<br>**----- End of picture text -----**<br>


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

LASCAR ELECTRONICS LTD. MODULE HOUSE, WHITEPARISH, WILTSHIRE SP5 2SJ UK TEL: +44 (0)1794 884567 FAX: +44 (0)1794 884616 E-MAIL: sales@lascar.co.uk 

LASCAR ELECTRONICS INC. LASCAR ELECTRONICS (HK) LTD. 4258 WEST 12th STREET, 8th FLOOR, CHINA AEROSPACE CENTRE, 143 HOI BUN ERIE, PA 16505 USA ROAD, KWUN TONG, KOWLOON, HONG KONG TEL: +1 (814) 835 0621 FAX: +1 (814) 838 8141 TEL: +852 2389 6502 FAX: +852 2389 6535 E-mail: us-sales@lascarelectronics.com E-mail: saleshk@lascar.com.hk 

## TERMINAL FUNCTIONS 

1. + Positivecurrentinput. 

2. - Negativecurrentinput. 

## CALIBRATION 

The meter si suppeild cilabrated to read 000 for 4mA loop current and 1000 for 20mA. Calibration is carried out in two simple stages because the DPM 342 has a very wide adjustment range . Place the jumper link across LK1. This disables the offset adjustment to enable span adjustment to be made first. After span adjustment is complete, the jumper link is removed and the offset adjustment is made. The jumper link is then used to display one of the decimalpointsifnecessary. 

Exampletore-calibrate:Metertoread-40.0for4mAand150.0for20mA. 

1. Calculatethespanbysubtractingthedesiredreadingat4mAfromthedesiredreadingat20mA: 1500-(-400)=1900 

2. ShortjumperlinkLk1withthelinkheadernormallyusedtoselectthedesiredDecimalPoint. LinkLk1islocatedabovethescrewterminals. 

3. Apply16mAbetweenthe+and-screwterminals. 

4. AdjusttheCALpotentiometersotheDPM342indicates1900. 

5. RemovejumperlinkLk1andplaceitbackonthedesiredDecimalPoint(DP1inthiscase). 6. Apply4mAbetween the-and+screwterminals. 

7. AdjusttheOFFpotentiometersotheDPM342indicatesthedesiredreadingat4mA: -40.0 

8. AdjustCALandOFFasnecessaryforoptimumaccuracy,byrepeatingsteps2to7. 

## **SAFETY** 

The user must ensure that the incorporation of the DPM into the user’s equipment conforms to the relevant sections of BS EN 61010 (Safety Requirements for ElectricalEquipmentforMeasuring,ControlandLaboratoryUse). Noinputsotherthan4-20mAindicatingloopcurrentshouldbemade. 

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JUMPER LINKS: In order to quickly and easily select the CURRENT LOOP CONNECTION: The DPM 342 and<br>requiredDecimalPoint,themeterhasseveralon-boardjumperlinks. its backlighting are powered from the 4-20mA signal loop and need no<br>otherpowersupply. Ensurecorrectpolaritywhenconnecting.<br>DP3 DP3 DP3 I+ +<br>4-20mA DPM 342<br>DP2 DP2 DP2 Transmitter<br>I- -<br>DP1 DP1 DP1<br>Connecting the DPM 342 to a 4-20mA Current Loop.<br>**----- End of picture text -----**<br>


PANEL FITTING Locate the meter by passing it through the front of the panel cut-out and gently push until the rear of the bezel is flush with the panel (DO NOT PUSH ON THE LCD). The snap-in lugs will now automatically hold the meter firmly in position. Take care when inserting the meter, not to damage the current loop wires and not to short them on the panel. 

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

DPM 342 Issue 7 01/2019 S.L. Applies to DPM 342/1 

Disclaimer: 

Every effort has been made to ensure the accuracy of this publication and no responsibility or liability can be accepted by Lascar Electronics Limited for any errors or omissions in the content of this document. Data and legislation may change, and so we strongly advise you to obtain and review the most recently issued regulations, standards, and guidelines. This publication does not form the basis of a contract. © 2019 Lascar Electronics Limited