DPM125-BL

3½ Digit LCD Module 

## DPM 125-BL 

This compact LCD DPM uses advanced components and construction techniques to provide an unrivalled combination of high performanceandlowcost. Forpoorvisibility,alonglifeLEDbacklightisfitted. 

- **12.5mm (0.5“) Digit Height** 

- **Logic Selectable Decimal Points** 

- **Auto-zero** 

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- **Auto-polarity** 

- **200mV d.c. Full Scale Reading (F.S.R.)** 

- **LED Backlighting** 

## **SCALING** 

## **Stock Number** 

Two resistors may be used to alter the full scale reading of themeter-seetable. 

themeter-seetable. **Standard Meter DPM 125-BL** The meter will have to be re-calibrated by adjusting thecalibrationpotentiometer.calibrationpotentiometer. es ~~e~~ Accurac **Specification** y (overall error)  Min.** ~~ese~~ ~~**s**~~ **T** 0.05 **yp. Max.** 0.1 % (±1 count **Unit** ) Linearity ±1 count Ra ~~ee~~ Sample rate 3 samples/sec + IN HI (7) Operating temperature range ~~ee~~ 0 ~~ee ee~~ 50 °C Temperature stability 100 ppm/°C INPUT Rb Supply voltage (V+ to V-)* 7.5 9 14 V - IN LO (8) Supply current* 150 A Input leakage current (Vin = 0V) 1 10 pA Backlight voltage 7.5 9 10 V **Required F.S.R. Ra Rb** ~~———————————~~ Backlight current 30 60 mA 2V20V 910k1M 100k10k * Excluding Backlight 200V 1M 1k ** To ensure maximum accuracy, re-calibrate periodically. 2kV * 10M 1k 200 A 0R 1k **CONNECTOR SOURCING GUIDE** 2mA 0R 100R **METHOD FARNELL MOLEX PANDUIT RS SAMTEC** 20mA 0R 10R PCB socket 103-963 188-2796 SS SERIES ~~=a~~ 200mA 0R 1R ~~eee~~ IDC 429-508 38-00-2102 CE 100 F28-12 188-2796 HCSS SERIES *Ensure Ra is rated for high voltage use. **DIMENSIONS All dimensions in mm (inches)** 48 (1.89) a b a. 1.50 (0.06) 31.0 (1.22) b. 9.00 (0.35) c. 10.4 (0.41) d. 7.50 (0.30) e. 2.54 (0.10) f. 0.50 (0.02) g. 5.00 (0.20) h. 1.60 (0.06) i. 2.50 (0.10) j. 8.25 (0.32) Viewing Area showing Panel cut-out display in TEST mode 45 x 22.2 (1.77 x 0.87) i 40.5 (1.59) h 38.0 (1.50) g ~~—————w~~ **REAR VIEW ON BOARD SOLDER LINKS LK1 LK2** ~~a~~ **12 1** ~~f~~ j ~~oo~~ **12 1** d e f 

The meter will have to be re-calibrated by adjusting thecalibrationpotentiometer.calibrationpotentiometer. 

## **PANEL FITTING** 

Fit the bezel to the front of the panel and then locate the meter into the bezel from behind. Alternatively the meter and bezel may be assembled before fitting into the front of the panel but care must be taken not to use excessive force. Finally fit the window into the front of the bezel. 

**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** 

## **PIN FUNCTIONS** 

1. DP1 199.9 

2. DP2 19.99 ConnecttoV+todisplayrequiredDP. 

3. DP3 1.999 

4. TEST ConnecttoV+todisplaysegmentsasillustrated. ItshouldnotbeoperatedformorethanafewsecondsastheD.C.Voltageapplied totheLCDmay'burn'thedisplay. Thispinisnormallyat5VbelowV+andisthegroundforthedigitalsectionofthemeter.Itcanbe usedtopowerexternallogicuptoamaximumof1mA. 

5. V- Negativepowersupplyconnection. 

6. V+ Positivepowersupplyconnection. 

7. INHI Positivemeasuringdifferentialinput. 

8. INLO Negativemeasuringdifferentialinput. 

   - Analogueinputsmustbenocloserthan1Vtoeitherthepositiveornegativesupply. 

9. COM ThegroundfortheanaloguesectionoftheA/Dconverter,heldactivelyat2.8V(nom.)belowV+. COMmustnotbeallowedtosink excessivecurrent(>100 A)byconnectingitdirectlytoahighervoltage. 

10. REFLO Negativeinputforreferencevoltage. 

11. RHI Positiveinputforreferencevoltage(connectedviaLink1toROH). 

12. ROH Positiveoutputfrominternalreference. 

13. LMPNegativebacklightpowersupplyconnection. 

14. LMP+ Positivebacklightpowersupplyconnection. 

## **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 equipment conforms to the relevant sections of BS EN 61010 (Safety Requirements for Electrical Equipment for Measuring,ControlandLaboratoryUse). 

## **VARIOUS OPERATING MODES** 

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ON-BOARD LINKS: In order to quickly and easily change operating modes for Normally<br>different applications, the meter has several "on-board links". They are designed NormallySHORTED OPENSolder to<br>to be easily cut (opened) or shorted (soldered). Cut to SHORT<br>Do not connect more than one meter to the same power supply if the meters cannot OPEN<br>use the same signal ground. Taking any input beyond the power supply rails will<br>damage the meter.<br>V+ V+ +5V<br>6 IIN 6 6<br>V+ 7 V+<br>+ 7 IN HI 220K IN HI INPUT + 7 IN HI<br>- 1 1089 COMREF LOIN LOV-5 V- 6R2IOUT 0 5K SETZERO1098 IN LOREF LOCOMV-5 V- VOLTAGE10 F +- 2 42 7660V+- 5 83+ - 810IN LOF V-REFLO5COM 109<br>Measuring a floating voltage Measuring 4-20mA to read 0-999 Measuring a single ended input<br>source of 200mV full scale. (supply MUST be isolated). reference to supply ground.<br>V+ V+<br>6 6<br>7 IN HIV+ + 7 IN HIV+<br>R V1 - 8 IN LO<br>8<br>IN LO<br>9 11<br>COM + REF HI<br>R= I [0.2] FSR 10 REF LO V2 - 10 REF LO<br>V- V-<br>d 5 V- o g 5 V-<br>Check Links 1 & 2 are OPEN.<br>Measuring current. Supply MUST Measuring the ratio of two voltages.<br>be isolated. Reading = 1000 V1/V2<br>50mV< V2<200mV<br>V1<2V2.<br>Specifications liable to change without prior warning DPM 125-BL Issue 9 06/2010 S.L. Applies to DPM 125-BL/3<br>**----- End of picture text -----**<br>


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