DPM 160

DPM 160 

4½ Digit LCD Module 

A DPM offering levels of performance, low current consumption and compact size never previously available. Automatic low battery indication and 'continuity' flags are built into the display. Supplied complete with snap-in bezel, the DPM 160 will suit many applicationscallingforlowcost,highaccuracymeasurementsinportableinstruments. 

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**12.5mm (0.5“) Digit Height.** 

**Programmable Decimal Points** 

**Auto-zero** 

**Auto-polarity** 

**200mV d.c. or 2V d.c. Full Scale Reading (F.S.R.)** 

**Digital Hold** 

**Single Rail Version (DPM 160S)** 

## **Autoranging Outputs** 

|**Stock Number**<br>**Standard Meter**<br>**DPM 160**<br>**Single Rail Version**<br>**DPM 160S**|**Stock Number**<br>**Standard Meter**<br>**DPM 160**<br>**Single Rail Version**<br>**DPM 160S**|**Stock Number**<br>**Standard Meter**<br>**DPM 160**<br>**Single Rail Version**<br>**DPM 160S**|**Stock Number**<br>**Standard Meter**<br>**DPM 160**<br>**Single Rail Version**<br>**DPM 160S**|**Stock Number**<br>**Standard Meter**<br>**DPM 160**<br>**Single Rail Version**<br>**DPM 160S**|**Stock Number**<br>**Standard Meter**<br>**DPM 160**<br>**Single Rail Version**<br>**DPM 160S**|
|---|---|---|---|---|---|
|**Specification**||**Min.**|**Typ.**|**Max.**|**Unit**|
|Accuracy (overall error) *|||0.005|0.01|% (±1 count)|
|Linearity||||±1|count|
|Sample rate|||1.6||samples/sec|
|Operating temperature range||0||50**|°C|
|Temperature s<br>tability|||30||ppm/°C|
|Supply<br>(V+ to V-)<br>voltage|DPM 160|6|9|14|V|
||DPM 160S|3|5|7||
|Supply current|||1||mA|
|Input leakage current|(Vin= 0V)||1|10|pA|



## **SCALING** 

Two resistors Ra and Rb may be fitted in order to alter the fullscalereading(F.S.R.)ofthemeter-seetable. Themeterwillneedre-calibration. 

|**Required F.S.R.**|**Required F.S.R.**|**Range Input**|**Ra**|**Rb**|
|---|---|---|---|---|
|200mV||LOW (o/c)|Link|(o/c)|
|2V||HIGH|Link|(o/c)|
|20V<br>Note||HIGH|910k|100k|
|200V<br>Note||HIGH|1M|10k|
|2kV<br>Note||HIGH|1M|1k|
|200 A<br>µ||LOW(o/c)|Link|1k|
|2mA||LOW(o/c)|Link|100R|
|20mA||LOW(o/c)|Link|10R|
|200mA||LOW(o/c)|Link|1R|



* To ensure maximum accuracy, re-calibrate periodically. 

- **Above typically 35°C the display’s viewing angle will progressively reduce, although contrast should remain acceptable when viewed head-on. 

## **NOTE** 

EnsurethatLinkLaisopeniffittingRa. 

## **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). 

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

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1.10 8.20<br>60.0 (2.36) (0.04) (0.32)<br>Panel cut-out<br>57 x 27 (2.24 x 1.06)<br>6.7 8.00<br>(0.26) (0.33)<br>52.0 (2.05)<br>REAR VIEW<br>ON BOARD<br>SOLDER LINKS<br>SCALING RESISTORS<br>Rb<br>1 Ra<br>La<br>1 20 1 4 2 3 20<br>2.54 (0.10) 0.50 (0.02)<br>(1.18)<br>30.0<br>)(1.00<br>DISP BG LO HI HI LO 25.0<br>DP4/OR V DP3/UR L/H V- V+ REF- REF REF+ COM CONT IN IN REF REF DGND RANGE DP2 DP1 CLOCK<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. 

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

**LASCAR ELECTRONICS INC. LASCAR ELECTRONICS (HK) LIMITED 3750 West 26th Street, FLAT C, 5/FL., LUCKY FTY. bldg., 63-65 HUNG TO ROAD Erie, PA 16506 USA KWUN TONG, KOWLOON, HONG KONG FAX: +1 (814) 838 8141 TEL: +852 2797 3219 FAX: +852 2343 6187 E-mail: us-sales@lascarelectronics.com E-mail: b4lascar@samsongroup.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** 

## **PIN FUNCTIONS** 

Notethat'HI'meansV+(6)and'LO'meansDGND(16). Fourofthepinsareinput/output,featuring'weak' outputs. Touseitasaninput,theoutputiseasilyoverdriven. Inordertoobtaintheoutputdata,thepin mustbeconnectedtoahighimpedanceinput. 

1. DP4/OR **Input:** WhenpulledHI,DP1.9999willbeshown. IfDP4isnottobeused,connectitLO. **Output:** TheoutputwillgoHIiftheresultexceeds±19999. **Note:** IfDP4istobeshownandtheO/Rsignalistobesensedatthesametime,Pin1should beusedasaninputundernormalconditionsexceptduringL/HoutputwhentheO/Rflag shouldbesensed. 

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WEAK OUTPUT<br>DP4/OR (1)<br>DP3/UR (3) 500k<br>LATCH/HOLD (4)<br>CONTINUITY (11)<br>**----- End of picture text -----**<br>


2. VDISP Thisinputsetsthedrivevoltageforthedisplay. ItisinternallylinkedtoDGND. 3. DP3/UR **Input:** WhenpulledHI,DP19.999willbeshown. IfDP3isnottobeused,connectitLO. **Output:** TheoutputwillgoHIiftheresultislessthan±1000. **Note:** IfDP3istobeshownandtheU/Rsignalistobesensedatthesametime,Pin3shouldbegatedwiththeL/Hasdescribedbelow. 

4. L/H **Input:** Whenfloating,theconverteroperatesinthefree-run(normal)mode. WhenpulledHI,thelastdisplayedreadingisheld. **Output:** Anegativepulseoccurswhenthedatainthedisplaylatchesisupdated. 

5. V- Negativepowersupply. 6. V+ Positivepowersupply. 

7. REFNegativesupplyfortheinternalreference. 

8. REFBG Outputofthebandgapreference(1.22Vnom). 

9. REF+ Positiveoutputfrominternalreference. 

10. COM ThegroundfortheanaloguesectionoftheA/Dconverter. Heldactivelyat3.2V(nom.)belowV+. 

11. CONT Iftheconverterinputvoltagedropsbelowanominal200mV,thenthecontinuityannunciatorwillbeshownandtheoutputwill beHI. Todisablethecontinuityindicator,pin11shouldbeheldLO. 

12. INLO Negativedifferentialmeasuringinput. Inputsmustbelowerthan1.0VbelowV+,andhigherthan1.5VaboveV-. 

13. INHI Positivedifferentialmeasuringinput. 14. REFHI Positiveinputforreferencevoltage. 

15. REFLO Negativeinputforreferencevoltage. 

16. DGND DGNDisheldatbetween4.6and6voltagebelowV+. Thisisthesupplyvoltageforthedigitalsection. IfCMOSlogicisusedto provideordecodeDPM160signals,thenitcanbepoweredfromV+andDGNDuptoamaximumof1mA. 

17. RANGE Thispinhasaninternal3mApulldownandneednotbeconnectedfora200mVfullscale. For2VfullscaleconnectHI. 18. DP2 InputforDP199.99 Thesepinshaveaninternal3 µ Apulldownandneednotbeconnectedifthedecimalpointsarenottobe 19. DP1 InputforDP1999.9 shown. Toshowthepoints,connecttoHI. 20. CLOCK ThisinputcanbeusedtooverridetheinternalclockinordertosynchroniseDPM160withexternalsystems. 

## **VARIOUS OPERATING MODES** 

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VARIOUS OPERATING MODES<br>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>to be easily opened (cut) or shorted (soldered). Do not connect more than one meter Cut to Solder to<br>to the same power supply if the meters cannot use the same signal ground. OPEN SHORT<br>Taking any input beyond the power supply rails will damage the meter.<br>6 V+ V+ 6 6 V+<br>V+ 13 V+ V+<br>+ IN HI<br>INPUT + 13 IN HI ±200mV - 12 IN LO 14V max7V min + 13 IN HI<br>VOLTAGE - 12 IN LO INPUT 12 IN LO<br>0V VOLTAGE<br>V- 1.5V V- V-<br>5 V- min. 5 V- 5 V-<br>Check Links 1, 2, 3 & 4 are SHORTED Check Links 1, 3 & 4 are SHORTED. Check Links 1, 3 & 4 are SHORTED.<br>Measuring a floating voltage source Split supply operation (DPM 160). Measuring a single ended input<br>of 200mV full scale. referenced to supply (DPM 160S).<br>6 V+ 6 V+ V+ 6 4013 +<br>+ 13 IN HIV+ + 13 IN HIV+ V+ DP4O/R 1 LATCH CK4016 O/RO/P<br>V1 12<br>- R=RI - [0.2] FSR 12 IN LOV-5 V- V2 +-- 1514 REF HIREF LOIN LOV-5 V- V-5 DGNDDP3U/RL/H1643 DP4DP3 I/PI/P LATCHOPTIONALPULSEMONOSTABLECKDELAY U/RO/P<br>Check Links 1, 2, 3 & 4 are SHORTED V-<br>Check Link REF is SHORT.<br>Measuring current. Measuring the ratio of two voltages. Driving DP3 and DP4 inputs while<br>Supply MUST be isolated. 200mV F.S.R. reading = 105 V1/V2 monitoring under range and over<br>2V F.S.R. reading = 10 [4] V1/V2. range outputs.<br>**----- End of picture text -----**<br>


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

**May/2003** 

**Applies to DPM 160/5** 

**M.C.** 

**DPM 160** 

**Issue 7**