DPM500-BL

DPM 500-BL 

3½ Digit Backlit LCD Module 

The DPM 500-BL uses advanced components and construction techniques to provide a uniquely compact unit. The meter is in a 40 pin DIL integratedcircuitformatthatcanbepluggeddirectlyintoaDILsocketorpanelmountedusingthesnapinbezel. 

- **12.5mm (0.5“) Digit Height** 

- **Programmable Decimal Points** 

- **Auto-zero** 

- **Auto-polarity** 

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

- **LED Backlit** 

- **Annunciators** 

**==> picture [306 x 122] intentionally omitted <==**

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- [+] °C°F<br>µ A<br>mV<br>k Ω<br>MHz<br>**----- End of picture text -----**<br>


## **SCALING** 

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

|**Required F.S.R.**|**Required F.S.R.**|**Ra**|**Rb**|
|---|---|---|---|
|<br>2V|<br>Note|910k|100k|
|20V|Note|1M|10k|
|200V|Note|1M|1k|
|2kV|Note|1M|100R|
|200 A<br>µ||0R|1k|
|2mA<br>||0R|100R|
|20mA||0R|10R|
|200mA||0R|1R|



**NOTE** 

Ensurelink10iscutiffittingRa. 

|**Stock Number**<br>**Backlit Version**<br>**DPM 500-BL**|**Stock Number**<br>**Backlit Version**<br>**DPM 500-BL**|**Stock Number**<br>**Backlit Version**<br>**DPM 500-BL**|**Stock Number**<br>**Backlit Version**<br>**DPM 500-BL**|**Stock Number**<br>**Backlit Version**<br>**DPM 500-BL**|
|---|---|---|---|---|
|**Specification**|**Min.**|**Typ.**|**Max.**|**Unit**|
|Accuracy (overall error)*||0.05|0.1|% (±1 count)|
|<br>Linearity<br>|||±1|count<br>|
|Sample rate||3||sample/sec|
|Operating temperature range<br>|0||50|°C<br>|
|Temperature stability<br>||100||ppm/°C|
|Supply voltage<br>|7.5|9|14|V|
|Supply current<br>||150||A<br>µ|
|Backlight voltage<br>||5<br>||V<br>|
|Backlight current||30|60|mA|
|Input leakage current (Vin = 0V)||1|10|pA|



* To ensure maximum accuracy, re-calibrate periodically. 

## **CONNECTOR SOURCING GUIDE** 

**METHOD 40 Pin DIL IC Socket** 

## **SAFETY** 

TocomplywiththeLowVoltageDirective(LVD93/68/EEC), inputvoltagestothemodule’spinsmustnotexceed60Vdc.Ifvoltagestothe 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)** 

## **PANEL FITTING** 

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1.1 8.2 Fit the bezel to the front of the<br>60.0 (2.36) (0.04) (0.32) panel and locate the meter into<br>the bezel from behind.<br>45.0 (1.77) Alternatively the meter and<br>bezel may be assembled before<br>fitting to the front of the panel<br>but care must be taken not to<br>use excessive force. Finally fit<br>Display in TEST mode the window into the front of<br>thebezel.<br>5.0<br>(0.19) 52 (2.05) 12.1 (0.48) 4.0 (0.16)<br>1 7 12 20 9 11<br>1 7 12 20<br>13 12 3 2 5 15 8 ON-BOARD LINKS<br>10 1 4 14<br>40 21 Rb Ra OPTIONAL SCALING<br>40 7 21 RESISTORS<br>1.87 0.5 2.54 4.8 REAR VIEW<br>(0.07) (0.02) (0.1) (0.19)<br>Panel cut-out = 57 x 27 (2.24 x 1.06)<br>(1.18) (0.63)<br>30.0 16.0<br>(0.33) V+ V m A ° F ° C µ M K ~ - XB3 : E3 AB POL (0.60) (0.98)<br>8.5 15.2 24.8<br>V+ Ω Hz TEST REF HI REF LO REF+ REF- COM IN HI IN LO BG -5V XDP V- DP1 DP2 DP3 XG3 BP<br>- -<br>+ +<br>**----- End of picture text -----**<br>


## **www.lascarelectronics.com** 

**LASCAR ELECTRONICS LTD. LASCAR ELECTRONICS INC. LASCAR ELECTRONICS (HK) LIMITED MODULE HOUSE, WHITEPARISH, 3750 West 26th Street, FLAT C, 5/FL., LUCKY FTY. bldg., 63-65 HUNG TO ROAD WILTSHIRE SP5 2SJ UK Erie, PA 16506 USA 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 2797 3219 FAX: +852 2343 6187 E-mail: sales@lascar.co.uk E-mail: us-sales@lascarelectronics.com E-mail: b4lascar@samsongroup.com.hk** 

## **PIN FUNCTIONS** 

1,40. V+ Positivepowersupply. 2-7,12-14,17,38,39 See **SPECIALNOTE: ANNUNCIATORS.** 15. - Inputforthepolarityannunciator. InternallylinkedtoPOL(pin20). Ifthisistobeexternallycontrolled,cutlink11. 16,18,19,22 XB3,E3,AB,XG3. Outputsforuseinauto-rangingapplications. 20. POL Drivefor"-"annunciator. Internallyconnectedbylink11. 21. BP LCDbackplanedrivewaveform. 23. DP3 1.999 24. DP2 19.99 See **SPECIALNOTE: ANNUNCIATORS.** 25. DP1 199.9 26. V- Negativepowersupply. 27. XDP Connecttorequiredannunciators/DPs(seenote). 28. -5V Notconnected. 29. BG Inputforbandgapreference.(1.22Vnom). 30. INLO Negativemeasuringinput. Analogueinputsmustbenocloserthan1Vtoeitherthepositiveornegativesupply. 31. INHI Positivemeasuringinput. Analogueinputsmustbenocloserthan1Vtoeitherthepositiveornegativesupply. 32. COM ThegroundfortheanaloguesectionoftheA/Dconverter,heldactivelyat2.8V(nom)belowV+. COMmustnotbeallowedtosink excessivecurrent(>100 µ A)byconnectingitdirectlytoahighervoltage. 33. REFNegativeoutputfrominternalreference. 34. REF+ Positiveoutputfrominternalreference. 35. REFLO Negativeinputforreferencevoltage. 36. REFHI Positiveinputforreferencevoltage. 37. TEST ConnectingthispintoV+turnsonthesegmentsasillustrated. ItshouldnotbeoperatedformorethanafewsecondsastheDC voltageappliedtotheLCDmay"burn"thedisplay. Thispinisnominallyat5VbelowV+andisthegroundforthedigitalsection of themeter,itcanbeusedasanegativesupplytopowerexternallogicuptoamaximumof1mA. 

40. V+/CLK NormallytiedtoV+viaLink12butcanbeusedtooverridetheinternaloscillatorandcontrolthesampleratebycuttingLink12and makingLink13. 

**LED BACKLIT VERSIONS:** Apply 5V DC to the backlight tab on the side of the meter. Typical current is 30mA. For higher voltages, fit a resistor in series. E.g.For9Vuse150R. Maximumcurrent=60mA. 

**ANNUNCIATORS:** The DPM annunciators (DPs, °C, etc.) can be displayed by connecting them to XDP. However as these annunciators are normally ‘floating’, under certain conditions they may appear when not wanted. To suppress unwanted annunciators, link them to the backplane (BP). If the annunciators are being switched, connect them via a 1M resistor to the BP (pin 21). The annunciators will then operate normally when connected to XDP.EnsurethatanannunciatorisnotconnecteddirectlytotheXDPandBPatthesametime. 

## **VARIOUS OPERATING MODES** 

ON-BOARD LINKS: In order to quickly and easily change operating modes for different applications, the meter has several "on-board links". They are designed to be easily opened(cut) or shorted (soldered). Do not connect more than one meter to the same power supply if the meters cannot use the same signal ground. Taking any input beyondthepowersupplyrailswilldamagethemeter. 

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Normally Normally<br>SHORTED OPEN<br>Cut to Solder to<br>OPEN SHORT<br>**----- End of picture text -----**<br>


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V+ V+<br>1 1<br>V+ V+<br>+ 31 IN HI<br>31<br>+ IN HI ±200mV 14V max<br>±200mV - 30 IN LO 7V min<br>30<br>- IN LO<br>0V<br>V- 1V min V-<br>26 26<br>V- V-<br>Links 1, 2, 3 & 4 SHORTED. Links 1, 3 & 4 SHORTED.<br>Measuring a floating voltage Split supply operation.<br>source of 200mV full scale.<br>1 V+ 1 V+ IIN 1 V+<br>V+ 31 V+ V+<br>31 IN HI + IN HI 31 IN HI<br>R V1 - 30 IN LO 220K<br>30 IN LO + 36 REF HI 6R2 30 IN LO<br>R= [0.2] V2 - 35 REF LO 5K 32 COM<br>IFSR V- V- V-<br>26 V- 26 V- IOUT 26V-<br>Links 1, 2, 3, 4 SHORTED. Links 1, 3 & 4 SHORTED.<br>Measuring current Measuring the ratio of two voltages. Measuring 4-20mA to read 0-999<br>(supply MUST be isolated). Reading = 1000 V1/V2 (supply must be isolated).<br>50mV< V2<200mV<br>V1<2V2.<br>**----- End of picture text -----**<br>


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

**August/2002** 

**Applies to DPM 500/7** 

**M.C.** 

**DPM 500-BL** 

**Issue 6**