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 integrated circuit format that can be plugged directly into a DIL socket or panel mounted using the snap in bezel. 12.5mm (0.5“) Digit Height Programmable Decimal Points Auto-zero -+ °C°F µA Auto-polarity mV kΩ MHz 200mV d.c. Full Scale Reading (F.S.R.) LED Backlit Annunciators SCALING Required F.S.R. 2V 20V 200V 2kV 200µA 2mA 20mA 200mA Ra Note Note Note Note 910k 1M 1M 1M 0R 0R 0R 0R Stock Number Backlit Version Two resistors Ra and Rb may be fitted in order to alter the full scale reading (F.S.R.) of the meter - see table. Meter will need re-calibration. DPM 500-BL Specification Accuracy (overall error)* Linearity Sample rate Operating temperature range Temperature stability Supply voltage Supply current Backlight voltage Backlight current Input leakage current (Vin = 0V) Rb 100k 10k 1k 100R 1k 100R 10R 1R Min. Typ. 0.05 3 0 100 9 150 5 30 1 7.5 Max. 0.1 ±1 50 14 60 10 Unit % (±1 count) count sample/sec °C ppm/°C V µA V mA pA * To ensure maximum accuracy, re-calibrate periodically. NOTE Ensure link 10 is cut if fitting Ra. CONNECTOR SOURCING GUIDE METHOD SAFETY 40 Pin DIL IC Socket 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, Control and Laboratory Use). DIMENSIONS All dimensions in mm (inches) PANEL FITTING Fit the bezel to the front of the panel and locate the meter into the bezel from behind. Alternatively the meter and bezel may be assembled before fitting to 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. 1.1 8.2 (0.04) (0.32) 60.0 (2.36) 30.0 (1.18) 16.0 (0.63) 45.0 (1.77) Display in TEST mode 5.0 (0.19) 12 9 21 15.2 (0.60) 40 24.8 (0.98) : E3 AB POL - XB3 K + 1.87 (0.07) 0.5 (0.02) 4.0 (0.16) 20 ~ M V+ V m A °F °C µ - 7 2.54 (0.1) - 1 7 13 12 3 10 + Rb 40 V+ Ω Hz TEST REF HI REF LO REF+ REFCOM IN HI IN LO BG -5V XDP VDP1 DP2 DP3 XG3 BP 8.5 (0.33) 1 12.1 (0.48) 52 (2.05) 4.8 (0.19) 1 2 5 11 12 4 Ra 15 20 8 14 7 21 REAR VIEW Panel cut-out = 57 x 27 (2.24 x 1.06) www.lascarelectronics.com ON-BOARD LINKS OPTIONAL SCALING RESISTORS LASCAR ELECTRONICS LTD. MODULE HOUSE, WHITEPARISH, WILTSHIRE SP5 2SJ UK TEL: +44 (0)1794 884567 FAX: +44 (0)1794 884616 E-mail: [email protected] LASCAR ELECTRONICS INC. LASCAR ELECTRONICS (HK) LIMITED 3750 West 26th Street, Erie, PA 16506 USA TEL: +1 (814) 835 0621 FAX: +1 (814) 838 8141 E-mail: [email protected] FLAT C, 5/FL., LUCKY FTY. bldg., 63-65 HUNG TO ROAD KWUN TONG, KOWLOON, HONG KONG TEL: +852 2797 3219 FAX: +852 2343 6187 E-mail: [email protected] PIN FUNCTIONS 1, 40. V+ Positive power supply. 2 -7, 12-14, 17, 38, 39 See SPECIAL NOTE: ANNUNCIATORS. 15. Input for the polarity annunciator. Internally linked to POL (pin 20). If this is to be externally controlled, cut link 11. 16, 18, 19, 22 XB3, E3, AB, XG3. Outputs for use in auto-ranging applications. 20. POL Drive for "-" annunciator. Internally connected by link 11. 21. BP LCD backplane drive waveform. 23. DP3 1.999 24. DP2 19.99 See SPECIAL NOTE: ANNUNCIATORS. 25. DP1 199.9 26. VNegative power supply. 27. XDP Connect to required annunciators/DPs (see note). 28. -5V Not connected. 29. BG Input for bandgap reference. (1.22V nom). 30. IN LO Negative measuring input. Analogue inputs must be no closer than 1V to either the positive or negative supply. Analogue inputs must be no closer than 1V to either the positive or negative supply. 31. IN HI Positive measuring input. 32. COM The ground for the analogue section of the A/D converter, held actively at 2.8V (nom) below V+. COM must not be allowed to sink excessive current (> 100µA) by connecting it directly to a higher voltage. 33. REFNegative output from internal reference. 34. REF+ Positive output from internal reference. 35. REF LO Negative input for reference voltage. 36. REF HI Positive input for reference voltage. 37. TEST Connecting this pin to V+ turns on the segments as illustrated. It should not be operated for more than a few seconds as the DC voltage applied to the LCD may "burn" the display. This pin is nominally at 5V below V+ and is the ground for the digital section of the meter, it can be used as a negative supply to power external logic up to a maximum of 1mA. 40. V+/CLK Normally tied to V+ via Link 12 but can be used to over ride the internal oscillator and control the sample rate by cutting Link 12 and making Link 13. 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. For 9V use 150R. Maximum current = 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. Ensure that an annunciator is not connected directly to the XDP and BP at the same time. VARIOUS OPERATING MODES Normally SHORTED Cut to OPEN 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 beyond the power supply rails will damage the meter. V+ 1 V+ + ±200mV - 31 30 IN HI VLinks 1, 2, 3 & 4 SHORTED. Measuring a floating voltage source of 200mV full scale. 1 30 R= 0.2 IFSR 30 V+ 14V max 7V min IN LO 0V V26 R - ±200mV IN LO 31 IN HI + 1 V+ 31 IN HI Normally OPEN Solder to SHORT 1V min VLinks 1, 3 & 4 SHORTED. Split supply operation. V+ V+ V1 IN LO V2 V- V26 1 V+ + 31 IN HI - 30 IN LO + V+ 220K 30 5K IOUT V- Measuring the ratio of two voltages. Reading = 1000 V1/V2 50mV< V2<200mV V1<2V2. DPM 500-BL 1 V+ 31 IN HI 6R2 REF HI V26 26 Specifications liable to change without prior warning IIN - 35 REF LO VLinks 1, 2, 3, 4 SHORTED. Measuring current (supply MUST be isolated). 36 V+ Issue 6 August/2002 32 IN LO COM V26 VLinks 1, 3 & 4 SHORTED. Measuring 4-20mA to read 0-999 (supply must be isolated). M.C. Applies to DPM 500/7