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| DPM 40 31/2 Digit LED Module A compact low-cost LED module ideally suited for applications where a bright display under all conditions is required. The DPM 40 is fitted with high efficiency LEDs and supplied with a filter and bezel to give a high contrast display. The small size and low cost of the unit makes it 11mm (0.43")Digit Height Programmable Decimal Points Auto-zero Auto-polarity 200mV d.c. Full Scale Reading (F.S.R.) Display Hold SCALING Two resistors Ra and Rb may be fitted in order to alter the full scale reading (F.S.R.) of the meter - see table. The meter will need re-calibration . Stock Number Accuracy (overall error) * Linearity Sample rate Operating temperature range Temperature stability Supply voltage Supply current Input leakage current (Vin = 0V) Specification Min. Typ. 0.05 3 150 5 100 110 Max. 0.1 1 50 5.5 200 pA Required F.S.R. 2V 20V 200V 2kV 200A 2mA 20mA Note Note Note Note 910k 1M 1M 1M LINK LINK LINK Ra 100k 10k 1k 100R 1k 100R 10R Rb 0 4.5 % (1 count) count samples/sec C ppm/C V mA Unit * To ensure maximum accuracy, re-calibrate periodically. NOTE Ensure that link across Ra is OPEN. DIMENSIONS All dimensions in mm (inches) 72 (2.83) a b c Viewing Area 18 (0.71) a. 4.0 (0.16) b. 12.0 (0.47) c. 8.5 (0.33) 36 (1.30) 45.5 (1.79) 24 (0.94) Panel cut-out 68 x 33 (2.68 x 1.30) 62 (2.44) (0.09) +5V COM IN HI IN LO 0V O2.2 Ra Rb 33 (1.30) 27 (1.05) SCALING RESISTORS 30.5 (1.20) 68 (2.68) DP1 DP2 DP3 CLOCK DP COM P.O. Box 897, Windham, NH 03087 (603) 893-0886 (800) 821-0023 FAX (603) 898-6820 PIN FUNCTIONS A. B. C. D. DP1 DP2 DP3 CLOCK/ HOLD E. DP COM 1. +5V 2. COM 3. IN HI 4. IN LO 5. 0V 199.9 19.99 1.999 Connect to 0V to hold display reading. Leave open for normal operation. Connect to Pin A, B or C to select required DP . Positive power supply input. The ground for the analogue section of the converter, held actively at 2.8V (nom) below +5V. This pin is for use only when the module is used with a fully floating supply. It should on no account be connected to any other terminations or circuitry except as specified in the relevant operating modes. Positive measuring input. Analogue inputs must be no closer than 1V to the positive supply or lower than 1.5V below 0V. Negative measuring input. Negative power supply input. 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, Control and Laboratory Use). VARIOUS OPERATING MODES 1 +5V +5V IIN 3 220k +5V +5V IN HI 1 INPUT VOLTAGE + - 3 4 IN HI IN LO 6R2 5k SET ZERO 0V 5 IOUT 0V 4 IN LO 2 COM 0V 5 0V Operation with input referenced to panel 3 R 4 2 1 +5V +5V 3 4 1 +5V +5V IN HI IN LO COM INPUT VOLTAGE + - IN HI IN LO COM 0V 5 R= 0.2 IFSR 2 5 0V 0V 0V Operation with input floating with respect to power supply. Specifications liable to change without prior warning DPM 40 Issue 3 August/1997 M.C. Applies to DPM 40/6 |
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