DPM702S

DPM 702S 3 Digit Dual Channel LCD Module An ultra-low profile LCD meter using advanced components and construction techniques to provide an unrivaled combination of dual channel voltage measurements and low cost. This product is ideal for those applications wherematche readings are required, e.g.: voltage and current, temperature and humidity, etc. Both measurement inputs share a common ground line, thereby reducing the number of connections to a minimum. The very low current consumption results in a long battery life and makes it especially suitable for portable equipment. A low battery warning circuit is fitted as standard. The 10- way pin header can be replaced by screw terminal blocks on request. Contact your nearest Lascar Sales Office for further details. 6.4mm (0.25) Digit Height Dual Channel 200mV d.c. Full Scale Reading (F.S.R.) Selectable Decimal Points Auto-zero, Auto-polarity Common Signal Ground Annunciators Stock Number SCALING Dual Channel Meter DPM 702S The full scale reading (F.S.R.) of each measurement Specification (channel A or B) Min. Typ. Max. Unit channel may be altered by the addition of two resistors Accuracy (overall error)* 0.05 0.1 % (1 count) Ra and Rb per channel- see Linearity 1 count + table. Each measurement Full scale reading -199.9 199.9 mV d.c. channel will require re- Ra calibration by adjusting CAL Resolution 100 m V d.c. INPUT IN HI A and CAL B. Sample rate 3 samples/sec Rb Operating temperature range 0 50 C IN LO - Temperature stability 100 ppm/C Supply voltage 3.5 5 7 V d.c. Required F.S.R. Ra Rb Supply current 700 m A 2V 910k 100k Input leakage current (Vin= 0V) 1 10 pA 20V 1M 10k * To ensure maximum accuracy, re-calibrate periodically. 200V 1M 1k 2kV 1M 100R 200m A 0R 1k 2mA 0R 100R 20mA 0R 10R 200mA 0R 1R DIMENSIONS All dimensions in mm (inches) 58.0 (2.28) 55.0 (2.16) 6.1 (0.24) 47.0 (1.85) REAR VIEW 1.6 (0.06) DP A 123 CAL A CAL B 12345678910 123 DP B 1.5 (0.05) 2.1 Optional screw 60.0 (2.36) (0.08) terminal blocks 2.50 8.5 (0.10) (0.33) 64.5 (2.54) 2.00 47.0 (1.84) Pin Functions 1.0 (0.08) (0.04) 2.50 Display in TEST mode. (0.09) Panel cut-out 62.0 x 32.0 (2.44 x 1.26) PANEL FITTING Fit the bezel to the front of the panel, then locate the meter to the bezel from behind the panel. Using the screws provided, secure the two plastic spring clips to the rear of the meter. The meter is designed to fit directly onto OKW Type M, P and Veronex size 3 enclosures. WEBSITE: LASCAR ELECTRONICS LTD. LASCAR ELECTRONICS INC. MODULE HOUSE, WHITEPARISH, PO BOX 8204, SAVANNAH, WILTSHIRE. SP5 2SJ UK GA 31412 USA TEL: ++44 (1794) 884567 FAX: ++44 (1794) 884616 TEL: ++1 (912) 234 2048 FAX: ++1 (912) 234 2049 PIN FUNCTIONS 1. V+ Positive power supply connection. 2. GND 0Vsupply connection. 3. IN HIA Positive measuring differential input. 4. IN HIB Positive measuring differential input. Analogue inputs must be no closer than 1V to the positive supply. 5. IN LO Negative measuring differential input. 6. POL-B Drive pin for channel B polarity sign. Connect to V+ to invert polarity sign when measuring Voltage and Current simultaneously. 7. TEST-A Connect to V+ to display all Channel A segments, except annunciators. 8. TEST-B Connect to V+ to display all Channel B segments, except annunciators. 9. N/C Not connected. 10. N/C Not connected. SAFETY To comply with the Low Voltage Directive (LVD 93/68/EEC), input voltages to the modules pins must not exceed 60Vdc. If voltages to the measuring inputsdo exceed 60Vdc, then fit scaling resistors externally to the module. The user must ensure that the incorporation of the DPM into the users equipment conforms to the relevant sections of BS EN 61010 (Safety Requirements for Electrical Equipment for Measuring, Control and Laboratory Use). DISPLAYING ANNUNCIATORS Normally Annunciators are displayed by making the required solder links. See below for examples. OPEN Solder to SHORT Blank VARIOUS OPERATING MODES +5V +5V I 1 1 V+ V+ 3 3 V1 IN HIA IN HIA Power 4 4 V2 IN HIB IN HIB Supply Load Shunt = 0.2V 5 I IN LO 5 Circuit IN LO Under Test GND GND Shunt 2 2 0V 0V Measuring Two d.c. Voltages Simultaneous d.c. Voltage and Current Measurement. Invert the polarity sign of channel B by connection pin 6 to pin 1. +5V I1 Load1 Shunt1 1 V+ 3 IN HIA Shunt1 = 0.2V Circuit I2 Load2 Shunt2 Under Test I1 4 IN HIB Shunt2 = 0.2V I2 5 IN LO GND ICOM 2 0V Measuring Two d.c. Currents. Specifications liable to change without prior warning DPM 702S Issue 2 August/1999 N.D.H. Applies to DPM 702S/2