EMV 1025S-0 1 Single Hole Mounting Meter EMV 1025S-0 1 is an easy to mount LCD digital voltmeter. It features 200mV full scale reading, auto-zero and auto-polarity. Installation time is greatly reduced with 7 only 3 wires to connect. The user need only drill a single 5.5mm / / hole in the panel. The module is fitted to the panel by locating its screw threaded stud through 32 the hole, adding the washer and tightening the nut provided. The module s connections pass through the hollow stud into the target application. A rubber seal is included, providing splashproof protection for the unit when fitted to the meter during installation. This datasheet also refers to OEM variants, referred to as EMV 1025S-X X, where X X refers to the factory-configured scaling and decimal configuration options. Single Hole Mounting 12.5mm / 0.5 LCD Digit Height 200mV Full Scale Reading - - 3-Wire Connection Auto-zero, Auto-polarity Low Battery Warning Shown Actual Size Splashproof Specifications Min. Typ. Max. Unit Accuracy (overall error)* 0.1 % (2 counts) Linearity 1 count Stock Numbers* Displayed reading -1999 1999 Resolution 0.1 mV d.c. EMV 1025S-X X Sample rate 3 sample/sec Operating temperature range 0 50 C 1 Range Decimal Point Temperature stability 100 ppm/C Supply voltage 3.5 5 7.0 V d.c. 0=200mV 0=NO DP Supply current 250 m A 1=2V 1=DP1 * To ensure maximum accuracy, recalibrate periodically. 2=20V 2=DP2 3=200V** 3=DP3 Unless otherwise noted, specifications apply at T =25C, V =5Vd.c. (f =48kHz) and A supply clock are tested with the module configured for fully floating input mode. e.g.: EMV 1025S-1 3 2Vd.c. full scale, DP3 displayed (1.999) For modules manufactured to your scaling requirements, contact Lascar direct.* * Minimum order quanitity of 50 pcs. applies. ** Maximum allowable input voltage is 60Vd.c. DIMENSIONS All dimensions in mm (inches) 31 (1.22) Seal Panel 3 Wires - 30cm (12.0) 14.5 (0.57) EMV 1025S-X X DP3 DP2 DP1 5.5 (0.2) Nut 9.0 Washer REAR VIEW 10.5 (0.35) (0.4) 5.00 (0.20) 10.5 (0.4) CAL FITTING THE EMV 1025S-0 1 7 Drill a 5.5mm / / hole in the panel. Fit seal to the rear of the module. Fit the 32 module to the panel by passing its screw threaded stud through the hole, fitting the 22 (0.87) 22 (0.87) washer and tightening the nut provided. Do not to overtighten the nut as this may Module thickness 5.5mm (0.22) damage the meter. 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 TERMINAL FUNCTIONS 1. Red V+ Positive power supply connection. 2. Black GND Negative power supply connection. 3. Yellow IN HI Positive measuring input with reference to GND. SAFETY To comply with the Low Voltage Directive (LVD 93/68/EEC), input voltages to the modules pins must not exceed 60Vdc. The user must ensure that the incorporation of the unit into the users equipment conforms to the relevant sections of BS EN 61010 (Safety Requirements for Electrical Equipment for Measuring, Control and Laboratory Use). VOLTAGE SCALING Two resistors Ra and Rb may be added in order * Subject to a minimum order quantity of 50 Required V Ra Rb FSR to alter the full scale reading (FSR) of the meter - pcs., pre-scaled modules are available from 2V* 910kWW100k Lascar. See stock number table on the front of see table and diagrams below. The meter may this datasheet. Customer-specific scaling options 20V* 1MWW10k be re-calibrated by adjusting the calibration may also be available on request. Contact Lascar 200V* 1MWW1k potentiometer at the rear of the module. sales office for details. Required I Rs P (Power Rating) FSR 200uA 1kW 0.04mW CURRENT SCALING 2mA 100W 0.4mW A current shunt Rs may be added in order to 20mA 10W 4mW alter the full scale reading (FSR) of the meter - 200mA 1W 40mW see table and diagrams below. The meter may 2A 100mW** 400mW ** We recommend that purpose made shunts be re-calibrated by adjusting the calibration are used for these ranges. 20A 10mW** 4W potentiometer at the rear of the module. 200A 1mW 40W APPLICATIONS Do not connect more than one meter to the same power supply if the meters cannot use the same signal ground. Do not connect IN HI to a voltage greater than (V+ - 1V )or to a voltage lower than (-(V+) + 1V) if the meter is unscaled, as this may damage the meter. Keep leads short to ensure noise-free operation. To maximise measurement accuracy, use high precision (1%), low temperature drift (50ppm/C or better) scaling resistors (Ra, Rb and Rs). V+ +3.5 to +7.5V d.c. V+ I +5V Ra 7805 IN HI Vin Supply Voltage V+ Voltage to be Load Rb V supply measured GND (8-30V)* 220nF 470nF 0V 0V GND IN HI Measuring a single ended input referenced to supply. Rs Rs = V FSR Measuring current. I FSR The module shown is an EMV 1025S-0 2 I +5V Ra=1M S selects between voltage and current measurement 7805 1 V+ Load A Voltage: Ra, Rb and Rcal scale the module for 20V FSR IN HI R L V S supply 1 V (8-30V)* Current: Rs = 200mV (e.g. 10mW / 4W for I =20A) Rb=8k FSR 220nF 470nF I FSR Calibration: RCAL=5k GND First calibrate the current range, by adjusting the meter s own calibration Rs potentiometer. Then calibrate the voltage range, by adjusting the RCAL potentiometer. Shunt Measuring supply voltage and current. * Consult 7805 voltage regulator manufacturer s datasheet for minimum and maximum allowable input voltage ratings. Specifications liable to change without prior warning EMV 1025S-X X Issue 4 August/2002 M.C. Applies to EMV 1025S/1