QM 130 M 9 Segment LCD Meter This low cost, compact indicator is ideally suited for low or high volume applications. The meter features a 9 segment LCD to display 1V d.c. full scale reading. Other voltages and currents can be measured via the addition of 2 scaling resistors. The meter can be used in applications where the order of magnitude of the reading is more important than the value of the reading itself. It allows the operator to scan the display and receive a quick visual feedback. Installation is particularly easy; the module requires only a single round hole in the panel. A rubber seal is included, providing splashproof protection for the unit when fitted to the meter during installation. 9 Segment LCD Colour Scale Auto-zero 1V d.c. Full Scale Reading Single Hole Mounting No Calibration Required Splashproof Stock Number Standard Meter QM 130M Specification Min. Typ. Max. Unit Accuracy (overall error) * 1 Segment (+1) Full scale reading 1 V d.c. Resolution 125 mV d.c. Sample rate 10 samples/sec Operating temperature range 0 50 �C Supply voltage (V+ to V-) 5 9 12 V d.c. Supply current (@5Vd.c.) 6 mA * At voltages above 1V d.c., the display flashes. DIMENSIONS All dimensions in mm (inches) Seal Panel 3 Wires - 30cm (12.0) QM 130 M 43.50 (1.71) Nut (Display shown in overrange mode) 9.0 Washer (0.35) REAR VIEW 10.70 (0.42) 5.00 31.0 (1.22) (0.20) 10.70 (0.42) 21.75 (0.85) 21.75 (0.85) Module thickness: 5.5mm (0.22") Viewing Area PANEL FITTING 7 Drill a 5.5mm / / " hole in the panel. Fit seal to the rear of the module. Fit the module to the panel by passing its screw threaded stud and the wires through the 32 hole, fitting the washer and tightening the nut. Take care not to trap any of the connecting wires. Do not to overtighten the nut as this may damage the meter. 21.40 (0.84) 14.0 (0.55) Martel Electronics, Corp. P.O. Box 770 Londonderry, NH 03053 Toll Free: (800) 821-0023 Phone: (603) 434-1433 Fax: (603) 434-1653 WIRE FUNCTIONS RED V+ Positive power supply connection. BLACK 0V Negative power supply connection. WHITE Vin Positive measuring input with reference to 0V. Range from 0 to 1V d.c. SCALING Two external resistors may be used to alter the full scale Required F.S.R. Ra Rb reading of the meter - see table for sample values. 10V 910k 100k Alternatively, use the following formulae to calculate Ra 100V 1M 10k and Rb. Select the nearest available standard resistor. To 10mA 0R 100R achieve optimum accuracy, use 1% metal film resistors. 100mA 0R 10R Voltage Current Ra + Vin + Vin Ra=1M I FSD V1 V2 Rb Rs Rs=1V Rb=Ra. V2 . I FSD 0V - - 0V V1-V2 SAFETY To comply with the Low Voltage Directive (LVD 93/68/EEC), input voltages to the module�s pins must not exceed 60Vdc. The user must ensure that the incorporation of the unit 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 5...12Vd.c. 5...12Vd.c. Load V+ V+ Power Supply Vin Vin + 0-1Vd.c. Rs 0V 0V - 0V 0V Measuring a voltage in the range Measuring a d.c. current. 0 to 1V d.c. Rs = 1V I 5...12Vd.c. V+ Ra I Vin V+ Power Load 0V Voltage Supply Vin Rb Rs 0V Current 0V Simultaneous d.c. Voltage and Current Measurement. Rs = 1V I Specifications liable to change without prior warning QM 130M Issue8 September/2001 M.C. Applies to QM 130M