Digit Backlit Voltmeter Module features 200mV d.c. measurement ra

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Digit Backlit Voltmeter Module features 200mV d.c. measurement ra

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Digit Backlit Voltmeter Module
features 200mV d.c. measurement range with auto-zero auto-polarity. Decimal points user selectable. features negative rail generator which enables meter measure signal referenced power supply GND. backlighting ensures excellent readability under light conditions. module easily fitted into panel, using fixing clip provided. module's cost means will suit high volume applications. design panel meter's housing ensures splash proofing using supplied seal.
FEATURES
9.75mm (0.38") Digit Height 200mV d.c. Full Scale Reading 7.5V 15.0V Operation Auto-zero Auto-polarity Programmable Decimal Points Backlighting Battery Warning Splash Proof
TYPICAL APPLICATIONS
Precision Instrumentation Systems Power Supply Monitoring Test Boxes Panel-Mount Indication Power Voltage Measurement
ORDERING INFORMATION
Standard Meter Stock Number
ELECTRICAL SPECIFICATIONS
Specification
Accuracy (overall error) Linearity Sample rate Operating temperature range Temperature stability Supply voltage Supply current Backlight supply voltage Backlight supply current d.c. Input leakage current (Vin
Min.
Typ.
Max.
15.0** 80****
VGND Vconfiguration configuration configuration configuration 4.75
count) count samples/sec ppm/°C d.c. d.c. d.c.
Unit
ensure maximum accuracy, re-calibrate periodically. Operation meter beyond maximum supply voltage rating cause permanent damage meter. external series resistor required above Applications. **** This specification linearly derates 50mA 50°C. Unless otherwise noted, specifications apply TA=25°C, Vsupply=5Vd.c. (fclock=48kHz) tested with module configured single ended input mode.
SAFETY
comply with Voltage Directive (LVD 93/68/EEC), input voltages module's pins must exceed 60Vdc. user must ensure that incorporation panel meter into user's equipment conforms relevant sections 61010 (Safety Requirements Electrical Equipment Measuring, Control Laboratory Use).
LASCAR ELECTRONICS LTD. MODULE HOUSE WHITEPARISH WILTSHIRE TEL: (1794) 884567 FAX: (1794) 884616 E-mail: sales@lascar.co.uk LASCAR ELECTRONICS INC. 3750 WEST 26th STREET ERIE 16506 TEL: (814) 0621 FAX: (814) 8141 E-mail: us-sales@lascarelectronics.com LASCAR ELECTRONICS (HK) LIMITED FLAT 5/FL., LUCKY FTY. BLDG. 63-65 HUNG ROAD KWUN TONG KOWLOON HONG KONG TEL: +852 2797 3219 FAX: +852 2343 6187 E-mail: b4lascar@samsongroup.com.hk
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DIMENSIONS
dimensions (inches)
Digit Backlit Voltmeter Module
0.75 (0.03) 10.00 (0.39) 6.00 (0.24)
21.3 (0.84)
22.4 (0.88)
20.5 (0.81)
(1.34
2.54 (0.1) pitch 6.76 (0.27) 33.0 (1.30)
4.22 (0.17)
35.1 .38)
Panel thickness: (0.04 0.12)
PANEL FITTING
Panel
Module
Seal
Fixing Clip
CONFIGURATION
4.27 (0.17)
FUNCTIONAL BLOCK DIAGRAM
(rear view)
Vref
BLCAL
LCOM
LBAT
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0.64 (0.03)
CIRCUIT DIAGRAM
Digit Backlit Voltmeter Module
factory fitted options
Pins fitted standard
FUNCTIONS
Positive power supply meter. power supply meter (3.0 7.5V meter power supply applications only). Connect meter's negative supply voltage switch backlighting. meter supply voltages above series resistor Applications suitable circuit diagrams. Positive measuring input. Negative measuring input. Connect display (199.9). Connect display (19.99). Connect display (1.999). VNegative power supply meter (6.0 15.0V meter power supply applications only). Note: negative supply generated internally mirrors positive supply. example: +5V, then internally generated -5V. When measuring with input referenced same supply rail that panel meter, then limitations input range 1.5V) 1.5V). Solder Links: LCOM Normally Open. Connects COM. LBAT Normally Closed. this link disable battery warning sign.
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SCALING
external resistors used alter full scale reading (FSR) meter table. meter will have re-calibrated adjusting calibration potentiometer rear module.
200V 2000V* 200µA 20mA 200mA 910k
Digit Backlit Voltmeter Module
Voltage
Current
100k 100R 100R
*Ensure that rated high voltage use.
APPLICATIONS
connect more than meter same power supply meters cannot same signal ground. Taking input beyond power supply rails will damage meter.
supply operation (3.0
+3.0 +7.5V
7.5V Meter Power Supply)
+3.0 +7.5V
+3.0 +7.5V
±200mV
±200mV
V+>5V then Rs=(V+ 0.04
Measuring single ended input voltage referenced supply, i.e. input voltage meter's power supply share same rail. Ensure solder link LCOM open.
Measuring input voltage referenced floating supply, i.e. input voltage meter's power supply isolated from each other. Ensure solder link LCOM closed. 15.0V Meter Power Supply)
Measuring current from circuit which floating with respect DPM's supply, i.e. current meter's power supply isolated from each other. Ensure solder link LCOM closed.
supply operation (6.0
+3.0 +7.5V
+6.0 +15.0V
+6.0 +15.0V
±200mV
±200mV
Rs=(V+) (V-) 0.04
IRs=(V+ 0.04
-3.0 -7.5V
Measuring single ended input voltage referenced supply, i.e. input voltage meter's power supply share same rail. Ensure solder link LCOM open.
Measuring input voltage referenced floating supply, i.e. input voltage meter's power supply isolated from each other. Ensure solder link LCOM closed. Issue
Measuring current from circuit which floating with respect DPM's supply, i.e. current meter's power supply isolated from each other. Ensure solder link LCOM closed. M.C. Applies 400/3
Specifications liable change without prior warning
June/2002
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Digit Backlit Voltmeter Module features 200mV d.c. measurement ra

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