This cost compact voltmeter module ideally suited high volume applicat

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This cost compact voltmeter module ideally suited high volume applicat

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Digit Voltmeter Module
This cost compact voltmeter module ideally suited high volume applications. features exceptionally large display miniature package includes auto-zero user-selectable decimal points. module supplied with panel mounting bezel.
FEATURES
Cost 12.5mm (0.5") Digit Height 200mV d.c. Full Scale Reading (typ) d.c. Power Supply Auto-zero Auto-polarity User Selectable Decimal Points Supplied with Mounting Bezel
REAR VIEW
TYPICAL APPLICATIONS
High Volume, Cost Systems Power Supply Monitoring Panel-Mount Indication
ORDERING INFORMATION
Standard Meter Stock Number
ELECTRICAL SPECIFICATIONS
Specification
Accuracy (overall error) Linearity Sample rate Operating temperature range Temperature stability Supply voltage Supply current
Min.
0-1000 reading 0-2000 reading
Typ.
0.25
Max.
counts) counts counts samples/sec ppm/°C d.c.
Unit
ensure maximum accuracy, re-calibrate periodically.
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. 50727 PALO ALTO 94303-0727 TEL: (650) 9027 FAX: (650) 5432 E-mail: lascarus@pacbell.net
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)
Panel thickness: (0.04 0.12)
20.4 (0.80) 14.0 (0.55)
Digit Voltmeter Module
50.0 (1.97) 40.7 (1.60)
(0.20) (0.06)
1.27 (0.05)
24.4 (0.96)
(0.1)
31.0 (1.22)
21.4 (0.84)
50.0
45.0 (1.77) 41.5 (1.63)
(1.97
Pitch (0.1) positions symmetrical about vertical centre line
2.5(0.1)
PANEL FITTING
Panel Meter Fixing Clip
Bezel
Fastener
CONFIGURATION
(rear view)
FUNCTIONAL BLOCK DIAGRAM
Vref
REAR VIEW
VINHI INLO
INHI INLO
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CIRCUIT DIAGRAM
TEST
Digit Voltmeter Module
INHI INLO
300k
68nF 220nF
CREF+ CREFREF OSC1 OSC2 OSC3
100nF 100nF
100k 100k
100pF
LCD1
199.9 19.99 1.999
LOBAT
1.5k 100k 3904 100k
FUNCTIONS
VINHI INLO
Positive power supply connection. Negative power supply connection. Positive measuring input with reference Analogue inputs must closer than either positive negative supply. Negative measuring input with reference Connect DP1, display required decimal point. Connect display Decimal Point (199.9). Connect display Decimal Point (19.99). Connect display Decimal Point (1.999).
Solder Links:
Normally Closed, connects INLO.
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SCALING
resistors used alter full scale reading (FSR) meter table. meter will have recalibrated adjusting calibration potentiometer rear module.
200V 2000V* 200µA 20mA 200mA 910k 100k 100R 100R
Digit Voltmeter Module
Voltage Current
INHI INLO
*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.
+7.0 +12V
Normally SHORTED OPEN
Normally OPEN Solder SHORT
+7.0 +12V
±200mV
Measuring input voltage referenced floating supply, i.e. input voltage meter's power supply isolated from each other. Check Link closed.
Measuring current referenced floating supply, i.e. current being measured meter's power supply isolated from each other. Check Link closed.
+3.5 +6.0V
±200mV
-3.5 -6.0V
Measuring single ended input referenced supply, i.e. input voltage meter's power supply share same rail. Check Link open.
Specifications liable change without prior warning
Issue
January/2002
M.C.
Applies 125/2
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