features 200mV d.c. measurement range with auto-zero auto-polarity. De

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features 200mV d.c. measurement range with auto-zero auto-polarity. De

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Digit Voltmeter Module
features 200mV d.c. measurement range with auto-zero auto-polarity. Decimal points user selectable. display features battery warning annunciator, which driven external circuitry. module's cost means will suit most high volume applications.
FEATURES
Cost 15mm (0.6") Digit Height 200mV d.c. Full Scale Reading (typ) d.c. Power Supply Auto-zero Auto-polarity User Selectable Decimal Points Compatible with Industry-Standard Types Supplied with Mounting Bezel
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 0-1000 reading 0-2000 reading
Min.
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: ++44 (1794) 884567 FAX: ++44 (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)
Digit Voltmeter Module
(0.06) (0.26)
Panel thickness: (0.04 0.12)
(2.17) (1.86)
(0.11)
25.0 (0.98)
34.5 (1.36)
(2.36)
64.5 .54)
Panel cut-out: 62.0 32.0 (2.44 1.26)
17.7 (0.7) 38.1 (1.5) (0.11) Pitch (0.1)
PANEL FITTING
Panel Meter Fixing Clip
Bezel Fastener
(1.18)
CONFIGURATION
(rear view)
FUNCTIONAL BLOCK DIAGRAM
Vref
INHI INLO
REAR VIEW
INLO INHI TEST
LOBAT
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CIRCUIT DIAGRAM
Digit Voltmeter Module
LOBAT
INHI INLO
300k
68nF 220nF
CREF+ CREFREF OSC1 OSC2 OSC3
100nF 100nF
100k
100k
100pF
TEST
1.999 19.99
IC2B
LCD1
IC2A
199.9
IC2D
IC2C
4070
TEST
1.5k
FUNCTIONS
INLO INHI TEST
Backplane connection from voltmeter application diagram next page. connection "Low Battery" annunciator. Connect display Decimal Point (1.999). Connect display Decimal Point (19.99). Connect display Decimal Point (199.9). Positive output from internal reference. Negative output from internal reference. ground analogue section converter, held actively 2.8V (nom) below VDD. must allowed sink excessive current 100µA) connecting directly higher voltage. Positive input reference voltage. Negative input reference voltage. Negative power supply connection. Analogue inputs must closer than Negative measuring input with reference either positive negative supply. Positive measuring input with reference Connecting this turn display segments "-1888". should operated more than seconds voltage applied "burn" display. This nominally below ground digital section meter, used negative supply power external logic maximum 1mA. Positive power supply connection.
Solder Links:
Normally Open. Normally Open.
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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.
+12V
±200mV
Normally SHORTED OPEN
Normally OPEN Solder SHORT
+12V
Measuring input voltage referenced floating supply, i.e. input voltage meter's power supply isolated from each other.
Measuring current referenced floating supply, i.e. current being measured meter's power supply isolated from each other.
+3.5 +6.0V
±200mV
4070
470k THRESHOLD
TEST
-3.5 -6.0V
Measuring single ended input referenced supply, i.e. input voltage meter's power supply share same rail. Driving Battery annunciator with associated external logic battery detection circuitry.
Specifications liable change without prior warning
Issue
November/2001
M.C.
Applies 600/2
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features 200mV d.c. measurement range with auto-zero auto-polarity. De

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