Martel Electronics OEM1B User Manual
OEM 1B
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3½ Digit LCD Voltmeter Module
PRODUCT DESCRIPTION
The OEM 1B uses the latest miniaturisation techniques to produce a very compact 3 ½ digit LCD voltmeter. It is
designed to be a drop-in component in most medium and high volume applications, ranging from personal
instrumentation and integral sensor indicators to measurement probes. The meter features 8mm digit height, 3
decimal points, auto-polarity, auto-zero, 200mV full scale reading and a very low current consumption.
Connection tothe module is via two dual in line rows of pins.
FEATURES
•8
mm (0.31") Digit Height
• 200mV d.c. Full Scale Reading
• 150 A @ 7.5 to 14V Operation
µ
•
Auto-zero and Auto-polarity
• Selectable
• Very Compact Design
Decimal Points
TYPICAL APPLICATIONS
• Personal Gas Monitoring
• Medical Instruments
ORDERING INFORMATION
Stock Number
Standard Meter OEM 1B
• Measurement Probes
• Hand held instruments
ELECTRICAL SPECIFICATIONS
Specification Min. Typ. Max. Unit
Accuracy (overall error) * 0.1 % (±1 count)
Linearity 1 count
Sample rate 2.5 samples/sec
Operating temperature range 0 50 °C
Temperature stability 100 ppm/°C
Supply voltage (V+ to V-)
Supply current 150 Aµ
Input leakage current (Vin = 0V) 1 10 pA
* To ensure maximum accuracy, re-calibrate periodically.
** Operation of the meter beyond the maximum supply voltage rating may cause permanent damage to the meter.
Unless otherwise noted, specifications apply at T =25°C, V =5Vd.c. (f =48kHz) and are tested with the module configured for floating input
mode.
A supply clock
7.5 9 14** V d.c.
+
SAFETY
Tocomply 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 panel meter 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).
LASCAR ELECTRONICS LTD.
MODULE HOUSE
WHITEPARISH
WILTSHIRE SP5 2SJ
UK
TEL: +44 (1794) 884567
FAX: +44 (1794) 884616
E-mail: sales@lascar.co.uk
LASCAR ELECTRONICS INC.
3750 West 26th Street
Erie
PA 16506
USA
TEL: +1 (814) 835 0621
FAX: +1 (814) 838 8141
E-mail: us-sales@lascarelectronics.com
LASCAR ELECTRONICS (HK) LIMITED
FLAT C, 5/FL., LUCKY FTY. BLDG.
63-65 HUNG TO ROAD
KWUN TONG KOWLOON
HONG KONG
TEL: +852 2797 3219
FAX: +852 2343 6187
E-mail: b4lascar@samsongroup.com.hk
PO Box 770, Londonderry, NH 03053 1-800-821-0023
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www.martelcorp.com
www.lascarelectronics.com
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OEM 1B
DIMENSIONS
All dimensions in mm (inches)
3½ Digit LCD Voltmeter Module
13.4 (0.53)
23.4 (0.92)
0.2(0.01)+
17.8 (0.70)
0.4(0.02)+
16.4 (0.65)
5.3 (0.21)
5.5 (0.22)
6.35
(0.25)
5.5
(0.22)
CAL
5.0
(0.20)
1.27 (0.05)
12.7 (0.50)
2.54 (0.10)
FUNCTIONAL BLOCK DIAGRAM
V+
RHI
COM
RLO
INI
ILO
CAL
+
Vref
_
A/D
V-
1
DP321
XDP
8
PO Box 770, Londonderry, NH 03053 1-800-821-0023
www.lascarelectronics.com
www.martelcorp.com
PIN CONFIGURATION
DP3
DP2
DP1
NC
RHI
CAL
COM
ILO
V+
IHI
RLO
(rear view)
XDP
V-
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