Martel Electronics OEM1B-LED User Manual
OEM 1B-LED
3½ Digit LED Voltmeter Module
PRODUCT DESCRIPTION
This low cost sub-miniature LED voltmeter module is ideally suited for high volume applications. It features an exceptionally
large display in a miniature package and includes auto-zero and user-selectable decimal points. The use of low current
display technology means this LED product can be considered for battery powered applications. The OEM 1B-LED is
dimensionally compatiblewith its LCD counterpart, the OEM 1B. Connection to the module is via two rows of pins.
FEATURES
•8
mm (0.31") Digit Height
• 200mV d.c. Full Scale Reading
• 50mA (typ) @ +5V d.c. Power Supply
•
Auto-zero and Auto-polarity
• User Selectable
• DIL Pin Connection
• Size compatible with OEM 1B (LCD module)
Decimal Points
Module shown actual size
TYPICAL APPLICATIONS
• High Volume, Low Cost Systems
• Power Supply Monitoring
ORDERING INFORMATION
Stock Number
Standard Meter OEM1B - LED
• Handheld Indication
• Panel-Mount Indication
ELECTRICAL SPECIFICATIONS
Specification Min. Typ. Max. Unit
Accuracy (overall error) * 0.05 0.1 % (±1 count)
Linearity ±1 count
Sample rate 2.5 samples/sec
Operating temperature range 0 50 °C
Temperature stability 150 ppm/°C
Warm-up time 10 minutes
Supply voltage 4.75 5 5.25 V d.c.
Supply current ** 50 100 mA
Input leakage current 1 10 pA
* To ensure maximum accuracy, re-calibrate periodically.
** Depends on reading and temperature.
Unless otherwise noted, specifications apply at T =25°C, V =5Vd.c. (f =40kHz) and are tested with the module configured for floating input
mode.
A supply clock
SAFETY
To comply with the Low Voltage Directive (LVD 93/68/EEC), input voltages to the module’s pins must not exceed
60Vdc. The usermustensurethat 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
PO Box 770, Londonderry, NH 03053 1-800-821-0023
www.martelcorp.com
www.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
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OEM 1B-LED
DIMENSIONS
All dimensions in mm (inches)
3½ Digit LED Voltmeter Module
8.0
Viewing Area
(0.31)
23.4 (0.92)
19.5 (0.77)
Viewing Area
16.4 (0.65)
5.4 (0.21)
5.5 (0.22)
6.35
(0.25)
5.5
(0.22)
1.27 (0.05)
CAL
12.7 (0.50)
2.54 (0.10)5.0 (0.20)
FUNCTIONAL BLOCK DIAGRAM
V+
RHI
Vref
COM
RLO
IHI
ILO
+
CAL
0V
A/D
1
DP321
_
TEST
8
PO Box 770, Londonderry, NH 03053 1-800-821-0023
www.lascarelectronics.com
www.martelcorp.com
PIN CONFIGURATION
CAL
7
6
RHI
RLO
NC
COM
DP1
ILO
DP2
IHI
DP3
V+
(rear view)
12
TEST
0V
1
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Pin 1
identifier
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