
DPM 3AS-BL
3‰ Digit Backlit LCD Voltmeter Module
PRODUCT DESCRIPTION
The DPM 3AS-BL features a 200mV d.c. measurement range with auto-zero and auto-polarity. Decimal points are user
selectable. The DPM 3AS-BL features a negative rail generator which enables the meter to measure a signal referenced
to its own power supply GND. LED backlighting ensures excellent readability under low light conditions. The design
of the panel meter’s housing allows the module to be easily snapped into a panel. The module’s low cost means it will
suit high and low volume applications. The DPM 3AS-BL is intended to replace the DPM 3, DPM 3S, DPM 3-BL and
DPM 3S-BL in many applications, usually requiring only minor circuit modifications.
FEATURES
? 11 mm (0.43") Digit Height
? 200mV d.c. Full Scale Reading
? 3.0 to 7.5V or 6.0 to 15.0V Operation
? Auto-zero and Auto-polarity
? Programmable Decimal Points
? LED Backlighting
TYPICAL APPLICATIONS
? Precision Instrumentation Systems
? Power Supply Monitoring
ORDERING INFORMATION
Stock Number
? Hand held instruments
? Panel-Mount Indication
? Low Power Voltage Measurement
ELECTRICAL SPECIFICATIONS
Standard Meter
DPM 3AS-BL
Specification
Min.
Typ.
Max.
Unit
Accuracy (overall error) *
Linearity
Sample rate
0.1
2.5
–1
% (–1 count)
count
samples/sec
Operating temperature range
Temperature stability
0
250
50
°C
ppm/°C
Meter supply voltage
V+ to GND configuration
3.0
5.0
7.5
V d.c.
V+ to V-
configuration
6.0
9.0
15.0**
V d.c.
Meter supply current
V+ to GND configuration
350
A
m
V+ to V-
configuration
175
A
m
Backlight supply voltage
Backlight supply current @ 5V d.c.
Input leakage current (Vin = 0V)
4.75
5.0
40
1
***
60
10
V d.c.
mA
pA
PO Box 770, Londonderry, NH 03053 1-800-821-0023
* To ensure maximum accuracy, re-calibrate periodically.
** Operation of the meter beyond the maximum supply voltage rating may cause permanent damage to the meter.
*** An external series resistor is required above 5V, see Applications.
Unless otherwise noted, specifications apply at T A =25°C, V supply =5Vd.c. (f clock =48kHz) and are tested with the module configured for fully floating
input mode.
SAFETY
To comply 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 INC.
E-mail: b4lascar@samsongroup.com.hk
www.martelcorp.com