Martel Electronics DPM 3AS-BL User Manual
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.
to its own power supply GND. The design
of the panel meter’s housing allows the module to be 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
• 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
• Hand held instruments
• Panel-Mount Indication
• Low Power Voltage Measurement
The DPM 3AS-BL features a negative rail generator which enables the meter to measure a signal referenced
LED backlighting ensures excellent readability under low light conditions.
easily snapped into a panel. The module’s
mm (0.43") Digit Height
ORDERING INFORMATION
Stock Number
Standard Meter DPM 3AS-BL
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 250 ppm/°C
Meter supply voltage V+ to GND configuration 3.0 5.0 7.5 V d.c.
Meter supply current V+ to GND configuration 350 A
Backlight supply voltage 4.75 5.0 *** V d.c.
Backlight supply current @ 5V d.c. 40 60 mA
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.
*** An external series resistor is required above 5V, see Applications.
Unless otherwise noted, specifications apply at T =25°C, V =5Vd.c. (f =48kHz) and are tested with the module configured for fully floating
input mode.
V+ to V- configuration 6.0 9.0 15.0** V d.c.
m
V+ to V- configuration
A supply clock
175 A
m
SAFETY
To comply with the Low Voltage Directive (LVD93/68/EEC), input voltages to the module’s pins must not exceed
60Vdc. The user must ensure that the incorporation of the panel meterinto 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.
PO Box 770, Londonderry, NH 03053 1-800-821-0023
E-mail: b4lascar@samsongroup.com.hk
www.martelcorp.com
DPM 3AS-BL 3‰ Digit Backlit LCD Voltmeter Module
DIMENSIONS
All dimensions in mm (inches)
Panel cut-out: 38.0 x 18.0
(1.50 x 0.71)
PANEL FITTING
Panel
Module
20.0 (0.79)
17.5 (0.69)
Panel thickness: 1.0 - 2.5
(0.04 - 0.10)
0.50 (0.02)
pin width
37.5 (1.48)
40.0 (1.57)
pin pitch
6.00 (0.24)
2.54 (0.1)
c
a b d
2.00 (0.08)
13.5 (0.53)
a. 2.00 (0.08)
b. 6.00 (0.24)
c. 1.60 (0.06)
d. 6.00 (0.24)
1
FUNCTIONAL BLOCK DIAGRAM
L-L+
8
1
COM
REF HI
REF LO
INHI
INLO
Vref
V+
CAL
+
_
A/D
V-TEST
BAT XDPGND
PO Box 770, Londonderry, NH 03053 1-800-821-0023
www.martelcorp.com
2
PIN CONFIGURATION (rear view)
11
LREF
BAT
XDP
TEST
CAL
L-
L+
12 13
V+
GND
COM
REF HI
REF LO
DP1DP2 DP3 BAT
1
V-
IN HI
IN LO
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