Martel Electronics DPM 2AS-BL User Manual
DPM 2AS-BL
3½ Digit Backlit LCD Voltmeter Module
PRODUCT DESCRIPTION
The DPM 2AS-BL features a 200mV d.c. measurement range with auto-zero andauto-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
The DPM 2AS-BL features a negative rail generator whichenables the meter to measure a signal referenced
LED backlighting ensures excellent readability under low light conditions.
easily snapped into a panel. The module's
suit high and low volume applications. The DPM 2AS-BL is intended to replace the DPM 2, DPM 2S, DPM 2-BL and
DPM 2S-BL in many applications, usually requiring only minor circuit modifications.
FEATURES
mm (0.32") Digit Height
• 8.25
• 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
Standard Meter DPM 2AS-BL
• Hand held instruments
• Panel-Mount Indication
• Low Power Voltage Measurement
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. 15 30**** 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.
**** This specification linearly derates to 20mA @ 50°C.
Unless otherwise noted, specifications apply at T =25°C, V =5Vd.c. (f =48kHz) and are tested with the module configured for single ended
input mode.
V+ to V- configuration 6.0 9.0 15.0** V d.c.
µ
V+ to V- configuration
A supply clock
175 A
µ
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 thatthe incorporationof thepanel 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).
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DPM 2AS-BL
DIMENSIONS
All dimensions in mm (inches)
3½ Digit Backlit LCD Voltmeter Module
Panel cut-out: 33.0 x 15.0
(1.30 x 0.59)
PANEL FITTING
Panel
Module
17.0 (0.67)
14.5 (0.57)
0.50 (0.02)
pin width
Panel thickness: 1.0 - 2.5
(0.04 - 0.10)
35.0 (1.38)
32.5 (1.27)
2.00 (0.08)
pin pitch
c
ab d
1.76 (0.07)
7.26 (0.28)
a. 2.00 (0.08)
b. 6.00 (0.24)
c. 1.60 (0.06)
d. 6.00 (0.24)
1
FUNCTIONAL BLOCK DIAGRAM
BL-
8
1
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INHI
INLO
V+
Vref
CAL
+
_
A/D
V-
DP3 2 1 XDPGND
2
DP1
LCOM
DP2
(rear view)
XDP
DP3
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PIN CONFIGURATION
GND
CAL
V-
INHI
BL-
INLO
LXDP
V+
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