Martel Electronics DPM 1AS-BL User Manual
DPM1AS-BL
3½DigitBacklitLCDVoltmeterModule
PRODUCT DESCRIPTION
TheDPM1AS-BLfeaturesa200mVd.c.measurementrangewithauto-zeroandauto-polarity.Decimalpointsareuser
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 1AS-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
suit high and low volume applications. The DPM 1AS-BL is intended to replace the DPM 1, DPM 1S, DPM 1-BL and
DPM 1S-BL in manyapplications,usuallyrequiring only minor circuit modifications.
FEATURES
mm (0.22") Digit Height
• 5.5
• 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
ORDERING INFORMATION
Stock Number
StandardMeterDPM1AS-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. 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
Tocomply with the LowVoltage Directive (LVD 93/68/EEC), input voltages to themodule’s pins must not exceed
60Vdc. The user must ensure that the incorporation of the panel meter intotheuser’s equipmentconformsto the
relevant sections of BS EN 61010 (Safety Requirements for Electrical Equipment for Measuring, Control and
Laboratory Use).
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DPM1AS-BL
DIMENSIONS
All dimensions in mm (inches)
3½DigitBacklitLCDVoltmeterModule
Panel cut-out: 28.4 x 11.4
(1.12 x 0.45)
PANEL FITTING
Panel
Module
14.0 (0.55)
11.0 (0.43)
0.50 (0.02)
pin width
Panel thickness: 1.0 - 2.5
(0.04 - 0.10)
30.0 (1.18)
28.0 (1.10)
2.00 (0.08)
pin pitch
c
ab d
1.26 (0.05)
5.00 (0.20)
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
110
V+
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