Martel Electronics DPM750S-BL User Manual
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DPM 750S-BL
3½ Digit Backlit LCD Voltmeter Module
The DPM 750S-BL features a 200mV d.c. measurement range with auto-zero and auto-polarity. Decimal points are
user selectable.
The meter features a negative rail generator which enables the meter to measure a signal referenced to
its own power supply GND. A low drift bandgap reference circuit ensures accurate readings over a wide temperature
range. low cost means it will
LED backlighting ensures excellent readability under low light conditions. The module's
suit high and low volume applications. This module is supplied with a plastic mounting bezel. A waterproof seal to
IP67 / NEMA 4X is achievable, using the optional BEZ 700-IP bezel.
FEATURES
• 12.7
mm (0.5") Digit Height
• 200mV d.c. Full Scale Reading
• 3.0 to 7.5V or 6.0 to 15V d.c. Operation
•
Auto-zero and Auto-polarity
•
Programmable Decimal Points
•
LED Backlighting (30mA @ 5V typ.)
• Low Battery Warning
• Bandgap Reference
°°
CF
µA
mV
kΩ
MH
z
TYPICAL APPLICATIONS
• Precision Instrumentation Systems
• Power Supply Monitoring
• Test Boxes
ORDERING INFORMATION
Stock Number
Standard Meter DPM 750S-BL
IP67 / NEMA 4X Bezel BEZ 700-IP
• 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 50 ppm/°C
Supply voltage V+ to GND configuration 3 5 7.5 V d.c.
Supply current V+ to GND configuration 500 A
Backlight supply voltage 4.75 5.0 ** V d.c.
Backlight supply current @ 5V d.c. 30 mA
Input leakage current (Vin = 0V) 1 10 pA
* To ensure maximum accuracy, re-calibrate periodically.
** An external series resistor is required above 5V, see Applications.
*** This specification linearly derates to 30mA @ 50°C.
V+ to V- configuration 6 9 15 V d.c.
µ
V+ to V- configuration
350 A
50 ***
µ
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 meter into the user’sequipment 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.lascarelectronics.com
www.martelcorp.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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DPM 750S-BL
DIMENSIONS
All dimensions in mm (inches)
3½ Digit Backlit LCD Voltmeter Module
34.5 (1.36)
64.5 (2.54)
Panel cut-out: 62.0 - 32.0
(2.44 - 1.26)
PANEL FITTING
Panel thickness: 1.0 - 3.0
(0.04 - 0.12)
25.0 (0.98)
53.0 (2.17)
46.7 (1.84)
60 (2.36)
2.8 (0.11) dia
6.1 (0.24)
30 (1.18)
17.7 (0.7)
6.1
(0.24)
1.6 (0.06)
(0.26)
1.6
(0.06)
6.5
9.5
(0.37)
Insulating
Washer
FUNCTIONAL BLOCK DIAGRAM
V+
Vref
COM
INHI
INLO
CAL
BL-
+
_
A/D
8
1
Shake-proof
Washer
21
3
PIN CONFIGURATION (rear view)
Vm°CA°FµMkOhmHz:
CAL
V+
GND
(0.1)
LCOM
BL-
INHI
INLO
DP1
Rb
Ra
DP2
DP3V-COM
~
La
101
18.6 (0.73)2.54
6.3
(0.25)
V-
DP321GND
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PO Box 770, Londonderry, NH 03053 1-800-821-0023
www.lascarelectronics.com
www.martelcorp.com
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