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DPM 742-BL
4-20mA Loop Powered Indicator with Backlighting
PRODUCT DESCRIPTION
The DPM 742-BL gives an accurate, zero adjusted indication of a 4-20mA current. Calibration is by two multi-turn
potentiometers which allow sensitive adjustment of the instrument over a very wide range. Decimal points are jumper
link selectable. A low drift bandgap reference circuit ensures accurate readings over a wide temperature range. LED
backlighting ensures excellent readability under low light conditions. Connection is via screw terminals. The module's
low cost means it will 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 metal bezel.
FEATURES
? 12.7 mm (0.5") Digit Height
? 4-20mA Loop Powered Indication
? Low Volt Drop
? Programmable Decimal Points
? LED Backlighting (30mA @ 5V typ.)
? Bandgap Reference
? Wide Adjustment Range
? Auto-polarity on Display
? IP67 / NEMA 4X Protection via BEZ 700-IP
ORDERING INFORMATION
Stock Number
ELECTRICAL SPECIFICATIONS
Standard Meter
IP67 / NEMA 4X Bezel
DPM 742-BL
BEZ 700-IP
Specification
Accuracy (overall error) *
Min.
0.05
Typ.
Max.
0.1
Unit
% (±1 count)
Linearity
Sample rate
2.5
±1
count
samples/sec
Operating temperature range
Temperature stability
Loop Volt Drop
Supply current
0
5
4
200
5.6
50
20
°C
ppm/°C
V
mA
Backlight supply voltage
4.75
5.0
**
V d.c.
Backlight supply current @ 5V d.c.
Full scale reading (@20mA)
Offset adjustment range
0
-1900
30
50***
1999
+1900
mA
Count
Count
* 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.
FLAT C, 5/FL., LUCKY FTY. BLDG.
63-65 HUNG TO ROAD
KWUN TONG KOWLOON
HONG KONG
TEL: +852 2797 3219
PO Box 770, Londonderry, NH 03053 1-800-821-0023
FAX: +852 2343 6187
E-mail: b4lascar@samsongroup.com.hk
www.martelcorp.com
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
LASCAR ELECTRONICS (HK) LIMITED
www.lascarelectronics.com
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