LASCAR DPM742-BL User Manual

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. 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 mountingbezel. A waterproof seal to IP67/ NEMA 4X isachievable, using the optionalBEZ 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
• IP67 / NEMA 4X Protection via BEZ 700-IP
A low drift bandgap reference circuit ensures accurate readings over a wide temperature range.
ORDERING INFORMATION
Stock Number Standard Meter DPM 742-BL IP67 / NEMA 4X Bezel BEZ 700-IP
ELECTRICAL SPECIFICATIONS
Specification Min. Typ. Max. Unit
Accuracy (overall error) * 0.05 0.1 % (±1 count) Linearity ±1 count Sample rate 2.5 samples/sec Operating temperature range 0 50 °C Temperature stability 200 ppm/°C Loop Volt Drop 5 5.6 V Supply current 4 20 mA Backlight supply voltage 4.75 5.0 ** V d.c. Backlight supply current @ 5V d.c. 30 50*** mA Full scale reading (@20mA) 0 1999 Count Offset adjustment range -1900 +1900 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.
LASCAR ELECTRONICS LTD. MODULE HOUSE WHITEPARISH WILTSHIRE SP5 2SJ UK TEL: +44 (1794) 884567 FAX: +44 (1794) 884616 E-mail: sales@lascar.co.uk
Specifications liable to change without prior warning DPM 742-BL Issue 2 August/2004 M.C. Applies to DPM 742-BL/2
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
www.lascarelectronics.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 742-BL 4-20mA Loop Powered Indicator with Backlighting
DIMENSIONS
All dimensions in mm (inches)
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
30 (1.18)
17.7 (0.7)
6.1 (0.24)
1.6 (0.06)
13.0 (0.51)
8.25 (0.32)
13.5 (0.53)
Insulating Washer
FUNCTIONAL BLOCK DIAGRAM
BL+
BL-
I+
I-
4-20mA
Vdc
8
1
Shake-proof Washer
21
3
CONNECTIONS (rear view)
JA JB
Offset
DP 321
Span
Lk1
I+ I- BL+ BL-
Specifications liable to change without prior warning DPM 742-BL Issue 2 August/2004 M.C. Applies to DPM 742-BL/2
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