DPM 742-BL LASCAR, DPM 742-BL Datasheet

Loop Powered Meter

DPM 742-BL

Manufacturer Part Number
DPM 742-BL
Description
Loop Powered Meter
Manufacturer
LASCAR
Datasheet

Specifications of DPM 742-BL

No. Of Digits / Alpha
3-1/2
Meter Function
4-20mA Loop Current
Meter Range
4mA To 20mA
Digit Height
12.7mm
Operating Temperature Range
0°C To +50°C
Meter Signal Input
Current
Character Size
0.5"
Accuracy
+/- (0.1 Of Input +/- 1 Count)
Rohs Compliant
NA
Lead Free Status / RoHS Status
na
DPM 742-BL
LASCAR ELECTRONICS LTD.
MODULE HOUSE
WHITEPARISH
WILTSHIRE
UK
TEL: +44 (1794) 884567
FAX: +44 (1794) 884616
E-MAIL: sales@lascar.co.uk
Specifications liable to change without prior warning
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.
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
ELECTRICAL SPECIFICATIONS
*** This specification linearly derates to 30mA @ 50°C.
• 12.7
• 4-20mA Loop Powered Indication
• Low Volt Drop
• Bandgap Reference
• Wide Adjustment Range
• Auto-polarity on Display
• IP67 / NEMA 4X Protection via BEZ 700-IP
Specification
Accuracy (overall error) *
Linearity
Sample rate
Operating temperature range
Temperature stability
Loop Volt Drop
Supply current
Backlight supply voltage
Backlight supply current @ 5V d.c.
Full scale reading (@20mA)
Offset adjustment range
** An external series resistor is required above 5V, see Applications.
* To ensure maximum accuracy, re-calibrate periodically.
Programmable Decimal Points
LED Backlighting (30mA @ 5V typ.)
mm (0.5") Digit Height
SP5 2SJ
A low drift bandgap reference circuit ensures accurate readings over a wide temperature range.
www.lascarelectronics.com
E-MAIL: us-sales@lascarelectronics.com
LASCAR ELECTRONICS INC.
DPM 742-BL
3750 WEST 26th STREET
TEL: +1 (814) 835 0621
FAX: +1 (814) 838 8141
PA 16506
ERIE
USA
ORDERING INFORMATION
4-20mA Loop Powered Indicator with Backlighting
Standard Meter
IP67 / NEMA 4X Bezel
-1900
Min.
0.05
4.75
0
5
4
0
Issue 4
Typ.
200
2.5
5.6
5.0
30
November/2006
+1900
50***
Max.
1999
0.1
±1
50
20
**
111-113 - HOW MING STREET, KWUN TONG,
M.C.
UNIT NOS. 6-8, 19/F FUTURA PLAZA,
No.: 695 - Page 1 of 4
LASCAR ELECTRONICS (HK) LIMITED
Applies to DPM 742-BL/3
E-MAIL:purchasing@lascar.com.hk
% (±1 count)
samples/sec
ppm/°C
Stock Number
DPM 742-BL
BEZ 700-IP
Count
Count
count
V d.c.
Unit
mA
mA
°C
V
FAX: +852 2389 6535
TEL: +852 2389 6502
HONG KONG
KOWLOON,
Page 2 of 4
Page 2 of 4
LED

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DPM 742-BL Summary of contents

Page 1

... DPM 742-BL 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. ...

Page 2

... Loop Powered Indicator with Backlighting 55.0 (2.17) 46.7 (1.84) 60 (2.36) Shake-proof Washer 2 CONNECTIONS BL+ BL DPM 742-BL Issue 4 November/2006 www.lascarelectronics.com 1.6 (0.06) 2.8 (0.11) dia 6.1 (0.24) 3 (rear view Offset DP Lk1 Span I+ I- BL+ BL- M.C. Applies to DPM 742-BL/3 Page Page No.: 695 - Page 13.0 (0.51) ...

Page 3

... Remove Jumper Link Lk1 and place it back on the desired Decimal Point (DP1 in this case). 6. Apply 4mA between the - and + screw terminals. 7. Adjust the Offset potentiometer so the DPM 742-BL indicates the desired reading at 4mA: -40.0 8. Adjust Span and Offset as necessary for optimum accuracy. First apply 20mA and adjust Span untill the reading is 150 ...

Page 4

... DP3 Displays decimal point DP3 (1.999). Lk1 Used during calibration (see above). APPLICATIONS The DPM 742-BL is powered from the 4-20mA signal loop and needs no other power supply. The LED backlighting requires a separate d.c. power supply. Ensure correct polarity when connecting 4-20mA ...

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