Martel Electronics DPM942 - Manual (Page 2)

TERMINAL FUNCTIONS
CALIBRATION
SAFETY
1. I+ Positive current input.
2. I- Negative current input.
3. DP3 1.000
4. DP2 10.00 Decimal point inputs.
5. DP1 100.0
6. DS Decimal Point select. Connect to required DP input to display decimal point.
The meter is supplied calibrated to read 000 for 4mA loop current and 1000 for 20mA.
To re-calibrate:
1. Apply 4mA to I+/I- and adjust 'OFFSET' to read 000.
2. Apply 20mA and adjust 'SPAN' to read 1000.
3. Repeat steps 1 and 2 until there is no more adjustment of 'SPAN' and 'OFFSET' required to give desired readings.
To comply with the Low Voltage Directive (LVD 93/68/EEC), input voltages to the module’s pins must not exceed 60Vdc. If voltages to the measuring
inputs do exceed 60Vdc, then fit scaling resistors externally to the module. The user must ensure that the incorporation of the DPM into the user’s
equipment conforms to the relevant sections of BS EN 61010 (Safety Requirements for Electrical Equipment for Measuring, Control and Laboratory Use).
VARIOUS OPERATING MODES
ON-BOARD LINKS: In order to quickly and easily change operating modes for
different applications, the meter has several "on-board links". They are designed
to be easily opened (cut) or shorted (soldered).
The DPM 942 is powered from the 4-20mA signal loop and needs no other power
supply. Ensure correct polarity when connecting. Normally
SHORTED
Cut to
OPEN Normally
OPEN
Solder to
SHORT
PANEL FITTING
DP2 selected in this example. 4-20mA
Transmitter
I+
I+
I-
I-
1
2
DP2
DS
DPM 942
4
6
Specifications liable to change without prior warning DPM 942 Issue 5 August/2002 M.C. Applies to DPM 942/3
LASCAR ELECTRONICS LTD.
MODULE HOUSE, WHITEPARISH,
WILTSHIRE SP5 2SJ UK
TEL: +44 (0)1794 884567 FAX: +44 (0)1794 884616
E-mail: [email protected]
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: [email protected]
LASCAR ELECTRONICS INC.
3750 West 26th Street,
Erie, PA 16506 USA
TEL: +1 (814) 835 0621 FAX: +1 (814) 838 8141
E-mail: [email protected]
PO Box 770, Londonderry, NH 03053 1-800-821-0023
www.martelcorp.com