REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)
Issue 2. October 2011
26
Set zero
PRESS DISPLAY
• Select command 10–0
R
SET ZERO
Display shows reading of head 1: e.g.
h1:2
• Select required head. Current reading shown.
h2:–3
• Set display to zero
h2:0
• Select next required head
h3:–2
• Confirm setting. Command exits
R
10–0:h2
NOTE: after adjustment of the zero level, the span setting must also be checked and,
when necessary, adjusted.
Troubleshooting
Cannot set display to zero:
• Limit of adjustment range reached. The transmitter signal must be between 3mA and
5mA. Check and if necessary adjust the output of transmitter to 4.0mA ±1mA.
Set span
PRESS DISPLAY
• Select command 10–1
R
SET SPAN
Display shows reading of head 1: e.g.
h1:2
Apply gas to measuring head, or manually set output
of transmitter, e.g. to 12mA.
• Select required head. Reading shown.
h2:48
• Set display to appropriate reading, e.g. 50
h2:50
• Repeat for other heads
h3:–2
• Confirm setting. Command exits
R
10–1:h2
NOTE: the span point can only be adjusted by ±1mA at 20 mA. If you cannot set the
display to the correct reading the transmitter may need re-calibrating.
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