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.
