C1 Controller Users Manual
Revision 4.6
47
Figure 7.3
7.2.1
RADIO STATUS ALARMS - WIRELESS RECEIVER MODE
When an C1 channel’s
INPUT DATA FROM
menu is set for
WIRELESS RF900
, in
addition to processing the GASMAX ECX’s 10-bit “counts” value, it also receives status
bits indicating
Communications Error
,
Low Battery
and
Calibration
.
Communications Error
– Each channel’s 30-minute trend screens (Figure 7.4)
are very useful for diagnosing wireless problems since it indicates amount of time
since the most recent transmission was received. The down arrow on top of the
trend screen resets to far right each time a transmission is received by that
channel. When not in alarm, GASMAX ECX00’s transmit each 5-minutes so the
arrow should never progress past the 5-minutes interval. The C1 activates the
channel’s FAULT alarm and indicates
ComErr
if no transmission has been
received in 18 consecutive minutes.
Low Battery
status indicates the GASMAX ECX’s integral 3.6V lithium D cell
(part # 10-0293) has dropped to below 3.3V and should be replaced very soon.
LoBatt
is indicated on the C1’s LCD readout and the Alarm 3 LED flashes.
Relays are not energized by low battery conditions. The actual battery voltage of
each GASMAX ECX may be seen in the
INPUT DATA FROM
screen described
above in section 7.2.
Calibrations
performed at the GASMAX ECX force a transmission of 75 counts
(negative 15.62%) which may be indicated on the C1’s LCD readout by
In Cal
by
using the “Marker Menu” described in section 2.2.4b. Alarms are inhibited
during while the “Marker Value” of -15.62% is activated.
Figure 7.4
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