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Rev. C | 2022.02
FCS - Operation Manual
If you want to review the current settings for each channel, press the + or - button to scroll
through the summary screen of each channel or use the keypad to enter the specific channel
number.
To change the settings, choose the channel number and use the + or - buttons or press the
yellow fields to use the keypad and change the values:
HIGH, MED and LOW
gas reading level at which the alarm is triggered.
Des or Asc
: Choose the direction of the alarm point - descending or ascending. For most
gases, the alarm direction is ascending (as the gas level increases, the alarm is set to go
off). For Oxygen, it is usually descending (as the oxygen level decreases, the alarm is set
to go off).
Diff:
Also referred to as hysteresis. This is the difference between the ON point and
OFF point of the alarm. For example, if the alarm is set to come on at 100 ppm and the
hysteresis is set for 10 ppm, the alarm will not turn off until the gas is below 90 ppm. This
prevents the alarm from chattering on and off repetitively if the gas fluctuates just above
and just below 100 ppm.
The Save button will turn green after a change has been made. If you are going through more
channels on the same screen, the system will autosave when you press the + or - to proceed
or return to the next channel number. If you press Home or Back, the change will not be
saved. You can choose to press Save if in doubt.
7.5 Quickly Enable / Disable Channels Only
This is an alternate way to enable / disable a channel, rather than using the Channel
Hardware screen (press Menu and enter passcode “3022” to enter the Config Channel menu
and select Channel Hardware). If a channel is disabled, it will show on the Channel Status
details display with a “d” at the end of the line.
NOTE:
While disabled, the gas readings provided by that channel will not be used to control
the relays and/or alarms. Data logging entries will not be recorded for a disabled channel.
Press Menu and enter passcode “2012” to enter the Set Alarm menu and select Channel
Disable
.