13
GG-6
Cal Mode
Calibration mode allows for sensor calibration
and maintenance by holding the relays in their
normal state, preventing unwanted alarms. If the
unit is left in Cal Mode, it will stay active for 48
hours and then return to normal operating mode.
Make sure the concentration values have dropped
below the warning and alarm setpoints before
exiting. The analog outputs are not affected by
calibration mode and are allowed to increase to
full scale. STEL and TWA values are not calculated
or updated during calibration mode.
ESC to exit from Calibration mode, then press YES
or NO to return to normal operating mode.
Last CAL Date
The last cal date shows the date and time at which
the system was last calibrated. When six months
has transpired from the last cal date, a Cal Due
flag will appear indicating the sensors need to be
calibrated. Holding the 6 key, and then pressing
the 7 key will reset the Cal Date, once the sensors
are calibrated.
Channel View (cont.)
If the STEL-TWA function is set to Active, the
real-time value is displayed, along with the time-
weighted average values for the 15 minute short
term exposure limit (STEL) and 8 hour time
weighted average (TWA). Alarm conditions will
also flash to indicate that those programmed
values have been exceeded.
An over-range condition is indicated by flashing
of the full-scale reading, followed by the
message “OVR”. This also indicates that the
sensor output is over 20 mA.
Main Menu
The main menu can be accessed by pressing the
menu key at any time. Use the alpha-numeric
keys to select a sub-menu, or NEXT to advance
to the next menu screen. ESC to return to the
normal operating screen.
Alarm Log
The alarm log captures every event in
chronological order, with the most recent event
displayed first. 10,000 events can be stored,
with the oldest events being automatically
truncated, once the alarm log is full. Time/date
stamp and event number are also displayed.
PREV or NEXT to scroll. Hold button in for turbo-
scroll. ESC to return to normal operating screen.
MENU to return to main menu screen.
