10
Span Gas Calibration
To perform span gas calibration, press and
hold the button . Release when “go” displays
continuously without flashing on and off.
The “gAS” and span gas preset value switches
back and forth on the screen . During these 10
seconds, connect the span gas to the monitor .
(
See picture on page 11.
)
When the monitor detects a change in gas
concentration or after 10 seconds of idle
time, or when the key is pressed, the next
countdown timer begins (time depends on the
type of sensor) .
Span calibration fails when the monitor does
not detect any change in gas concentration .
In the latter case, the “Err” (error) message
appears on the screen, the monitor beeps and
the LED lights up . In either case, begin span
calibration again .
When span calibration is complete, “dn” (done)
and the real time reading briefly appear on the
screen before advancing to the next submenu .
