MSA ALTAIR 5X PID Operating Manual page 45

US
5.10.1 Zero Calibration Procedure
1. Press the p button for five seconds in Normal
Measurement page.
ZERO screen displays.
To skip the ZERO procedure and move directly to the
span calibration procedure, push the p button. If no
button is pushed for 30 seconds, the device prompts
user to perform a SPAN calibration before device
returns to the Normal Measurement page.
To perform ONLY a Fresh Air Setup at this time, press
the button. The device then performs a Fresh Air
Setup as described in 5.2 Turning ON and Fresh Air
Setup . When the Fresh Air Setup is complete, the
device returns to the normal Measure screen.
2. Press the q button to confirm the ZERO
screen, i. e. to execute zero calibration.
The message "SENSOR REFRESH"
displays, followed by the message "ZERO
CALIBRATION".
The "REFRESH" message does not appear if
a catalytic combustible sensor is not installed.
ZERO calibration starts.
A progress bar shows the user how much of
the calibration has been completed.
During the first moments of a ZERO calibration, the
combustible sensor reading may be replaced by a
moving display of "PLEASE WAIT". This is normal.
After the ZERO calibration is completed the device
displays either
"ZERO CALIBRATION PASS"
or
"ZERO CALIBRATION FAIL".
45 ALTAIR 5X PID
5 Operation