Scott Safety Protege, User Manual

Page: 64 / 104

40
CHAPTER 5: MAINTENANCE
087-0038 REV L SCOTT SAFETY
4
If display indicates IS AIR CLEAR?, and atmosphere has been verified free, press
the Right Operation Button to start the Zero Calibration.
5
Wait for device to complete Zero Calibration. If passed, the LCD displays APPLY
GAS. See
Figure 26 .
Figure 26 Zero Calibration Display - Passed
6
Wait for device to complete Zero calibration. If failed, the LCD displays FAILED
and the appropriate failing sensor(s). See
Figure 27 .
Figure 27 Zero Calibration Display - Failed
7
If Span calibration is desired, continue to See “Span Calibration” on page 40.
8
If Span Calibration is not desired, either press the Left Operation Button to exit, or
allow 80 second timer to expire.
9
When the LCD displays CAL STOPPED, press either Operation Button (Left or
Right) to exit calibration mode.
Span Calibration
This section describes how to perform Span Calibration.
Warning: Read, understand and follow the instructions, including labels and MSDS
provided by the manufacturer of the calibration gas. Failure to do so may result in
injury or death.
For precise K-Factors when performing a Span Calibration of a combustible sensor.
See
“Sensor K-Factors” on page 64.