After The Bump Test; Calibration - MSA Altair 5X Mode D'emploi

3.7.3 After the Bump Test

After all installed sensors pass the Bump Test, the √ symbol displays on
the MEASURE page. This √ symbol appears on the:
• color display in the upper feature bar
• monochrome display in the lower-right corner.
If any sensor was not Bump Tested, or fails the Bump Test, the √
symbol does not display.
The color display:
• temporarily shows the √ symbol at each gas reading for
successfully Bump Tested sensors
• √ symbol is then replaced by the present gas reading.
The monochrome display does not show individual gas reading
√ symbols.
The √ symbol on the color display feature bar and the monochrome
display lower-right corner shows for 24 hours after the Bump Test.
If a sensor instrument fails the Bump Test, calibrate the instrument as
described in Section 3.8.

3.8. Calibration

The ALTAIR 5X instrument can be calibrated either manually by using
this procedure or automatically by using the Galaxy Test System. See
Section 3.9 for additional Galaxy information.
The use of the demand regulators listed in Section 6.2 is
recommended.
Attention! Special conditions with toxic gases!
Reactive toxic gases (chlorine, ammonia, chlorine dioxide)
have the property of diffusing into the rubber and plastic
tubes so that the volume of test gas available in the
instrument would no longer be sufficient to correctly
perform instrument calibration.
For this reason, when calibrating the instrument with
reactive toxic gases, certain prerequisites are required;
otherwise, incorrect calibration could result:
3-18
! WARNING