Chemgard Infrared Gas Monitor
Section 4
Calibration
Introduction
As with any type of gas monitor, the only true
check of its performance is to apply gas directly
to the sensor. The frequency of the calibration
gas test depends on the operating time and
exposures of the sensors. New monitors should
be calibrated more often until the calibration
records prove stability. The calibration frequency
can then be reduced to the schedule set by the
safety officer or plant manager.
Perform the calibration procedure regularly and
maintain a log of calibration
adjustments.
Calibration frequency may increase for a variety
of reasons. If calibration cannot be performed at
any step, STOP; consult MSA at 1-800-MSA-INST.
Calibration Equipment
Equipment needed:
•
Calibration Kit (MSA ATO #50; FIGURE 4-1)
Item 1 - Tube and Tee Assembly
(P/Ns 603806 and 636866)
Item 2 - 1.5 LPM Flow Controller (P/N 478358)
Item 3 - Connector Assembly (P/N 711533)
Item 4 - Span Gas Scrubber (P/N 803874)
NOTE: Replace protective caps after
use.
Item 5 - Zero Gas Scrubber (P/N 803873)
NOTE: Replace protective caps after use
.
Figure 4-1.
Kit Components
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