Non-combustible Chemicals that Reduce Catalytic
Sensor Sensitivity
Catalytic Combustible sensors
located in areas where
non-combustible chemicals may
leak, particularly ones known
to reduce the sensitivity (see
following list) should be calibrated
after such exposures.
• Silanes, Silicates, Silicones
and Halides (compounds
containing Fluorine, Chlorine,
Iodine or Bromine)
• TABLE 2-1 (at the end of this
chapter) lists interferants for
electrochemical sensors.
When it is determined that
calibration adjustments are
required, the Ultima Gas Monitor
provides a one-man, non-intrusive
method of adjustment at the unit.
To calibrate the unit, one of the
following accessories is necessary:
• Ultima Gas Monitor Calibrator
P/N 809997 (FIGURE 2-3)
• Ultima Gas Monitor Controller
P/N 809086 (FIGURE 2-4)
Ultima Gas Monitor
Calibrator
The Ultima Calibrator allows the
following functions:
• Zero
• Calibration (zero and span)
• Changing of Multiplex address
for multiplex output models.
Figure 2-3.
Ultima Gas Monitor Calibrator
Figure 2-4.
Ultima Gas Monitor Controller
Chapter 2, Start-up
2-4
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