Sensors should be powered at least one half hour before any
calibration attempt is made.
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.
Non-combustible Chemicals that
Reduce Sensor Sensitivity
• Silanes, Silicates, Silicones and
Halides (compounds
containing Fluorine, Chlorine,
Iodine or Bromine)
• TABLE 2-1 lists interferants for
electrochemical sensors.
When it is determined that calibration
adjustments are required, the
Toxgard II Monitor provides a
one-man, non-intrusive method of
adjustment at the unit.
To calibrate the unit, the internal
push-buttons or one of the
following accessories can be used:
• Calibrator P/N 809997
(FIGURE 2-3)
• Controller P/N 809086
(FIGURE 2-4)
Calibrator
The Calibrator allows the following
functions:
• Zero
• Calibration (zero and span)
• Display address for digital
output models.
Toxgard II Monitor Controller
The Controller also provides the
above functions and access to the
additional following features:
Figure 2-3.
Ultima
®
Calibrator
Figure 2-4.
Ultima
®
Controller
Chapter 2, Start-up
2-4
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