Chapter 3
Calibration
The Toxgard II Gas Monitor provides non-intrusive calibration
through the use of the Calibrator or Controller. The unit can also
be calibrated using the internally-mounted "CAL" push-button.
NOTE: The Calibrator and Controller are compatible with both
the Ultima Gas Monitor and the Toxgard II monitor.
When calibrating any Toxgard II Gas Monitor, refer to the
Calibration Kit instructions.
When first placing the Toxgard II Gas Monitor into operation it is
good practice to perform a calibration. When replacing the
sensor, it is necessary to do an initial calibration which allows the
unit to store the initial sensor parameters for proper end-of-life
indication. Refer to Chapter 3, "Initial Calibration."
Read the appropriate calibration instructions before attempting an
actual calibration. Also, identify and become familiar with all of
the calibration components. During the calibration, it is necessary
to quickly apply the span gas to the unit. Prior connection of the
calibration components will aid in the ease of unit calibration.
Equipment Required
Three calibration kits (numbered 40, 41, and 54) are available
from MSA for diffusion calibration of Toxgard II Gas Monitors.
Kit 40 is also used to calibrate the Toxgard II Air Line Monitor.
Calibration Kits 42 and 43 are used to calibrate Toxgard II
monitors with pumped samples. All Calibration Kits are housed in
a convenient carrying case and contain all items necessary (less
gas) for a complete and accurate calibration.
The check or calibration gases can also be carried in the case.
See TABLE 3-1 for the appropriate zero and span gas cylinders
for your Toxgard II Gas Monitor.
"
WARNING
These calibration kits contain zero caps in place of zero calibration
gas. These caps can only be used when the ambient air does not
contain the gas the monitor is detecting. If there is any doubt, use
zero gas when zeroing the Toxgard II Monitor; otherwise, improper
calibration could occur.
Chapter 3, Calibration
3-1
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