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Calibration
5 Calibration
Calibration is the process of applying a known quantity of gas to the transmitter so that the trans-
mitter can adjust the precision and accuracy of the measurements made in normal operating
mode. This process ensures that gas measurements are as accurate as possible.
Calibration Warnings - Read before Calibrating
Although TG5000 sensors are factory calibrated, another calibration is recommended once the
unit is installed in its final environmental destination.
WARNING!
Use zero gas when zeroing the TG5000 transmitter if there is any possibility of background gas.
Otherwise, improper calibration could occur.
For optimal sensor performance, allow sensor to acclimate to application conditions for 24 hours
before performing an initial calibration.
Perform calibrations 24 hours after initial startup and at a frequency identified in section 5.2 "Cali-
bration Frequency" and 5.3 "Calibration Frequency for XCell Sensors with TruCal and Diffusion
Supervision (H
2
S & CO only)".
Failure to follow the above warnings can result in serious personal injury or loss of life.
5.1 Calibration Equipment
A gas cylinder with a known concentration of gas appropriate for the range of measurement is
needed. Sensors come with preset span gas values appropriate for the measurement range. See
Tab. 14 for Default Span Values by Sensor Type. Calibration kits are available from MSA for cali-
bration of the TG5000. The kits come housed in a convenient carrying case and contain all items
necessary for a complete and accurate calibration, including a regulator, tubing, and Calibration
Caps. See Tab. 16 to select the appropriate kit for the sensor type. The calibration kit can also be
ordered without a gas cylinder.
US
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