5 Calibration
Calibration is the process of applying a known quantity of gas to the transmitter so that the transmitter 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 S5000 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 S5000 transmitter if there is any possibility of background gas. Otherwise, improper calibration
could occur.
Use zero gas when zeroing IR700 sensors. Air contains CO
2
and cannot be used. Nitrogen is recommended as a zero 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 start up and at a frequency identified in 5.2 Calibration Frequency and 5.3 Calibration
Frequency for XCell Sensors with TruCal (H2S & CO only) .
XCell Sensors with TruCal (CO & H2S) with Calibration Alert enabled provide an indication for “Calibration Recommended”
and “Calibration Required’. When either indication is provided by the device, calibrate the sensor.
Failure to follow this warning can result in serious personal injury or death.
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.
All of the calibration hardware for XCell sensors is included in a convenient calibration kit. It includes a carrying case that can
fit two cylinders, a regulator, tubing, and any other accessories required for each sensor type. The calibration kit can be
ordered separately or as a single line item with the gas cylinder. See Table 16 for a complete list of calibration cylinders and
kits.
The Digital Toxic, Oxygen, and Catalytic Bead sensors share the same sensor body design and use the same calibration
hardware. The calibration kit for IR400 sensors is ordered separately (P/N 1400270-2) and contains a regulator, tubing, and
other calibration accessories specific to the IR400. The calibration kit for IR700 sensors is P/N 31478-1.
Passive sensors use different calibration hardware to accommodate the different sized sensor housing. Passive MOS sensors
can be calibrated with either calibration gas cylinders or ampules. See Table 16 for P/N details.
The sensor guard and rubber calibration cap should be removed after calibration.
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5 Calibration US
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