Calibration; Calibrating The Sirius Multigas Detector - MSA SIRIUS Manuel D'instructions

6. Calibration

6.1 Calibrating the SIRIUS Multigas Detector

Each SIRIUS Multigas Detector is equipped with an Autocalibration feature to make unit
calibration as easy as possible. The Autocalibration sequence resets instrument zeroes
and adjusts sensor calibration for known concentrations of calibration gases.
Table 2. Autocalibration and Required Calibration Cylinders
SENSORS
Combustible
Oxygen
Carbon Monoxide
Hydrogen Sulfide
VOC
* Factory Default
NOTE:
Refer to 5. Setting up the Multigas Detector, for instructions on changing the Autocali-
bration expected gas concentrations if calibration gas with concentrations other than
those listed above will be used to calibrate the instrument.
The expected gas concentrations must match the gas concentrations listed on
the calibration cylinder(s). Failure to follow this warning will cause an incorrect
calibration, which will result in erroneous readings.
EXPECTED
GAS
CONCENTRATION*
1.45 vol% CH
4
15 vol%
60 ppm
20 ppm
100 ppm Isobutylene
FOUR-GAS
CYLINDER
(P/N 10053022)
x
x
x
x
Calibration
ISOBUTYLENE
(P/N D0715896)
x
33
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