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T2A Transmitter • 35
9. Zero and calibrate the detector as described on page 35.
Calibration
Calibration is the process of evaluating and adjusting the precision and accuracy of
measurement equipment. Although RKI calibrates every device at the factory, for best
accuracy, the detector SHOULD be calibrated in the environment where it is installed.
Calibration Frequency
A calibration should be performed EVERY thirty (30) days. Days since the last calibration
should NEVER exceed ninety (90) days. RKI recommends that you calibrate your device
regularly to ensure proper functionality and a safe work environment.
Materials
•
0.5 LPM fixed flow regulator with knob
WARNING: If calibrating with Cl
2
or HCl, a regulator must be dedicated for use with that
gas only. Do not use that dedicated regulator for any other gases, particularly
H
2
S.
•
calibration cup
•
calibration tubing
•
zero air cylinder (if not in a fresh air environment)
•
calibration cylinder or gas generator (For O
2
sensors calibrated with Manual Cal, RKI
recommends using 100% N
2
. For O
2
sensors calibrated with Auto Cal, RKI
recommends a concentration between 10 and 18% O
2
. For all other sensors, RKI
recommends using 50% of the full scale value of your detected gas.)
Nitrogen Dioxide
2 hours
Oxygen
Ozone
Phosphine
Sulfur Dioxide
Detection Gas
Warmup Time
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