Technical Manual Series 3000 MkII Gas Detector - Merkantile

SERIES 3000 MKII TECHNICAL MANUAL
S3KMKIIMAN_MAN0878_Issue 1_01-10
14.2 Detector operational life
Typical life of a toxic gas sensor is dependant on the application, frequency and
amount of gas exposure. Under normal conditions (3 monthly visual inspection and 6
monthly test/re-calibration) the toxic sensor has an expected life equal to or greater
than the lifetime as listed below:
18 months for chlorine and chlorine dioxide sensors.
12 months for ammonia sensor. (See note below).
24 months for oxygen and other toxic sensors.
Refer to section 15 for sensor replacement procedures.
Caution: Oxygen deficient atmospheres (less than 6%V/V) may result in
inaccuracy of reading and performance.
Note: Ammonia electrochemical cells are reliable and suitable for applications where
no background concentration of ammonia exists. Under these conditions the cells are
expected to operate for 12 to 24 months.
These ammonia cells are of the consumptive type. Their operating life can be
adversely affected by continuous or excessive exposure to ammonia, or by
prolonged exposure to high temperatures and moisture.
To ensure continued detection availability it is recommended that the detectors are
regularly bump tested and a relevant cell replacement program be implemented.
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