To quit a menu at any stage, press the (-) and (+) buttons
together.
Caution: the settings operations in this paragraph are reserved for
authorized, trained personnel because they may compromise
detection reliability.
The user must refer to the gas detector manual for calibration of
detectors.
The only way to verify the accuracy of the detection function of the sensor(s)
linked to the MX 32 controller is through calibration using a test gas.
Gas detectors are safety devices. Accordingly, Oldham recommends regular
testing of fixed gas detection installations. This type of test consists of
injecting a standard gas of sufficient concentration into the sensor to set off
the pre-adjusted alarms. This test does not, in any event, replace a full
calibration of the sensor.
Oldham also recommends completely calibrating detectors with a known and
certified concentration of gas every 3 or 4 months.
Frequency of gas testing depends on the industrial application in which the
sensors are used. Inspection should occur frequently during the months
following installation start up, later it may be spaced out if no significant
problem is observed. Time intervals between tests should not exceed 3
months.
If a detector does not react upon contact with gas, it must be calibrated.
Calibration frequency should be adapted based on test results. However, it
should not be greater than one year.
Oldham recommends using a test gas to calibrate detectors.
The site manager is responsible for implementing the safety procedures on
his site. Oldham is not responsible for implementing safety procedures.
The Calibration menu will allow the user to perform zero control and settings
in a clean environment and the sensitivity of the test gas.
Calibration can be performed:
■ After initialization; see the following page.
■ For preventative maintenance (minimum and regular service); see
page 28.
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