MSA SUPREMATouch MCP 20, Руководство по эксплуатации

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Calibration
GB
SUPREMATouch
7.2 Calibrating Passive Detectors
Before calibration, make sure that the sensors have warmed up.
Maximum 32 sensors can be calibrated at once.
Warm-up time depends on the sensors and on the measuring components (see the appropriate
sensor data, chapter 16 "Sensor Data").
The required zero and test gases as well as test adapters and hose connections (see the sensor
operating and maintenance instructions) for supplying the gas are necessary for the successful
completion of the calibrations.
The duration and flow rate of the zero and test gas supplies can be found in the operating and
maintenance instructions for the sensor as well as the sensor data sheet (see chapter 16 "Sensor
Data") for the sensor in question.
NOTICE
MSA recommends using a test gas with a concentration of approximately 50% of the measuring
range of the measuring point. Under no circumstances should the test gas concentration be less
than 25% of the measuring range. If possible, the test gas (the gas used to calibrate the sensor)
and the measurement gas (the gas to be monitored) should be identical. If this is not the case and
a reference gas is used, the response factor of the gas concentration used must be known (see
operating and maintenance instructions for the sensor, reference curve).
Exceptions to this rule are sensor types D-8101, D-8113, DF-8201, DF-8250, DF-8401 and DF-
8603. Because of the nonlinear output signal of these sensors, they should always be calibrated
to the rating (100% of the measuring range), provided that this is below the LEL (lower explosion
limit).
For a two-man calibration, person 1 (at the SUPREMATouch) and person 2 (at the sensor in ques-
tion) must perform the following steps:
2-Man Calibration
Person 1 Person 2
(1) Select Maintain/Calibration/Standard
menu.
(2) Select input to be calibrated in “Measuring
Point” field
(3) Enter gas concentration in Zero Gas field:
a) Enter the concentration of the test gas
in the zero gas (usually 0%), not the
concentration of the zero gas.
(4) Enter test gas concentration in Test Gas
field.
(5) If test gas used is different from reference
gas entered in the Setup/Inputs&Outputs/
Measuring points menu, change the entry
in field Test Gas of the Calibration
submenu.
(6) Start calibration with Start 2-Man button.
(7) Supply zero gas via test adapter to the
sensor assigned to the selected
measuring point (duration and flow rate
according to sensor operating and mainte-
nance instructions).