MSA SUPREMATouch MCP 20, Руководство по эксплуатации

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Calibration
GB
SUPREMATouch
Checking the Display
If, in spite of correctly calibrated active transmitters, the expected values (0% of the measuring
range for a signal current of 4 mA and 100% of the measuring range for a signal current of 20 mA)
do not appear on the SUPREMATouch, the calibration on the SUPREMATouch must be checked
and corrected if necessary.
For this purpose, either the signal current of the connected sensor or a variable power source can
be used. If the signal current of the sensor is used, make sure that the sensor is supplying the
correct values.
To correct a possibly incorrectly set measuring point, change the selected type of sensor:
(1) Go to the Setup/Input and Outputs/Measuring Points/Sensor Data menu.
(2) Select any other type of sensor.
(3) Confirm the selection with OK .
(4) Re-select the type of sensor connected and confirm with OK .
The measuring point will be set back again to the standard setting of 4 mA = 0% of the
measuring range and 20 mA = 100% of the measuring range.
NOTICE
During this calibration the measuring point must be inhibited manually (alarm rejection).
NOTICE
Adjustments on the MAI module are neither necessary nor possible for active transmitters.
Calibration with a Variable Power Source
(1) Lock the measuring point in question in the Setup/Input and Outputs/Measuring points menu
to prevent triggering an alarm.
(2) Detach cable connections of sensor to MAT module.
(3) Connect the variable power source to the MAT module as follows:
MAT module terminal 1: + pole of the power source (signal)
MAT module terminal 4:–pole of the power source (GND)
(4) Set output current of power source to 4 mA.
(5) Unlock measuring point in question in the Setup/Input and Outputs/Measuring points menu
to allow a calibration.
(6) Select Maintain/Calibration/Standard menu.
(7) Select measuring point to be calibrated in Measuring Point field.
(8) Enter 0 % of measuring range in the field Zero Gas as zero gas concentration.
(9) Enter 100 % of measuring range in the field Test Gas as test gas concentration.
(10) After tapping the Start button, enter the required password or use the key switch.
End Calibration submenu displays.
Current measurement value UA of the measuring point to be calibrated will appear in Sig:
field.
For an input current of 4 mA, a value of 400 mV ± 10 mV should be displayed.
In the field Ux= no value or ***** is displayed.
(11) If value U
A
is within tolerance range (400 mV ± 10 mV), confirm with Store button.
The value will be appear in CAL-ZERO.