MSA SUPREMATouch MCP 20, Руководство по эксплуатации

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Calibration
GB
SUPREMATouch
7.3 First Calibration with Pre-Adjustment
Passive Detectors
The first calibration for passive detectors is carried out as described in chapter 7.2 "Calibrating
Passive Detectors". Carrying out a first calibration deletes the calibration history of the sensor.
During a first calibration, it is not possible to perform a separate zero calibration.
NOTICE
The first calibration may not be performed until after the preadjustment of the MAI module (chapter
13.4 "Preadjusting Passive Detectors") has been properly completed for all connected passive
detectors.
Signals U
A
above 600 mV are not valid for the zero point calibration. During the sensitivity calibra-
tion, the value in the signal field must exceed the value in the zero gas field by at least 200 mV.
NOTICE
The first calibration may not be performed until after the preadjustment of the MAI module (chapter
13.4 "Preadjusting Passive Detectors") has been properly completed for all connected passive
detectors.
Signals U
A
above 600 mV are not valid for the zero point calibration. During the sensitivity calibra-
tion, the value in the signal field must exceed the value in the zero gas field by at least 200 mV.
Active Transmitters
A first calibration on the SUPREMATouch system is not required for active transmitters (sensors
with a 4–20 mA output). The first calibration is to be performed directly at the sensor in accordance
with the operating and maintenance instructions of the sensor. As default values, the
SUPREMATouch system interprets an input current of 4 mA as 0% of the measuring range and
an input current of 20 mA as 100% of the measuring range.
NOTICE
In case of sensors that do not send a maintenance level during calibration, it is recommended to
inhibit the input in the
Setup/Measuring Points menu during the first calibration.
As part of the start-up procedure, it is recommended that the correctness of the displayed values
be checked either by supplying gas to the sensors or by supplying a constant current to the MAT
module from a source of constant current. The method for correcting the 4–20 mA input is
described in chapter 7.4 "Calibrating Active Transmitters".
NOTICE
In case of sensors that do not send a maintenance level during calibration, it is recommended to
inhibit the input in the
Setup/Measuring Points menu during the first calibration.
As part of the start-up procedure, it is recommended that the correctness of the displayed values
be checked either by supplying gas to the sensors or by supplying a constant current to the MAT
module from a source of constant current. The method for correcting the 4–20 mA input is
described in chapter 7.4 "Calibrating Active Transmitters".
7.4 Calibrating Active Transmitters
For active transmitter (sensors with an output of 4–20 mA), calibration is to be carried out directly
on the sensor in accordance with the sensor’s operating and maintenance instructions. As default
values, the SUPREMATouch system interprets an input current of 4 mA as 0% of the measuring
range and an input current of 20 mA as 100% of the measuring range.
For sensors which do not transmit a maintenance level during calibration, MSA recom-
mends to lock the measuring point during calibration in the
Setup/Measuring point
menu.