MSA SUPREMATouch MCP 20, Operating Manual

Page: 33 / 241

33
Entering System Parameters
GB
SUPREMATouch
Alarms Subwindow
Alarms
Alarms can be latching or non-latching (also see Measuring Points submenu).
Non-latching alarms:
When a signal exceeds the alarm threshold, a new alarm is triggered and the corresponding LED
flashes at a frequency of 0.5 Hz. Pressing the ACKNL (acknowledge) key makes the LED change
to ‘steady state’. When the signal is below the alarm threshold, the LED will turn off, regardless of
whether the alarm has been acknowledged or not. For non-latching alarms, the RESET key has
no effect.
Latching alarms:
When a signal exceeds the alarm threshold, a new alarm is triggered and the corresponding LED
flashes at a frequency of 0.5 Hz. Pressing the ACKNL (acknowledge) key makes the LED change
to ‘steady state’. When the signal no longer exceeds the alarm threshold, the LED remains in
‘steady state’ if the alarm has been acknowledged, or in the ‘flashing state’ if the alarm has not
been acknowledged. If the signal no longer exceeds the alarm threshold and the alarm has been
acknowledged, the LED is extinguished by pressing the RESET key. If the signal still exceeds the
alarm threshold, pressing RESET has no effect.
In the
Alarms subwindow, parameters can be set for up to four alarm levels for the selected input.
A limit value can be set for each alarm to trigger either on a rising or falling input signal. In addition,
relay outputs can be selected to operate if an alarm occurs. For every alarm,
latching or non-
latching parameters can be set.
Fig. 17 “Alarms” sub-window
Test Gas
Selection,
empty by
default
Contains a list of supported ‘Test gases’ to calibrate the span-
point of the sensors.
Set the test gas that will be used to calibrate the sensor at the
selected input.
(Test Gas)
Valve No.
Selection,
empty by
default
Contains a list of available outputs that can be used as test gas
valve output.
This valve will be used during the calibration of the input. If no
valve should be used, select
free .
Auto Button
Using this button, certain fields are filled with data that is auto-
matically detected, (i. e. read-out via HART).
Field Field Type Function