7 | Controlling the device using interfaces
INFICON
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T-Guard2_Operating-instructions-jina85en1-13-(2009)
The current state of all inputs and outputs is displayed. The relays can be switched for
testing:
1. Select “Test PLC output”.
2. Using the arrow keys, navigate to the output you want to test.
3. Select “Switch relay”.
Function
Meaning
START
Starts a measurement cycle. If the device was in standby, the start
is delayed by a few seconds.
STOP
Stops a measurement cycle. You will not receive a valid leak rate.
START/STOP
Start and stops a measurement cycle when a switch to/from HIGH
to/from LOW is made.
CAL
Starts a calibration. A successful calibration changes the calibration
factor.
PROOF
Starts the calibration check with the test leak rate.
CLEAR
Deletes errors and warnings. The device restarts after an error.
READY
Wakes the device from standby mode.
STANDBY
Switches the device to standby.
GROSS/FINE
Switches between GROSS and FINE measurement. Only available
for continuous measurement.
PURGE
Purges the measurement lines if the input signal is high. The signal
from the helium sensor is ignored. Only available when “Automatic
purge” is switched off.
INV START
Electrically inverted start command
INV STOP
Electrically inverted stop command
STOP/START
Stops and starts a measurement cycle when a switch to/from HIGH
to/from LOW is made.
INV CAL
Electrically inverted CAL command
INV PROOF
Electrically inverted TEST command
INV CLEAR
Electrically inverted delete command
INV READY
Electrically inverted ready command
INV STANDBY Electrically inverted standby command
FINE/GROSS
Switches between FINE and GROSS measurements. Only
available for continuous measurement.
INV PURGE
Electrically inverted purge command
