INFICON T-Guard Leak Detection Sensor User Manual

Page 38

Installation

jina

e 4

.fm

Tech

l Ha

To change these settings, select the appropriate pin with the UP and DOWN arrows
on the left side of the display.
Then select the desired setting from the list of settings with the UP and DOWN
buttons on the right side of the display. Press OK to save your settings.
A graphic with all selected settings will be displayed for your reference.
Confirm with OK again.

INV CYCLE ACTIVE high-resistance means that the T-Guard™ Leak Detection

Sensor is performing a measurement cycle. This includes
automatic purging and reference measurement in Carrier Gas
mode. There is no measuring cycle in Continuous Measure-
ment mode. That is the reason why the output is always high-
resistive.

INV STANDBY

high-resistance means that the T-Guard™ Leak Detection
Sensor is just in Standby mode

INV ERROR

high-resistance means an error has occurred

INV WARNING

high resistance means there is an outstanding warning

INV ERROR / WARN high-resistance means an error has occurred or there is an

outstanding warning

INV CAL ACTIVE

high-resistance means a calibration is running right now

INV REC. STROBE

high-resistance means the recorder output is invalid for 300 ms
because of changing the decade of LR Mantissa and LR
Exponent.

INV MEASURE

high-resistance means that the T-Guard™ Leak Detection
Sensor is just measuring. The leak rate of the last measure-
ment is on when this output and also the REC STROBE output
are high-resistive.

FINE / GROSS

high-resistance means that the T-Guard™ Leak Detection
Sensor is just in GROSS mode

INV GROSS LEAK

high-resistance means the highest trigger value was exceeded
by at least the factor 5.

INV CONTAMI-
NATED

high-resistance means the sensor was contaminated with too
much helium. In this case, immediately purge the reference
line with external air or nitrogen to decontaminate the sensor.

Fig. 5-3 Selecting the PLC Outputs

Signal

Explanation