INFICON Sensistor ISH2000 Hydrogen Leak Detector - Manual (Page 51)

EN- 51 Sensistor ISH2000 Technical Reference Manual (TRM)
C 201
APC settings
APC is an abbreviation for Active Probe Control. The APC function is for the
control of an active probe that has a built-in alarm, valves or pumps via Probe
Control Port.
Different probes require controls therefore, it is possible to download different
drive routines for the instrument from a PC.
There is a possibility to adapt how to measure by adjusting the timers and Purge
Level.
Probe Type
Select the connected probe. Choose between “Hand Probe” and another
probe driver installed from the disc delivered with active probe (if ordered).
APC Time A-D
Adjustable timer used by the APC system. Select a APC timer and press “Enter”
to display specific use of this timer. APC timer can be used for general purposes
in a custom APC program.
Purge Level
Signal level controlling the Purge_Level APC Triggers. Standard probes that sup-
port active sampling use the Purge Level for fast interruption of sampling that
result in high gas signals.
Setting Purge Level equal to, or just above, Reject Level will give the fastest pos-
sible cycle times for those probes.
Quick purging also enhances signal repeatability.
Note: Purge level interrupts active sampling of APC probes. This means that
higher signals will be underestimated as the sensor is purged before full signal
has developed.
Reset Signal
Reset the sensor level in Analysis mode and Detection mode.