INFICON Composer Gas Concentration Controller User Manual
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Composer Operating Manual
STEADY . . . . . . . . . . . . . . . . . . . . A green LED that is illuminated when the
measured concentration value has been
steady for 10 seconds. Its presence
indicates that the Instrument System’s
Reference Zero may be successfully set.
The particular criteria used to light this LED
is that the frequency has been within +/-
2.0 Hz for 10 seconds.
USER SET ZERO . . . . . . . . . . . . . A green LED that is illuminated when the
Instrument System has been calibrated
and no longer is using the factory set
Reference Zero. The Instrument System
automatically reverts to the factory set
Reference Zero when any of the gas
related parameter values or Transducer’s
temperature are modified.
RECEIVING . . . . . . . . . . . . . . . . . . A green LED that is illuminated whenever
data is arriving on the digital link.
SENDING . . . . . . . . . . . . . . . . . . . A green LED that is illuminated whenever
the controller is transmitting data on the
digital link.
HALT . . . . . . . . . . . . . . . . . . . . . . . A red LED that is illuminated when the CPU
is not properly executing code and the
watchdog timer has not been reset. The
instrument is not measuring or controlling
when this light is illuminated. This indicator
should not illuminate. If it does, push the
Controller’s POWER switch off and then
on. If the indicator illuminates after this
POWER off/on sequence, return the
controller to the Service Center (refer to
WARNING . . . . . . . . . . . . . . . . . . . A red LED that illuminates in various
repetitive blinking patterns to indicate
improper operation. See
for patterns and
error code extraction.
Power LED . . . . . . . . . . . . . . . . . . A green LED located next to the
Controller’s POWER switch that
illuminates when the Controller is
connected to a 24 V power source, power
is applied and the Controller’s POWER
switch is on.