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Getting Started Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments 34
3.7.2. Warm Up
During the warm-up period various portions of the instrument’s front panel may behave as indicated in
Table 3-8.
Table 3-8: Front Panel Display During System Warm-Up
NAME COLOR BEHAVIOR SIGNIFICANCE
Conc field N/A
Displays current,
compensated CO
2
Concentration
This is normal operation, but deemed inaccurate during the
warm-up period.
Mode field N/A
Displays current
mode, e.g.,
SAMPLE”
Instrument is in Sample mode but is still in the process of
warming up. (DAS holdoff period is active)
Param field N/A
Displays menu items
and messages.
Refer to Table 3-9 for a list and descriptions of warning
messages.
STATUS LEDs
Sample Green On
Unit is operating in sample mode; front panel display is
being updated.
Flashes On/Off when adaptive filter is active
Cal Yellow Off The instrument’s calibration is not enabled.
Fault Red Blinking
The analyzer is warming up and hence out of specification
for a fault-free reading. Various warning messages appear
in the Param field.
3.7.3. Warning Messages
Because internal temperatures and other conditions may be outside be specified limits during the
analyzer’s warm-up period, the software will suppress most warning conditions for 30 minutes after power
up. If warning messages persist after the 30 minutes warm up period is over, investigate their cause
using the troubleshooting guidelines in Section 11 of this manual.
To view and clear warning messages, press:
SAMPLE HVPS WARNING CO2 = 0.00
TEST CAL MSG CLR SETUP
Make sure warning messages are
not due to real problems.
Press
CLR
to clear the current
message.
If more than one warning is active, the
next message will take its place
Once the last warning has been
cleared, the analyzer returns to
SAMPLE
mode
SAMPLE
RANGE=500.000 PPM
CO2 = 0.00
< TST TST > CAL
MSG
CLR SETUP
SAMPLE
HVPS WARNING
CO2 = 0.00
TEST CAL MSG
CLR
SETUP
TEST
deactivates warning
messages
MSG
activates warning
messages.
<TST TST
> keys replaced with
TEST
key
NOTE:
If the warning message persists
after several attempts to clear it,
the message may indicate a
real problem and not an artifact
of the warm-up period
Table 3-6 lists brief descriptions of the warning messages that may occur during start up.