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M400E Ozone Analyzer Operator’s Manual Getting Started
3.5.2. WARM UP
The Model 400E photometric ozone analyzer requires a minimum of 30 minutes for all of its internal components
to reach a stable operating temperature. During that time, various portions of the instrument’s front panel will
behave as follows.
Table 3-7: Front Panel Display during System Warm-Up
NAME COLOR BEHAVIOR SIGNIFICANCE
Concentration
Field
N/A
Displays current,
compensated O
3
Concentration
N/A
Mode Field N/A
Displays blinking
“SAMPLE”
Instrument is in sample mode but is still in the process
of warming up.
STATUS LED’s
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 will
appear.
3.5.3. 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 Chapter 13 of this manual.
To view and
clear warning messages, press:
Suppresses the
warning messages
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 will
automatically switch to
SAMPLE mode
NOTE:
If a 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
SAMPLE SYSTEM RESET
TEST CAL MSG CLR SETUP
SAMPLE SYSTEM RESET
TEST CAL MSG CLR SETUP
SAMPLE SYSTEM RESET
TEST CAL MSG CLR SETUP
SYSTEM SYSTEM RESET
TEST CLR SETUP
MSG returns the active
warnings to the message
field.
STANDBY RANGE=500.0 PPB O3=XXXX
TEST CAL MSG SETUP
Table 3-8 lists brief descriptions of the warning m
essages that may occur during start up.
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