CO2 Analyzers 3100 & 3150
Instruction 19-9339
32
6.3 Alternative Reading Methods
There are three other reading types or methods which each require
slightly different operating procedures.
• Logged reading
• Peak reading
• Hold reading
6.3.1 Logged Reading
Logged readings need to be con
fi
gured and initiated via the
“UTILITIES” menu by pressing “KEY 6.” During con
fi
guration, the user
will be asked to supply an ID, reading interval, and pump run-time.
These parameters are used to control the reading frequency in
logging mode. Once logging mode is activated, the instrument will
automatically record a reading at every interval until stopped by the
operator or the memory becomes full. Logging is also suspended
temporarily while the user is accessing the menu options.
While the logging mode is active, both the “PUMP” and “STORE” key
will be deactivated. Only logged readings can be stored.
6.3.2 Peak Reading
The operator can toggle the reading mode between normal (current)
and peak readings. While in peak reading mode, the instrument will
only display peak values for each of the channels. These values can
then be stored by pressing the “STORE” key or automatically at the
appropriate logging interval (if logging is enabled).
The peak value is reset after a reading is stored or by exiting the peak
mode using the appropriate soft-key. The current mode of operation
can be identi
fi
ed by the status of the soft-key, either “NORMAL” or
“INVERSE”, where inverse indicates peak mode is active.
6.3.3 Hold Reading
The “HOLD READING” option allows the user to freeze the currently
displayed reading. This allows it to be manually recorded or moved
away from the sample point. Once activated, press the soft-key
“HOLD” and the readings are
fi
xed until the “HOLD” key is pressed
again or by storing the reading.
