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Infrared Gas Analyzer Operation
Teledyne Analytical Instruments 53
range you want to set using the UP or DOWN key. Then
press the ENT.
2.
The cursor next to the range of the selected channel is
highlighted. Select the range to be calibrated using the
UP or DOWN key. Then press the ENT key. The auto
calibration will be performed on the selected range.
Channels which have been set for autoranging (AR) will undergo
the auto calibration and manual calibration on the range selected here.
Once the calibration has started, the range will automatically switch and
on completion of the calibration, the original range is resumed.
The range identification contact is interlocked with the range after
the switch. However if the hold setting is set to “ON” the contact status
before calibration is maintained.
To ENABLE/DISABLE the auto calibration feature:
1.
With the cursor next to the range of the selected channel
you want to enable or disable for autocalibration (see
steps 1 and 2 above), use the SIDE key to highlight the
“enable” or “disable” option.
2.
Use the UP or DOWN keys to toggle between the two
options then select the desired status by pressing ENT.
To close the Auto Calibration Components/Range screen or cancel
this mode midway, press the ESC key. The previous screen will return.
Note: The order in which the Zero and Span calibrations are
performed in the auto calibration routine are different. For
the zero calibration, the calibration is performed according
to the order in which the channels were set to “enable”. For
Span, the calibration begins with the lowest channel
number first and proceeds sequentially to the highest
channel number set to “enable”.
3.5.3 Alarm Setting
The Model 7600 is equipped with 6 alarms (5 or 6 concentration
and a power failure alarm). The alarm configuration and settings can be
assigned to any channel and adjusted at any time by entering the user
mode and navigating to the Alarm Setting submenu. Arbitrary 6 alarm
contact outputs are used which can be configured as: