Setting Auto-Calibration Parameters - Ametek ta7000R User Manual

Setting Auto-Calibration Parameters

The Calibration screen (Figure 3-6) is also used to set up automatic calibra-
tions. The ta7000R Monitor does not need Zero calibration. An external Calibra-
tion gas source must be connected to the AUX port on the ta7000R Rear Panel
of the ta7000R marked. Refer to the Gas Calibration specifications in Chapter 5.
Cal Time
Interval
Cal Purge
Cal Tol
PN T900-013, Rev A
This is the time of day of the automatic calibrations. This time is in 24-hour
format HH:MM, where HH is hour and MM is minute.
This is the time interval (in days) between automatic calibrations. This
parameter has preset intervals to choose from. Calibrations can be run at
intervals of 1 day, 7 days, 14 days, and 30 days. To change these settings, se-
lect Interval and the Toggle key will appear. Press the Toggle key to select
a preset value. Setting the interval to None will disable Auto-Calibrations.
This is the amount of time (in minutes) the ta7000R opens the purge
valve and allows Calibration gas to flow through and purge the line. The
Cal Purge parameter has preset values of 1 minute (factory default), 6
minutes, 13 minutes, and 21 minutes. The Purge time must allow enough
time to fully purge the supply line of the Calibration gas. For example, if
the Calibration Bottle is located far from the analyzer, a longer purge time
must be used. Failure to completely purge the supply line will result in
significant discrepancies between the real concentration and the reported
concentration.
This is the tolerance of the calibration run. If the calibration difference from
the previous calibration run is within the set tolerance range the instru-
ment will automatically update the calibration response factor.
If the calibration settings are not within the set tolerance range, the Status
LED will turn RED and the settings will not be updated. To manually up-
date these settings, move the cursor in front of the gas name and press the
Accept key. For information about how to permanently save the changes,
refer to "Saving Changes to Non-Volatile RAM" in this chapter.
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User Interface 3-9