PN T900-013, Rev A
Initiating a Manual Calibration
From the Main Menu, press the Calib key to start a Manual calibration run of
the ta7000R. The ta7000R does not need Zero calibration. An external Calibra-
tion gas source must be connected to the AUX port on the ta7000R Rear Panel.
Refer to the Specications chapter for Calibration gas specications.
In Calibration mode the instrument rst checks for Calibration gas pressure.
Next the instrument purges the Calibration gas line for the duration that has
been entered. Finally the ta7000R performs three calibration runs. The rst of
these three calibrations is discarded. The second and third runs are used to
generate the calibration response factor.
When the calibration cycle is nished the Status LED will turn RED, indicating
that there has been a change to system settings. To view these changes press
the Page key twice to view the Calibration screen. Move the cursor to the
rst gas. The percent change since the last calibration will appear in the right
corner below the time. If the percent change is acceptable, press the Accept
button. This will save the change in temporary memory. Repeat this process for
each gas species.
To nalize the calibration and make the changes permanent, the changes will
need to be saved into non-volatile RAM. See "Saving Changes into Non-Volatile
RAM" in this chapter for information about how to do this.
Any changes made and not saved into non-volatile RAM will be lost
if the instrument is turned O or power is interrupted. Any changes
accepted in non-volatile RAM are permanent and cannot be undone
(see "Saving Changes into Non-Volatile RAM" in this chapter for more
information).
Figure 3-7.
Calibration Run screen and
Calibration screen.
Run Mode 350 07:55:30
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Idle Page
Manual Cal
Running Cal Samples
H
3-10 | ta7000R Gas Purity Monitor
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