GE TMO2D, User Manual

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TMO2D Digital Display User’s Manual 49
Chapter 4. Basic Programming
4.8.5g Perform AutoCal?
The Perform AutoCal? option can activate the Auto Cal procedure without waiting for the specified Auto Cal interval.
To set Auto Cal to begin automatically, refer to page 42.
When the TMO2D performs an Auto Cal, either upon user command or at a prespecified time, it performs several
operations.
•
The Process/Cal relay will trip to the Cal position, and the Zero/Span relay will trip to the Span position. Refer to
the Relays Menu (page 31) to configure relays for calibration control.
For a 1 gas cal configuration:
•
The first line of the display reads either “AutoCal: Span Gas is ON” or “AutoCal: Offset Gas is ON” (depending on
the active mode) along with the equilibration time, which counts down to zero.
You can interrupt the Auto Cal at this point by pressing [NO]. The Display will prompt Abort AutoCal? You have two
choices.
•
Press [NO] to resume the countdown.
•
Press [YES] to return the display to the beginning of the Perform Auto Cal? option.
When the equilibration time reaches zero, the display will read Measuring . . . and count down the measurement time.
At the end of the Auto Cal procedure, the Process/Cal relay will reset to the Process position and the settling time will
count down to zero. The display will then read
AutoCal in Progress and the TMO2D will return to the start of the
Perform Auto Cal? option.
For a 2-gas-cal configuration:
•
The first line of the display reads “AutoCal: Span Gas is ON” along with the equilibration time, which counts down
to zero.
You can interrupt the Auto Cal at this point by pressing [NO]. The Display will prompt Abort AutoCal? You have two
choices.
•
Press [NO] to resume the countdown.
•
Press [YES] to return the display to the beginning of the Perform Auto Cal? option.
When the equilibration time reaches zero, the display will read “Measuring . . .” and count down the measurement
time. At the end of the measurement, the display changes to “AutoCal: Zero Gas is ON”, along with its equilibration
time, which also counts down to zero.
At the end of the Auto Cal procedure, the Process/Cal relay will reset to the Process position and the settling time will
count down to zero. The display will then read “AutoCal in Progress” and the TMO2D will return to the start of the
Perform Auto Cal? option.