Baker Hughes Panametrics XDP, Руководство пользователя

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5.3.8 Setting AutoCal verification
The auto verification function permits you to specify a
calibration drift limit that will trip a verification alarm
and alter the manner in which the drift data is handled
immediately following AutoCal. If this function is disabled,
the drift data is always updated and the verification alarm
will not be tripped. However, if Auto verification is enabled,
the following events may occur after an AutoCal:
• If the drift was lower than the preset auto verification limit,
the drift data is not updated and the verification alarm
is not tripped. This situation means that the AutoCal did
not detect any significant calibration drift, and the results
are ignored.
• If the drift exceeded the preset auto verification limit
but remained below both the max drift/cal and
• Max drift/total limits, the drift data is updated and the
auto verification alarm is tripped. This situation means
that the AutoCal detected a significant but acceptable
amount of calibration drift, and the verification alarm
informs you that the drift data has been updated.
• If the drift exceeds either the max drift/cal or the max
drift/total limits, the system fault alarm is tripped and
an error message is displayed on the LCD. This situation
means that the AutoCal detected an unacceptable
amount of calibration drift, and the fault alarm informs
you of the error condition.
To program the auto verification function, proceed
as follows:
1. Enable
AutoCal as described in “Enabling AutoCal” on
page 44 .
2. Use the [

] and [

] keys to highlight the auto verification
menu option and press [ENTER].
3. Use the [

] and [

] keys to highlight either the enable
option or the disable option and press [ENTER].
4. If you chose the disable option in step 3, no additional
programming is required. If you chose the enable option
in step 3, continue the programming with step 5.
5. Using the four arrow keys, enter the ppm/pcnt value for
the verif limit/cal. This is the amount of drift since the
previous AutoCal that will trigger the auto verification
process. Then, press [ENTER].
NOTE: When the auto verification alarm is tripped, a blinking
“CV” symbol is displayed on the LCD. You must follow the
instructions in “ Resetting the verification alarm” on page 50
to manually reset the alarm.
5.3.9 Viewing the drift data
The calibration drift data that has been accumulated during
the previous AutoCal runs is stored internally by the XDP. You
may view this data at any time by completing the following
steps:
1. At the
AutoCal menu, press [ENTER].
2. Use the [

] and [

] keys to highlight the view drift data
option and press [ENTER].
3. Read the following data from the screen that appears:
• Zero/cal: ±xx.xx (zero drift since last AutoCal)
• Zero/tot: ±xx.xx (total zero drift from this AutoCal)
• Span/cal: ±xx.xx (span drift since last AutoCal)
• Zero/tot: ±xx.xx (total span drift from this AutoCal)
4. When you have completed viewing the drift data,
press [ENTER].