Functions
6.7 [2.08] Settings > Calibrations
Operating with the Local User Interface
124 Operating Manual, 06/2017, A5E31930478-05
Setting the calibration tolerances
Procedure
1. Main menu > "2. Settings" > "08. Calibrations" > "1. Setpoints, tolerances, purge
time" > "3. Calibration tolerances"
The settings of this menu cause the device to monitor the deviations of the zero point or
span point compared to the last calibration. The reaction to a tolerance violation is
different for validation tolerance and calibration tolerance.
Note
Tolerance violation
If the factory
-set tolerance value is exceeded, the device outputs a maintenance alarm.
ed values are no longer valid:
Evaluate the message text of the maintenance alarm. Remedy the causes of errors
mentioned in it, for example, incorrectly set setpoints.
If the cause of a tolerance violation cannot be traced back to incorrect operator inputs
contact the service department and take the device out of service.
2. Enter the calibration tolerance at the zero point: "Zero point" parameter box.
– Authorize access with Expert PIN, if necessary.
– Enter the calibration tolerance at the zero point as a percentage. The percentage
refers to the value of the smallest span.
3. Enter the calibration tolerance at the span point: "Span point" parameter box.
Enter the calibration tolerance at the span point as a percentage. The tolerance at the
span point refers to the span or the full-scale value of the selected measuring range.
Alarm, error, and system messages (Page 255)
Setting the sample gas purging time
Requirement
The sample gas purge time is the time that elapses from after a solenoid valve switches (end
of the calibration) until measurement of the sample gas resumes. If the solenoid valve
switches at the end of the calibration, the device is still in the "Calibration" operating state.
The device switches back to the "Measurement" operating state when the sample gas purge
time ends.
The sample gas purge time can be set to adapt to the local conditions, for example with
sample gas lines of different lengths and/or different purge speeds.
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