8.2.7 Calibration: AUTOCAL/drift values
827
Thermo AUTOCAL: OFF
Drift values
Cycle time AUTOCAL
Purge time
It is possible to change the following parameters in this dialog:
• Thermo-AUTOCAL
– OFF: An automatic AUTOCAL only takes place when the
set cycle time has expired (see there).
– ON: An automatic AUTOCAL only takes place when the
cycle time has expired. In addition, an AUTOCAL is trig‐
gered if the operating temperature has changed by more
than 8 °C compared to the temperature measured during
the last AUTOCAL. This AUTOCAL it started with a delay of
280 minutes.
• Drift values
• Cycle time
• Purge time
These three parameters are described separate‐
ly.
8.2.7.1 Calibration: AUTOCAL/drift values: Drift values
This function is used to display the drift values of the zero point and sensitivity, and to change
them if necessary. The drift values are the total of the deviations in measured values for the zero
and sensitivity calibrations. This parameter is specic to the component.
The drift parameters of the UV measuring ranges dier from those of the IR measuring ranges.
Select component
: SO2 1
8271
This menu display appears following selection of the drift values
function and allows selection of the desired component.
You can switch between the individual components by pressing
an arrow key. You can select the displayed component using the
<ENTER> key.
82711
Drift SO2 515 vpm
Zero: 0
MR1: 0.0 MR2: 0.0
Reset drift values
You can now view the drift values and reset them if necessary. To
do this, position the cursor on the 4th line (reset) of the display
and press the <ENTER> key.
Functions
8.2 Calibration
ULTRAMAT 23
Equipment Manual, 04/2022, A5E37100388-012 125
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