PCE Instruments PCE-CT 100, Руководство пользователя

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6.5 Cal-Through-Coat calibration (calibration on a coated sample)
This calibration method is used if no uncoated sample is available for „zeroing“. The method can
only be applied with the probes F1.5 or FN1.5 (F mode).
This method must only be applied in cases in which the coating at the calibration point is smooth
and reproducible values can be measured. Do not use this method on structural coatings or
varnishes. The measurement errors may be too high.
Procedure:
1. Press Arrow Down key; “Calibration” appears on the display
2. Press OK key; “Zero setting” appears on the screen
3. Press Arrow Down key three times until “Cal-Through Coat calibration” appears on the
display
4. Press OK key; “Place probe on coating” appears on the display
5. Now place the probe repeatedly on the coated test object at a defined calibration point. A
mean value is displayed
6. Press OK key; “Place probe on foil standard” appears on the display
7. Select a calibration foil no thicker than the expected coating thickness and put it on the same
calibration point. Then place the probe repeatedly on the calibration foil covering the
calibration point
8. Press OK key; “Set standard value” appears on the display
9. Use the arrow keys to enter the calibration foil thickness as indicated on the standard
10. Press OK key; “Calibration has been set” appears on the display for a short time, followed
by the start screen with the four dashes – – – –
You can now measure using the Cal-Through-Coat calibration.
6.6 Deleting a calibration
This menu item shows you how to delete the active calibration. However, if you would like to make
a new calibration, a deletion is not necessary.
Procedure:
1. Press Arrow Down key; “Calibration” appears on the display
2. Press OK key; “Zero setting” appears on the screen
3. Press Arrow Up key once until “Deletion of calibration” appears on the display
4. Press OK key; “Works calibration activated” appears on the display for a short time, followed
by the start screen with the four dashes – – – –
You can now measure using the works calibration.
7 Statistics (2
nd
menu item)
After each measurement, the PCE-CT 100 saves the readings in a data memory and calculates a
variety of statistic parameters. The PCE-CT 100 has two types of memory, see chapter
9 Data
memory (4
th
menu item):
- the data memory in direct mode stores up to 2 x 1000 readings (1000 in F mode, 1000 in N
mode)
- the file based data memory stores up to 100,000 readings
In both modes, the statistical values are updated after each measurement and stored together with
the thickness values. The display shows the number of measurements N, the mean value x̅, the
standard deviation σ, the maximum value ↑ of the series and the minimum value ↓.