Page 72
Operator‘s Manual FERITSCOPE
®
FMP30
Normalization, Calibration and Master Calibration
6.4.3
Master Calibration Procedure
The master calibration is retrieved from the service function menu
(
10.9 ‘Performing a Master Calibration’, beginning on Page 184).
The probe tip should be checked for potential wear prior to a master cali-
bration.
Too much probe tip wear becomes noticeable through an increased scat-
ter of the readings on a specimen with a homogeneous
-
ferrite content
distribution (e.g., a calibration standard).
In such a case, the probe must be sent to your authorized distributor or
directly to FISCHER for repair.
During the master calibration, the master characteristic can be determined
only if suitable calibration standards are used.
The calibration standards are suited for the master calibration only if their
normalized countrates Xn are within pre-established Xn ranges. The limits
of the Xn ranges can be queried during the master calibration without
affecting the calibration.
Key sequ. /
Action
Detail of the display Explanation
5 x
ENTER
2 x
Press
ENTER
5 times to retrieve the “Ser-
vice Function” menu and set the identifica-
tion umber 159 of the service functions
using the arrow keys
.
Retrieve the master calibration from the Ser-
vice functions menu and use
ENTER
to start
the procedure.
