Page 64
Operator‘s Manual FERITSCOPE
®
FMP30
Normalization, Calibration and Master Calibration
6.3
Corrective Calibration
With a corrective calibration, a new zero point and one additional point
(one-point calibration with one calibration standard) or two additional
points (two-point calibration with two calibration standards) are established
for the calibration curve of the open Application and are stored in the open
Application. The coefficients of the master characteristic stored in the EE-
PROM of the probe plug are not affected.
Required materials
Suitable calibration standard set for the corrective calibration (in the
desired measurement range)
6.3.1 Selecting the Calibration Standards for the Corrective Calibration
Calibration standards are suitable for corrective calibrations only if their
normalized countrates Xn are between the following Xn ranges:
The normalized countrate Xn of the first calibration standard must be
between 0.02 and 0.9 (0.02
Xn calibration standard 1
0.9).
The normalized countrate of the second calibration standard (for a two-
point calibration) must be between 0.12 and 0.98 (0.12 < Xn calibra-
tion standard 2
0.98).
The difference of the normalized countrates of the two calibration stan-
dards that are used for the two-point calibration must be greater than
0.1 (Xn calibration standard 2 - Xn calibration standard 1 = DXn >
0,1).
Determination of the countrate Xn:
