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DMP30 / DMP40 Calibration
9.3 Calibration – when is it necessary?
New calibration – when is it necessary?
When there is a new specimen, the properties for which no calibration has yet
been created. In this case, you have to record the influencing variables with a
new calibration in order to compensate for them when measuring.
For measurements on magnetizable base material (FE), it makes sense to per-
form a calibration with at least 1 calibration standard.
If the specimen has a very low (e.g. titanium, stainless steel) or very high (e.g.
copper, silver) electrical conductivity when measured on non-magnetizable
base material (NF), we recommend performing a calibration with at least 1 cal-
ibration standard here as well.
Recalibration – when is it necessary?
The measurement does not achieve with the specified degree of precision.
The check of the current calibration delivers a negative result.
9.4 Recalibration
A recalibration is in effect the repeat of an existing calibration. The calibration data
are overwritten when a calibration routine is run again.
During the recalibration, you can skip individual calibration steps (Zero or Std. 1/2).
In the case of rough surfaces, it may be advisable to skip the Zero calibration
step during the recalibration. Repeat measurements on the rough base mate-
rial do not usually deliver better values. However, if the permeability of the
specimen base material has changed, you must perform the Zero step on the
base material with the changed permeability!
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