74
P
IN
vs. N
O
-P
IN
modes — comments
P
IN
vs. N
O
-P
IN
modes — comments
The KT-9 permits the use of the N
O
-P
IN
mode (same as the
older KT-5 unit) or the newly developed P
IN
mode. Feedback
from users in the field indicates that many do not clearly
understand the benefits of using the P
IN
mode and revert
back to the N
O
-P
IN
mode under the false impression that it
gives better quality data. The following information shows
the very significant benefits of using the P
IN
mode.
Data Accuracy
On a flat rock
P
IN
Mode N
O
-P
IN
Mode
Some errors can occur due to
the possibility of variable
pressure of the pin against
the sample. This causes slight
compression of the rubber
cover, which slightly changes
the coil-to-sample spacing.
This in turn affects the result.
Another source of error
comes when the KT-9 is
slightly tilted with respect to
the surface being measured.
this places a portion of the
coil closer to the sample and
affects the reading.
There is no rubber to com-
press and it is easier to hold
the unit perpendicular to the
sample surface. Consequently,
any errors due to misalign-
ment and positioning are
minimal.
The absolute accuracy is esti-
mated to be ±3%.
The accuracy is estimated to
be ±1%.
74
P
IN
vs. N
O
-P
IN
modes — comments
P
IN
vs. N
O
-P
IN
modes — comments
The KT-9 permits the use of the N
O
-P
IN
mode (same as the
older KT-5 unit) or the newly developed P
IN
mode. Feedback
from users in the field indicates that many do not clearly
understand the benefits of using the P
IN
mode and revert
back to the N
O
-P
IN
mode under the false impression that it
gives better quality data. The following information shows
the very significant benefits of using the P
IN
mode.
Data Accuracy
On a flat rock
P
IN
Mode N
O
-P
IN
Mode
Some errors can occur due to
the possibility of variable
pressure of the pin against
the sample. This causes slight
compression of the rubber
cover, which slightly changes
the coil-to-sample spacing.
This in turn affects the result.
Another source of error
comes when the KT-9 is
slightly tilted with respect to
the surface being measured.
this places a portion of the
coil closer to the sample and
affects the reading.
There is no rubber to com-
press and it is easier to hold
the unit perpendicular to the
sample surface. Consequently,
any errors due to misalign-
ment and positioning are
minimal.
The absolute accuracy is esti-
mated to be ±3%.
The accuracy is estimated to
be ±1%.
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