The first time a part is measured, and any time the process changes, check zero on
both the bare steel substrate and on the uncoated zinc surface. Adjust if necessary
(see
Calibration Adjustment
).
Calibration Adjustment
Adjustment, or calibration adjustment is the act of aligning the Gage’s thickness
readings to match that of a known sample in order to improve the effectiveness of the
Gage on a specific surface or in a specific portion of its measurement range.
PosiTector
6000 FNDS
probes are factory calibrated and perform an automatic self-
check each time a measurement is taken. For many hot-dip galvanized applications,
no further adjustment is necessary from the factory calibration. The symbol
disappears whenever a calibration adjustment is made.
F Zero Adjustment
Measure the uncoated steel substrate (if available). If the average of several “N”
readings is not within tolerance of “0”, perform an
F Zero
adjustment.
1) Select
F Zero
from the
Cal Settings
menu.
2) Press
(+)
to select the number of readings to be used to obtain an average, typically
3 to 10 readings. The greater the variation between readings, the more zero readings
should be taken to obtain an average.
3) Repeatedly measure the uncoated steel part. The Gage will wait two seconds after
placing the probe on the surface to allow the user to correctly position the probe. After
the last measurement, the Gage will calculate a Zero which represents the average of
all the
F Zero
readings taken.
Zn Zero Adjustment
Measure the unpainted zinc surface (if available). If the average of several “N” readings
is not within tolerance of “0”, perform an
Zn Zero
adjustment.
1) Select
Zn Zero
from the
Cal Settings
menu.
2) Press
(+)
to select the number of readings to be used to obtain an average, typically
3 to 10 readings. The greater the variation between readings, the more readings should
be taken to obtain an average.
3) Repeatedly measure the unpainted galvanized part. The Gage will wait two seconds
after placing the probe on the surface to allow the user to correctly position the probe.
