Page 16
Brief Guide FMP10 / FMP20
Mea
s
uri
n
g
7.4
Reference Measurements
z
Perform several reference measurements by measuring the thickness of a
calibration standard placed on the uncoated reference area in order to verify
a correct normalization or corrective calibration. The thickness of the stan-
dard should be close to the nominal thickness value of the coating to be mea-
sured.
z
If the obtained mean value is within the guaranteed error limits stated on the
foil, delete the readings of the reference measurement before starting with
the measurements on your specimens.
z
If the mean value is not within the guaranteed error limits, perform a correc-
tive calibration, or repeat the corrective calibration, respectively.
8
Measuring
To make a measurement, place the probe at a right angle on the specimen surface.
The probe can be lifted off after the measurement acquisition, i.e., after the read-
ing appears on the LCD display. The instrument is again ready to make measure-
ments.
Observe the following during the measurement:
z
Measurements should be made within the reference area.
z
To avoid erroneous readings, do not allow the probe to hover above the spec-
imen.
z
How high the probe should be lifted off depends on the measurement range
of the probe. To obtain a correct air value, the distance to the specimen
should be at least 3 to 4 times the max. measurable coating thickness.
z
To allow sufficient time for a measurement acquisition, the time between
individual measurements must be greater than 0.5 seconds.
The information stated in the operators's manual must be
observed when making measurements!
