One single measurement using PawKit took about 5 minutes, after
During the first three measurement series the criterion was used,
consecutive measurements should show the same result.
Normal total time
for the criterion to be fulfilled was 3-4
giving a total analysis
time of about 20 minutes.
Note that PawKit only showed two figures in the
In the fourth series, PawK4c, a stable value was defined as
This method gave no significant increase in accuracy.
After completion of the first measurement series, PawK1c,
was rested for about 2 days.
The next measurement series, PawK2c, gave about
0.02 aw higher
values. Calibration resulted in a decrease of read values
0.01 aw. After calibration the device appeared stable.
HygroPalm AW1 was used in Quick Mode using factory defaults
for when a measurement
The criterion was used, that two consecutive measurements
show the same result. One single measurement took about 5 minutes
and 5-7 measurements were required to fulfil the criterion.
A normal analysis
time was hence about 30 minutes.
Note that the result was given with three
After battery replacement it became obvious that the measurement
increased. The instrument was calibrated, resulting in a
read values with 0.015 aw.
During one measurement reading, the fan in the sample cell
was not running.
No significant alteration of the measured
result was, however, noted.
Running HygroPalm in continuous mode (AwE) gave no significant
in results. Each measurement was given about one hour.
Due to lack of information in the manual, Testo 650 was run in
mode only. The criterion was used, that two subsequent
readings should show
the same result. The time between readings
varied. Measurement time was
estimated to be about one hour.
The results show that the first measurement series, Testo1c, gave
results for values lower than aw = 0.97. The following two
significantly increasing values for the NaCl sample.
The results for values above aw = 0.97 could not increase more than
first measurement due to instrument cut-off at 0.999.
The battery was exchanged after the NaCl sample in series
Hence does battery voltage not explain the increase between this
series and series Testo1c.