Delmhorst F-2000R, Руководство по эксплуатации, Страница: 7 / 12

7
While it is important to note the average of several readings, it is even more important to
note the high readings and the frequency at which they occur.
REED TEMPERATURE
The F-2000R has been calibrated at 80°F on various samples and on different cuttings and
mixtures. The higher the temperature of the sample, the higher the meter readings will be.
Temperatures lower than 80°F cause lower meter readings. The correction is approximately
1% point for every 20°F/12°C difference. Refer to chart below:
Reed temperature Add to reading Subtract from reading
20°F / -7°C 3 --
40°F / 5°C 2 --
60°F / 15°C 1 --
80°F / 30°C 0 0
100°F / 40°C -- 1
120°F / 50°C -- 2
140°F / 60°C -- 3
Example:
Meter reading
: 22%
Temperature : 40°F / 5°C
Moisture Content : 24% (22 + 2)
CURING
Before proper curing has taken place, wide variations in moisture content should be
expected in both reed stems and in the stacks. These variations will be exposed by meter
readings taken on different parts of the bundle.
The higher the moisture range, the
wider are the variations. The more curing has been allowed to take place, the
greater uniformity in moisture distribution can be expected.
The validity of the meter readings is closely related to the care spent in sampling the reed
to be tested. A firm contact of the electrode with the reed is important. The number of tests
made should be increased whenever the initial readings show considerable variations.
DENSITY
The calibration of the moisture testers applies to stacks of normal “average” density.
Generally:
 High pressed stacks may yield readings 1-2% points higher.
 Loose pressed stacks tend to yield 1-2% point lower.
 Tests in stacked loose reed stems usually yield readings 2%-3% lower.
USE OF PRESERVATIVES
Reed preservative or stabilizers may also have an effect on meter readings. Normally a
reed bundle treated with preservative will read higher than a bundle of the same reed that
had not been treated. The readings typically increase by 2-4% points, and 24-48 hours
after treatment, the readings between the stacks tends to equalize.