TQC Sheen SH1349, Руководство по эксплуатации

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Calibrating the instrument
The instrument is supplied factory calibrated. It is only necessary to recalibrate the
instrument periodically in line with your in house calibration scheme.
Warning: Altering values in the calibration will affect the operation of the instrument. Do
NOT enter the calibration process unless the instrument is to be recalibrated, failure to
do so will result in the instrument displaying zero or incorrect readings.
The Digital Krebs Viscometer requires calibrating at three points. These points are at
approximately 12, 50 and 100% of full scale and have been chosen to give maximum
accuracy over the whole range of the instrument. The calibration of the instrument is
carried out in the grams range and therefore all calibration oil values in
centiPoise/mPas.S must be converted into grams by the following formula:
Where,
L=load (grams)
n=viscosity of calibration oil in centiPoise/mPas.S
p=density of calibration oil in g/ml
The three calibration points are:
1003 grams
495 grams
121 grams
Due to variations in the viscosity of calibration oils, it may be found that the calculated
value in grams differs from the calibration point value displayed on the instrument by a
few units.
The calculated values must agree with the calibration point values on the
instrument display before calibration commences.
If the calculated value differs from the displayed value, adjust the instrument value by
depressing either the centre left key (STORE) to decrease, or centre right key (UNITS)
to increase the displayed value. For guidance the following calibration is performed
using commercially available oils.
Actual values will vary slightly between batches.