A&D Weighing SV-100H - Manual (Page 85)

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14-2 When measurement values are not correct (For all models)
Is the viscometer in the data hold mode?
To release the data hold mode,
press the HOLD key.
The processing indicator blinks
while a measurement is performed.
Has the sample surface been adjusted to the center of the narrow part of the sensor plates?
Adjust the table height by turning the knob so that the center of the narrow part of the
sensor plates is on the sample surface.
Are the positions of the left and right sensor plates in the sample surface the same?
If not the same, level the viscometer using the leveling feet so that the liquid surface will
be leveled.
Are the sensor plates clean?
Remove any residual sample material from the sensor plates using alcohol.
When any residual sample material is on the portion of the sensor plates above the
sample surface, changes in the mass cause the vibration frequency to shift, which will
result in a measurement error.
Are the sensor plates bent?
If bent, contact the local A&D dealer for repair.
Does the sample generate bubbles because of the differences in the sample temperature and
the ambient temperature and do the bubbles stick to the sensor plates?
The sample viscosity depends on the temperature.
Generally, the viscosity of a liquid is temperature dependent and changes by negative 2
to negative 10 percent, per degree Celsius.
Is the sample surface lowered?
In a measurement that takes a long time, evaporation may cause the sample surface to
be lowered. Maintain the sample surface level.
Do the main unit and the display unit have the same serial number?
The main unit and the display unit have been adjusted in pairs. Confirm that the main
unit and the display unit have the same serial number.
Is calibration performed?
When the absolute viscosity value is important, it is recommend that a periodic
calibration be performed using a standard viscosity fluid.