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12. If necessary, press [ENTER] to send the results to a printer (see page 13 for details).
13. When you have finished taking the measurement, press [STOP].
14. After use, clean the instrument and spindle - see "Cleaning" on page 16.
8 TROUBLESHOOTING
8.1 Security stop
If an obstruction causes the up or down movement of the head to be impeded, or in the unlikely
event of a malfunction, an audible alarm sounds, the movement is stopped and the instrument
displays the following message:
SECURITY STOP
mechanical
malfunction
1. Press [STOP] to switch off the alarm.
2. If appropriate, switch off the instrument, remove the obstruction and then restart the test.
3. If the malfunction persists, contact Elcometer or your local supplier.
8.2 Unstable readings
Unstable viscosity readings may be caused by changes in the temperature of the sample or by the
behaviour of the product itself.
Check that the instrument is level. If the readings obtained remain unstable, the temperature of the
sample should be controlled and stabilised. If the readings remain unstable the instability is due to
the interaction between the product sample and the movement of the spindle.
In this instance, the product is called 'Non-Newtonian' and the behaviour of the product can be
described as thixotropic, rheoplexic, dilatant, pseudoplastic, etc. The same settings (SWT, SMT
and temperature) should always be used to test this type of product.
8.3 Instrument does not zero
When the spindle is rotating in free air (not immersed in a sample), the viscosity reading should be
zero. If it is not zero, please contact Elcometer or your local Elcometer supplier.
9 CALIBRATION
Your Viscometer was calibrated at the factory before shipment and a calibration certificate was
included in the box. Additional calibration checks at regular intervals over the life of the Viscometer
are a requirement of quality management procedures, e.g. ISO 9000, and other similar standards.
Calibration checks may be carried out by the user of the Viscometer (see instructions below),
however if the calibration of the Viscometer is found to need adjustment, please contact Elcometer
or your local Elcometer supplier.
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