Manual
9
8
Troubleshooting
Problem
Possible solution
The viscometer does not work
Check the batteries
The instrument does not show “zero” without any
fluids
Use the auto zero function
Viscosity speed is unstable and inaccurate
Check the rheological characteristics of the fluid
Perform a calibration check by using calibration
standards
Check if the rotor disk rotates steadily
Check if the temperature of the sample is stable
9
Further information
9.1
Calibration
The viscometer comes factory-calibrated and with a calibration certificate.
We recommend checking the accuracy of the viscometer on a regular basis by using optional calibration
oils.
For the verification, we recommend using the R3 rotor and a calibration standard of 1,000 mPa s. Perform
at least 5 measurements and compare the reading to the viscosity of the calibration oil.
Note: Keep in mind that the viscosity is greatly influenced by the temperature. Therefore, you should
perform the verification under the specified conditions of the calibration oil.
9.2
Reference substances and viscosities
Substance
Approx. viscosity (mPas)
Motor oil SAE 10
65
Olive oil
84
Coatings (airbrushed)
100
Yoghurt
150
Sugar solution 70 %
400
Lubricating oil
50
– 1,000
Concentrated juice
1,500
Inks
550
– 2,200
Honey
10,000
Nanocellulose (common additive)
8,000
– 10,000
Toothpaste
100,000
