Malvern Visco 88, User Manual, Page: 52 / 74

Chapter 6 Maintenance and troubleshooting
Page 6-4 MAN 0378
Fault finding
Work through this fault finding list if any problems occur. Look for a matching
symptom description and then check for possible causes.
Caution!
Do not try to disassemble or modify the instrument in any way not
described in this manual. It may damage the instrument or disturb its cali-
bration. This may cause a malfunction and the need for service. This may
invalidate the guarantees and warranty.
Lack of power
„
Check that the mains power is switched on and the AC adapter lead is plugged
into the back of the viscometer.
„
Check that the unit is switched on.
„
If operating without the mains power, check that the battery is fully charged.
„
Check that any fuses are functioning.
All measured values show zero
„
Ensure the mains power is connected.
„
The viscometer has a fault – contact Malvern Instruments.
Upper measurement system not rotating
„
Cables are not connected securely.
„
Faulty drive motor – contact Malvern Instruments.
„
Faulty electronics – contact Malvern Instruments.
Rotation but no recorded deflection
„
If LO is shown on the display the sample viscosity is too low for the measuring
system and shear rate. Use a geometry with a larger surface area.
„
Possible fault in electronics – contact Malvern Instruments.