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Installation and Configuration Manual 53
General MaintenanceCalibration Check
Chapter 6
General Maintenance
6.1 Overview
The 7829 Viscomaster
®
/ Viscomaster Dynamic
™
viscosity meter is rugged and robust, and has no
moving parts. When correctly installed and operated, servicing is not normally required, even with
poor quality fluid, and no periodic maintenance procedure is specified. It is recommended that a
visual inspection is carried out at intervals to check for leaks and physical damage, and corrective
maintenance carried out when required.
ADView’s Data Logging facility can be used whenever necessary to verify that the meter is
functioning correctly.
Check calibrations should be carried out at specified intervals in order to identify a malfunction or
deterioration in meter performance. If a fault or a drop in performance is detected, further tests are
required to identify the cause of the fault. Remedial action is limited to cleaning the meter tines,
making good any poor connections, and replacing the internal electronics. In the extreme cases the
complete meter may need to be replaced.
Note: The electronics within the meter contain calibration information relevant to that particular
meter only. The circuit boards operate as a pair, and therefore both boards must be changed together.
Contact Micro Motion for more details if you need to change the boards.
6.2 General maintenance
No periodic maintenance procedure is specified, but the following procedure is recommended for
periodic inspection. It can also be used when fault finding.
6.2.1 Physical checks
1. Examine the meter, its electronics housing and cables for any signs of damage and corrosion.
2. Make sure that the spigot connection is tight.
3. Check the meter for sign of leakage.
4. Check that there is no ingress of water/fluid into the electronics housing.
5. Ensure that the threads on the covers are well greased (graphite grease) and that the ‘O’ rings
are in good condition.
Note: The covers MUST be completely screwed down and, in the case of an explosion-proof enclosure
application, DO NOT FAIL to tighten the locking screws.
Care is essential in handling of the meter during its removal from and fitment to the pipeline/tank and
during transportation. Wherever possible, retain and use the original packaging.