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Installation and Configuration Manual 21
Installation (Short Stem) Electrical ConnectionsInstallation (Long Stem)Introduction
Chapter 3
Installation (Long Stem)
For information on installing a short-stem version of the 7827 digital viscosity meter, see Chapter 2.
3.1 Introduction
There are a variety of external factors that affect the ability of the 7827 digital viscosity meter to
operate successfully. In order to ensure that your system works correctly, the effects of these factors
must be taken into consideration when designing your installation.
There are two main aspects to consider:
• The accuracy and repeatability of the measurements
• The relevance of the measurements to the overall purpose of the system
Factors which may adversely affect accuracy and repeatability include:
• The presence of gas or bubbles within the fluid being measured
• Non-uniformity of the fluid
• The presence of solids as contaminants
• Fouling of the meter
• Temperature gradients
• Cavitations and swirls
• Operating at temperatures below the wax point of crude oils
In some applications, absolute accuracy is less important than repeatability. For example, in a system
where the control parameters are initially adjusted for optimum performance, and thereafter only
checked periodically.
All drawings and dimensions given in this manual are given here for planning purposes only. Before
commencing fabrication, reference should always be made to the current issue of the appropriate
drawings. Contact Micro Motion for details.
To protect the tines from damage, a Transit Cover is fitted prior to shipment from the factory. The Transit
Cover is held in place by 2 grub screws. Be sure to remove and store the Transit Cover prior to
installation. Re-fit the Transit Cover if storing or transporting, such as for repair. If the Transit Cover has
been lost, it can be purchased from Micro Motion.
For further information on handling and using the meter, see “Safety guidelines” on page 1