Brodie BiRotor Plus B27X, Руководство по установке и эксплуатации

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IOM BiRotor Plus R19 Page 17/37
9 Maintenance
General
The Brodie BiRotor Plus will give many years of
consistent performance with little need for main-
tenance or service. There are, however, several
recommendations which, if followed, will further
extend the instrument’s service life.
The instrument should be kept fi lled with the pro-
cess fl uid it is measuring. This prevents the expo-
sure to any product vapor which, in the case of
petroleum products, are more corrosive than their
liquids. In addition, this also prevents the forma-
tion and build up of deposits or gums, which would
cause increased mechanical friction. The instru-
ment should always be kept free of water, keeping
it full of process fl uid will accomplish this, but if
this is not possible a regular inspection program
should be set up and any water drained from the
measuring unit.
Filter and strainer baskets should be cleaned fre-
quently. Debris and foreign matter are the biggest
cause of meter wear and damage.
All other associated equipment within the system
should be regularly maintained and checked for
functionality.
NOTE:
If the instrument is being used in hazardous
areas, all instructions on the labels and in this
manual must be followed before the start of any
maintenance.
If the instrument is removed from the process line,
the line should be sealed with suitable blanking
fl anges to prevent any possible leakage of product.
WARNING:
The internal measuring element contains closely
meshed moving parts, care should be taken not
to insert fi gures into the rotors or timing gears
as this will cause injury.
NOTE:
All Item Numbers referenced in this section can
be found on Figure 11-1 in Chapter 12, Parts Lists.
Performance Considerations
The amount of maintenance necessary for effi cient
instrument performance is dependant on many
factors; some of these are listed below.
Continuity of Operation: An instrument that oper-
ates continuously will require more attention than
one used intermittently.
Working Flow Rate: The life of the instrument is
proportional to the speed of its operation. If the
instrument is operating at or near the maximum
fl ow rate it will have a shorter life expectancy than
if it were operating at its minimum fl ow rate.
Lubricity: The lower the lubricration properties of
the process fl uid being measured then the lower
the life expectancy should be.
Cleanliness: A product contaminated with abrasive
particulate will accelerate the wear of the instru-
ment.
Electronics
This instrument can be provided with up to two
inductive pick off sensors and an optional pream-
plifi er. Maintenance of the electronics does not
require the system line pressure to be drained or
the instrument to be removed from the system.
ESD precautions must be followed.