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IOM Single Case BiRotor Plus R06
Maintenance
10.1 General
The Brodie BiRotor Plus will give many years of
consistent performance with little need for
maintenance 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 process
fl uid it is measuring. This prevents the exposure to
any product vapor which, in the case of petroleum
products, are more corrosive than their liquids. In
addition, this also prevents the formation and build
up of deposits or gums, which would cause increased
mechanical friction. The instrument 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
frequently. 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 mainte-
nance.
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 operates
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 instrument.
Electronics
This instrument can be provided with up to two
inductive pick off sensors and an optional
preamplifi 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.
10.2 Removal/Replacement of Circuit Board
1. Disconnect all power to the instrument.
2. Remove the electronics lid , or electronics register,
if one is fi tted, by removing four Allen screws.
3. Disconnect terminals and wiring to the circuit
board.
4. Remove circuit board by removing the screws that
attach it to the housing.
