Brodie BiRotor Plus B27X User manual

IOM BiRotor Plus R19Page 1/37
BiRotor Plus
Positive Displacement Flow Meter
B27X [3”] B30X [6”]
B28X [4”] B31X [8”]
B29X [6”] B32X [10”]
Installation & Operation Manual

IOM BiRotor Plus R19Page 2/37
Table of Contents
1 Read Me First 3
2 Essential Instructions 4
3 Warranty Claim Procedures 8
3.1 - Limited Warranty 8
3.2 - Limitation of Remedy and Liability 9
4 Receipt of Shipment 10
5 Return of Equipment 10
6 Storage 11
7 Description 11
8 Installation and Operation 12
8.1 - Installation Requirements 12
8.2 - Installing the Instrument 13
8.3 - Meter Start Up and Operation 14
8.4 - Higher Temperature Start Up 15
8.5 - Custody Transfer 15
9 Maintenance 17
9.1 - Removal/Replacement of Circuit Board 18
9.3 - Removal of the Measuring Unit from the Process Line 19
9.4 - Removal of the Measuring Unit from the Instrument Body 19
9.5 - Measuring Unit Disassembly While Maintaining Clearance Settings 20
9.6 - Complete Disassembly of the Measuring Unit 20
9.8 - Setting Clearances 23
10 Troubleshooting 24
11 Strainers 25
12PartsLists 26
Appendix A 34
Appendix B 36

IOM BiRotor Plus R19Page 3/37
1 Read Me First
Notice
Brodie International, a Brodie Meter Co., LLC Com-
pany (“Brodie”) shall not be liable for technical or
editorial errors in this manual or omissions from
this manual.
Brodie makes no warranties, expressed or implied,
including the implied warranties of merchantability
and fitness for a particular purpose with respect to
this manual and, in no event, shall Brodie be liable
for any special or consequential damages includ-
ing, but not limited to, loss of production, loss of
profits, etc.
Product names used herein are for manufacturer
or supplier identification only and may be trade-
marks/registered trademarks of these companies.
The contents of this publication are presented for
informational purposes only, and while every effort
has been made to ensure their accuracy, they are
not to be construed as warranties or guarantees,
expressed or implied, regarding the products or
services described herein or their use or applicabil-
ity. We reserve the right to modify or improve the
designs or specifications of such products at any
time.
Brodie does not assume responsibility for the
selection, use or maintenance of any product.
Responsibility for proper selection, use and main-
tenance of any Brodie product remains solely with
the purchaser and end-user.
No part of this work may be reproduced or copied
in any form or by any means - graphic, electronic
or mechanical - without first receiving the written
permission of Brodie International.

Page 4/37IOM BiRotor Plus R19
2 Essential Instructions
General
Brodie International designs, manufactures and
tests its products to meet many international
standards. As the instruments are sophisticated
technical products they must be installed, used
and maintained properly to ensure they continue
to operate within their normal specifications. The
following instructions must be adhered to and
incorporated into onsite safety programs where
possible.
Read all instructions prior to installing, operating,
and servicing the product. If this instruction manu-
al is not the correct manual, telephone [phone]
0200 and the requested manual will be provided.
Save this instruction manual for future reference.
If you do not understand any of the instructions,
contact your Brodie representative for clarifica-
tion.
Follow all warnings, cautions, and instructions
marked on and supplied with the product. Inform
and educate your personnel in the proper installa-
tion, operation, and maintenance of the product.
Install your equipment as specified in the instal-
lation instructions of the appropriate instruction
manual and per applicable local and national
codes. Connect all products to the proper electrical
and pressure sources.
To ensure proper performance, use qualified
personnel to install, operate, update, program, and
maintain the product. When replacement parts
are required, ensure that qualified personnel use
replacement parts specified by the manufacturer.
Unauthorized parts and procedures can affect the
product’s performance and place the safe oper-
ation of your process at risk. Look-alike substi-
tutions may result in fire, electrical hazards, or
improper operation.
Ensure that all equipment doors are closed and
protective covers are in place, except when main-
tenance is being performed by qualified personnel,
to prevent electrical shock and personal injury.
When installing this equipment, bolting must con-
form to the requirements of ASME B16.5 paragraph
5.3 and to the material requirements of ASME
B16.5 Table 1B. Gaskets must conform to the re-
quirements of ASME B16.20.
It is the customer’s responsibility to ensure that
piping or other attachments connected to the
valve do not place adverse stresses on the valve.
The design of the valve has not been assessed for
the effects of traffic, wind, or earthquake loading.
It is the customer’s responsibility to provide fire
prevention measures and equipment per local
regulations.
The valve has been designed without allowance
for corrosion. The customer should implement a
periodic inspection and maintenance program to
ensure that no part of the valve’s pressure retain-
ing components has been subjected to corrosion.
Use of this equipment for any purpose other than
its intended purpose may result in property dam-
age and/or serious personal injury or death.

IOM BiRotor Plus R19Page 5/37
Essential Instructions for Measuring Equipment, Including the
European Union (Directive 2014/32/EU MID)
Although measurement transducers are not spe-
cifically included in the MID regulations as they
do not form a complete measuring instrument
system, in accordance with Article 1 and 4, Annex
I and Annex VII, Brodie Meter Co., LLC implements
the same stringent regulations for all products and
tests to the same standards which are used for
complete measuring instrument systems.
The complete system must contain all the neces-
sary components to meet the requirements of the
local regulations. These components may include
pumps, air eliminators, strainers, valves, flow com-
puters, etc. The unit must be sealed in accordance
with the local regulations; it is the end user’s
responsibility to ensure this happens.
Flow measuring devices are provided with two
labels which specify flow ranges. The name plate
label, which includes the factory serial number,
details the operating flow range. This is the flow
range the device will operate within without caus-
ing damage. The custody transfer label details the
working flow range associated with a particular
weights and measures approval.
It should be noted that these may not be the same;
therefore, in trade applications, the flow ranges
specified on the custody transfer label should be
followed.
Essential Instructions for Electrical Equipment, Including the
European Union (Directive 2014/30/EU and 2014/32/EU)
This unit contains Electrostatic sensitive circuit
boards. Electrostatic safety precautions should be
taken to prevent damage.
When connecting wiring it is good practice to use
shielded cable. The shield should be connected to
earth at the read out or control systems end of the
cable; the other end of the shield should not be
connected.
This wiring practice is mandatory in order to
comply with the requirements for electromagnetic
compatibility as per the EMC directive 2014/30/EU
and MID 2014/32/EU of the council of the
European Union.
It is the end user’s responsibility to ensure that all
protective covers are in place to prevent electrical
shock and/or personnel injury.

Page 6/37IOM BiRotor Plus R19
Essential Instructions for Pressure Containing Equipment,
Including the European Union (Directive 2014/68/EU)
When installing the equipment the bolting must
conform to the requirements of ASME B16.5,
paragraph 5.3, and to the material requirements of
ASME B16.5, Table 1B. Gaskets must conform to the
requirements of ASME B16.20.
Although it is not expected for the device to be
used in a service where it would come in to contact
with unstable fluids, it is the end user’s responsi-
bility to assess any risks and take any precautions
necessary.
It is the end user’s responsibility to ensure that
piping and other attachments connected to the
Brodie instrument do not place adverse stresses
upon it, the design of the instrument has not been
assessed for the effects of traffic, wind or earth-
quake loadings.
It is the end user’s responsibility to ensure that the
instrument is mounted when required on suitable
supporting foundations.
It is the end user’s responsibility to install the
device in a well-designed system to avoid potential
hazards such as water hammer, vacuum collapse
or uncontrolled chemical reactions.
It is the end user’s responsibility to provide fire
protection measures and equipment in accordance
with the local regulations.
It is the end user’s responsibility to install suitable
straining and air/gas elimination systems.
The instrument has been designed without allow-
ance for corrosion or other chemical attack. The
end user should implement a periodic inspection
and maintenance program to ensure that none of
the instruments pressure containing components
have been subject to any corrosion. It is possible to
examine the instrument for evidence of corrosion
through the inlet and the outlet.
When the ambient temperature is below the
minimum operating temperature specified on the
device it is the end user’s responsibility to ensure
that the device is warmed to an appropriated tem-
perature before being pressurized.
Do not exceed the operating pressure and tem-
perature limits of the instrument as stamped on
the nameplates.
It is the customer’s responsibility to install this
equipment in a system that provides adequate
over-pressure protection and that limit pressure
surges to 10% of the maximum allowable working
pressure of the instrument.
It is the end user’s responsibility to provide fire
protection measures and equipment in accordance
with the local regulations.

IOM BiRotor Plus R19Page 7/37
Essential Instructions for Equipment to be Used in Hazardous
Locations, Including the European Union
(Directive 2014/34/EU)
Any Hazardous area approval applies to equipment
without cable glands. When mounting the flame-
proof enclosure in a hazardous area only cable
glands/conduit seals certified to meet or exceed
the rating of the equipment should be used, refer
to the type approval documentation for further de-
tails. Cable glands and cable must be suitable for
the operating temperature of the device under its
rated conditions, this is especially important if the
device has an operating temperature above 1580F
(700C). It is the end user’s responsibility to ensure
this happens.
The meter has been provided with an approved
sealing device in one of the cable entries, the other
entry has been closed with a plastic cap plug. It
is the end user’s responsibility to remove the cap
plug and replace it with a suitable cable gland
or conduit seal before the equipment is put into
service.
It is the end user’s responsibility to ensure, when
the instrument is located in a hazardous area, that
all cable glands and conduit seals are installed in
accordance with all local codes and regulations.
It is the end user’s responsibility to ensure that
before opening an electronic enclosure in a flam-
mable atmosphere that all the electrical circuits
have been interrupted.
If replacement of the screws which secure the
sensor housing, the UMB cover of the electronic
register and its cover, are required, they must be
replaced with either factory direct parts or M6-1x16
(6g) mm hex head socket screws of equal length.
The screws must be made from stainless steel
grade A1-70 or A2-70 and be torqued to a value of
55 inch lbs. upon installation. It is the end user’s
responsibility to ensure this happens.
It is the end user’s responsibility to assess the
maximum surface temperature of the device and
the equipment the device is attached to and locat-
ed next to as this may exceed the temperature rat-
ings of the device itself. If this happens, additional
safety precautions will need to be implemented by
the end user.
Flame proof housings contain Aluminum; although
the composition of these enclosures is careful-
ly maintained to prevent any risk of an ignition
source it is the end users responsibility to ensure
that the housing is not struck by rusty tools or
objects.
If the equipment is to be installed in an area where
dust deposits and build up are to be expected, a
maintenance plan should be arranged to include
regular removal of the dust build up. This will
prevent the dust from forming a possible source of
ignition.
The power supply requirements for this product
are specified within the operating and mainte-
nance manual, it is the end user’s responsibility to
operate the product within these specified limits.
The instrument may contain surfaces that con-
stitute flames paths, these surfaces should not
contain any mars or scratches. If any are present
the factory or the local representative should be
contacted immediately to obtain a new housing as
the safety of the enclosure may be impaired. It is
the end user’s responsibility to inspect these sur-
faces every time the enclosure is opened.
When flanged flame paths are reassembled the
gap between them should be less than 0.0015”
(0.038 mm) such that a 1/2” (12.5mm) wide
0.0015” (0.038 mm) feeler gauge will not enter
the gap more than 1/8” (3mm). It is the end user’s
responsibility to ensure this happens each time the
enclosure is reassembled.

Page 8/37IOM BiRotor Plus R19
3 Warranty Claim Procedures
3.1 - Limited Warranty
Brodie Meter Co., LLC (“Brodie”) warrants the
Goods-manufactured by Brodie will be free from
defects in materials or workmanship under normal
use and care until the expiration of the applicable
warranty period.
Goods are warranted for twelve (12) months from
the date of installation and 18 months from date
of shipment, whichever occurs first. Consumables
and Services are warranted for a period of 90 days
from the date of shipment or completion of the
Services.
Products purchased by Brodie from a third party
for resale to Buyer (“Resale Products”) shall carry
only the warranty extended by the original manu-
facturer.
Buyer agrees that Brodie has no liability for Resale
Products beyond making a reasonable commercial
effort to arrange for procurement and shipping of
the Resale Products.
If Buyer discovers any warranty defects and noti-
fies Brodie thereof in writing during the applicable
warranty period, Brodie shall, at its option, repair
or replace, that portion of the Goods found by Bro-
die to be defective or refund the purchase price of
the defective portion of the Goods/Services.
All replacements or repairs necessitated by in-
adequate maintenance, normal wear and usage,
unsuitable power sources, unsuitable environmen-
tal conditions, accident, misuse, improper instal-
lation, modification, repair, storage or handling,
or any other cause not the fault of Brodie, are not
covered by this limited warranty, and shall be at
Buyer’s expense.
Brodie shall not be obligated to pay any costs or
charges incurred by Buyer or any other party ex-
cept as may be agreed upon in writing in advance
by an authorized Brodie representative.
All costs of dismantling, reinstallation and freight
and the time and expenses of Brodie’s personnel
for site travel and diagnosis under this warranty
clause shall be borne by Buyer unless accepted in
writing by Brodie.
Brodie is not responsible for damages that in-
cur during shipment to Buyer for shipments that
are F.O.B. Brodie Factory, FCA Brodie Factory, or
EXWORKS Brodie Factory. Shipping charges for
goods returned to Brodie under warranty will be at
Buyer’s expense.
Products found not to be warranted can be re-
paired and returned at Buyer’s expense and return
charges born by Brodie will be added to the cost of
repair or returned to Buyer “as received” at Buy-
er’s expense. Insurance for returned products will
be at Buyer’s expense.
For all returned products please package to pre-
vent damage, or future damage during shipment.
Make sure the products are cleaned, free from
grease oil, chemicals and other materials that may
hamper defect detection and impede repair.
All returned items must be accompanied with a
MSDS for the products that have been in contact
with the equipment, including cleaning agents.

IOM BiRotor Plus R19Page 9/37
3.2 - Limitation of Remedy and Liability
Brodie International, a Brodie Meter Co., LLC Com-
pany (“Brodie”) shall not be liable for damages
caused by delay in performance.
The sole and exclusive remedy for breach of war-
ranty hereunder shall be limited to repair, correc-
tion, replacement or refund of purchase price un-
der the limited warranty clause in Section 1 herein.
In no event, regardless of the form of the claim or
cause of action (whether based in contract, in-
fringement, negligence, strict liability, other tort or
otherwise), shall “Brodie’s” liability to buyer and/or
its customers exceed the price to buyer of the spe-
cific goods manufactured or services provided by
Brodie giving rise to the claim or cause of action.
Buyer agrees that in no event shall Brodie’s liabili-
ty to buyer and/or its customers extend to include
incidental, consequential or punitive damages.
The term “consequential damages” shall include,
but not be limited to, loss of anticipated profits,
loss of use, loss of revenue and cost of capital.
Brodie International
P.O. Box 450 (30459-0450)
19267 Highway 301 North
Statesboro, GA 30461, USA
www.brodieintl.com
Phone: [phone]
3.1 - Limited Warranty Continued
A decontamination statement, RMA, and Customer
Problem Report must also accompany equipment
returned. Product received in an unsuitable con-
dition will be returned at Buyer’s expense without
being examined.
Goods repaired, and parts replaced during the
warranty period shall be in warranty for the
remainder of the original warranty period or
ninety (90) days, whichever is longer.
This limited warranty is the only warranty made
by Brodie and can be amended only in a writing
signed by an authorized representative of Brodie.
Except as otherwise expressly provided in the
Agreement, there are no representations or war-
ranties of any kind, expressed or implied, as to
merchantability, fitness for a particular purpose, or
any other matter with respect to any of the goods
or services.
It is understood that corrosion or erosion of ma-
terials is not covered by our guarantee unless the
Buyer has notified the Seller the product will be
used in an environment conducive to corrosion
and/or erosion and the product has been coated
with Brodie’s recommended method of protection
against corrosion / erosion.

Page 10/37IOM BiRotor Plus R19
4 Receipt of Shipment
When you receive your equipment inspect the
outside of the packing case for damage which may
have incurred during shipping. Damage incurred
during shipment is the responsibility of the car-
rier and is not part of the factory warranty. If the
packing case is damaged, notify the local carrier
immediately.
If the package is in good condition remove the en-
velope containing the packing list and carefully re-
move the equipment and all components included
in the shipment from the packing case. Inspect for
damaged or missing parts, referring to the packing
list, and prior to discarding the packing material.
If Items are missing from your shipment, contact
your sales representative. Your sales order number
will be required.
5 Return of Equipment
If the equipment must be returned to the factory
for repair or replacement, a Returned Materials
Authorization (RMA) must be included with the
components.
RMA forms may be obtained from your sales repre-
sentative or from the Product Service Department.
In addition to the RMA, a Material Safety Data
Sheet and a Decontamination Statement must be
included with Items being returned to the factory.
A Decontamination Statement is included in the
back of this manual.
If the equipment is removed from service it must
be thoroughly drained and neutralized before it is
packed for shipment. Care must be taken to en-
sure that product removed from the equipment is
disposed of in accordance with all applicable local,
state and federal regulations.
The flanges should be sealed to keep residual fluid
from leaking out of the meter during transport.
The type of flange seal required will vary with the
form of transportation used. Contact the carrier
for specific instructions.
The equipment should be securely mounted on a
wooden skid for shipment. The original container
or a solid wooden box should be used to protect
the exterior of the components.
When packing the components for return to the
factory, place the RMA and a copy of the packing
list that was delivered with the equipment inside
an envelope. Place the envelope inside the ship-
ping container with the Item being returned and
reference the RMA number on the outside of the
shipping container.
Equipment returned to the factory without the
proper documentation will be returned to sender
at their expense.
Ship the container to:
Brodie Meter Co., LLC
Product Service Department
19267 Highway 301 North
Statesboro, GA 30461, USA
Phone: [phone]
Fax: [phone]
[e-mail]

IOM BiRotor Plus R19Page 11/37
6 Storage
Brodie International instruments are precision de-
vices and should be handled and stored with care.
They should not be subjected to rough or improper
handling or stored in an environment where mois-
ture, extreme temperatures, or foreign material
can damage the meter.
The inlet and outlet flange covers should remain
on the instrument until the unit is ready for instal-
lation.
If extended storage is required it is recommended
that the instrument be placed in an environmental-
ly controlled warehouse. If this is not possible the
instrument should be stored in a waterproof lined
wooden box. Desiccant packs should be taped to
the inside of the instrument end connections be-
fore they are sealed to reduce the effect of humidi-
ty on the equipment and accessories. Caution must
be used to ensure desiccant packs are removed
prior to installation.
Depending on the storage time it may also be pref-
erable to use a compatible corrosion inhibitor.
If the valve is removed from service for an extend-
ed period of time it should be flushed with a light
oil before being placed into storage.
7 Description
General
The BiRotor Plus is an extremely accurate, dual-
cased, flow measuring device. It produces a high
resolution signal, via the use of non-wetted pick
offs, which is directly proportional to the rate of
liquid flow through the meter. These signals can be
shaped by a simple pre-amplifier for transmission
to ancillary equipment.
The BiRotor Plus meter utilizes the exclusive Bi-
Rotor principle. There are no sliding, oscillating, or
reciprocating parts.

Page 12/37IOM BiRotor Plus R19
8 Installation and Operation
General
The operation of the meter is embodied in the
function of the measuring rotors; they are always
dynamically balanced but hydraulically unbalanced
during operation. The rotors have no metal to met-
al contact with each other or the housing in which
they rotate. Clearances between moving compo-
nents are maintained with the use of timing gears.
The BiRotor Plus is a positive displacement (PD)
meter. A PD meter uses a mechanical principle that
measures flow by continuously dividing the flowing
stream into known volumetric segments, isolating
those segments momentarily, and then returning
them to the flowing stream while counting the
number of displacements. This is a direct volume
measurement, there is no inferred, or software
generated, measurement.
8.1 - Installation Requirements
1. The instrument should be mounted on a secure
foundation. Provisions should be made for ver-
tically mounting the meter to ensure stability.
2. The process piping should not place any undue
strain on the instrument.
3. Precautions should be taken to ensure that
thermal fluid explansion does not raise the line
pressure above the maximum working pressure
of the instrument.
4. Process piping must be clean and free of any
foreign matter.
5. A strainer should be installed upstream of the
instrument.
6. An air eliminator should be installed upstream
of the instrument if the process fluid is expect-
ed to contain entrained air.
7. A flow limiting valve should be installed down-
stream of the instrument, this will maintain a
back pressure on the instrument and prevent
excessive flow rates.
8. Isolation valves should be located at either
ends of the instrument run and a bypass sec-
tion installed. This will facilitate ease of compo-
nent removal, when required, and reduce loss
of product.

IOM BiRotor Plus R19Page 13/37
8.2 - Installing the Instrument
1. Remove the inlet and outlet protection covers.
2. Install the instrument into the pipe work us-
ing suitable hardware as specified in the local
codes and regulations. Ensure that the connec-
tions are made tight and torqued to the correct
values.
3. Connect the instrument wiring, refer to Figures
9-1 and 9-2. Cable entry into the electrical en-
closure is by two 3/4-14 NPT female threads.
4. Use wiring appropriate for the location and
operating conditions. Wiring glands and/or
conduits must conform to local electrical codes
and regulations if wiring is to be installed in a
hazardous area.
NOTE:
For additional requirements on installation please
refer to Chapter 2, Essential Instructions, at the
beginning of this manual.
If the instrument is being installed with additonal
accessories, the instructions for those accessories
should be read and understood before continu-
ing with the installation. The output signal from
the preamplifier, if one is fitted, can be altered to
interface with most electronic accessories. This is
accomplished by the use of jumpers on the circuit
board. Refer to Figure 8-1 for their configurations.
The UMB housing may be rotated in 90°
increments to accomodate the mounting of
accessories. If the UMB housing is removed for
any reason, care must be taken to disconnect the
sensor wires to prevent sensor damage. It is
essential that the four retaining screws used to
secure the UMB housing to the meter body be
torqued to 55 in/lbs.
Internal grounding terminal must be used for the
equipment grounding connection, and the external
terminal is for supplementary bonding connection.
Figure 8-1 Wiring Connections
TB1 Function
1 9-28 VDC Supply
2 V Comm
3 Channel A Signal
4 Channel A and B Common
5 Channel B Signal
Jumper Position
J1 (Channel A) B
1
J2 (Channel B) B1
5 VDC Pulse V Supply Pulse2
J3 (Channel A) A B
J4 (Channel B) A B
NOTE:
1 Do not Change without consulting factory.
2 V Supply Pulse = Input V minus approximately 2 volts
The instrument should not be located in a location
where excessive vibration is to be expected.
Care should be taken not to locate the instrument
near any source of electromagnetic interference,
such as those produced by electric motors, trans-
formers, solenoids, etc.
Either of these factors could induce a signal into
the flow sensing pickoff and interfere with the
accuracy of line product measurement.

Page 14/37IOM BiRotor Plus R19
Figure 8-2 Wiring Connections
Integral Brodie Electronic Rate Totalizer
(BERT-E)
If the instrument has been supplied with an inte-
gral electronic register, the internal wiring connec-
tions will already be in place. For additional func-
tions and wiring possibilities please refer to the
BERT-E’s instruction manual.
8.3 - Meter Start Up and Operation
Review the system installation to ensure all the
components are in proper sequence, all isolation
valves must be closed, all electrical connections
are complete, and all covers are in place.
1. To pressurize the system, slowly open the inlet
valve so as to prevent system shock. Slowly al-
low product to enter the system whilst keeping
the downstream isolation valve closed.
2. Open the downstream valve (10%) to allow any
air to be flushed from the system. Do not over-
speed the instrument.
3. Once the air has been flushed from the system,
close the downstream isolation valve and check
for any leaks. If leaks are found, check all seals
and retighten connections.
4. Fully open the upstream isolation valve to pres-
surize the system.
Flow start up can commence once the sytem has
been pressurized.
1. Turn on all electronic circuits and check for
proper function.
2. Open flow control valves and allow the in-
strument to run at 20% of its rated flow for 5
minutes.
3. During this initial run, check all other compo-
nents in the system for functionality.
4. Once this run is complete, set the flow control
valve to the required flow and ensure that the
maximum flow for the instrument is not ex-
ceeded.

IOM BiRotor Plus R19Page 15/37
8.4 - Higher Temperature Start Up
On higher temperature start up above 212°F
(100°C), based on an ambient temperature of 70°F
(21°C), special start up procedures are required to
prevent damage to the flow meter components. A
similar procedure should be followed on any ther-
mal shock in excess of 176°F (80°C). The following
equation may be used to determine the approxi-
mate flow meter warm up time.
th= [(Cnom )· (OT°f - 212)]/100
th= Warm Up Time in Hours
Cnom = Nominal Connection Size
OT°f = Operating Temperature in °F
During this warm up time the meter should be
operated at approximately 5% of maximum flow to
allow the temperature to stabilize.
8.5 - Custody Transfer
A meter factor will need to be established under
actual operating conditions if the instrument is to
be used in custody transfer applications. This inital
proving run should be carried out following the
completion of the meter start up procedure, and in
accordance with local regulations.
NOTE:
There are no user adjustable parts in these
instruments, however, the instrument housing is
provided with two cross-drilled bolts and drain
plugs to facilitate sealing if required by the local
weights and measurements regulations.
Typical Horizontal Installation with Associated Accessories
Model 200
F/A Converter
Electronic Register
Batch Controller
Pressure
Guage
Strainer
Pressure
Guage
Upstream
Digital Control Valve
Electronic Preset
BiRotor Plus
Figure 8-3 Horizontal Installation

Page 16/37IOM BiRotor Plus R19
Truck Loading - Vertical Installation for Marketing Terminal Applications
BiRotor Plus
Strainer
Digital
Control Valve
Electronic Preset
Figure 8-4 Vertical Installation

IOM BiRotor Plus R19Page 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 filled with the pro-
cess fluid 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 fluid 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
flanges to prevent any possible leakage of product.
WARNING:
The internal measuring element contains closely
meshed moving parts, care should be taken not
to insert figures 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 efficient
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
flow rate it will have a shorter life expectancy than
if it were operating at its minimum flow rate.
Lubricity: The lower the lubricration properties of
the process fluid 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-
plifier. 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.

Page 18/37IOM BiRotor Plus R19
9.1 - Removal/Replacement of Circuit Board
1. Disconnect all power to the instrument.
2. Remove the electronics lid , or electronics
register, if one is fitted, 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.
To reinstall, reverse the removal instructions and
torque the four Allen screws to 55 in/lbs.
Figure 9-1 Circuit Board and Housing
9.2 - Removal/Replacement of Pick Off Sensors
1. Remove the circuit board as detailed above.
2. Remove the center screw from the sensor hous-
ing and lift off the hold down washer.
3. Lift out the inductive sensor(s) and spring.
Resistance between sensor leads:
For Sensor with ident marker on Sheath = 1000
Ohms +/-15%
For Sensor with ident marker on sensor = 750 Ohms
+/-15%
Resistance between leads and housing when
installed: 10 M Ohms
If any of this is not the case the pick off should be
replaced. To reassemble, replace the pick off sensor
in the sensor housing. If only one pick off sensor is
present it should be inserted in the hole labelled ‘A’.
Secure with the hold down washer and Allen screws
and replace the circuit board (Item 38).
Figure 9-2 Pick Off Sensor Installation

IOM BiRotor Plus R19Page 19/37
9.3 - Removal of the Measuring Unit from the Process Line
1. Disconnect all power to the instrument.
2. Relieve all system pressure and drain the me-
ter.
3. Disconnect all external wiring from the elec-
tronics unit.
4. Unbolt the instrument from the process piping
and remove to a workshop for further disas-
sembly.
NOTE:
Care should be exercised to prevent the intru-
sion of foreign material into the instrument end
connections.
9.4 - Removal of the Measuring Unit from the Instrument Body
1. Turn the meter on end so that it stands on
its inlet flange, this will also facilitate in fully
draining the instrument of process fluid.
2. Remove screws and lift off the oulet housing.
3. Remove O-ring.
4. Holding the measuring unit assembly by the
ribs, carefully lift straight up until the assembly
clears the inlet housing.
5. Place the measuring unit in the horizontal
position.
At this stage the assembly can be inspected for
wear or damage. If the assembly had jammed it
may be possible to unblock the rotors by flushing
it with a cleaning solvent or kerosene without the
need for further disassembly.
Further disassembly of the measuring unit for
cleaning or inspection can be achieved while
maintaining clearance settings. This procedure is
covered in the next section. To fully disassemble
the measuring unit proceed to Section 9.6.

Page 20/37IOM BiRotor Plus R19
9.5 - Measuring Unit Disassembly While Maintaining Clearance Settings
1. Place a folded rag between the timing gears to
prevent the rotors from turning during disas-
sembly.
2. Remove the pulse wheel by removing the screw
, washer, and retaining washer.
3. Remove the screw from the end plate at the
timing gear end of the measuring unit assem-
bly.
NOTE:
A flat head screwdriver may be used in conjunc-
tion with the slots on the end plate to aid in its
removal. Excessive force is not required.
4. Use a plastic or rubber mallet and strike the ro-
tor shafts at the pulse wheel end of the hous-
ing to aid in the removal of the rotor assembly.
5. Once the rotor assembly has been removed
from the housing any blockage or foreign ma-
terial can be cleaned away.
At this stage the meter can be reassembled by
reversing the disassembly procedures without the
need to reset any clearances.
NOTE:
Any elastomers that have been removed should
be replaced with new parts during reassembly.
Figure 9-3 Measuring Unit Disassembly
9.6 - Complete Disassembly of the Measuring Unit
1. Place a folded rag between the timing gears to
prevent the rotors from turning during disas-
sembly.
2. Remove the pulse wheel by removing the
screw, washer, and retaining washer.
3. Remove the screws from the end plate at the
timing gear end of the measuring unit assem-
bly.
NOTE:
A flat head screwdriver may be used in conjunc-
tion with the slots on the end plate to aid in its
removal. Excessive force is not required.
4. Use a plastic or rubber mallet and strike the ro-
tor shafts at the pulse wheel end of the hous-
ing to aid in the removal of the rotor assembly.
5. Fold down the lock washer tabs to enable the
nuts to be undone and remove them from the
rotor shafts. The timing gears can be released
from the shaft by striking them with a plastic
or rubber mallet.
6. Remove the rotors from the end plate by gen-
tly tapping the rotor shafts with a plastic or
rubber mallet.
7. Remove the O-rings from the rotor shafts.