ARB UTILITY MANAGEMENT SYSTEMSWATER | ELECTRIC | GAS
R450 Wall and Pit User’s Manual
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This manual is an unpublished work and contains the trade secrets and confidential information of Neptune Technology
Group Inc., which are not to be divulged to third parties and may not be reproduced or transmitted in whole or part, in
any form or by any means, electronic or mechanical for any purpose, without the express written permission of Nep
tune Technology Group Inc. All rights to designs or inventions disclosed herein, including the right to manufacture, are
reserved to Neptune Technology Group Inc.
The information contained in this document is subject to change without notice. Neptune reserves the right to change
the product specifications at any time without incurring any obligations.
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Trademarks used in this manual
R450 is a trademark of Neptune Technology Group Inc. Other brands or product names are the trademarks or registered
trademarks of their respective holders.
FCC Notice
This device complies with part 15 of the FCC Rules. Operation is subject to the condition that this device does not
cause harmful interference.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio communications. However, there
is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful inter
ference to radio or television reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
•Consult the dealer or an experienced radio/TV technician for help.
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RF Exposure Information
This equipment complies with the FCC RF radiation requirements for uncontrolled environments. To maintain compliance with these requirements, the antenna and any radiating elements should be installed to ensure that a minimum
separation distance of 20cm is maintained from the general population.
Changes or modifications not expressly approved by the party responsible for compliance could void
the user's authority to operate the equipment.
Professional Installation
In accordance with section 15.203 of the FCC rules and regulations, the MIU must be professionally installed by trained
utility meter installers.
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Industry Canada
This Class B digital apparatus meets all requirements of the Canadian Interference Causing Equipment Regulations.
Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this
device must accept any interference received, including interference that may cause undesired operation.
Cet appareillage numérique de la classe B répond à toutes les exigences de l'interférence canadienne causant des
règlements d'équipement. L'opération est sujette aux deux conditions suivantes: (1) ce dispositif peut ne pas causer
l'interférence nocive, et (2) ce dispositif doit accepter n'importe quelle interférence reçue, y compris l'interférence qui
peut causer l'opération peu désirée.
This section provides a general description of the R450 Meter Interface Unit (subsequently referred to as R450 MIU or MIU).
The R450 MIU by Neptune is a compact electronic device that collects meter reading data from an encoder register. It then transmits the data for collection.
The R450 MIU is easily installed and requires an Federal Communications
Commission (FCC) license to operate.
Figure 1 Wall MIUFigure 2 Pit MIU
Product Description
R450 MIU Programming
The MIU is NOT field programmable. At the factory, each of the following items are
programmed into the MIU:
Serial numbers – Each MIU is given two unique serial numbers/identification numbers (two IDs for compound units). Even numbers are given to the single registers
and odd numbers are given to a two-networked registers unit. Custom serial num
bers are not available.
RF Protocol Error Detection
The RF protocol is comprised of a header, data packet, and an error detection
mechanism that reduces the erroneous data.
Low Battery RF Emissions
The MIU stops RF transmissions when the battery discharges below the normal
operating voltage.
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R450 Wall and Pit MIU User’s Manual 1
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2 Specifications
This section provides you with the specifications for the R450 MIU.
Electrical Specifications
Encoder Register Interface
Supported Encoder Maximum Cable Length
Neptune ARB® V
2
300 feet (91 meters)
Neptune ProRead (ARB® VI)
500 feet (152 meters)
and E-Coder (ARB® VII)
Invensys ECR II®and ECR III
®3
Networked Neptune ProRead (ARB VI) /
200 feet (61 meters)
250 feet (76 meters)
E-Coder (ARB VII)
2
The length, which meets manufacturers’ published specification for wire length between encoder and remote receptacle,
is based on solid 3 conductor wire, 22 AWG.
3
Only specific formats of ECRIII programming are compatible. Contact Neptune for details.
R450 Wall and Pit MIU User’s Manual 2
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Specifications - R450 Pit MIU
Environmental Conditions
Operating Temperature-22° to 149°F (-30° to 65°C)
Storage Temperature-40° to 158°F (-40° to 70°C)
Operating Humidity0 to 95% Condensing
Functional Specifications
Register Reading8 digits
MIU ID9 digits
Dimensions and Weight
DimensionsRefer to Figure 3
Weight1.0 lbs. (454 grams)
Specifications
R450 Wall and Pit MIU User’s Manual 3
Figure 3 Pit MIU Dimensions
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Specifications
Specifications - R450 Wall MIU
Environmental Conditions
Operating Temperature-22° to 149°F (-30° to 65°C)
Storage Temperature-40° to 158°F (-40° to 70°C)
Operating Humidity0 to 95% Condensing
Functional Specifications
Register Reading8 digits
MIU ID9 digits
Dimensions and Weight
DimensionsRefer to Figure 4
Weight1.0 lbs. (454 grams)
4R450 Wall and Pit MIU User’s Manual
Figure 4 Wall MIU Dimensions
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3 General Installation Guidelines
This section describes tools, materials, and general installation information for the
R450 MIU.
Tools and Materials
Tables 1 and 2 show the recommended tools and materials you may need to successfully install the R450 MIU or to replace the MIU’s internal battery.
Some items may not apply to your specific installation or the list may not contain all required tools
or materials.
ItemDescription/ RecommendationUse
Table 1 Recommended Tools
Tool KitContains standard tools including:
•Assorted screwdrivers
•Needle-nose pliers
•Wire stripper
•Diagonal cutters
•Electrician’s knife
•Hammer
•Crimping Tool
Part #: 5500-158
Magnet6 lb. force
Part #: 12287-001
Table 2 Recommended Materials
ItemDescription/RecommendationUse
CableSolid 3 conductor,
#22 AWG (black/green/red)
Part#: 6431-352
Moisture
protection
compound
Novaguard sealant
Part #: 96018-072
Various installation procedures
performed by the utility
Activating the MIU
Connecting MIU to encoder
register
Covering exposed wires and terminal screws on register and MIU
and connecting Wall MIU or
replacement Pit MIU to encoder
register
Site Work OrderDocumentation provided by your
Safety and Preliminary Checks
Observe the following safety and preliminary checks before and during each installation:
• Verify that you are at the location specified on the Site Work Order.
• Verify that the site is safe for you and your equipment.
• Notify the customer of your presence and tell the customer that you will need
access to the water meter.
• If the Site Work Order does not have an MIU ID number on it, write in the ID
number(s) of the MIU you are about to install. If the Site Work Order already
has an MIU ID number on it, verify that it matches the ID numbers on the MIU
you are about to install.
Verifying/Preparing the Encoder Register
This R450 MIU is designed for use with the following encoder registers:
utility
•ARB III, IV, and V
Receiving and recording information about the work site
Before installing an MIU, the encoder register must be correctly wired and/or programmed to work with the MIU. ProRead (ARB VI) encoder registers do not
require programming.
When a ProRead (ARB VI) encoder register is used, the non-AutoDetect ProRead (ARB VI) register
must be programmed for three-wire mode.
6R450 Wall and Pit MIU User’s Manual
•ProRead (ARB VI)
•ProRead AutoDetect
•E-Coder (ARB VII)
•Invensys ECRII, ECR III *
*when programmed in ECR II 6-wheel format
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If connecting the MIU to a new ProRead (ARB VI) encoder register, or if a threeconductor cable is already connected to a ProRead (ARB VI) encoder register,
ensure that the ProRead (ARB VI) register is programed for three-wire mode using
the ProRead (ARB VI) programmer and its RF/MIU 6, 8, or 10ID TDI format. This
can be accomplished through the ProRead (ARB VI) receptacle before removing
the receptacle.
Installation of at Register (Non Pre-Wired or Potted Only )
1 Before wiring the pit encoder register, make sure the cable is long enough.
Then, when the installation is complete, the pit lid can be removed easily with
out straining the cable.
2 Use only 22 AWG cable to make the connection from the encoder register to
the MIU.
3 Remove the terminal screw cover from the encoder register.
4 Strip off 3/4” of jacket from the cable, leaving only the three insulated wires.
General Installation Guidelines
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5 Taking precautions not to nick or cut the insulation on the three wires, strip off
6 If required, connect the 3 conductor wire to the encoder register’s terminals
R450 Wall and Pit MIU User’s Manual 7
Black / RGreen / BRed / G
per the manufacturer’s instructions. See
Figure 5 and Table 3.
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General Installation Guidelines
7 Thread the cable around the strain relief posts of the encoder (Figure 6).
Figure 6 Cable Threaded Around Strain Relief Posts
8 Apply sealant liberally and ensure that it encapsulates the terminal screws and
exposed wires. (See
Figure 7).
Neptune requires Novaguard G661 sealant or Dow Corning compound 4.
8R450 Wall and Pit MIU User’s Manual
Figure 7 Application of the Sealant
Any leak point can cause a reading failure in a submerged meter setting.
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General Installation Guidelines
9 Snap the cover onto the encoder register (Figure 8).
Figure 8 Covering the Terminal Screws
10 Run the cable to the MIU, fastening it securely as necessary.
Do not exceed maximum cable lengths as defined in Table 4.
11 If encoder register is pre-wired and potted, use Scotchloks for connecting
register to MIU.
12 Proceed to the section specified for either Pit or Wall installation.
R450 Wall and Pit MIU User’s Manual 9
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4 Replacing the MIU Battery (Wall and Pit)
Follow these steps to change-out the pit R450 MIU’s internal battery:
Removing the Battery
1 Slowly remove the pit lid.
Because the MIU is connected to both the antenna
in the pit lid and the meter in the pit base, take care
not to strain the cable when removing the lid.
2Remove the transmitter cover by removing the two Phillips head
crews located inside the back cavity of the main housing.
(See Figure 9.)
3Lift the transmitter cover from the MIU.
screw
transmitter cover
Figure 9 Removing the MIU Transmitter Cover
Figure 10 The Battery Compartment
antenna
4Remove the battery casing from the main housing by inserting a flat-
head screwdriver and dislodging the battery from the battery com
partment. (See Figure 10.)
When removing the battery, it may be helpful to press on the connected
end while prying the other end.
nut
antenna cable
waterproof connector
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R450 Wall and Pit MIU User’s Manual 10
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Figure 11 Cutting the Battery Connection
Replacing the MIU Battery (Wall and Pit)
Cutting and Splicing the Battery Wires
1As close to the battery casing as possible, cut the battery
connection wires one at a time. See
2Insert battery wire left in MIU ensuring insulation has not
been compromised.
Cutting the battery connection wires one at a time
prevents shorting.
Ensure the R450 MIU’s black wire is connected to the
black wire on the new battery (-) and the red wire is
connected to the red wire on the new battery (+).
Figure 11.
Figure 12 Splicing the New Battery
Figure 13 Location of Toroid
3Use Scotchlok to splice the wires from the new battery
casing to the wires that were connected to the old battery
casing. See
4Be sure to carefully position wires and Scotchloks into
compartment in space available next to battery as shown
Figure 13, making sure the wires are not pinched when
in
the battery is snapped into the MIU housing.
Figure 12.
R450 Wall and Pit MIU User’s Manual 11
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Replacing the MIU Battery (Wall and Pit)
Figure 14 Returning Spliced Battery to Main Housing
5Snap the battery casing into the receiving clips on the main
housing. See
6Reactivate the MIU as shown.
Figure 14.
Replacing the Transmitter Cover
1Secure the transmitter cover using the two Phillips head
screws, until the cover is snug and fully seated.
Be careful not to pinch the battery wires between
the cover and the housing.
2Replace the pit lid.
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Replacement Parts
Replacing the MIU Battery (Wall and Pit)
Table 4 lists the available replacement parts for the R450 MIU.
Table 4 Available Replacement Parts
Part NamePart Number
Solid 3 conductor wire, 22 awg (1000 ft.)6431-352
Dow Corning #4 compound (5.3oz tube)96018-064
GE Novaguard (4cc Packet)96018-072
Scotchloks (UG)8138-125
Battery Assembly12213-100
Mounting Adapter12539-001
Fastener Screw8328-302
Magnet12287-001
Antenna12527-000
Flat Washer8340-054
R450 Wall and Pit MIU User’s Manual 13
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Replacing the MIU Battery (Wall and Pit)
Notes:
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Glossary
antenna (pit)The MIU antenna used for pit installations.
conical-shaped gasketThe cone-shaped rubber gasket on antenna cable used to seal cable
at top of connector housing.
connector housingThe black plastic 1/4-turn connector used to waterproof antenna
cable connection to pit MIU.
connector nutThe black plastic nut used to depress conical-shaped gasket and seal
antenna cable at the top of connector housing.
flat washerThe washer used to seal cable connector housing to pit MIU.
main housingThe main body of the MIU that attaches to the mounting adapter.
main housing fastener screwThe set screw (Hi-Lo fastener) that holds the main housing to the
mounting adapter.
maximum cable lengthThe length set by the manufacturer for the wire between the encoder
and the remote receptacle. The specifications for this length are
based on a solid 3 conductor wire.
MIUMeter Interface Unit.
mounting adapterThe back plate of the MIU that is attached to the wall.
register read timeThe default time is once an hour for ProRead and 15 minute interval
for E-Coder (ARB VII). Custom time is not available.
seal wireWire inserted into the seal holes, adjacent to the main housing fas-
tener screw. This seal must be broken to remove the main housing
from the mounting adapter.
serial numberA unique identification number given to each MIU at the factory. The
default value is the last programmed plus one. Custom serial numbers
are not available.
strain relief postsPosts located on the encoder register and the back of the main MIU
housing.
R450 Wall and Pit User’s ManualG-1
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Glossary
terminal screw coverThe plastic cover on the encoder register that protects the terminal
screws and exposed wires.
terminal screwsThe screws on the encoder register face that are used to connect and
anchor the three (3) conductor wire to the register.
transmission timeThe time between MIU transmissions. The default is approximately
fourteen (14) seconds. Custom time is not available.