Aclara 09014 Installation Instructions

MTU Instructions

Page 1

ALL MTU Instructions as of 10/1/2009

Instructions Included

Document Page

471-2000 – General Installation & Wiring Guidelines........................................................3

471-2001 – for Rockwell/Equimeter/Sensus Gas Meters (Direct Mount)..........................15

471-2002 – for Most Popular Water Meters........................................................................ 19

471-2003 – for American Meter Company Gas Meters (Direct Mount).............................25

471-2004 – for American Meter Company Gas Meters (Indirect Mount)........................... 29

471-2005 – for Carson Industries Pit Lids..........................................................................33

471-2006 – for Armor Access Pit Lids................................................................................37

471-2007 – for Invensys/Icon MTU/Electric Meter.............................................................41

471-2008 – for Hexagram Submetering Pulse Adapters ..................................................43

471-2009 – for AMCO/ABB Water Meters...........................................................................51

471-2010 – for Neptune/Schlumberger Water Meters.......................................................55

471-2011 – for Sensus/Invensys Water Meters .................................................................59

471-2012 – for Hersey Water Meters...................................................................................61

471-2013 – for Badger Water Meters..................................................................................63

471-2014 – for M-Log Sensors ............................................................................................65

471-2015 – for Rockwell/Equimeter Intermediate/Large Capacity Gas Meters..............67

471-2016 – for American Commercial/Industrial Gas Meters ..........................................73

471-2017 – for Sprague/Schlumberger 250 Gas Meters (Bracket-direct-mount)..............79

471-2018 – for Lancaster 250 Gas Meters (Bracket-direct-mount).....................................83

471-2019 – for Lancaster 175 Gas Meters (Bracket-direct-mount).....................................87

471-2020 – for Mini-Max....................................................................................................... 91

471-2021 – for Sprague 175 Gas Meters (Indirect Mount)..................................................95

471-2022 – for Metron-Farnier Water Meters....................................................................101

471-2023 – for Nicor Composite Pit Lids .......................................................................... 103

471-2026 – for American Meter Commercial & Industrial Diaphragm Gas Meters

(Hexagram Large Meter Pulser)............................................................................................107

471-2027 – for Rockwell/Equimeter Intermediate and Large Capacity Gas Meters

(Hexagram Large Meter Pulser)............................................................................................109

471-2028 – for Actaris Commercial & Industrial Diaphragm Gas Meters

(Hexagram Large Meter Pulser)............................................................................................119

471-2029 – for Dresser Roots-type Gas Meters................................................................125

471-2030 – for Romet Roots-type Gas Meters.................................................................. 131

October, 2009

MTU Instructions

Page 2

ALL MTU Instructions as of 10/1/2009

Instructions Included (Continued)

Document Page

471-2031 – for Actaris/Schlumberger/Sprague ‘Slant-face’ Gas Meters........................137

471-2032 – for Armorcast Composite Pit Lids..................................................................141

471-2033 - for Actaris/Schlumberger/Sprague Pit/Curbside Gas Meters ......................145

471-2034 – for American Meter Company 5B-225 Gas Meters........................................149

471-2035 - for Sensus/Equimeter/Rockwell 415 Gas Meters...........................................153

471-2036 - for Sensus/Equimeter/Rockwell 175S Gas Meters........................................157

471-2037 - for Sensus/Equimeter/Rockwell 175-EMCO Gas Meters...............................161

471-2038 - for Sensus/Equimeter/Rockwell Residential Gas Meters (Indirect Mount)...163

471-2040 – for Landis & Gyr Focus Family Electric Meters............................................167

471-2041 – for Landis & Gyr S4 Family Electric Meters ..................................................169

471-2042 – for DFW Rectangular Composite Pit Lids......................................................171

471-2043 – for Carson Industries Polyplastic Pit Lids.....................................................175

471-2044 – for Sensus/Equimeter/Rockwell Gas Meters (Metric - direct mount)............179

471-2045 – for Mid-States 12" Round Pit Lids..................................................................183

471-2046 – for Alliance Rectangular Pit Lids....................................................................187

471-2047 - for Actaris/Schlumberger/Sprague ‘Flat-face’ Gas Meters...........................189

471-2051 – for Actaris Dattus fm2 and fm3 Commercial & Industrial

Diaphragm Gas Meters .......................................................................................................195

471-2052 – for Severn-Trent SmartMeter Water Meters...................................................197

471-2053 – for Endress & Hauser PROMAG Water Meters .............................................199

471-2054 – for Actaris Cyble Water Meters.......................................................................201

MTU Instructions

Page 14

General Installation and Wiring Guidelines

Intentionally Left Blank

The FCC wants you to know…..

This equipment has been tested and complies with Part 15 and Part 90 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference. 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 interference to radio or
television reception, try to correct the interference by one or more of the following measures:

• Reorient or relocate the equipment.

• Increase the separation distance between the affected equipment and receiver.

• Consult Hexagram, Inc. for help.

Any changes or modifications to this equipment not expressly approved by the Hexagram, Inc. could void the
authorization to operate the equipment.

FCC RF Exposure Guidelines

Hexagram’s low power RF devices and their antennas must be fixed-mounted on indoor or outdoor
permanent structure(s) providing a separation distance of at least 20 cm from all persons during norm al
operation. This device is not designed (and it has no external connection) to operate in conjunction with any
other antennas or transmitters. No other operating instructions for satisfying RF exposure compliance are
needed. This unit has no user or installer serviceable parts, and requires no field adjustment or calibration.
Units are sealed at the factory, and disruption of this seal could void the authorization to operate the
equipment.

Hexagram, Inc.

23905 Mercantile Road
Cleveland, OH 44122

MTU Instructions

Page 3

General Installation and Wiring Guidelines

Purpose & Scope

This instruction outlines general practices and procedures for the installation and wiring of
standalone, electronic interface Hexagram STAR MTUs. When installing an MTU,

always refer to these instructions in addition to
meter/MTU combination you will be installing and programming.

any specific instructions for the

Note: STAR MTUs are shipped to the customer in sealed enclosures and have passed

extensive testing and calibration procedures at the factory. No additional calibration or
adjustment is required, or can be made, without breaking thefactory seal. As calibrated,
these devices radiate a tiny fraction of the power allowable by
Exposure Limits 47 CFA CH 1.1310. There are no radio-frequency safety issues relating
to the use of this product based on this regulation.

471-2000 - 7/25/2007

FCC Radio Frequency

MTU Instructions

Page 4

General Installation and Wiring Guidelines
Recommended Supplies

We recommend the following supplies, for which quantities will depend upon the number of
MTUs to be installed and the conditions encountered at each installation location.

Item

Hexagram Part

Number

AMP Tel-Splice, 2-conductor 043-1910
Scotchlok, UR 2-3 wire gel-filled butt connector 043-1913
3-conductor, 22 ga, solid wire, black UV jacket 070-0506
3-conductor, 22 ga, solid wire, grey UV jacket 070-0508
AA alkaline battery, 1.5 volt (for Psion) 042-0036
Back-up battery for Psion MTU Programmer 042-0037
3M DBR-6 Direct Burial Kit (for pit unit splices) 043-1912
Sealant — White RTV 084-0082
Black electrical tape
Tie-wraps, black
Staples, telephone type, 9/16” (Arrow T-25)
Sharpie permanent marker, fine point
Plastic masonry anchors #6 x 1”, ¼” diameter

for use with Original Flatpak MTUs

Hexagram plastic spacers 056-5155H1
Phillips exterior screws 8 x 2 ½” (deck screw)
Phillips exterior screws 8 x 3” (deck screw)
Drywall screws, #6 x 1-5/8” Phillips, coarse (for indoor use)
Drywall screws, #6 x 2” Phillips, coarse (for indoor use)
MTU spacer for pipe or bar mount 056-5155K
18″ heavy-duty UV-resistant tie wrap (for bar mounting gas

067-0030

MTUs)
10-32 x 1½″ pan head machine screw (for bar mounting gas

069-103248CS

MTUs)
10-32 nut, stainless steel (for bar mounting gas MTUs) 069-3011
#10 7/16” flat washer, stainless steel (for bar mounting gas

069-3004

MTUs)

Quantity

As needed
As needed
As needed
As needed
As needed
As needed
As needed
As needed
As needed
As needed
As needed
As needed
As needed

As needed
As needed
As needed
As needed
As needed
As needed
As needed

As needed

As needed
As needed

for use with NEW Compact Flatpak MTUs

Long Spacers/Standoffs (for pit lid installations) 056-8150L
Short Spacers/Standoffs (for pit lid installations) 056-8150S
Phillips exterior screws 8 x 1 3/4” (deck screw)
Drywall screws, #6 x 1-5/8” Phillips, coarse (for indoor use)

As needed
As needed
As needed
As needed

MTU Instructions

Page 5

General Installation and Wiring Guidelines

Recommended Tools

• Cordless drill (⅜”, variable speed,
1800-2000 rpm, adjustable torque
settings)

• Drill bit, ¼”, carbide tipped

• Drill bit, ¼” x 12”, carbide tipped

• #2 Phillips power screwdriver bits

• Stapler for ¼” wire and cable

(Arrow T-25M)

• Diagonal side cutters/wire cutters

• Needle nose pliers – small

• Wire stripper

• Connector crimping tool 3M 9EY

• Safety goggles

• Screwdriver, #1 Phillips

• Screwdriver, #2 Phillips

• Screwdriver, 5/16” slotted

• Screwdriver, ¼” slotted

• Screwdriver, small slotted, ⅛”

blade

• Hammer

• Clipboard

• Flashlight with batteries

• Extension cord with trouble light

• MTU Programmer with cable,

programming coil and STAR
Programming Software

MTU Wiring

General - Many MTUs connect to the

meter by means of a 3-conductor, 22­gauge solid conductor wire. The wire is
housed in a PVC jacket with UV
inhibitors. A black-jacketed wire is
supplied on single-port MTUs and for port
1 of dual-port MTUs. A grey jacket is
used for the port two input to dual port
MTUs.

Wire Length – MTUs are provided with a
standard wire length of 12 feet. Additional
wire may be used if necessary. A
maximum run of up to 500 feet can be
used to position the MTU in a favorable
location. Use like-colors for cable jackets
and individual wires when extending MTU
wiring.

Some specific meters may impose other
wire length limitations. Consult the meter
manufacturer.

Wire Routing - Wires should be attached
to walls with 9/16” staples. If wire
clearance holes are needed to route wire
from the meter to the MTU, drill a ¼” hole
using an appropriate drill bit. The installer
is responsible for the selection of an
appropriate location for any hole to be
drilled.

Note: Wiring must be in accordance with
all national and local codes.

Wire Protection - A drip loop below the
MTU is not required.

Inspect wire to ensure that routing and
stapling have not caused wire damage.
Pull the wire lightly at each staple to
make sure that the staple is not set too
tightly.

Any splices made to wire must be
suitable for the environment and made in
accordance with national and local codes.

MTU Instructions

Page 6

General Installation and Wiring Guidelines

They must be secure and made in
accordance with the connection supplier’s
instructions. Generally, gel-filled
Insulation Displacement Connectors
(IDCs) such as 3M ScotchLok or AMP
Tel-Splice connectors should be used on
all wire-to-wire connections.

Splices located outdoors or in meter pits
should be further protected through the
use of a direct burial kit. This consists of
a gel-filled plastic tube that houses the
individual wire-to-wire splices to provide
additional protection from the elements.

Since MTU transmissions are similar in
nature to cellular phone signals, a cellular
phone can be used to help to determine if
a location is suitable for MTU mounting.
If the cellular phone signal drops
dramatically or indicates no signal at the
desired location, it is possible that the
MTU signal will also be blocked at this
location. In this case, the MTU will have
to be mounted in a different location,
possibly on the outside of the structure.

Keep the MTU away from all other
electrical wires.

Note: Do not mount the MTU under
wiring such as Romex, AC power wires,
cable TV wire, or telephone wire. Do not
allow these wires to lay on top of, or in
front of the MTU.

Note: Keep the MTU six inches away
from metal items such as pipes, conduit,
electric meters, electrical boxes, and
downspouts.

Make sure screws used to mount the
MTU do not protrude and pierce or
otherwise damage any wires, cables, or
pipes.

MTU Positioning and Mounting

General - MTUs must be positioned and

mounted properly to ensure optimum RF
signal propagation. Each MTU contains
an internal antenna near the top front
surface of the sealed enclosure. As a
result, the MTU should always be
mounted vertically and the STAR logo
should face the installer.

Use of Spacer – There are two primary
styles of MTUs. The Original Flatpak
STAR MTU requires the use of a spacer
(Hexagram Part Number 056-5155H1)
when the MTU is mounted on any surface
other than wood. The NEW Flatpak
STAR MTU is a modified design that can
be directly mounted to a variety of
surfaces without the use of a spacer.
See the examples below for additional
information.

MTU Instructions

Page 7

General Installation and Wiring Guidelines

NEW Flatpak STAR MTU – An example
of the NEW Flatpak STAR MTU is shown
below. These MTUs are approximately

6.5” x 4.25” x 1.5” thick, and can be

mounted on most surfaces without the
use of a spacer.

Original Flatpak STAR MTU – An
example of an Original Flatpak STAR
MTU is shown below. These MTUs are

6.5” x 5.5” X 1” thick, and require a
spacer if mounted on any material other
than wood.

Note: Do not use a spacer when
mounting an Original Flatpak STAR MTU
on wood.

MTU Instructions

Page 8

General Installation and Wiring Guidelines

Outdoor Mounting

MTUs mounted outdoors are typically
mounted to the side of buildings, to a
stationery post, to the piping surrounding
the meter, or to a pit lid.

Mounting to a Buiding or Post

If the unit is being mounted to the outside
of a building, the MTU will be connected
to wires that lead from the inside to the
outside of the building. If existing wire is
used, it must be of the same quality as
specified in MTU Wiring. It must also be
in good condition, without breaks,
damage, or corrosion.

Step 1 – Select a mounting location for

the MTU that will allow optimum signal
transmission.

Step 2 – Run wiring from the MTU to the

meter. If a splice is required, it may be
placed inside or outside. For special
circumstances, contact your supervisor.

If using existing wiring, remove any box
that houses the outside wires.

Step 3 – Mount the MTU on the side of

the building.

CAUTION!

Do not over tighten screws.
Excessive torque will crack
the MTU enclosure. Do not
tighten screws beyond the
point that the MTU touches
the mounting surface.

Step 4 – Make the appropriate
connections to the meter. Refer to the
specific MTU Instruction for the meter in
use.

Bar or Pipe Mounting

Particularly in outdoor gas applications, it
is sometimes convemient to mount the
MTU to the connecting piping. With the
Original Flatpak STAR MTU this is easily
done using a bar-mount spacer and two
18” long tie-wraps, (See Recommended
Supplies.)

Step 1 - Thread the tie-wraps into the bar
mount spacer as shown here.

• The MTU must be mounted
level, vertically with the STAR
logo facing the installer. Allow a
1” space between the top of the
MTU and the overhang of the
siding above it. This is critical

for proper radio signal
transmission.

• Use a Spacer (Hexagram Part
Number 056-5155H1) if
mounting an Original Flatpak
STAR MTU on a non-wood
surface.

MTU Instructions

Page 9

General Installation and Wiring Guidelines

Step 2 - Attach the spacer to the MTU

using #10-32 stainless steel screws, nuts
and washers. Tighten the screws to 12 to
15 in-lb. On a standard drill driver with 0
to 24 torque settings, this is typically the
#10 setting.

Step 3 - Wrap the tie wraps around the
bar as needed, pulling the ties around
(through the spacer plate) as they are
tightened.

Step 4 - Adjust the MTU as needed and
pull the tie wraps tight.

Pit-Lid Mounting

For water or gas meters located in meter
pits, MTUs can be mounted to the lower
surface of the pit lid if an approved, non­metallic pit lid is used. In these
applications, the MTU is mounted with it’s
front surface facing the bottom surface of
the lid, as shown below

Original Flatpak STAR MTU

When NEW Flatpak STAR MTUs are
mounted in this manner, spacers are
used between the MTU mounting tabs
and the lower surface of the pit lid, as
shown below.

Step 5 - Trim off the excess tie wrap,
leaving about a ½” tab.

Step 6 – Once Installation is complete,
program the MTU using the STAR
Programmer Software and your MTU
Programmer.

Revised Flatpak STAR MTU

MTU Instructions

Page 10

General Installation and Wiring Guidelines

A long spacer is available, for use when
the lower surface of the pit lid is a flat,
solid surface. A short spacer is used
when the lower surface of the pit lid in
use has a ribbed construction.

Contact Hexagram for information on
approved non-metallic pit-lids.

Indoor Mounting

For an inside mount, mount the MTU
vertically on a ceiling joist. It is important
to mount the MTU as high as possible.

Note: The MTU must be mounted above
grade.

Because the outside wall of a building
can have metal siding or foil insulation,
keep the MTU a few inches away from
the outside wall. Transmissions easily
pass through wood and masonry.

Do not install an MTU inside if the
basement has a metal ceiling or foil-lined
insulation in the ceiling or if it has foil on
the sidewalls running from grade to
ceiling. This will prevent the signal from
transmitting effectively.

Do not mount the MTU if large metal
objects, such as heating ducts, block both
the front and rear of the MTU. If
absolutely necessary, a single large metal
object may be located several feet away
from the MTU.

Unfinished Basement

Step 1 – Select a mounting location for

the MTU that will allow optimum signal
transmission. In unfinished basements,
this is typically high on a ceiling joist, at
least a few inches away from outside
walls.

Step 2 – Mount the MTU.

• The MTU must be mounted
level, vertically with the STAR
logo facing the installer. Allow a
1” space between the top of the
MTU and any overhang above
it. This is critical for proper
radio signal transmission.

• Use a Spacer (Hexagram Part
Number 056-5155H1) if
mounting an Original Flatpak
STAR MTU on a non-wood
surface.

CAUTION!

Do not over tighten screws.
Excessive torque will crack
the MTU enclosure. Do not
tighten screws beyond the
point that the MTU touches
the mounting surface.

Large metal objects such as heating
ducts, steel cabinets or metal ceiling
structures can block MTU transmissions.
Select locations that are at least five to
ten feet away from objects such as these.

MTU Instructions

Page 11

General Installation and Wiring Guidelines

Step 3 – Run wiring from the MTU to the

meter. Carefully staple the wire to the
wall every 18” and at every change in
direction using 9/16” staples. All turns
are to be at right angles. If wire must be
run on masonry, secure it with wire clips.
Run wires parallel to the joist. If a joist
must be crossed, run at a 90 degree
angle. If the MTU input cable must be
extended, use an appropriate splice.
Make sure inner conductors are not
nicked during stripping.

Step 4 – Make the appropriate
connections to the meter. Refer to the
specific MTU Instruction for the meter in
use.

Finished Basement

Step 1 – Select a mounting location for

the MTU that will allow optimum signal
transmission. In Finished basements,
this may be high on a ceiling joist in an
unfinished section of the basement or
high on an interior wall near a window or
outside wall, but at least a few inches
away from outside walls.

CAUTION!

Do not over tighten screws.
Excessive torque will crack
the MTU enclosure. Do not
tighten screws beyond the
point that the MTU touches
the mounting surface.

Step 3 - Run wiring from the MTU to the

meter. Run all wiring behind the wall if
possible. Carefully staple the wire to the
wall every 18” and at every change in
direction using 9/16” staples. All turns are
to be at right angles. If wire must be run
on masonry, secure it with wire clips. Run
wires parallel to the joist. If a joist must be
crossed, run at a 90 degree angle. If the
MTU input cable must be extended, use
an appropriate splice. Make sure inner
conductors are not nicked during
stripping.

Step 4 – Make the appropriate
connections to the meter. Refer to the
specific MTU Instruction for the meter in
use.

Note: Ceilings may contain metal.
Therefore, the MTU should be placed 2 to
3 inches down from a plaster or ‘dropped’
ceiling.

Step 2 – Mount the MTU.

• The MTU must be mounted
level, vertically with the STAR
logo facing the installer. Allow a
1” space between the top of the
MTU and any overhang above
it. This is critical for proper
radio signal transmission.

• Use a Spacer (Hexagram Part
Number 056-5155H1) if
mounting an Original Flatpak
STAR MTU on a non-wood
surface.

MTU Instructions

Page 12

General Installation and Wiring Guidelines
Do

9 Do check your cell phone for presence

of a strong signal before entering a
building or basement. Do install the
MTU if the signal remains strong at
the installation location. (Note: This is
a guideline only. It does not guarantee
that the MTU will be received by the
DCU. However, if cell phone service is
affected by the location, it is possible
that the MTU transmission will also be
blocked.)

9 Do select the best possible location

for MTU installation that will allow
optimum signal transmission.

9 Do select a location for MTU

installation that is above grade.

9 Make sure that the MTU is located

near an outside wall, but not on an
outside wall.

9 Make sure the MTU in installed within

500 feet of the meter.

9 Do make sure that no staples have

pierced the installation wire.

9 Do mount the MTU vertically and level

with the STAR Logo facing the
installer.

9 Do keep the MTU a few inches away

from the outside wall in case of metal
siding or foil insulation.

9 Do use a spacer when mounting an

Original Flatpak STAR MTU on any
surface other than plaster or wood.

9 Do use a spacer if you need to make

a splice near the MTU and if the MTU
is mounted outside.

9 Do keep the MTU at least 6” (the

width of the MTU) from all pipes,
conduit, electric meters, electrical
boxes, downspouts, dumpsters,
garbage cans, water, electric and gas
meters, etc.

9 Do keep at least 4” between MTUs

side to side and 3” top to bottom,
when installing multiple MTUs.

9 Do mount an MTU 2” to 3” below a

plaster ceiling or the metal grid of a
drop ceiling.

9 Do use amp splices and 3M DBR Gel

kits when making splices in pits.

9 Do make sure the correct meter type

and size is selected.

9 Do make sure the MTU is

programmed on.

9 Do program the MTU as the last step.

Make sure it is mounted, wired, all
splices are completed and tucked into
place and wires are stapled in place.

9 Do follow all national and local codes

when installing MTUs.

9 Do inspect all splices, connections

and wiring for damage.

9 Do route all wires away from the MTU

case.

MTU Instructions

Page 13

General Installation and Wiring Guidelines

Don’t

9 Don’t install the MTU if the cell phone

signal was strong outside the building
or basement and then goes into “no
service” or a very weak signal at the
MTU installation site.

9 Don’t select a location for MTU

installation that is easy to install, but
will not allow for good signal
transmission.

9 Don’t select a location for MTU

installation that is below grade.

9 Don’t place the MTU under Romex,

AC power wires, cable or TV wire,
telephone wire, etc. Don’t allow these
wires to lay on top of or in front of the
MTU.

9 Don’t mount the MTU right next to

conduit or metal pipes.

9 Don’t over tighten the screws when

mounting the MTU.

9 Don’t route the MTU wire along the

top or front of the MTU.

9 Don’t mount the MTU near 2 or more

metal objects such as heating ducts.

9 Don’t mount the MTU behind metal

objects such as washers, dryers,
furnaces, hot water tanks, metal sinks,
metal shelves, dumpsters, garbage
cans, water, electric or gas meters, or
any other large metal objects.

9 Don’t mount the MTU in a basement

that has metal ceilings unless there is
an opening in the ceiling that is above
grade where the MTU can be
installed.

9 Don’t mount the MTU near electrical

wires.

9 Don’t stack MTUs on top of each other

(back to front).

9 Don’t install an MTU if the case is

cracked or broken.

9 Don’t mount the MTU in the center of

a basement.

9 Don’t make a connection or splice if

any of the wires are nicked or cut. Re­strip the wire and start over.

9 Don’t damage insulation with staples,

or by rough handling.

9 Don’t stretch wire when installing.
9 Don’t exceed 500 feet total wire length

between the MTU and the meter.

MTU Instruction

Page 15

for Rockwell/Equimeter/Sensus Gas Meters

Purpose & Scope

This instruction provides a procedure for installing a STAR direct-mount MTU on the
following Rockwell/Equimeter/Sensus meters: R175, R200, R250, R275, R310, R315,

RT210.

Parts Required

Ref. # Item Part Number Quantity

1 Gasket (pre-applied to MTU) 066-5155C 1
2 Blue Coupler, MTU 056-5155E 2
3 Retaining Shaft, MTU 056-5155D 1
4 MTU, Direct Mount per project 1
5 Magnet 036-0002 1
6 Gear, Blue, Standard 056-5155G4 1
7 #6 Round Spacer, Nylon 068-60812-EX 2
8 10-24 x 1 1/8” Slotted, Fillister Head Machine Screw 069-102436H 4

9 #10 Flat Washer, Acetal 069-3019 1
10 #6 x 1 1/4” Combo Panhead Sheet Metal Screw 069-060040C3 2
11 Register Cover, MTU 109-7712A 1
12 #10 x 3/4” Tri-lobular Screw 069-101424A2 2
13 Gear, Red, Extended 056-5155G3 1
14 Gear, Yellow, Odometer 056-5155G2 1

471-2001 - 7/14/2008

for Rockwell/Equimeter/Sensus Gas Meters

Page 16

Tools Required

To mount the MTU to these meters, you
will need the following tools and
equipment:

• Cordless drill ⅜”, variable
speed, with adjustable torque
settings

• #2 Phillips bit

• Safety goggles

• Phillips screwdriver

• Slotted screwdriver

Installation Procedure

Before installing the MTU, anti-tamper,
safety, and security hardware must be
removed from the clear register cover.

Step 1 - Remove the existing clear
register cover by removing the four
screws. Discard the screws and cover.

Step 2 - Remove the register by
removing the two screws. Set the register
aside. Discard the screws.

Step 3 - Insert the four 10-24 x 1⅛”
screws through the holes on the MTU as
shown.

MTU Instruction

Step 4 – Turn the MTU over and insure

that there is a pre-applied gasket on the
back of the MTU as shown below.

Note: Couplers are pre-assembled to the
MTU. Insure that the couplers are firmly
attached to the shaft and that the coupler
on the front side of the MTU contains the
magnet. Also, verify that the plastic
washer is in place between the rear
coupler and the MTU.

Step 5 - Position the MTU on the meter.
Rotate the coupler so that the gear tooth
on the coupler engages with the gear
teeth on the gas meter. Orientation is not
critical, but you should be able to feel the
teeth “bite” when you turn the coupler
from the front of the MTU.

Step 6 - Tighten the four 10-24 x 1-⅛”
screws to 12 to 15 in-lb. On a standard
drill driver with 0 to 24 torque settings,
this is typically the #10 setting. Tighten
corner to corner.

Step 7 - Check the coupler. It should
have slight play — it should not bind or
turn too freely.

MTU Instruction

Page 17

for Rockwell/Equimeter/Sensus Gas Meters

Step 8 – Select gear to fit between the

register and the MTU without binding.
Typically, the correct gear can be
selected based upon the type of index in
use, as shown in the following table.

Type of

Index

Plastic, dial­type

Brass, dial­type

Plastic,
odometer­type

Place the selected gear into the coupling.
The head of the pin on the gear needs to
be facing out.

Coupler Drive Gear

Blue Gear

(Part # 056-5155G4)
Red Gear

(Part # 056-5155G3)
Yellow Gear

(Part # 056-5155G2)

Step 9 - On the register, insert the screws
and spacers.

Note: Spacers may not be required with
odometer-style registers.

Step 10 - Mount the register to the MTU,
fastening it to the mounting holes shown
below. Hand tighten to a torque not to
exceed 3-5 inch-pounds. Make sure the
index register gear and the MTU coupler
gear are engaged.

CAUTION!

Do not over tighten screws.
Excessive torque may
damage the MTU enclosure.

Power tools are not
recommended for use on
steps 9-12.

MTU Instruction

Page 18

for Rockwell/Equimeter/Sensus Gas Meters

Step 11 - After you feel engagement

between the index register gear and the
MTU coupler gear, tighten the register
screws until they are snug.

Step 12 - Place the new cover over the
register so that the top label or arrow is
on top and the vent holes are on the
bottom. Align the cover with the mounting
holes on the MTU, press it into place, and
insert the #10 x 1” screws. Hand tighten

to a torque not to exceed 3-5 inch­pounds. The gasket should be

compressed slightly.

Step 13 - Replace any anti-tamper,
safety, or security hardware onto the p­lastic cover as required.

Step 14 – Once Installation is complete,
program the MTU using the STAR
Programmer Software and your MTU
Programmer.

MTU Instruction

Page 19

for Most Popular Water Meters

Purpose & Scope

This instruction provides wiring information for connecting STAR MTUs to any of the
following popular water meters:

• AMCO and/or ABB water meters (all sizes)
equipped with Invision, Scancoder, RS Pulser,
or Type A Industrial Pulser registers and with
the AMCO/ABB V100 (PSMT) meter and the
S130/5UM hot and cold water meters.

• Neptune and/or Schlumberger water meters (all
sizes) equipped with ARB-V, Auto/ProRead or
E-Coder PLUS registers.

• Sensus and/or Invensys water meters (all sizes)
equipped with ECR or ICE registers.

• Hersey water meters equipped with Translator
or ER2 registers.

• Badger water meters (all sizes) equipped with Read-O-Matic, RTR or ADE
registers.

• Metron water meters (all sizes) equipped with OER registers.

Supplies and Tools Required

See Publication 471-2000, General
Installation and Wiring Guidelines for a

complete list of recommended tools and
supplies for MTU Installation.

Installation Procedure

Step 1 - Select a mounting location for

the MTU that will allow optimum signal
transmission, and install any needed
wiring. Be sure to follow all General
Installation and Wiring Guidelines as
outlined in Publication 471-2000.

Step 2 – Select the wiring diagram that

applies to the meter you are connecting
and make the appropriate wiring
connections.

a. Direct Wiring to Meter - MTU

wiring is supplied stripped to a
standard length that fits water
meters with screw terminals.
Simply wrap the wires around the
screw terminal and tighten the
screw hand tight. Over tightening
the screw can stress and possibly
damage the wire.

b. Water Meter with Integral Cable -

If the water meter is supplied with
an integral cable and a cable-to­cable splice is necessary, use a
gel-filled wire splice designed for
outdoor (moisture applications) to
seal the individual connections.

471-2002 - 7/24/2006

MTU Instruction

Page 20

for Most Popular Water Meters

Note: When connecting a dual port MTU
to a compound meter, connect port 1
(black jacket) to the primary, or high-flow
register and port 2 (grey jacket) to the
secondary or low-flow register.

Step 3 – Make a final visual check of the
wiring from the MTU to the meter register.
Verify that the cable routing is neat,
secure and professional.

Step 4 – Once installation and wiring are
complete, program the MTU using the
STAR Programmer Software and your
MTU Programmer.

AMCO/ABB Scancoder

MTU Cable Scancoder Register

Red G (Green)
Black B (Black)
White R (Red)

Wiring Diagrams

AMCO Invision

MTU Cable Invision Register

Red G (Green)

Black B (Black)

White R (Red)

AMCO/ABB RS Pulser

MTU Cable RS Pulser Register

Red R (Red)
Black B (Black)
White B (Black)

No Connection G (Green)

MTU Instruction

Page 21

for Most Popular Water Meters

AMCO/ABB Type A Industrial Pulser

MTU Cable

Red

Black

White

Type A Industrial

Pulser Register

+ Positive

- Negative

- Negative

AMCO/ABB V100 (PSMT)

MTU Cable V100 (PSMT) Cable

Red Red
Black Blue
White Blue

No Connection Black
No Connection Yellow

AMCO Digital Register

MTU Cable

Red R (Red)
Black B (Black)
White B (Black)

No Connection G (Green)

AMCO Digital

Register

AMCO S130/5UM Hot Water

MTU Cable S130/5UM Cable

Red Brown
Black White
White White

MTU Instruction

Page 22

for Most Popular Water Meters

AMCO S130/5UM Cold Water

MTU Cable S130/5UM Cable

Red Brown
Black White
White White

Neptune/Schlumberger ARB-V or
Auto/ProRead

Neptune/Schlumberger E-Coder PLUS

MTU Cable

Red B (Black)
Black G (Green)
White R (Red)

E-Coder PLUS

Register

Sensus/Invensys ECR or ICE

MTU Cable ProRead Register

Red B (Black)
Black G (Green)
White R (Red)

Note: Auto/ProRead registers must be
programmed for 3-wire mode.

MTU Cable

Red R (Red)
Black B (Black)
White G (Green)

Sensus/Invensys

Register

Note: The 8-digit Sensus ICE Register
must be programmed to deliver 6
consecutive digits of reading information
for proper operation with STAR MTUs.

MTU Instruction

Page 23

for Most Popular Water Meters

Hersey Translator

MTU Cable Hersey Register

Red R (Red)
Black B (Black)
White G (Green)

Note: The Hersey Translator Register
must be programmed for 6-digit readings
for proper operation with STAR MTUs.

Hersey ER2

Badger RTR

MTU Cable RTR Cable

Red R (Red)
Black B (Black)
White G (Green)

Note: Some RTR registers may be
provided with only a black wire and a
white wire with a shield. For this
variation, Trim the shield off and connect
as listed below.

MTU Cable RTR Cable

Black B (Black)

MTU Cable ER2 Ca ble

Red R (Red)
Black B (Black)
White G (Green)

White B (Black)

Red W (White)

No Connection White-Shield

MTU Instruction

Page 24

for Most Popular Water Meters

Badger ADE

MTU Cable ADE Cable

Red R (Red)
Black B (Black)
White G (Green)

Note: The Badger ADE register must be
programmed for 6-digit readings for
proper operation with a STAR MTU.

Badger Read-O-Matic

Metron OER Register

MTU Cable OER Cable

Red R (Red)
Black B (Black)
White G (Green)

Note: The 5-digit Metron OER register
must be configured for an additional
trailing zero for proper operation with
STAR MTUs.

MTU Cable

Red

Black

White

Read-O-Matic

Terminals

+ Positive

- Negative

- Negative

MTU Instruction

Page 25

for American Meter Company Gas Meters

Purpose & Scope

This instruction provides a procedure for installing a STAR direct-mount MTU on the
following American Meter Company meters: AC-175, AL-175, AT-175, AC-250, AL-250,

AM-250, AR-250, AT-210/250, AT-350, AL-425, AC-630.

Parts Required

Ref. # Item Part Number Quantity

1 Gasket 066-5155E 1
2 Coupler, MTU 056-5155E1 2
3 Retaining Shaft, MTU 056-5155D 1
4 MTU, Direct Mount per project 1
5 Magnet 036-0002 1
6 #8 x 3/8” Combo Panhead Sheet Metal Screw 069-080012C4A 2
8 ¼-20 x 1 1/4” Slotted Fillister Head Machine Screw 069-142040GA 2
9 Register Cover 109-7712A 1

10 #10 x 1” Combo Panhead Sheet Metal Screw 069-100032C3A 2

471-2003 - 7/18/2007

MTU Instruction

Page 26

for American Meter Company Gas Meters
Tools Required

To mount the MTU to these meters, you
will need the following tools and
equipment:

• Safety glasses

• Phillips screwdriver

• Slotted screwdriver

Installation Procedure

Before installing the MTU, all anti-tamper,
safety, and security hardware must be
removed from the clear register cover.

Step 1 - Remove the existing clear
register cover by removing the four
screws that hold it. Discard both the
screws and the cover.

Step 2 - Remove the register by
removing the two screws that hold it. Set
the register aside. Discard the screws.

Step 3 - Mount the register onto the MTU,
fastening the register to the mounting
holes shown here with the #8 x 3/8”
screws provided.

Then insert the second screw and tighten
both screws to a torque not to exceed 3-5
inch-pounds.

Note: On some odometer-style registers
like the one shown below, slight
protrusions on the back of the register
assembly can interfere with proper
alignment of the register. Should this
occur, use a diagonal cutting plier to trim
the two wire guides on the MTU to the
right of the coupler. Trim these guides as
close to flush with the MTU enclosure as
possible. (See MTU photo below.)

Start one of the two screws into the
mounting hole, and then slide the register
beneath the screw aligning the wiggler on
the register with the MTU coupler.

CAUTION!

Do not over tighten screws.
Excessive torque may
damage the MTU enclosure.

Use of Power tools is not
recommended.

for American Meter Company Gas Meters

Page 27

Step 4 – Check that the register is
properly engaged by rotating the coupler
on the back of the MTU and observing
the register dials.

MTU Instruction

Step 5 – Next, Insert the two ¼-20 x 1

1/4” machine screws through the holes on
the MTU as shown here.

Step 6– Turn the MTU over and place the
gasket on the back of the MTU so that it
aligns over the two screws.

Half-foot Drive Quarter-foot Drive

Step 8 – Now, firmly hand tighten the two

screws to 12 to 15 in-lb. Be careful not to
over tighten the screws. Excessive torque
may damage the MTU enclosure.
Because of this, power tools are not
recommended for this procedure.

Step 7 – Next, position the MTU on the
meter. Tighten the two ¼-20 x 1 1/4”
mounting screws most of the way, and
then rotate the register dials slightly to
engage the wiggler on the gas meter. The
wiggler must engage with the rear coupler
on the MTU as shown in these
illustrations. (Coupler shown detached
from the MTU for illustration purposes
only.)

Step 9 - Check the coupling one more
time. It should have slight play — it
should not bind or turn too freely.

Step 10 - Place the new cover over the
register so that the top label or arrow is
on top and the vent holes are on the
bottom. Align the cover with the mounting
holes on the MTU, press it into place, and
insert the #10 x 1” screws. Hand tighten
to a torque not to exceed 3-5 inch­pounds. The gasket should be
compressed slightly.

MTU Instruction

Page 28

for American Meter Company Gas Meters

Step 11 – Replace any anti-tamper,

safety, or security hardware onto the
plastic cover as required.

Step 12 – Once Installation is complete,
program the MTU using the STAR
Programmer Software and your MTU
Programmer.

MTU Instruction

Page 29

for American Meter Company Gas Meters

Purpose & Scope

This instruction provides a procedure for installing a STAR indirect-mount MTU on the
following American Meter Company meters: 5B-225, 225. Please also refer to
Publication 471-2000, General Installation and Wiring Guidelines for general information
covering the wiring and mounting of STAR MTUs.

Parts Required

Ref. # Item Part Number Quantity

1 Gasket Part of Item 4 1
2 Drive Foot Part of Item 4 1
3 Magnet Spyder Part of Item 4 1
4 American Meter 225 Sensor 109-7393B 1
5 Magnet 036-0002 1
6 #8 x 3/8” Combo Panhead Sheet Metal Screw 069-080012C4A 2
9 ¼-20 x 2” Slotted Fillister Head Machine Screw 069-142064HA 4

Not Shown
Not Shown
Not Shown
Not Shown
Not Shown
Not Shown

471-2004 - 7/18/2007

MTU, Indirect Mount per project 1
MTU spacer for pipe or bar mount 056-5155K 1
18″ heavy-duty UV-resistant tie wrap
10-32 x 1½″ pan head machine screw
10-32 nut, stainless steel 069-3011 2
#10 7/16” flat washer, stainless steel 069-3004 2

067-0030 2
069-103248

CS 2

for American Meter Company Gas Meters

Page 30

Tools Required

To mount the MTU to these meters, you
will need the following tools and
equipment:

• Cordless drill ⅜”, variable
speed, adjustable torque
settings

• #2 Phillips power screwdriver
bit

• Safety goggles

• Phillips screwdriver

• Slotted screwdriver

• 7/16″ nutdriver or boxwrench

• Diagonal side cutter

Installation Procedure

MTU Instruction

Step 4 - If the meter has a stamped metal

right angle drive foot, orient the drive foot
of the index to the position of the magnet
coupler of the sensor as shown. The
index foot should be over the open or flat
area of the coupler. It should not engage
the elongated slot/hole in the magnet
coupler. When properly installed, the
magnet coupler will simply push on the
outside of the index foot to rotate it.

Installing the Sensor Assembly

Before installing the Sensor Assembly,
anti-tamper, safety, and security
hardware must be removed from the clear
register cover.

Step 1 - Remove the existing clear
register cover by removing the four
screws. Set the clear register cover aside.
Discard the screws.

Step 2 - Remove the register by
removing the two screws. Set the register
aside. Discard the screws.

Step 3 - If the meter has a stamped metal
right angle drive foot (not a round plastic
pin), verify that the nylon spacer washers
are in place, as shown here.

Page 2

MTU Instruction

Page 31

for American Meter Company Gas Meters

Step 5 - If the meter has a round plastic

pin, align the register to the American 225
Meter Adapter. The pin on the register
must be in the hole in the coupler, as
shown. Make sure the index foot rotates
freely.

Step 6 - Place the wire into the channel
to the right.

CAUTION!

Do not over tighten screws.
Excessive torque may
damage the MTU enclosure.

Power tools are not
recommended for use on
step 7.

Step 9 - Mount register with adapter and

the original plastic cover to the meter.
Step 10 - Attach the register and adapter

assembly to the meter with the four ¼-20
x 2 fillister head screws. Tighten the
screws to 12 to 15 in-lb. On a standard
drill driver with 0 to 24 torque settings,
this is typically the #10 setting.

Step 11 - Replace any anti-tamper,
safety, or security hardware onto the
cover as required.

Step 12 - Mount the MTU, following the
wiring and mounting guidelines outlined in

Publication 471-2000, General
Installation and Wiring Guidelines. If

necessary, the MTU cable can be
extended up to 500 feet.

Note: If desired, you can mount the MTU
on the supply line using the bar-mounting
procedure below.

Step 13 – Once installation is complete,
program the MTU using the STAR
Programmer Software and your MTU
Programmer.

Step 7 - Fasten the register to the
adapter with the two #8 x 3/8” screws
provided. Hand tighten to a torque not

to exceed 3-5 inch-pounds.
Step 8 - Rotate the adapter arm 180

degrees from the position of the meter
indexer. An example is shown.

Bar-Mounting the MTU

Step 1 - Thread the tie-wraps into the
MTU spacer as shown here.

MTU Instruction

Page 32

for American Meter Company Gas Meters

Step 2 - Attach the spacer to the MTU

using the provided screws and washers.
Tighten the screws to 12 to 15 in-lb. On a
standard drill driver with 0 to 24 torque
settings, this is typically the #10 setting.

Step 3 - Wrap the tie wraps around the
bar as needed, pulling the ties around
(through the spacer plate) as they are
tightened.

Step 4 - Adjust the MTU as needed and
pull the tie wraps tight.

Step 5 - Trim off the excess tie wrap,
leaving about a ½” tab.

Step 6 – Once Installation is complete,
program the MTU using the STAR
Programmer Software and your MTU
Programmer.

MTU Instruction

Page 33

for Carson Industries 1419-3 and 1419-5 Pit Lids

Purpose & Scope

This instruction provides a procedure for mounting a STAR Flatpak MTU to a Carson
Industries Model 1419-3 or 1419-5 pit lid. This procedure does not detail the wiring of

the MTU to the meter that may be encountered inside of the pit. Please refer to
Publication 471-2000, General Installation and Wiring Guidelines in addition to any meter
specific MTU installation and programming instructions.

Parts Required

Item Part Number Quantity

MTU As required for

installed meter
¼” x 3 ½” Phillips flat-head stainless steel machine screw Source locall y 2
¼’ Stainless Keps nut Source locally 2
¼” Stainless flat washer Source locally 2

Tools Required

To mount the MTU to these Carson pit
lids, you will need the following tools and
equipment:

• Drilling fixture for Model 1419

lids.

• Safety goggles

• #3 Phillips driver bit

• 7/16” Nut driver

Note on setting the torque range: On a
drill-driver that has about 20 settings
(positions), set the adjustment to #6. Use
the lower speed range of the drill-driver.
This should amount to approximately 8 in­lbs of torque. Reference the operating
instructions for your particular drill to
more accurately determine what setting to
use to achieve a torque range of
approximately 8 in-lbs.

1

• 17/64” standard drill bit

• MTU Programmer

• Cordless Drill 3/8”, variable speed,

with adjustable torque settings.

471-2005 - 2/28/2006

MTU Instruction

Page 34

for Carson Industries 1419-3 and 1419-5 Pit Lids
Installation Procedure

Step 1 - Mount the drilling fixture onto

either model of the Carson Pit Lid. The
fixture is keyed so that it will align in only
one direction.

Step 2 - Hold the fixture secure in
position on the lid and drill two holes into
the lid using the supplied 17/64” drill bit,
through the guide holes in the fixture.

Step 5 - Insert 2 stainless screws through
the holes drilled in the top side of the lid.

Step 6 - Turn the lid over and attach the
FlatPak as shown below. Note the
FlatPak orientation. The front side (with
the STAR logo) must be placed against
the bottom of the lid. Apply a ¼” stainless
steel flat washer to each screw, then
apply the ¼-20 stainless steel keps nut to
each screw.

Step 3 - Remove the fixture from the lid.
Step 4 - Countersink the 2 holes using

the supplied ¾” 82 degree countersink,
only deep enough for the screw heads to
be flush or slightly below the surface of
the lid.

Step 7 - Tighten the hardware with the
torque driver. Use the nutdriver or
combination wrench to hold the nut if
necessary. Tighten hardware just past
snug.

CAUTION!

Use no more than 12-15 in-lbs
of torque. Do not over tighten
hardware.

MTU Instruction

Page 35

for Carson Industries 1419-3 and 1419-5 Pit Lids

Step 8 - Turn the lid over and verify that

the heads of the screws are flush or
below the lid surface.

CAUTION!

Be sure to follow all General
Guidelines outlined in
Publication 471-2000 along
with the specific wiring
instructions for the meter
being used.

Step 9 – Wire the MTU to the meter,
folding and forming wires into valve box
as necessary so that they do not interfere
with lid locking mechanism and cannot
become pinched.

Step 10 - Installation is now complete.
You can now proceed to program the
MTU using the STAR Programmer
Software and your MTU Programmer.

MTU Instruction

Page 36

for Carson Industries 1419-3 and 1419-5 Pit Lids

Intentionally Left Blank

MTU Instruction

Page 37

for Armor Access Rubber Pit Lids

Purpose & Scope

This instruction provides a procedure for mounting a STAR Flatpak MTU to an Armor
Access brand rubber composite pit lid. This procedure covers the mounting of an

Original Flatpak STAR MTU or the New Flatpak STAR MTU to these pit lids. This
procedure does not detail the wiring of the MTU to the meter that may be encountered
inside of the pit. Please refer to Publication 471-2000, General Installation and Wiring

Guidelines in addition to any meter specific MTU installation and programming instructions.

Parts Required

Item Part Number Quantity

MTU As required for installed

meter

Long Spacers (for pit lid mounting of New Style Flatpak
MTUs)

#10 x 2 1/2” Phillips Pan Head Type AB Stainless Steel
Sheet Metal Screw

#10 x 2” Phillips Truss Head Type AB Stainless Steel
Sheet Metal Screw

Tools Required

To mount the MTU to these Armor
Access pit lids, you will need the following
tools and equipment:

• Safety goggles

• #3 Phillips driver bit

• Cordless Drill 3/8”, variable speed,

with adjustable torque settings.

Note on setting the torque range: On a
drill-driver that has about 20 settings
(positions), set the adjustment to #6. Use
the lower speed range of the drill-driver.
This should amount to approximately 8 in­lbs of torque. Reference the operating
instructions for your particular drill to
more accurately determine what setting to
use to achieve a torque range of
approximately 8 in-lbs.

056-8150L

1

2 per New
Style MTU

installation

2 per New
Style MTU
installation

2 per Original

Style MTU
installation

471-2006 - 11/6/2006

MTU Instruction

Page 38

for Armor Access Rubber Pit Lids
Installation Procedure

Mounting an Original Flatpak STAR
MTU to an Armor Access pit lid.

Step 1 – If there is a recess on the

bottom surface of the pit lid, place the
MTU into the recess. If no recess, center
the MTU as shown onto the inside
surface of the lid.

Pit Lid with No Recess

through the recessed mounting holes as
shown. Torque screws to approximately 8
in-lbs. MTU should be snug and flush to
the surface of the pit lid.

Pit Lid with No Recess

Pit Lid with Recess

Pit Lid with Recess

Step 2 - Attach the MTU to the pit lid with

the 2” stainless sheet metal screws

Step 3 – Wire the MTU to the meter,
making sure that the wire is routed so that
it does not become pinched when the lid
is closed.

Step 4 - Installation is now complete. You
can now proceed to program the MTU
using the STAR Programmer Software
and your MTU Programmer.

CAUTION!

Be sure to follow all General
Guidelines outlined in
Publication 471-2000 along
with the specific wiring
instructions for the meter
being used.

Page 39

Mounting a New Flatpak STAR MTU to
an Armor Access pit lid.

Step 1 – Center the MTU as shown onto

the bottom surface of the pit lid. Place
plastic spacers under the mounting lugs
on the MTU as shown below. Be sure to
use the long spacers (Hexagram Part
Number 056-8150L).

MTU Instruction

for Armor Access Rubber Pit Lids

Step 3 – Wire the MTU to the meter,

making sure that the wire is routed so that
it does not become pinched when the lid
is closed.

Step 4 - Installation is now complete. You
can now proceed to program the MTU
using the STAR Programmer Software
and your MTU Programmer.

Step 2 - Attach the MTU to the pit lid with
the 2 ½” stainless sheet metal screws
through the 2 mounting holes and the
spacers as shown. Torque screws to
approximately 8 in-lbs. The MTU should
be snug and suspended by the spacers
above the bottom surface of the pit lid by
approximately ½”.

Page 3

MTU Instruction

Page 40

for Armor Access Rubber Pit Lids

Intentionally Left Blank

MTU Instruction

Page 41

for Invensys Icon MTU/Electric Meter Assembly

Purpose & Scope

This instruction provides a procedure for installing FORM 2s and FORM 12S Invensys
Icon MTU/Electric Meter Assemblies.

Supplies and Tools Required

Physical Installation of the ICON Form 2S
and Form 12S MTU/Electric Meter
Assemblies into compatible meter
sockets can be accomplished without the
use of tools.

Testing of the meter socket, however,
may require specialized equipment.
Check with the local electric utility for
required testing procedures.

WARNING!

Be sure to follow all local
safety procedures and do not
touch the exposed electrical
terminals in the meter socket.
These terminals carry the full
incoming service voltage.
Touching these terminals may
result in death or serious
injury.

Installation Procedure

Step 1 – Complete all test procedures

required by the local electric utility and
verify that the meter socket has been
correctly installed and wired.

471-2007 - 2/28/2006

MTU Instruction

Page 42

for Invensys Icon MTU/Electric Meter Assembly

Step 2 – (For Form 12S meters only –
Skip this step for Form 2S meters) The

neutral-blade of the Form 12S meter can
be moved. The figure below shows the
rear of the meter base with the neutral­blade in the factory default, 9 o’clock
position (referenced by looking into the
meter socket.)

The neutral-blade can be moved to the 6
o’clock or 3 o’clock position to fit varying
Form 12S meter sockets using a #1
Phillips screwdriver, as follows:

e. Replace screws – Place the two

screws in the new neutral-blade
location.

Step 3 – Place the meter/MTU assembly
into the meter socket, carefully aligning
the contact blades with the corresponding
jaws in the meter base.

Step 4 – Install a T-bar and /or any seals
necessary to meet local requirements.

Step 5 – Make a final visual inspection to
ensure that the meter/MTU assembly is
seated and sealed properly.

Step 6 – Installation is now complete,
program the MTU using the STAR
Programmer Software and your MTU
Programmer.

When programming the integral MTU
mounted in this meter, hold the
programming coil above the top center of
the meter, as shown here.

a. Locate the configurable neutral-

blade – On the rear of the meter

base, locate the configurable
neutral-blade.

b. Remove screws – Remove the

two screws on either side of the
neutral-blade.

c. Remove neutral-blade – Remove

the neutral-blade from its molded
socket.

d. Seat neutral-blade – Seat the

neutral-blade into the desired
location.

Note: When replacing the screws, ensure
that they are snug, and that the heads are
flush with the neutral-blade.

MTU Instruction

Page 43

for STAR Submetering MTUs with Pulse Adapters

Purpose & Scope

This instruction provides procedures for installing and programmin STAR MTUs equipped
with voltage or temperature sensing pulse adapters including the following: 501-7786P,

501-7786T, 501-7786-PP, 501-7786PR, 501-7786PT, 501-7786PT2. Please also refer to
Publication 471-2000, General Installation and Wiring Guidelines for general information
covering the wiring and mounting of STAR MTUs.

Parts Required

Item Part Number Quantity

Submetering MTU with temperature sensing pulse adapter. 501-7786T 1

(As required)

Submetering MTU with voltage sensing pulse adapter. 501-7786P 1

(As required)

Dual-port Submetering MTU with voltage sensing pulse
adapters.

Dual-port Submetering MTU with a voltage sensing pulse
adapter and a reed switch input.

Dual-port Submetering MTU with voltage and temperature
sensing pulse adapters.

Thermocouple, Type E, 20 gauge 071-0850

Wire Splice, 3M Scotchlok 314 043-1914

Cable Tie, 5.6”, Black, UV 067-0007

Pressure Sensitive Hold-downs 067-0051

Drywall screws, #6 x 2” Phillips, coarse (for indoor use) Source locally
Plastic masonry anchors #6 – 12 x 1”, ¼” diameter Source locally

501-7786PP 1

(As required)

501-7786-PR 1

(As required)

501-7786-PT 1

(As required)

1 per

temperature

sensing port.

2 per

temperature

sensing port.

3 per

temperature

sensing port.

2 per

temperature

sensing port.
2 per MTU
2 per MTU

471-2008 - 2/22/2008

MTU Instruction

Page 44

for STAR Submetering MTUs with Pulse Adapters

Tools Required

• Crimping Pliers for Insulation
Displacement Connectors (IDCs)

• Wire cutters/stripper

• Cleaner (non-residue type) and

rag/paper towel

• Stapler for ¼” wire and cable
(Arrow T-25M)

Introduction

STAR Submetering MTUs with Pulse
Adapters provide accurate, high­resolution data for point-of-use allocation
billing for a wide variety of HVAC
appliances.

Note: Only on-off devices are suitable for
application of these pulse adapter MTUs.

• Voltage Sensing Pulse
Adapters can be applied to

gas appliances that are
controlled by a standard
24VAC gas valve.

• Temperature Sensing Pulse
Adapters can be applied to

gas water heaters, fireplaces
and other HVAC appliances
that do not have 24 VAC
controls

These units produce an extremely
accurate pulse at a rate of 10 seconds
per pulse (0.1 Hz or 6 pulses per minute)
when the specified input conditions
(voltage or temperature) are met. These
pulses are counted by the MTU which
periodically transmits the accumulated
count to nearby Data Collector Units.

Note: The submetering MTUs discussed
in this instruction are for indoor use (dry
locations) only.

Connecting Voltage Sensing (Type P) Inputs

Voltage Sensing (Type P) inputs are
provided with a 2-wire connection that
can be wired across (in parallel with) the
24 VAC gas valve solenoid of the furnace
or other HVAC appliance.

Simply connect the RED and BLACK
wires across the gas valve solenoid.
Once connected in this way, a voltage of
between 18 and 30 VAC applied across
the valve solenoid will cause the MTU to
begin pulsing and recording usage.

CAUTION

Do not connect the white wire
of the MTU when connecting
voltage sensing inputs. Cut
the white wire back to the
cable jacket. Connecting the
white wire may damage the
MTU.

Typical Furnace Application

This procedure covers a typical
installation of a voltage/current sensing
pulse adapter on a gas furnace.

Step 1 - Turn the furnace setting to "Pilot"
so that it will not operate during the
installation process.

Step 2 - Mount the MTU on a wall, joist or
other convenient location near the
furnace to be monitored. Run the cable
from the MTU to the gas valve solenoid of
the device. Trim or extend the MTU
cable, as needed. Care must be taken to
protect the cable from damage by hot
surfaces or sharp sheet metal. Use
insulated staples or cable ties as needed.

Note: Be sure to follow all General
Mounting & Wiring Guidelines outlined in
Publication 471-2000.

MTU Instruction

Page 45

for STAR Submetering MTUs with Pulse Adapters

Step 3 – Connect the RED and BLACK

leads from the MTU across (in parallel
with) the 24 VAC control input to the gas
valve. On most gas valves, these
connections can be made at the terminals
on the gas valve solenoid.

Step 4 – Program the MTU using the
MTU Programmer as outlined in the
Programming section of this document.

Step 5 - Return the furnace setting to
"Run".

Connecting Temperature Sensing (Type T) Inputs

Temperature Sensing (Type T) inputs are
provided with a two wire connection
designed to be directly connected to a
Type E thermocouple that is supplied with
the temperature sensing MTU. When the
thermocouple reaches a temperature of

◦

110

- 130◦ C (230◦ - 265◦ F), the MTU will

begin pulsing and recording usage.
By convention, Type E thermocouples are

supplied with two color-coded leads.

● The VIOLET lead is the positive
side and must be connected to the

RED wire of the MTU Input Cable.

● The RED lead of the thermocouple
is the negative side and must be
connected to the BLACK wire of
the MTU input cable.

Typical Hot Water Heater Application

This procedure covers a typical
installation of a temperature sensing
pulse adapter on a gas hot water heater.

Step 1 - Turn the hot water heater setting
to "Pilot" so that the heater will not
operate during the installation process.

Step 2 - Insert the copper thermocouple
sleeve into the space under the draft­inducer cone at the top of the water
heater. Position the tip of the
thermocouple INTO the center of the flue
as shown below. ( ½ to ¾ of an inch)

MTU Instruction

Page 46

for STAR Submetering MTUs with Pulse Adapters

Gently shape the copper sleeve on the
thermocouple so that it does not contact
the metal surface of the draft hood or the
top of the hot water tank as shown in the
side view illustration.

Step 3 - Clean the surface area of the hot
water heater under the thermocouple.
Dry thoroughly. Locate and mount the
two pressure sensitive hold-downs in the
cleaned area. Locate one hold-down at
the approximate center of the copper
sleeve and the other at the very end so
that they firmly anchor the thermocouple.
Thread a cable tie through the slot in the
hold-downs to fasten the thermocouple.
If necessary, gently form the copper
sleeve to facilitate mounting while
insuring that the tip of the thermocouple is
in the center of the flue and the copper
sleeve is not in contact with metal
surfaces.

Step 4 - After the thermocouple sleeve is
secure, route the thermocouple wire near
the inlet or outlet water pipe. Use the
third cable tie to secure the thermocouple
wire to the pipe as a strain relief.

Step 5 - Mount the MTU on a wall, joist or
other convenient mounting location using
two screws. Run the cable from the MTU
to the end of the thermocouple wire. Trim
excess MTU cable, as needed. Care
must be taken to protect the cable from
damage by hot surfaces or sharp sheet
metal. Use insulated staples or cable ties
as needed.

Note: Be sure to follow all General
Mounting & Wiring Guidelines outlined in
Publication 471-2000.

● Connect the VIOLET
thermocouple wire to the RED
MTU wire.

● Connect the RED thermocouple
wire to the BLACK MTU wire.

Do not remove the insulation from either
the MTU wires or the thermocouple wires;
the IDC is designed to pierce the
insulation.

Step 7 – Program the MTU using the
MTU Programmer as outlined in the
Programming section of this document.

Step 8 - Return the hot water heater
setting to "Run".

Typical Burner/Fireplace Application

This procedure covers a typical
installation of a temperature sensing
pulse adapter on a burner or fireplace.

Step 1 - Set burner or fireplace control so
that the appliance does not come on
during installation.

Step 2 - Fasten thermocouple so that the
tip is near, but not in, the flame when the
gas is burning. Use metal clamps or wire
fasteners to secure the thermocouple.
(NOTE: Clamps or wire fasteners are not
provided by Hexagram. Individual
installation conditions will determine the
type of fastener to be used.) A location
must be selected that allows the
thermocouple tip to reach at least 130° C
(400° F). However, the tip temperature
must not exceed 350° C (660° F). If a
pilot light is present, keep the
thermocouple at least 6" away from the
pilot flame.

Step 6 - Splice the MTU wire to the
thermocouple wire using the two IDCs
provided.

Step 3 - Route thermocouple wire away
from the appliance.

MTU Instruction

Page 47

for STAR Submetering MTUs with Pulse Adapters

Step 4 - Mount the MTU on a wall, joist or

other convenient mounting location well
away from the heat source using two
screws.

CAUTION

The MTU must be located
away from the appliance and
ONLY in a location that
remains at room temperature.

Run the cable from the MTU to the end of
the thermocouple wire. Trim excess MTU
cable, as needed. Care must be taken to
protect the cable from damage by hot
surfaces or sharp sheet metal. Use
insulated staples or cable ties as needed.

Note: Be sure to follow all General
Mounting & Wiring Guidelines outlined in
Publication 471-2000.

Step 5 - Splice the MTU wire to the
thermocouple wire using the IDCs
provided. Use a cable tie(s) to provide
strain relief for the wiring.

Step 8 - Reset the burner or fireplace
control so that the appliance can run.

Programming

Note: The 501-7786PT2 MTU requires
Star Programmer Software version 6.0.0
and meter table version 3.85 or higher.

Step 1 - Turn on the Psion MTU

Programmer by pushing On/Esc.

Note: A “Communication Error”
message may occur:

● If an attempt is made to read
and/or program the MTU and the
MTU is receiving input from the
gas appliance to which it is
wired.

OR

● If an attempt is made to read
and/or program the MTU and
there is a wiring error in the
wiring between the MTU and the
thermocouple.

● Connect the VIOLET
thermocouple wire to the RED
MTU wire.

● Connect the RED thermocouple
wire to the BLACK MTU wire.

Do not remove the insulation from either
the MTU wires or the thermocouple wires;
the IDC is designed to pierce the
insulation.

Step 6 - Secure the MTU wire. Verify
that the MTU cable does not run near the
burner and does not enter any region
where the temperature will exceed 70° C
(160° F).

Step 7 – Program the MTU using the
MTU Programmer as outlined in the
Programming section of this document.

Verify that the gas appliance is off and
that the thermocouple is correctly
connected.

Step 2 - Highlight the STAR icon (in the

Psion desktop screen) using the left/right
arrow keys. Press

At this point, the STAR software loads
along with the Meter table, Database
table, and Appointment table. If these are
loading for the first time, it may take
several minutes. When complete, the
serial number verification screen will
appear.

Enter.

MTU Instruction

Page 48

for STAR Submetering MTUs with Pulse Adapters

Step 3 - A screen asking if the operator

wishes to change the Psion’s serial
number is displayed.

This number should match the last four
digits of the serial number etched on the
back of the Psion. Typically, select

N to

accept the serial number as is. Pressing
will take the operator to a screen where
the serial number can be changed, if
necessary.

Step 4 – You are now at the logon

screen.

Y

NOTE: - At midnight, the software
automatically resets to require re-entry of
the log-on information. This is a security
measure in case the Psion is lost or
stolen.

Step 5 - The “Set Time & Date” screen is

displayed.

Make any corrections to the time and
date as required. Press Enter when
finished. It is not necessary to reset the
time if it is less than 5 minutes off.

Step 6 - The main menu of the STAR
software is now displayed.

Log on by entering the following
information:

a - Operator: The Psion operator file
will accommodate up to 99 separate
operator user codes. This user code is
“Install” followed by an assigned
operator code. Enter your assigned
code number immediately after “Install”
without any spaces. Press Enter when
finished. Example: Install6

b - Enter the password. This password
will typically be assigned by a project
manager. Press
Example:

Acme

Enter when finished.

Note: Use the DEL key to backspace and
make corrections.

At the top of the screen the installer
identification is displayed. The bottom of
the screen has instructions for navigation.
Most of the screens in the STAR software
have this instruction feature at the bottom
of the screen. The menu consists of
options you can select, as described in
the following table. The actual options
you see will depend on the configuration
of your system. Some choices may not
be available on your system.

MTU Instruction

Page 49

for STAR Submetering MTUs with Pulse Adapters

STAR Programming Software – Main Menu Choices

Menu Item Function

Add MTU Select this item when a new MTU is being connected to an existing meter.
Add MTU And Replace

Meter
Add MTU And Meter Select this item when a new MTU and meter are being installed where no

Replace MTU Select this when an existing MTU is being replaced and no meter changes are

Replace Meter Select this when an existing meter is being replaced and no MTU changes are

Replace MTU And
Meter

Reprogram MTU Use this selection when reprogramming an MTU with no equipment changes.
Read MTU Select this to read the current configuration information from an MTU.
Turn MTU Off Select this to turn an MTU off, causing its transmissions to stop.
Operator log-off

About STAR
Programmer

Select this item when a new MTU is being added and the current meter is being
replaced.

previous equipment existed.

occurring.

occurring.
Select this when an existing MTU and meter are being replaced.

To log off the STAR Programmer software, select this option and press
Choose this menu option if you need to contact a customer service representative

at Hexagram.

Enter.

To select the desired programming mode,
use the up/down arrow keys to scroll to
the mode on the STAR program Main
Menu screen and press Enter. Follow the
instructions on the screen and enter the
requested data. At any time before
installation data is actually written to the
MTU, the operator can cancel out of the
programming operation by pressing

On/Esc. The operator will be required to

enter a reason as to why programming
was cancelled.

Once programming has been
successfully completed, the MTU will be
turned on and will Start transmitting its
wake up data to the DCU every five
minutes. It will transmit for less than a
second of every five minutes for forty-five
minutes.

MTU Instruction

Page 50

for STAR Submetering MTUs with Pulse Adapters

Intentionally Left Blank

MTU Instruction

Page 51

for AMCO and ABB Water Meters

Purpose & Scope

This instruction provides wiring information for use in connecting a STAR MTU to AMCO
and/or ABB water meters (all sizes) equipped with Invision, Scancoder, RS Pulser, Type
A Industrial Pulser, or AMCO Digital registers and with the AMCO/ABB V100/PSMT
meter, and the S130/5UM hot and cold water meters.

Invision

Scancoder

MTU Cable Invision Register

Red G (Green)
Black B (Black)
White R (Red)

Supplies and Tools Required

See Publication 471-2000, General
Installation and Wiring Guidelines for a

complete list of recommended tools and
supplies for MTU Installation.

Installation Procedure

Step 1 - Select a mounting location for

the MTU that will allow optimum signal
transmission, and install any needed
wiring. Be sure to follow all General
Installation and Wiring Guidelines as
outlined in Publication 471-2000.

MTU Cable Scancoder Register

Red G (Green)
Black B (Black)
White R (Red)

Step 2 – Select the wiring diagram that

applies to the meter you are connecting
and make the appropriate wiring
connections.

a. Direct Wiring to Meter - MTU wiring

is supplied stripped to a standard
length that fits water meters with
screw terminals. Simply wrap the
wires around the screw terminal and
tighten the screw. It is recommended
that the screws be tightened to no
more than 4 – 5 in-lbs. Overtightening
the screw can stress and possibly
fracture the wire.

471-2009 - 2/28/2006

MTU Instruction

Page 52

for AMCO and ABB Water Meters

b. Water Meter with Integral Cable - If

the water meter is supplied with an
integral cable and a cable-to-cable
splice is necessary, use a gel-filled
wire splice designed for outdoor
(moisture applications) to seal the
individual connections.

Note: When connecting a dual port MTU
to a compound meter, connect port 1
(black jacket) to the primary, or high-flow
register and port 2 (grey jacket) to the
secondary or low-flow register.

RS Pulser

Type A Industrial Pulser

MTU Cable

Red

Black

Type A Industrial

Pulser Register

+ Positive

- Negative

MTU Cable RS Pulser Register

Red R (Red)
Black B (Black)
White B (Black)

No Connection G (Green)

White

AMCO Digital Register

MTU Cable

Red R (Red)

Black B (Black)

- Negative

AMCO Digital

Register

White B (Black)

No Connection G (Green)

MTU Instruction

Page 53

for AMCO and ABB Water Meters

Step 3 – Make a final visual check of the

wiring from the MTU to the meter register.
Verify that the cable routing is neat,
secure and professional.

Step 4 – Once installation and wiring are
complete, program the MTU using the
STAR Programmer Software and your
MTU Programmer.

V100/PSMT

S130/5UM Hot Water

MTU Cable S130/5UM Cable

Red Brown
Black White
White White

S130/5UM Cold Water

MTU Cable V100/PSMT Cable

Red Red
Black Blue
White Blue

No Connection Black
No Connection Yellow

MTU Cable S130/5UM Cable

Red Brown
Black White
White White

MTU Instruction

Page 54

for AMCO and ABB Water Meters

Intentionally Left Blank

MTU Instruction

Page 55

for Neptune and Schlumberger Water Meters

Purpose & Scope

This instruction provides wiring information for use in connecting a STAR MTU to Neptune
and/or Schlumberger water meters (all sizes) equipped with ARB-V, Auto/ProRead, or

E-Coder PLUS registers.

ARB-V or Auto/ProRead

E-Coder PLUS

ARB-V or

MTU Cable

Red B (Black)
Black G (Green)
White R (Red)

Auto/ProRead

Register

Notes:

• Auto/ProRead registers must be
programmed by the manufacturer for
3-wire mode.

MTU Cable

Red B (Black)
Black G (Green)
White R (Red)

E-Coder PLUS

Register

Notes:

• E-Coder Plus registers require a
special purpose NTG MTU (Hexagram
Part Number 501-11586D) to make
use of the E-Coder’s advanced leak,
tamper and reverse flow detection
capabilities.

471-2010 - 8/6/2006

MTU Instruction

Page 56

for Neptune and Schlumberger Water Meters

Supplies and Tools Required

See Publication 471-2000, General
Installation and Wiring Guidelines for a

complete list of recommended tools and
supplies for MTU Installation.

Installation Procedure

Step 1 - Select a mounting location for

the MTU that will allow optimum signal
transmission, and install any needed
wiring. Be sure to follow all General
Installation and Wiring Guidelines as
outlined in Publication 471-2000.

Step 2 – Select the wiring diagram that

applies to the meter you are connecting
and make the appropriate wiring
connections.

a. Direct Wiring to Meter - MTU

wiring is supplied stripped to a
standard length that fits water
meters with screw terminals.
Simply wrap the wires around the
screw terminal and tighten the
screw. It is recommended that the
screws be tightened to no more
than 4 – 5 in-lbs. Over-tightening
the screw can stress and possibly
fracture the wire.

Step 3 – Make a final visual check of the
wiring from the MTU to the meter register.
Verify that the cable routing is neat,
secure and professional.

Step 4 – Once installation and wiring are
complete, program the MTU using the
STAR Programmer Software and your
MTU Programmer.

NTG MTU

b. Water Meter with Integral Cable -

If the water meter is supplied with
an integral cable and a cable-to­cable splice is necessary, use a
gel-filled wire splice designed for
outdoor (moisture applications) to
seal the individual connections.

Note: When connecting a dual port MTU
to a compound meter, connect port 1
(black jacket) to the primary, or high-flow
register and port 2 (grey jacket) to the
secondary or low-flow register.

The NTG MTU is a special purpose MTU
designed specifically to support the
advanced capabilities of Neptune’s E­Coder solid-state register. This MTU
provides the following special functions
when coupled to an E-Coder Plus register
and properly programmed.

• 8-Digit Readings – The NTG MTU
reads and transmits the full 8-digit
reading from the E-Coder at the
programmed read interval, typically
every 12 hours. A full range of
read intervals are supported,
including temporary read intervals
for temporary monitoring purposes.

MTU Instruction

Page 57

for Neptune and Schlumberger Water Meters

• Alarm Polling – The NTG MTU
also automatically polls (reads) the
E-Coder alarm indicators every 15
minutes. This happens
automatically, independently of the
standard read interval mentioned
above. If the NTG MTU detects
any change in the alarm status
of the E-Coder Plus register, an
alarm transmission is generated
immediately, reporting the change
in alarm status to the DCUs.

Compatibility with Neptune E-Coder Registers

Hexagram’s NTG MTU is compatible with
Neptune E-Coder Plus solid state
registers revision 05.98 or higher.

Checking E-Coder Revision Level

To check the revision level of an E-Coder
register, use your hand to block all light
from striking the E-Coder’s solar cell for
approximately 20 seconds. Then,
remove your hand allowing light to strike
the solar cell. The E-Coder’s display will
briefly flash all 8s, and then reveal a
display like that shown below.

Compatibility with Neptune ARB-V and ProRead Registers

Upon initial installation, an NTG MTU can
also be used with meters equipped with
Neptune’s ARB-V or ProRead registers.
These are standard absolute encoder
registers without the advanced
capabilities of the E-Coder register.
When used with ARB-V or ProRead
registers, the NTG MTU operates in
standard mode, providing 6-digit readings
and no specialized alarm polling.

Note: Auto/ProRead registers must be
programmed by the manufacturer for 3­wire mode.

It is important to note that once an NTG
MTU is programmed to function in the
advanced mode with an E-Coder register,
it can no longer be returned to standard
operation. To caution the user, the
display shown below will appear when
first programming an NTG MTU for use
with an E-Coder:

The four digit number at the right of the
display is the revision level. In the
illustration above, the revision level
shown is 05.98.

CAUTION!

Once an NTG MTU is
programmed for use with an
E-Coder it can no longer be
used with other (non-E-Coder)
registers.

MTU Instruction

Page 58

for Neptune and Schlumberger Water Meters

Once the user selects Yes on the above
screen and successfully completes
programming the NTG MTU for use with
an E-Coder Plus register, the NTG MTU
can no longer be used with an ARB-V or
ProRead register. From this point
forward, only E-Coder meter types will be
available for selection when programming
this NTG MTU.

Error Codes

When an E-Coder meter type is selected
while programming an NTG MTU with the
MTU Programmer, the MTU attempts to
communicate with the register using a
special protocol that reads the status of
the E-Coders leak, tamper and reverse
flow detection indicators. If the MTU
cannot successfully communicate with
the register, an error code will be
displayed on the MTU Programmer, as
shown below.

This error indicates one of the following
problems:

• Attempting to use an E-Coder
meter type with a register that is
not an E-Coder.

• A defective E-Coder register.

• Improper wiring between the NTG

MTU and the E-Coder. (Refer to
Publication 471-2110 for E-Coder
wiring information.)

Pressing Enter in response to this
display will display the current settings for

the MTU, including the error code, as
shown below.

MTU Instruction

Page 59

for Sensus and Invensys Water Meters

Purpose & Scope

This instruction provides wiring information for use in connecting a STAR MTU to Sensus
and/or Invensys water meters (all sizes) equipped with ECR or ICE registers.

ECR or ICE

Installation Procedure

Step 1 - Select a mounting location for

the MTU that will allow optimum signal
transmission, and install any needed
wiring. Be sure to follow all General
Installation and Wiring Guidelines as
outlined in Publication 471-2000.

Step 2 – Select the wiring diagram that

applies to the meter you are connecting
and make the appropriate wiring
connections.

MTU Cable

Red R (Red)
Black B (Black)
White G (Green)

Sensus/Invensys

Register

Supplies and Tools Required

See Publication 471-2000, General
Installation and Wiring Guidelines for a

complete list of recommended tools and
supplies for MTU Installation.

Application Notes

• The 8-digit Sensus ICE Register must
be programmed to deliver 6
consecutive digits of reading
information for proper operation with
STAR MTUs.

a. Direct Wiring to Meter - MTU

wiring is supplied stripped to a

Note: When connecting a dual port MTU
to a compound meter, connect port 1
(black jacket) to the primary, or high-flow
register and port 2 (grey jacket) to the
secondary or low-flow register.

standard length that fits water
meters with screw terminals.
Simply wrap the wires around the
screw terminal and tighten the
screw. It is recommended that the
screws be tightened to no more
than 4 – 5 in-lbs. Overtightening
the screw can stress and possibly
fracture the wire.

b. Water Meter with Integral Cable -

If the water meter is supplied with
an integral cable and a cable-to­cable splice is necessary, use a
gel-filled wire splice designed for
outdoor (moisture applications) to
seal the individual connections.

471-2011 - 2/28/2006

MTU Instruction

Page 60

for Sensus and Invensys Water Meters

Step 3 – Make a final visual check of the

wiring from the MTU to the meter register.
Verify that the cable routing is neat,
secure and professional.

Step 4 – Once installation and wiring are
complete, program the MTU using the
STAR Programmer Software and your
MTU Programmer.

MTU Instruction

Page 61

for Hersey Water Meters

Purpose & Scope

This instruction provides wiring information for use in connecting a STAR MTU to Hersey
water meters (all sizes) equipped with Translator or ER2 registers.

Translator

MTU Cable Hersey Register

Red R (Red)
Black B (Black)
White G (Green)

Supplies and Tools Required

ER2

MTU Cable ER2 Cable

Red R (Red)
Black B (Black)
White G (Green)

Installation Procedure

See Publication 471-2000, General
Installation and Wiring Guidelines for a

complete list of recommended tools and
supplies for MTU Installation.

Application Notes

• The Hersey Translator Register must
be programmed for 6-digit readings for
proper operation with STAR MTUs.

471-2012 - 2/28/2006

Step 1 - Select a mounting location for

the MTU that will allow optimum signal
transmission, and install any needed
wiring. Be sure to follow all General
Installation and Wiring Guidelines as
outlined in Publication 471-2000.

Step 2 – Select the wiring diagram that

applies to the meter you are connecting
and make the appropriate wiring
connections.

MTU Instruction

Page 62

for Hersey Water Meters

a. Direct Wiring to Meter - MTU

wiring is supplied stripped to a
standard length that fits water
meters with screw terminals.
Simply wrap the wires around the
screw terminal and tighten the
screw. It is recommended that the
screws be tightened to no more
than 4 – 5 in-lbs. Overtightening
the screw can stress and possibly
fracture the wire.

b. Water Meter with Integral Cable -

If the water meter is supplied with
an integral cable and a cable-to­cable splice is necessary, use a
gel-filled wire splice designed for
outdoor (moisture applications) to
seal the individual connections.

Note: When connecting a dual port MTU
to a compound meter, connect port 1
(black jacket) to the primary, or high-flow
register and port 2 (grey jacket) to the
secondary or low-flow register.

Step 3 – Make a final visual check of the
wiring from the MTU to the meter register.
Verify that the cable routing is neat,
secure and professional.

Step 4 – Once installation and wiring are
complete, program the MTU using the
STAR Programmer Software and your
MTU Programmer.

MTU Instruction

Page 63

for Badger Water Meters

Purpose & Scope

This instruction provides wiring information for use in connecting a STAR MTU to Badger
water meters (all sizes) equipped with Read-O-Matic, RTR, or ADE registers.

RTR

MTU Cable RTR Cable

Red R (Red)
Black B (Black)
White G (Green)

Supplies and Tools Required

See Publication 471-2000, General
Installation and Wiring Guidelines for a

complete list of recommended tools and
supplies for MTU Installation.

Application Notes

• Some Badger RTR registers may be
provided with only a black wire and a
white wire with a shield. For this
variation, Trim the shield off and
connect as shown below.

MTU Cable RTR Cable

Black B (Black)
White B (Black)

Red W (White)

No Connection White-Shield

ADE

MTU Cable ADE Cable

Red R (Red)
Black B (Black)
White G (Green)

• The Badger ADE register must be
programmed for 6-digit readings for
proper operation with a STAR MTU.

Installation Procedure

Step 1 - Select a mounting location for

the MTU that will allow optimum signal
transmission, and install any needed
wiring. Be sure to follow all General
Installation and Wiring Guidelines as
outlined in Publication 471-2000.

Step 2 – Select the wiring diagram that

applies to the meter you are connecting
and make the appropriate wiring
connections.

a. Water Meter with Integral Cable -

If the water meter is supplied with
an integral cable and a cable-to­cable splice is necessary, use a
gel-filled wire splice designed for

471-2013 - 2/28/2006

MTU Instruction

Page 64

for Badger Water Meters

outdoor (moisture applications) to
seal the individual connections.

Note: When connecting a dual port MTU
to a compound meter, connect port 1
(black jacket) to the primary, or high-flow
register and port 2 (grey jacket) to the
secondary or low-flow register.

b. Direct Wiring to Meter - MTU

wiring is supplied stripped to a
standard length that fits water
meters with screw terminals.
Simply wrap the wires around the
screw terminal and tighten the
screw. It is recommended that the
screws be tightened to no more
than 4 – 5 in-lbs. Overtightening
the screw can stress and possibly
fracture the wire.

Step 3 – Make a final visual check of the
wiring from the MTU to the meter register.
Verify that the cable routing is neat,
secure and professional.

Read-O-Matic

MTU Cable

Red

Black

White

Read-O-Matic

Terminals

+ Positive

- Negative

- Negative

Step 4 – Once installation and wiring are

complete, program the MTU using the
STAR Programmer Software and your
MTU Programmer.

MTU Instruction

Page 65

for MLOG Sensors

Purpose & Scope

This instruction provides wiring information for use in connecting a STAR encoder-type
MTU to a Flow Metrix MLOG Sensor.

Use gel-filled wire splices designed for
outdoor applications to seal the individual
connections. For pit installations, seal
and enclose the three individual
connections using a direct burial splice kit
to complete the waterproof splice.

Note: If the MLOG sensor is connected to
a dual port MTU along with a meter, the
meter should be connected to port 1 and
the MLOG Sensor should be connected

Supplies and Tools Required

to port 2. For a dual port MTU, port 1 is
the black jacketed cable and the port 2
cable has a grey jacket.

See Publication 471-2000, General
Installation and Wiring Guidelines for a
complete list of recommended tools and
supplies for MTU Installation.

Installation Procedure

Step 1 – Mount the MLOG Sensor in

accordance with the manufacturer’s
instructions.

Step 2 - Select a mounting location for

the MTU that will allow optimum signal
transmission, and install any needed
wiring. Be sure to follow all General
Installation and Wiring Guidelines as
outlined in Publication 471-2000.

Step 3 – Connect the three wires from

the MTU cable to the three wires of the
MLOG cable as shown in the following
table.

MTU Cable MLOG Sensor

Step 4 – Make a final visual check of the

wiring from the MTU to the MLOG
Sensor. Verify that the cable routing is
neat, secure and professional.

Step 5 – Once installation and wiring are
complete, program the MTU using the
STAR Programmer Software and your
MTU Programmer. During programming,
select “MLOG LEAK DETECTOR” as the
meter type and set the read interval to 6
hours.

Note: The read interval for the MTU
connected to the MLOG Sensor MUST be
set for 6 hours.

Red R (Red)
Black B (Black)
White G (Green)

MTU Instruction

Page 66

for MLOG Sensors

Intentionally Left Blank

MTU Instruction

Page 67

for Rockwell/Equimeter Model 750-10000 Gas Meters

Purpose & Scope

This instruction provides a procedure for use in connecting a STAR MTU to an IMAC
Pulsimatic Transmitter and installing the Pulsimatic Transmitter on a
Rockwell/Equimeter Model 750-10000 Intermediate or Large Capacity Diaphragm Gas

Meters. Please also refer to Publication 471-2000, General Installation and Wiring
Guidelines for general information covering the wiring and mounting of STAR MTUs.

Parts Required

Item Part Number Quantity

IMAC Pulsimatic Transmitter for Rockwell/Equimeter Model
750-10000 Intermediate and Large Capacity Diaphragm
Gas Meters. One pulse per revolution.

IMAC Mounting Hardware - Rockwell 069-8150F 1
Index Cover without security cap bosses

NOTE: This item is needed only if the existing Index Cover
has the security cap bosses. If
does not have the security cap bosses, it can be reused.

MTU, Reed/Weigand Pulse 501-6327R

1

Any STAR MTU with an available Type R Port may be used for this installation.

the existing Index Cover

471-2015 - 2/28/2006

035-8150A 1

056-5155D 1

1

1

MTU Instruction

Page 68

for Rockwell/Equimeter Model 750-10000 Gas Meters
Tools Required

• Slotted (Flat-blade) screwdrivers in
the following blade tip width sizes:
5/32” narrow-blade, 9/32”, and ½”.
If desired, use torque driver, 10
foot-lb. range.

• ½” combination (hand) wrench or
socket/ratchet wrench. A torque
wrench is recommended (30 inch­lb. range).

• 8” adjustable wrench.

• 5/16-18 blind-hole (bottoming) tap

and mating size T-handle.

• Canned compressed air.

Also see Publication 471-2000, General Installation and Wiring Guidelines for a complete list of recommended tools and supplies for MTU Installation.

Installation Procedure

Step 2 - When wiring to the IPT, support

the IPT off of the work surface on the
outside (topside) of its base so that
pressure is not applied to the center drive
shaft. Remove the cable clamp (screw)
from inside the base.

Step 3 – Trim the stripped ends of the

MTU cable to ¼” or slightly shorter. When
inserted into the terminal block, only a
small amount of bare wire should be
visible. Bare wire should not extend
beyond the walls of the terminal block.
This will present a shorting potential.

Step 4 – Feed the MTU input cable
through the sealtight strain relief in the
base of the IPT. Loop the cable so that
stripped ends of the wires can be easily
inserted into the terminal block screws.
The screws should already be open
enough. Place cable clamp over the wire
as shown.

There are two parts to this procedure.
First, the MTU must be wired to the IMAC
Pulsimatic Transmitter (IPT). Once this is
complete, you can then install the
Pulsimatic Transmitter onto the Rockwell
gas meter.

Wiring the MTU to the Pulsimatic

Step 1 – Unpack all of the components

required to install the IPT. This should
include the IPT itself, gasket and a
hardware kit that includes (2 each) brass
threaded rods, stainless flat-washers and
hex nuts.

Step 5 – Insert the BLACK and WHITE
wires into the COM terminal screw.
Tighten the screw.

Step 6 – Insert the RED wires into the NC
BLU terminal screw. Tighten the screw.

MTU Instruction

Page 69

for Rockwell/Equimeter Model 750-10000 Gas Meters

Step 7 – Pull most of the slack out of the

cable (leave a slight amount of slack) and
reattach cable clamp as shown below.

DO NOT pull the cable taut.

Step 8 – Tighten the nut on the sealtight

strain relief. You will need to tighten the
nut almost fully down (as shown) before it
will bite on the MTU cable.

Installing the Pulsimatic Transmitter

Step 1 – If necessary, remove tamper
seals that cover the index cover screws.
Loosen and remove screws securing the
index cover. You may discard these
screws as they will not be re-used.
Remove the cover. If the cover has the
tamper seal bosses, this cover will be
need to be replaced.

Step 9 – Check that all wired terminal
block screws are tight.

Step 10 – Depending on the installation
location, you may be able to mount the
MTU at this time. During installation, the
IPT body should be supported so as not
to hang (apply tension) on the MTU
cable. During the installation, do not allow
the heavier body of the IPT to suddenly
jerk the MTU cable as this could
potentially damage the cable internally.

Step 11 – Install the MTU into its
intended location per the recommended
procedure found in the standard
Hexagram MTU installation manual.

Step 2 – Loosen and remove the screws
securing the index to the index plate.
Save these screws as they will be re­used. Remove the index and set aside.

MTU Instruction

Page 70

for Rockwell/Equimeter Model 750-10000 Gas Meters

Step 3 – If the index cover screws were

difficult to remove, the threads in the
index plate may need to be cleaned out
before installing the hardware that retains
the IPT. Use the blind-hole tap to
carefully clean out/ clean up the threads
of the (2) cover holes. Blow out the holes
with compressed (canned) air.

NOTE: It is not necessary to clean the
index mounting-hole threads as these
holes are not reused.

Step 4 – Thread the (full thread) ends of
the securing studs (2) into the index cover
screw holes of the index plate. Lightly
snug the studs by grasping them by the
flat that is machined into the top of the
stud. Apply the gasket over the studs as
shown.

Step 6 – Place the IPT (middle set of
holes) over the mounting studs. Make
sure that the IPT drive pin engages the
fork of the meter drive foot.

Step 7 – Mount the register onto the base
of the IPT using the same screws that
originally secured the register to the index
plate (meter head). The drive foot of the
index must engage the fork of the IPT
drive shaft. Tighten/torque the screws to
approximately 4-5 ft-lb.

Step 5 – Before setting the IPT over the
mounting studs, you must align the shaft
drive pin of the IPT so that it will engage
inside the fork portion of the meter drive
foot.

NOTE: If the index cover that was
removed has the security cap boss
extensions, this cover will need to be
replaced with an index cover without the
security cap bosses.

Step 8 – Although not necessary, it may
be desired to keep water or dirt from
collecting in the unused corner mounting
holes. If closing them is desired, use a
permanent outdoor rated non-shrinking
putty or caulk such as an RTV.

for Rockwell/Equimeter Model 750-10000 Gas Meters

Page 71

Step 9 – Place the index cover onto the
studs. It will fit over the index one way
only. Apply a flat washer and nut onto
each stud. Snug, and then tighten these
nuts an additional ½ to ¾ turn maximum.
The finished torque value is 25 – 30 inch­lb.

MTU Instruction

Step 10 – Install Wire/Lead security seals

if desired. Installation is complete.

MTU Instruction

Page 72

for Rockwell/Equimeter Model 750-10000 Gas Meters

Intentionally Left Blank

MTU Instruction

Page 73

for American Model AL800-AL5000 Gas Meters

Purpose & Scope

This instruction provides a procedure for use in connecting a STAR MTU to an IMAC
Pulsimatic Transmitter and installing the Pulsimatic Transmitter on an American Model
AL800-AL5000 Industrial & Commercial Diaphragm Gas Meters. Please also refer to
Publication 471-2000, General Installation and Wiring Guidelines for general information

covering the wiring and mounting of STAR MTUs.

Parts Required

Item Part Number Quantity

IMAC Pulsimatic Transmitter for American Models AL800­AL5000 Commercial and Industrial Diaphragm Gas Meters.
One pulse per revolution. Long shaft.

IMAC Mounting Hardware - American 069-8150G 1
MTU 501-6327R

1

Any STAR MTU with an available Type R Port may be used for this installation.

471-2016 - 2/28/2006

035-8150B 1

1

1

MTU Instruction

Page 74

for American Model AL800-AL5000 Gas Meters
Tools Required

• Slotted (Flat-blade) screwdrivers in
the following blade tip width sizes:
5/32” narrow-blade, 9/32”, and ½”.

• ½” combination (hand) wrench or
socket/ratchet wrench. A torque
wrench is recommended (60 inch-lb.
range).

• 8” adjustable wrench.

• 18-18 blind-hole (bottoming) tap and

mating size T-handle.

• Canned compressed air.

Also see Publication 471-2000, General
Installation and Wiring Guidelines for a
complete list of recommended tools and
supplies for MTU Installation.

Installation Procedure

There are two parts to this procedure.
First, the MTU must be wired to the IMAC
Pulsimatic Transmitter (IPT). Once this is
complete, you can then install the
Pulsimatic Transmitter onto the American
gas meter.

Step 2 - When wiring to the IPT, support

the IPT off of the work surface on the
outside (topside) of its base so that
pressure is not applied to the center drive
shaft. Remove the cable clamp (screw)
from inside the base.

Step 3 – Trim the stripped ends of the

MTU cable to ¼” or slightly shorter. When
inserted into the terminal block, only a
small amount of bare wire should be
visible. Bare wire should not extend
beyond the walls of the terminal block.
This will present a shorting potential.

Step 4 – Feed the MTU input cable
through the sealtight strain relief in the
base of the IPT. Loop the cable so that
stripped ends of the wires can be easily
inserted into the terminal block screws.
The screws should already be open
enough. Place cable clamp over the wire
as shown.

Wiring the MTU to the Pulsimatic

Step 1 – Unpack all of the components

required to install the IPT. This will
generally include the IPT itself, gasket
and a hardware kit that includes (2 each)
brass threaded rods, stainless flat­washers and hex nuts.

Step 5 – Insert the BLACK and WHITE
wires into the COM terminal screw.
Tighten the screw.

Step 6 – Insert the RED wires into the NC
BLU terminal screw. Tighten the screw.

MTU Instruction

Page 75

for American Model AL800-AL5000 Gas Meters

Step 7 – Pull most of the slack out of the

cable (leave a slight amount of slack) and
reattach cable clamp as shown below.

DO NOT pull the cable taut.

Step 8 – Tighten the nut on the sealtight

strain relief. You will need to tighten the
nut almost fully down (as shown) before it
will bite on the MTU cable.

Step 9 – Check that all wired terminal
block screws are tight.

Step 10 – Depending on the installation
location, you may be able to mount the
MTU at this time. During installation, the
IPT body should be supported so as not
to hang (apply tension) on the MTU
cable. During the installation, do not allow
the heavier body of the IPT to suddenly
jerk the MTU cable as this could
potentially damage the cable internally.

plate assembly. You may discard these
screws as they will not be re-used.
Remove the index plate assembly from
the top of the meter. Do not disassemble
the index cover from the index plate.

Step 2 – If the index plate mounting
screws were difficult to remove, the
threads in the meter head (handhole
plate) may need to be cleaned out before
installing the hardware that will retain the
IPT and index plate stack. Use the blind­hole tap to carefully clean out/ clean up
the threads of the (2) cover holes. NOTE
THAT THESE THREADS ARE #18-18.
MAKE SURE TO USE THE PROPER
TAP. Blow out the holes with compressed
(canned) air.

Step 11 – Install the MTU into its
intended location per the recommended
procedure found in the standard
Hexagram MTU installation manual.

Installing the Pulsimatic Transmitter

Step 1 – If necessary, remove tamper
seals from any of the 4 screws that
secure the index plate. Loosen and
remove the screws securing the index

MTU Instruction

Page 76

for American Model AL800-AL5000 Gas Meters

Step 3 – Place the adapter plate

contained in the installation parts onto the
head of the meter with the ear holes
aligned over the index plate mounting
holes of the meter head. The embossed
“AL800-AL5000” on the adapter plate is
oriented to the front of the meter.

Step 4 – AFTER PLACING THE
APAPTOR PLATE, Thread the (18-18
thread) ends of the securing studs (4) into
the index cover screw holes of the index
plate. Lightly snug the studs by grasping
them by the flat that is machined into the
top of the stud.

Step 5 - Apply the seal plate over the
studs.

Step 6 – Before setting the IPT over the
mounting studs, you must align the shaft
drive pin of the IPT so that it will engage
inside the fork portion of the meter drive
foot.

for American Model AL800-AL5000 Gas Meters

Page 77

Step 7 – Place the IPT (4 corner holes)
over the mounting studs. Make sure that
the IPT drive pin engages the fork of the
meter drive foot.

MTU Instruction

Step 8 – Before mounting the index plate

assembly, the drive foot of the index must
engage the fork of the IPT drive shaft.
Mount the index plate assembly onto the
base of the IPT over the same (4) corner
studs.

Step 9 – Complete the assembly by
securing the index plate onto the studs,
with the supplied (4) flat washers and
nuts. Tighten these nuts a finished torque
of 60 inch-lb. (5 ft-lb.).

Step 10 – Install Wire/Lead security seals
if desired. Installation is complete.

MTU Instruction

Page 78

for American Model AL800-AL5000 Gas Meters

Intentionally Left Blank

MTU Instruction

Page 79

for Sprague/Schlumberger/Actaris Gas Meters

Purpose & Scope

This instruction provides a procedure for installing a STAR bracket direct-mount MTU on a

Sprague/Schlumberger/Actaris Model 175, 250 or 400 and 400A (slant-face) Gas
Meter.

Parts Required

Item Part Number Quantity

MTU, Bracket Direct Mount, for Sprague 175, 250 and 400 501-8150H-A or

501-8150HD5-A
#10-24 x 3/8” Slotted Fillister Head Machine Screw 069-102412HA 2
Wheel/Magnet Assembly 109-7126A 1

Tools Required

To mount the MTU to these meters, you
will need the following tools and
equipment:

• Safety goggles

• #1 and #2 Phillips screwdrivers

• #1 and #2 Slotted screwdrivers

• 5/32” diameter medium grit

tapered round file

• Metal nibbler tool, 1/8” cut

• Small, diagonal plastic cutting

pliers

See Publication 471-2000, General
Installation and Wiring Guidelines for a
complete list of recommended tools and
supplies for MTU Installation.

Installation Procedure

Before installing the MTU, anti-tamper,
safety, and security hardware must be
removed from the clear index cover.

Note: Early slant-face Sprague gas
meters were equipped with a cast
aluminum framed index cover held in
place by two screws. Later models are
equipped with a plastic index cover held
in place by three screws. This procedure
can be used with either style.

1

471-2017 - 2/28/2006

MTU Instruction

Page 80

for Sprague/Schlumberger/Actaris Gas Meters

Step 1 – Remove the clear index cover

from the meter by removing the screws
that hold it. The clear index cover and
index cover screws will be reused. Clean
and inspect these items and set them
aside until needed. Replace if damaged.

Step 2 – Remove the index by removing

the two screws that hold it to the meter.
Set the Index aside until later. The
screws that held the index to the meter
can be discarded.

Step 3 – Remove the drive foot from the

meter drive shaft by unthreading it
counterclockwise. The drive foot will not
be reused and can be discarded. Then,
thread the magnet wheel clockwise onto
the shaft. Tighten the magnet wheel until
snug to the end of the threads on the
drive shaft.

CAUTION!

Be careful not to cross-thread
the magnet wheel when
installing it on the meter drive
shaft. Cross-threading can
cause misalignment of the
magnet wheel which in turn
can cause binding or erratic
performance.

hooking the two tabs on the bracket
behind the heads of the index mounting
screws.

Step 6 – Replace the index by hooking
the two tabs on the index behind the
heads of the index mounting screws.
Insure that the drive foot on the index will
be driven by the pin on the magnet wheel
as it rotates. Several styles of indexes
and index drive mechanisms may be
encountered. Use the photos below as a
guide. Note that on indexes with a slotted
drive foot, it is intended that the pin on the
magnet wheel engages the slot on the
drive foot.

Brass Index with Slotted Drive Foot

Step 4 – Thread the two #10-24 x 3/8”

machine screws provided about one full
turn into the index mounting holes.

Step 5 – Place the MTU bracket
assembly into position on the meter,

MTU Instruction

Page 81

for Sprague/Schlumberger/Actaris Gas Meters

Brass Index with Offset Drive Foot

Plastic Index with Metal Drive Foot

Step 8 – Notch the index cover to allow

the sensor wire to exit through the bottom
left edge. On the clear plastic index
cover, you can remove (cut away) the
inner tab from the molded drain opening
at on the bottom left edge of the cover.

Position clear index cover on meter head
and route sensor cable though notch.

Step 7 – Route the sensor wire so that it
does not interfere with the magnet wheel
or the index gears. Hand tighten index
mounting screws. Gently move the 2-foot
hand to check for some free play to
insure that the register is not binding up.

NOTE: If the meter is equipped with a
cast aluminum framed index cover,
enlarge the drain hole at the bottom left
edge of the cover to approximately 5/32”
using a metal nibbler and/or tapered file.
Clean up any sharp edges with the
tapered file before mounting the index
cover.

MTU Instruction

Page 82

for Sprague/Schlumberger/Actaris Gas Meters

Step 9 – Secure MTU bracket assembly

and the clear index cover to the meter
head using the three screws that
originally held the clear index cover.
Tighten index cover screws.

Step 10 - Replace any anti-tamper,
safety, or security hardware onto the
clear index cover as required.

Step 11 – Once Installation is complete,
program the MTU using the STAR
Programmer Software and your MTU
Programmer.

MTU Instruction

Page 83

for Lancaster Model 250 Gas Meters

Purpose & Scope

This instruction provides a procedure for installing a STAR bracket direct-mount MTU on a

Lancaster Model 250 (slant-face) Gas Meter.

Parts Required

Item Part Number Quantity

MTU, Bracket Direct Mount, for Lancaster 250 501-8150H-B or

501-8150HD5-B
#10-24 x 3/8” Slotted Fillister Head Machine Screw 069-102412HA 2
Wheel/Magnet Assembly 109-7126A 1

Tools Required

To mount the MTU to these meters, you
will need the following tools and
equipment:

• Safety goggles

• #1 and #2 Phillips screwdrivers

• #1 and #2 Slotted screwdrivers

• 5/32” diameter medium grit

tapered round file

• Metal nibbler tool, 1/8” cut

• Small, diagonal plastic cutting

pliers

See Publication 471-2000, General
Installation and Wiring Guidelines for a

complete list of recommended tools and
supplies for MTU Installation.

Installation Procedure

Before installing the MTU, anti-tamper,
safety, and security hardware must be
removed from the clear index cover.

Step 1 – Remove the clear index cover

from the meter by removing the two
screws that hold it. The clear index cover
and index cover screws will be reused.
Clean and inspect these items and set
them aside until needed. Replace if
damaged.

1

471-2018 - 2/28/2006

MTU Instruction

Page 84

for Lancaster Model 250 Gas Meters

Step 2 – Remove the index by removing

the two screws that hold it to the meter.
Set the Index aside until later. The
screws that held the index to the meter
can be discarded.

Step 3 – Remove the drive foot from the

meter drive shaft by unthreading it
counterclockwise. The drive foot will not
be reused and can be discarded. Then,
thread the magnet wheel clockwise onto
the shaft. Tighten the magnet wheel until
snug to the end of the threads on the
drive shaft.

CAUTION!

Be careful not to cross-thread
the magnet wheel when
installing it on the meter drive
shaft. Cross-threading can
cause misalignment of the
magnet wheel which in turn
can cause binding or erratic
performance.

Step 6 – Replace the index by hooking
the two tabs on the index behind the
heads of the index mounting screws.
Insure that the drive foot on the index will
be driven by the pin on the magnet wheel
as it rotates. Several styles of indexes
and index drive mechanisms may be
encountered. Use the photos below as a
guide. Note that on indexes with a slotted
drive foot, it is intended that the pin on the
magnet wheel engages the slot on the
drive foot.

Brass Index with Slotted Drive Foot

Step 4 – Thread the two #10-24 x 3/8”

machine screws provided about one full
turn into the index mounting holes.

Step 5 – Place the MTU bracket
assembly into position on the meter,
hooking the two tabs on the bracket
behind the heads of the index mounting
screws.

MTU Instruction

Page 85

for Lancaster Model 250 Gas Meters

Brass Index with Offset Drive Foot

Plastic Index with Metal Drive Foot

Step 9 – Secure MTU bracket assembly

and the clear index cover to the meter
head using the two screws that originally
held the clear index cover. Tighten index
cover screws.

Step 10 - Replace any anti-tamper,
safety, or security hardware onto the
clear index cover as required.

Step 11 – Once Installation is complete,
program the MTU using the STAR
Programmer Software and your MTU
Programmer.

Step 7 – Route the sensor wire so that it
does not interfere with the magnet wheel
or the index gears. Hand tighten index
mounting screws. Gently move the 2-foot
hand to check for some free play to
insure that the register is not binding up.

Step 8 – Next, create an exit notch for the
sensor wire by using a nibbler or plastic
cutting plier to add a notch approximately
5/32” in diameter to the bottom left edge
of the clear index cover. Do not interfere
with the drain hole already molded into
the clear index cover. Clean up the
edges of the notch using a round tapered
file. Then position clear index cover on
meter head and route sensor cable
though notch.

MTU Instruction

Page 86

for Lancaster Model 250 Gas Meters

Intentionally Left Blank

MTU Instruction

Page 87

for Lancaster Model 175 Gas Meters

Purpose & Scope

This instruction provides a procedure for installing a STAR bracket direct-mount MTU on a

Lancaster Model 175 (slant-face) Gas Meter.

Parts Required

Item Part Number Quantity

MTU, Bracket Direct Mount, for Lancaster 175 501-8150H-C or

501-8150HD5-C
#6-32 x ¼” Phillips Panhead Machine Screw 069-063208AA 2
#6 Flat Washer (precision thickness) 069-2648 2
Wheel/Magnet Assembly 109-7126A 1

Tools Required

To mount the MTU to these meters, you
will need the following tools and
equipment:

• Safety goggles

• #1 and #2 Phillips screwdrivers

• #1 and #2 Slotted screwdrivers

• 5/32” diameter medium grit

tapered round file

See Publication 471-2000, General
Installation and Wiring Guidelines for a
complete list of recommended tools and
supplies for MTU Installation.

Installation Procedure

Before installing the MTU, anti-tamper,
safety, and security hardware must be
removed from the clear index cover.

1

• Metal nibbler tool, 1/8” cut

• Small, diagonal plastic cutting

pliers

471-2019 - 2/28/2006

MTU Instruction

Page 88

for Lancaster Model 175 Gas Meters

Step 1 – Remove the clear index cover

from the meter by removing the two
screws that hold it. The clear index cover
and index cover screws will be reused.
Clean and inspect these items and set
them aside until needed. Replace if
damaged.

Step 2 – Remove the index by removing

the two screws that hold it to the meter.
Set the index aside until later. The
screws that held the index to the meter
can be discarded.

Step 4 – Place the MTU bracket
assembly into position on the meter. Use
an index cover screw to temporarily hold
the MTU bracket assembly in position.

Route the sensor wire around the right­hand index-mounting post then back and
under the finger hook so that it does not
interfere with the magnet wheel or the
index gears.

Step 3 – Remove the drive foot from the

meter drive shaft by unthreading it
counterclockwise. The drive foot will not
be reused and can be discarded. Then,
thread the magnet wheel clockwise onto
the shaft. Tighten the magnet wheel until
snug to the end of the threads on the
drive shaft.

CAUTION!

Be careful not to cross-thread
the magnet wheel when
installing it on the meter drive
shaft. Cross-threading can
cause misalignment of the
magnet wheel which in turn
can cause binding or erratic
performance.

Step 5 – Reattach the index to the meter
using the screws and washers provided.

Note: The washers provided are a
precision thickness designed to properly
position the index. Use no substitutes.

The washers are to be placed between
the back of the index and the mounting
posts. The screws provided with the
MTU replace the original index mounting
screws. Insure that the drive foot on the
index will be driven by the pin on the
magnet wheel as it rotates, then hand
tighten the index mounting screws.
Gently move the 2-foot hand to check for
some free play to insure that the register
is not binding up.

Step 6 – Next, create an exit notch for the
sensor wire by using a nibbler or plastic
cutting plier to add a notch approximately
5/32” in diameter to the bottom left edge
of the clear index cover. Do not interfere
with the drain hole already molded into

for Lancaster Model 175 Gas Meters

Page 89

the clear index cover. Clean up the
edges of the notch using a round tapered
file. Then position clear index cover on
meter head and route sensor cable
though notch.

Step 7 – Secure MTU bracket assembly
and the clear index cover to the meter
using the screws that originally held the
clear index cover. Tighten index cover
screws.

Step 8 - Replace any anti-tamper, safety,
or security hardware onto the clear index
cover as required.

Step 9 – Once Installation is complete,
program the MTU using the STAR
Programmer Software and your MTU
Programmer.

MTU Instruction

MTU Instruction

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for Lancaster Model 175 Gas Meters

Intentionally Left Blank

MTU Instruction

Page 91

for Mini-Max Electronic Gas Volume Corrector

Purpose & Scope

This instruction provides a procedure for use in wiring and mounting a STAR MTU to a
Mercury Mini-Max Electronic Gas Volume Corrector that has been programmed to be
compatible with the STAR MTU. Please also refer to Publication 471-2000, General
Installation and Wiring Guidelines for general information covering the wiring and mounting
of STAR MTUs.

Parts Required

Item Part Number Quantity

Gas Bracket Direct Mount MTU for use with the Mini-Max. 501-8150R or 501-

8150RR

Tools Required

• 5/32” narrow-blade, slotted (flat-blade)

screwdriver

• Phillips screwdriver

• 8” adjustable wrench.

• Wire cutter/stripper

471-2020 - 2/28/2006

Also see Publication 471-2000, General
Installation and Wiring Guidelines for a

complete list of recommended tools and
supplies for MTU Installation.

1

MTU Instruction

Page 92

for Mini-Max Electronic Gas Volume Corrector
Installation Procedure

Step 1 – Attach the MTU Bracket

Assembly onto the top of the Mini-Max
gasket and to the gas meter by removing
the appropriate hardware from the gas
meter and then reinstalling the hardware.

connector cap back onto the stain relief
and hand tighten.

Step 4 – Remove the terminal block TB1
from the circuit board. This will unplug by
pulling it straight out. The top terminal
(Terminal 1) is common.

Step 2 – If both the corrected and

uncorrected readings from the Mini-Max
will be monitored, there will be two wires
coming out of the back of the 501­8150RR MTU thru a notch in the bracket.
One wire is black and connects to port 1
of the MTU. This will be used for the
Corrected Reading. The gray wire
connects to port 2 of the MTU and will be
used for the Uncorrected reading.

If only the corrected reading will be
monitored, the 501-8150R MTU will have
only a single black wire which is used for
the corrected reading.

Step 3 – Remove the smaller strain relief

connector nut completely and place it
over the wire(s). Push the wire(s) into the
connector leaving approximately 4 to 5
inches of wire inside the unit. Place the

Terminal Signal

1 Common
2 Corrected Pulse Output
3 Uncorrected Pulse Output
4 Alarm (-)
5 Alarm (+)

Step 5 – Strip ¼ inch of insulation off of
each MTU wire. Insert the black and
white wires into Terminal 1 (Common).
Tighten the screw on the side. Make sure
the wires are captured securely. Insert

MTU Instruction

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for Mini-Max Electronic Gas Volume Corrector

the red wire from the black cable into
Terminal 2. Tighten the screw on the
side. Insert the red wire from the gray
cable (if used) into Terminal 3. Tighten
the screw on the side.

Step 6 – Press the terminal block back
onto the connector on the circuit board.
Make sure that it seats fully. This
completes the wiring of the MTU.

Mini-Max Configuration

• Item No. 090 and 092 need to be
programmed to match the scaling
in the MTU. Ex. Code 1 = CU FT x
10; Code 2 = CU FT x 100.

Other settings may be needed for the
Mini-max to operate correctly. See the
Mini-Max Operators Guide for further
instructions.

Notes

The Mini-Max must be properly
programmed to have the corrected and
uncorrected outputs available on TB1.
Per the Mini-Max Operator’s Guide:

• Item No. 093 should be set to
Code 0. This will select the
Corrected output to be on for TB1
slot 2.

• Item No. 094 needs to be
programmed to Code 2 in order to
select the Uncorrected output to be
on TB1 slot 3.

• Item 096 and 097 should be set to
Code 2, which will set the display
to 6 digits and match the reading
length stored in the MTU.

• Item No. 115 should be left at the
default of 0 which will give a pulse
width of 0.0625 Sec.

MTU Instruction

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for Mini-Max Electronic Gas Volume Corrector

Intentionally Left Blank

MTU Instruction

Page 95

for Sprague Model 175 Gas Meters

Purpose & Scope

This instruction provides a procedure for installing a STAR indirect-mount MTU on a

Sprague Model 175 (flat-face) Gas Meter.

Parts Required

Item Part Number Quantity

MTU, Indirect Mount, for Sprague 175 501-6327H,

501-6327HH or

501-6327HD5
10-24 x 3/8” Slotted, Fillister Head Machine Screw 069-102412HA 2
Wheel/Magnet Assembly 109-7126A 1
MTU spacer for pipe or bar mount 056-5155K 1
18″ heavy-duty UV-resistant tie wrap
10-32 x 1½″ pan head machine screw
10-32 nut, stainless steel 069-3011 2
#10 7/16” flat washer, stainless steel 069-3004 2

471-2021 - 2/28/2006

067-0030 2

069-103248CS 2

1

MTU Instruction

Page 96

for Sprague Model 175 Gas Meters
Tools Required

To mount the MTU to these meters, you
will need the following tools and
equipment:

• Small, diagonal plastic cutting
pliers

• 7/16″ boxwrench

• Safety goggles

• #1 and #2 Phillips screwdrivers

• #1 and #2 Slotted screwdrivers

See Publication 471-2000, General
Installation and Wiring Guidelines for a

complete list of recommended tools and
supplies for MTU Installation.

Installation Procedure

Installing the Sensor Assembly

Before installing the Sensor Assembly,
anti-tamper, safety, and security
hardware must be removed from the clear
register cover.

Step 1 – Remove the clear index cover

from the meter by removing the screw
that holds it. The clear index cover and
the index cover screw will be reused.
Clean and inspect these items and set
them aside until needed. Replace if
damaged.

Step 2 – Remove the index by removing

the two screws that hold it to the meter.
Set the index aside until later. The
screws that held the index to the meter
can be discarded.

Step 3 – Remove the drive foot from the

meter drive shaft by unthreading it
counterclockwise. The drive foot will not
be reused and can be discarded. Then,
thread the magnet wheel clockwise onto
the shaft. Tighten the magnet wheel until
snug to the end of the threads on the
drive shaft.

MTU Instruction

Page 97

for Sprague Model 175 Gas Meters

CAUTION!

Be careful not to cross-thread
the magnet wheel when
installing it on the meter drive
shaft. Cross-threading can
cause misalignment of the
magnet wheel which in turn
can cause binding or erratic
performance.

Step 4 – Start the two 10-24 x 3/8”
machine screws into the index mounting
holes. Thread each screw in
approximately one full turn.

Step 6 – Replace the index by hooking
the two tabs on the index behind the
heads of the index mounting screws.
Insure that the drive foot on the index will
be driven by the pin on the magnet wheel
as it rotates. Several styles of indexes
and index drive mechanisms may be
encountered. Use the photos below as a
guide. Note that on indexes with a slotted
drive foot, it is intended that the pin on the
magnet wheel engages the slot on the
drive foot.

Brass Index with Slotted Drive Foot

Step 5 – Attach the sensor to the meter

by positioning the keyhole-shaped slots of
the sensor bracket over the index
mounting screws as shown here. Route
the sensor wire through the slot at the
bottom right-hand corner of the sensor
bracket and back to the left under the
magnet wheel so that it does not interfere
with the magnet wheel or the index gears.

Brass Index with Offset Drive Foot

MTU Instruction

Page 98

for Sprague Model 175 Gas Meters

Plastic Index with Metal Drive Foot

Step 7 – Route the sensor wire so that it

does not interfere with the magnet wheel
or the index gears. Hand tighten index
mounting screws. Gently move the 2-foot
hand to check for some free play to
insure that the register is not binding up.

Step 8 – Next, create an exit notch for the
sensor wire by cutting away a small piece
of the corner where the left hand edge of
the clear index cover meets the ridge at
the bottom of the meter head.

Step 9 – Secure the clear index cover to
the meter using the screw that originally
held it. Tighten the index cover screw.

Step 10 - Replace any anti-tamper,
safety, or security hardware onto the
clear index cover as required.

Bar Mounting the MTU

Step 1 - Thread the tie-wraps into the
MTU spacer as shown here.

Step 2 - Attach the spacer to the MTU
using the provided screws and washers.
Tighten the screws to 12 to 15 in-lb. On a

MTU Instruction

Page 99

for Sprague Model 175 Gas Meters

standard drill driver with 0 to 24 torque
settings, this is typically the #10 setting.

Step 3 - Wrap the tie wraps around the
bar as needed, pulling the ties around
(through the spacer plate) as they are
tightened.

Step 4 - Adjust the MTU as needed and
pull the tie wraps tight.

Step 5 - Trim off the excess tie wrap,
leaving about a ½” tab.

Step 6 – Once Installation is complete,
program the MTU using the STAR
Programmer Software and your MTU
Programmer.

MTU Instruction

Page 100

for Sprague Model 175 Gas Meters

Intentionally Left Blank