User's Manual

MTU Instruction
for Sprague/Actaris 675A, 800A and 1000A Gas Meters
Tools Required
• Screwdriver, #2 Phillips
• Screwdriver, 3/8” slotted (flat-
blade)
• 7/16” box wrench
• 1/4-20 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 pulser must be mounted to the
meter. Once this is complete, you can
mount the MTU remotely or directly on
the pulser using the adapter provided. If
you are mounting the MTU on the pulser,
it can be mounted at either the front or
back of the meter.
Step 1 – If necessary, remove tamper
seals from any of the four screws that
secure the index cover to the meter body.
Step 2- Loosen and remove the four
screws securing the index cover to the
meter. You may discard these screws as
they will not be re-used. Remove the
index cover from the top of the meter.
Step 3 – Remove the two screws
securing the index to the top of the meter.
You may discard these screws as they
will not be re-used. Remove the index
and set it aside.
Step 4 – If the index base plate mounting
screws were difficult to remove, the
threads in the meter head may need to be
cleaned out before installing the hardware
that will retain the index base plate, the
pulser and the index box. Use the blind-
hole tap to carefully clean the threads of
the index base plate mounting holes.
CAUTION!
The index base plate
mounting holes use a 1/4-20
thread. Be sure to use the
proper tap. Using a tap other
than a ¼-20 tap will result in
damage to the meter head.
After using the tap, blow out the holes
with compressed (canned) air.
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