User's Manual

MTU Instruction
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.
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 501-
8150RR 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
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.
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
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