To isolate the sensor, it must be retracted from the pipe.
WARNING! SYSTEM MAY BE UNDER HIGH PRESSURE. Do not attempt to remove meters
from a pipe pressurized above 60 psig without rst relieving pressure in the pipe.
WARNING! When removing the ow meter, be sure to hold the electronics enclosure rmly
by hand before unscrewing the compression tting nut. Failure to do this will allow the
pressure in the pipe to suddenly and rapidly force the meter from the pipe potentially causing
serious injury. The meter could also be damaged resulting in a loss of gas from the pipe. The
force required to hold the meter will be 0.20 times the pipe pressure. If you are unsure of your
ability to hold the meter for any reason, do not loosen the compression tting nut.
Loosen the compression nut of the compression tting using two 7/8" wrenches. Once loosened, the
probe will be able to slide out (see Fig. 4.8 below).
Fig. 4.8: Loosening the Compression Fitting
7
/
8
”
w
r
e
n
c
h
1
3
/
1
6
”
w
r
e
n
c
h
Compression Nut
Adjacent Hex
With one hand supporting the meter, slide the probe up through the retractor until the internal stop
makes contact. Close the valve shut-o handle by turning the lever 90˚clockwise to isolate the sensor
within the chamber of the retractor (see gure 4.9).
Operation | 81
Model FT3
Operation
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