Flomec G Series Посібник користувача - Сторінка 11
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flowmeter parts are free from any
foreign matter, reassemble.
NOTE: Always ensure that a sup-
port vane is installed between the
indention marks on the body.
Upon completion, verify the rotor spins
freely, reinstall the turbine flowmeter
into the process line.
If there are no signs of particulates or
any other foreign matter obstructing
the rotor, try blowing into the turbine
flowmeter. If the rotor does not spin
freely, insert a thin screwdriver or
similar tool, gently so as not to dam-
age any of the rotor blades, and turn
the rotor.
There may be another cause for the
rotor to drag or stop, incorrect bearing
material used for the application. For
example, noncompatibility of the bear-
ing material with the process liquid,
bearing material may not withstand
the temperature of the application, etc.
When there is uncertainty with respect
to the selection of bearing material
for a given application, contact GPI.
Before installing a new replacement
kit, inspect the turbine flowmeter body
for wear and damage. By placing your
finger inside the turbine flowmeter
body, feel for any signs of wear such
as grooves, ridges, irregular spots. If
such signs are evident, it is a strong
possibility that the turbine flowmeter
body is damaged and the installa-
tion of a new replacement kit is NOT
recommended.
When a new replacement kit is
installed inside a damaged turbine
flowmeter body, the internals will be
ruined after a short period of operation
and will have to be discarded. In the
event it is uncertain whether or not the
turbine flowmeter body is functional,
it should be sent to GPI so the I.D.
dimension of the turbine flowmeter
body bore can be checked. If it is
found to be within tolerance, a new
set of internals will be installed. This
921977-01C
will eliminate the possibility of using
and/or discarding a turbine flowmeter
which shows signs of wear.
NOTE: A good turbine flowmeter body
should have a smooth inner bore
free of wear signs.
If it is determined the turbine flowmeter
body is in good condition, install a
new replacement kit and reinstall the
turbine flowmeter into the process line.
Checking the Cable
Assembly
This can be accomplished with the aid
of a frequency oscillator. Simply plug
the cable assembly with the mating
connector end that is located at the
turbine flowmeter into the frequency
oscillator. The frequency oscillator
will simulate the output of a turbine
flowmeter. If an output is displayed
on the electronic readout device, then
the cable assembly is good.
In the event an output is not displayed,
disconnect the frequency oscillator
from the cable assembly and connect
the cable supplied with the frequency
oscillator directly to the electronic
readout device, the same as you
would a turbine flowmeter cable as-
sembly. Refer to Figure 8.
Figure 8
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