GENERAL INFORMATION
Inspect instrument for possible visible damage resulting from
shipping. Notify UPS or other carrier as well as the distributor
where the flowmeter was purchased of any claims.
Flowmeter always must be installed in a vertical position, any
significant deviation from vertical will effect the readings.
Valves should be closed before installation and opened gradually
after all connections are carefully inspected. A leak test is
highly recommended especially when hazardous fluids are
involved.
CAUTION: excessive tightening of valves may damage the
orifice.
It is important that all lines to be connected to the flowmeter
are purged of any dust or any other residual contamination prior
to installing the meter.
STICKING FLOATS
Before installing open the valve of the flowmeter and check to
make sure that the float or floats are moving freely in the
flowtube. This is best done by slowly tilting the flowmeter from
horizontal to vertical while observing if the float is rolling
freely.
Certain small bore flowtubes have a minimal clearance between
the float and the inside walls of the flowtube. In some cases
these flowtubes are found to have floats that are sluggish or
not moving due to condensation resulting from temperature
changes during shipping.
SAFETY INFORMATION
F-650 style flowmeters are designed to be operated at pressures
not exceeding 150 psig (10.3 bar), or temperatures not exceeding
250 degrees F (121 deg. C).
For hazardous fluids the flowmeter must be tested at the time of
installation in the system, prior to usage. It is also important
that a leak integrity test is performed periodically to maintain
safe operating conditions.
Flowmeters must be protected from breakage due to external
conditions such as objects bumping into or hitting the
instrument, extreme vibrations, or attack by corrosive
materials. It is the responsibility of the customer to acquaint
the operator (s) of this flowmeter with all appropriate safety
information.
OPERATING INSTRUCTIONS
Close valve (if applicable) before initial use, then pressurize
the system.
Slowly open the valve until the float is at the desired flow
rate. This flow rate is read at the center of the float.
REMOVING THE FLOWTUBE
1. Loosen the compression screw with a 5/32 hex wrench (counter
clockwise).
2. Remove the four faceplate screws, then remove the faceplate.
3. Carefully remove the flowtube. Note: Be careful not to lose
the gaskets that are located at each end of the flowtube.
FLOWTUBE CLEANING
Insert a plastic rod that will fit into the flowtube with no
obstruction, into the bottom of the flowtube and push the
retaining plugs and float out of the flowtube. Use tweezers to
handle the float and store the float and the plugs in a lint
free container. Before removing note the position of the plugs
for reference when reassembling.
Using a suitable solvent clean all the parts including the
flowtube, dry them by means of a clean stream of air or gas.
To reassemble the flowtube use the push rod to first install the
lower plug, next insert the float and then the upper plug.
Test by slowly tilting the flowtube from horizontal to vertical
to assure that the float is moving freely. If the float is free
follow the instructions above to reinstall the flowtube in the
frame.
MAINTENANCE
Under normal operating conditions no special maintenance is
required. Dirt or contamination may create problems within the
flowtube by causing a restriction in the flow passage. Such
conditions can be diagnosed by examining the flowtube. The most
obvious indication of obstructions is the float being stuck in
the flowtube. If the existence of contamination's is determined
the condition may be rectified in a number of ways. The easiest
being (if possible), to disconnect the inlet and the outlet of
the flowmeter and purge the instrument by using a clean and dry
stream of gas. The action of the float within the bore of the
flowtube very often causes particles to be dislodged through the
outlet of the flowmeter.
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