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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