Parts Description & Replacement Parts List
Scale Changing Instructions
19
Scale Changing Instructions
1.
Remove clear front shield (20) by removing four screws (18) securing it to flowmeter body.
2.
Position scale (14) with desired units, GPH or ML/MIN, facing upward.
3.
Align zero mark on scale (14) with zero mark on flow tube (9).
4.
Using a 3/16-inch hex wrench, loosen the cylinder screw (21) at the top of the flowmeter, approximately 1 to 2
turns.
5.
Rotate the flow tube (9) so scale numbers do not appear in viewing window.
6.
Using a 3/16-inch hex wrench, tighten the cylinder screw (21) to secure the flow tube (9) in its new position.
7.
Reinstall clear front shield (20) with notch towards valve (15) and countersink holes facing up, align holes, and
secure with four screws (18). Torque to 2.5 - 3 in-lbs.
Variable Area Flow Meter
Variable Area flow meters are used to measure flow rate of liquids and gases. The meters consist of a spherical
float moving vertically in a glass tube with a tapered inside diameter and a valve. As the valve is unscrewed
(counterclockwise), flow through the tube increases allowing the float to rise in the tube. A scale marked on the
tube is used to obtain an accurate measurement of flow rate.
The recommendation from Veeder-Root regarding the use and maintenance of the FX Tester is that this equipment
should be periodically compared against standards which are traceable to the National Institute of Standards and
Technology (NIST) or other recognized national metrology institutes, or compared to nationally or internationally
recognized consensus standards. The frequency of this comparison will vary with use and conditions to which the
tester has been subjected and is the responsibility of the owner.
Cleaning the Flow Meter
Refer to Figure 8 for disassembly and assembly.
TO DISASSEMBLE
1.
Remove clear front shield (20) and scale (14) by removing the four screws (18) securing it to the flowmeter
body.
2.
Remove two mounting nuts (4) and rear white plastic shield (17).
3.
To free the flow tube (9), turn the locking screw (21) on the top of upper block (1) counter-clockwise using a
3/16-inch hex wrench.
4.
Remove the flow tube (9), stops (6 & 11), two upper o-rings (5 & 7), two lower o-rings (5 & 10), and the float
(8).
If only cleaning of the stops, float, and tube is required, refer to Cleaning. If complete disassem-
bly is required, continue to step 5.
5.
Remove eight screws (18) securing side plates (19) to upper and lower blocks (1 & 13).
6.
Remove connector (3) with o-ring (2) from upper block (1) using 1/2-inch wrench.
7.
Remove connector (3) with o-ring (2) and orifice (12) from lower block (13) using 1/2-inch wrench.
8.
Remove valve (15) and o-rings (2 & 22) from lower block (13) using 1/2-inch wrench.
NOTE
