User's Manual AXF Magnetic Flowmeter Integral ... - Yokogawa
User's Manual AXF Magnetic Flowmeter Integral ... - Yokogawa
User's Manual AXF Magnetic Flowmeter Integral ... - Yokogawa
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5. MAINTENANCE<br />
5.2.3 Installing Replaceable Electrodes<br />
(2) Using end A of the tool, tighten the electrode<br />
holder.<br />
NOTE<br />
It is recommended to replace the O-ring when<br />
reinstalling the replaceable electrode. Use the O-<br />
ring specified by <strong>Yokogawa</strong> (G9303SE: material<br />
is fluororubber).<br />
NOTE<br />
Precautions for storage of O-rings:<br />
• Keep them in a cool, dark place.<br />
• Wrap them well.<br />
• Do not use O-rings after one year since their<br />
purchase.<br />
Torque driver<br />
NOTE<br />
F0511.EPS<br />
(1) Push the electrode holder with end B of the tool<br />
screwed into it, straight into the flowtube.<br />
Electrode lead wire:<br />
Red: Electrode A<br />
White: Electrode B<br />
Electrode holder:<br />
(Electrode A is engraved with "A"<br />
and electrode B has no markings.)<br />
Using the torque wrench or torque driver, tighten<br />
the electrode holder to the following torque<br />
values:<br />
PFA lining:<br />
8.0 N·m ±1 N·m (80 kgf·cm ±10 kgf·cm)<br />
Polyurethane rubber lining:<br />
3.0 N·m ±0.5 N·m (30 kgf·cm ±5 kgf·cm)<br />
WARNING<br />
If the electrode holder was not tightened to its<br />
specified torque value, fluid leakage from the<br />
electrode may result. Should fluid spill over the<br />
electrode block, wipe it dry and check that the<br />
O-ring has not come off.<br />
F0510.EPS<br />
NOTE<br />
• Check that the O-ring has not come off.<br />
• Do not interchange electrodes A and B when<br />
installing them. Install electrode A to the<br />
electrode boss with the red lead wire and<br />
electrode B to the one with the white lead wire.<br />
(3) Fill the interior of the flowtube with the fluid and<br />
check that there is no leakage from the electrode.<br />
(4) Hold down the lead wire and terminal lug and<br />
screw the mounting screw into the electrode using<br />
the Phillips screwdriver.<br />
Electrode mounting screw<br />
F0512.EPS<br />
5-4<br />
IM 01E20D01-01E