Vaisala MGP260 Series, User Manual, Page: 28 / 92

3.2 Preparing probe for installation
The following tools are required when installing:
• Adjustable wrench (or a similar suitable tool) for turning the tightening nut
• 5 mm (3/16 in) Allen key for tightening flange
• 2.5 mm (3/32 in) Allen key for strain relief clamps
• Input and output cables for wiring
• Cable glands and plugs for unused lead-throughs
• Small slotted screwdriver for screw terminals
• PTFE tape (wide) for the probe threads
M16x1.5 (1)
M20x1.5 (2)
PTFE
1. Attach cable glands (not provided by Vaisala) to the wiring lead-throughs as required.
Note the cable gland requirements listed in Guidelines for safe use in hazardous
conditions (page 17) ). For more information on lead-through options, see Lead-through
options and breather plug (page 13) .
• Use an M16x1.5 gland for the optional external sensor input wiring (Ex ia).
• Use 1 or 2 M20x1.5 glands for wiring the 4 … 20 mA analog output, power supply input
and RS-485 terminals (as required in your application).
• Seal unused lead-throughs using Ex compliant seals.
2. Apply PTFE tape on the probe threads.
• Inspect the threads and remove any possible dirt.
• Wrap 2-3 revolutions of tape in the direction of the thread spiral, starting from the
first thread. Keep the edge of tape parallel to the face of the thread while wrapping.
• Do not tape beyond the edge of the threads or leave loose tape hanging.
The correct thread type in which to install MGP260 is 1.5"
female NPT . Installing into any other thread type can damage the
equipment and compromise the leak tightness of the connection. If unsure,
verify the thread type with the NPT 1.5" thread test plug.
CAUTION!
MGP260 User Guide M212504EN-A
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