Installing into Process
Steps 1 … 8 steps refer to illustrations 1 … 8 in the beginning of the document.
The following tools are required when installing:
• Adjustable wrench (or a similar suitable tool) for turning the tightening nut
• Connection box key (provided)
• Input and output cables for wiring
• Cable glands and plugs for unused lead-throughs (as required in your
application)
• Small slotted screwdriver for screw terminals
• PTFE tape (wide) for the probe threads
Before starting the installation, make sure that your installation
site matches the Ex classification of MGP261 and the requirements listed in
Using MGP261 in Hazardous Locations (page 6)
WARNING!
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
): for lead-through dimensions, see the probe parts illustration.
• 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.
2. Apply PTFE tape on the probe threads.
• Inspect the threads and remove any possible dirt. Note that the edges may be sharp.
• 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 first thread or leave loose tape hanging.
3. Insert the probe into the 1.5" female NPT installation port and rotate it clockwise until it
sits firmly in the port. Do not tighten the probe to full tightness, only enough to keep it
securely in place when wiring.
The correct thread type in which to install MGP261 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 a 1.5" NPT thread gauge.
CAUTION!
Rotating the probe open after it has been installed into the
port can tear the PTFE tape. Only adjust the position of the probe in the
installation port by tightening.
CAUTION!
13
ENGLISH
Содержание MGP261
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