Vaisala MGP261, Руководство пользователя

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9.2 Removing Probe from Process
When installed in situ, the surface of the probe is in direct
contact with the biogas process. Bacteria, viruses, or fungi can be carried from
the process on the probe surface.
• Always wear appropriate personal protective equipment when handling
items that have been in contact with the biogas process. Follow local
regulations and site-specific guidelines.
• Ensure the area where you place the probe after removing it from the
process is suitable for working with items that have been in contact with the
biogas process.
WARNING!
While installing or uninstalling the device, there is a risk of
flammable gas release or flame entrance.
WARNING!
Exposure to hazardous gases (for example, hydrogen sulfide
(H
2
S)) is possible when installing or removing MGP261 from the process.
• Always follow local safety guidelines. Ensure that the work area is safe and
meets local regulations (for example, related to ventilation and personal
protective equipment).
• Use a personal gas detector to monitor the safety of the area you are
working in.
• After installing or removing the probe, use a gas detector to ensure that
process connections are leak-free.
WARNING!
1. Prepare an area where you can place the probe after removing it from the process.
a. Clear other items and equipment away from the area.
b. Cover surfaces around the area with protective material as necessary.
2. Switch off the probe power supply input.
3. If necessary, open the connection box and remove the wiring cables. See
Inserting Probe
into Process and Opening Connection Box (page 27) .
a. Hold the probe in place by gripping the tightening nut with a wrench. Then open the
connection box by turning the cover counter-clockwise with the connection box key.
b. Loosen the cable glands and pull the connection box open.
c. Open the screw terminals inside the connection box with a small screwdriver and
remove the wiring cables.
d. Close the connection box.
Chapter 9 – Maintenance
59