Vaisala MGP261, Installation And Safety Manual

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Recommended Installation Position on Pipeline
Figure 3 (page 11) shows the recommended installation position for MGP261. Install the probe
in a straight run of pipeline,
≥
5 pipe diameters downstream of the closest bend or other
feature affecting gas flow, and ≥ 2 pipe diameters upstream to the next bend or similar feature.
For best results, use the orientation and installation depth shown in Figure 2 (page 10) .
≥
5
ø
≥
2
ø
1
Figure 3 Recommended MGP261 Installation Position on Pipeline
1 Recommended MGP261 installation position on pipeline.
Gas Safety During Installation
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 installation, use a gas detector to ensure that process connections are
leak-free.
WARNING!
To avoid compromising the leak tightness of the installation:
• Ensure that the thread type of the installation port is 1.5" female NPT. If
unsure, verify the thread type with a 1.5" NPT thread gauge.
• Apply PTFE tape to the 1.5" male NPT thread of MGP261 as instructed in
Installing into Process (page 13) , and make sure that the PTFE tape seal has
not been damaged by rotating the probe open (counter-clockwise) in the
installation port.
CAUTION!
11
ENGLISH