Michell Instruments XZR500ST, Руководство пользователя

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XZR500 User’s Manual
Michell Instruments 9
INSTALLATION
2 INSTALLATION
2.1 General Mounting Precautions
• Place the probe as close as possible to the process (without breaching
the fl ame front).
• Prevent ambient air from entering the stack upstream or at the probe
tapping point and interfering with the measurement. Make sure all the
gaskets are placed and tightened (Figure 4), and tighten-up the SS plug
for calibration gas inlet ( Figure 4 (15)).
NOTE: The stainless steel plug - or any 1/8” sealing ferrule -
should be tightened up by hand and then tightened again using a
7/16” spanner, turning only 1/8th of a turn so as not to damage
the connection.
• Avoid placing the probe near cleaning devices or elements that create
vibrations and are liable to disturb the measurement.
• Voltage should be applied to the analyzer immediately after the instrument
is fi xed on the stack so that the furnace can start heating. This will avoid
condensation at cold points where dirt could aggregate and clog up the
probe tubes. For the same reason, we recommend leaving the analyzer
powered up 24 hours a day, 365 days a year.
• The part of the tubing situated between the stack and the probe head
should be very well insulated - or even heated. If necessary, Michell
Instruments can manufacture a complete insulating cover for the outside
part of the probe (optional).
NOTE:
Ceramic probes require special handling.
Please read the following note carefully.
Ceramic Probes:
Special care must be taken when handling ceramic probes due to their fragile
nature. Inspect the probes thoroughly before inserting into stack. If they
have been damaged in transit, contact your Michell of fi ce or distributor
immediately and inform them of the situation. Take photographic evidence
of the damage to the probe, and of the packaging, on the day of delivery.
On insertion ensure that the probe does not impact with the side of the ori fi ce.
Once installed, it is not recommended to remove the probe. If removal is
unavoidable due to maintenance, then allow the probe several hours to fully
cool to ambient temperature and extract slowly.
Consideration for placement of the probe is essential. Avoid the fl ame front,
violently turbulent sections of the duct/ fl ue, proximity to dampers, or where
falling refractory could strike the probe. Excessive vibrations must be avoided
as ceramic is a brittle material.
Incorrect handling or placement of the probe will invalidate the warranty.