Ametek Land 4750-PM, Руководство пользователя

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User Guide 5 - 16
Particulate Measurement System 4750-PM
5) Referring to Fig. 5-5, attach the MAU to the sensor body as shown:
a) Insert the appropriate tube in the opening on the rear of the MAU
backplate.
b) Align the guide holes and screw plug holes, then attach the
backplate and secure with the 2 off screw plugs at the top and
bottom.
6) Record the DUST reading. The single-value MAU has its base value
marked on it. The reading on the sensor display should match the MAU’s
base value.
7) When done, remove the MAU block and blanking tube from the sensor
and place them in the carry case to keep them clean.
8) Check that the sensor parts are free from contamination. If fitted, rotate
the flue gas blocker to open the port, then close and secure the sensor
body with the quick-release clamp.
The sensor should now return to normal operation with the display
showing the current dust level in the stack.
9) Switch OFF the Audit mode [ AUd ] to re-enable the compensation
checks and the calibration.
NOTES
(i) The Audit mode does not affect the physical performance of
the instrument; it is necessary to allow the instrument reading
to be compared to the audit filter value.
(ii) If available, the Purge Air Flow check runs continuously.
(iii) The MAU should be kept clean, dry, and safe at all times. It
should be returned to AMETEK Land annually for calibration.