Ametek Land 4500 MKIII, Руководство пользователя

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B - 23
Model 4500 MkIII Opacity and Dust Monitor
User Guide
B5.3 Recalibration (Also known as Zero Alignment or Clear Stack
Calibration)
A Recalibration must only be performed when there is no smoke or dust in
the beam of the opacity monitor. To comply with US EPA Procedure 3, the
instrument must be removed and attached to test stands for calibration.
Using the Calibration Stand Kit (Land Part Nº 809807)
1) Undo the clips from the transceiver and retro-reflector purges. Remove
them and take them to a clean workshop.
2) Mount the transceiver and retro-reflector into a stand calibration stand.
Use the clips to secure each unit into its stand.
3) Determine the correct spacing for the stands. The distance between
the stands should be equal to the installation pathlength given on the
Manufacturer’s Certificate of Conformity (MCOC) plus 252 mm (9.9 in).
4) Connect the power supply to the transceiver.
5) Align the transceiver and the retro-reflector using the alignment targets.
You will need to remove the retro element to see the green spot on the
target (Refer to Section B4.3 and B4.4 of this User Guide).
6) Go to the Calibration menu (password is 10 ) and do a recalibration (See
Section 5.4 below).
B5.4 Recalibration procedure
Ensure that the pathlength is correct and that the surfaces of the main lens
and retro-reflector elements are clean and dust free. Align the instrument as
described in B 1.4 paragraph 3.
1)
Press
2) Unlock is displayed, press
3) Use the and arrows until the Supervisor code (Default: 10) is
displayed and press
4) Use the and arrows to select Calibrate and press
5) Use the and arrows to select Recalibrate and press
6) Start is displayed. When ready, press
7) Confirm clear path is displayed. Check that the optical path is clear
and that the opacity reading is stable. Press
The hourglass is displayed while the instrument waits an additional
10 seconds for the readings to settle.
8)
Confirm blocked path
is displayed. The simplest way to achieve a
blocked path is to release the clips on the side of the Transceiver and
swing it open on its hinges until the beam is pointing into free space.
Alternatively, to calibrate the instrument at an opacity other than 100%,
insert a filter into the slot in the calibration unit, close the Transceiver
on its hinges and apply the clips.