MIP LM 3086 SE/EPA3 manual, rev2
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16.10.2018
Page 54 / 105
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noise. The opacity and dust monitor will adjust for laser degradation, but has no lamp adjustment like
other opacity and dust monitors. The adjustment procedure is covered in the next sections.
3.
For a fresh tube replacement only:
After a stable Z reading is obtained, open the door to the board
where the audit button is located. There are two blue pots (amplifier pots), side by side that need to
be adjusted. DO NOT ADJUST ANY SEALED POTS!! While watching the hand-held (or the controller
values via a second person on a radio) observe the M and R values. These values should ideally be
9800 (+-50). If they are not, turn the left pot to adjust M, the right pot for R. Try to get the M and R
values as close as possible (+-50) to each other, and as close to 9800 as possible. Higher than 9800 is
not better, and neither is less than 9800. There is some settling after adjusting the pots. Adjust the
pots, and wait a few minutes to get an accurate reading
When all steps are complete, re-tighten the zero pipe setscrew.
The next section will cover the Clear Stack Portion.
5.3.5
CLEAR STACK PROCEDURE
This procedure assumes that all of the previous steps have been performed.
1.
After obtaining both a stable Z value, and adjusting the M and R to 9800 (+- 50), from the service
value menu where the M, R, Z, C values are displayed (9800 reading is only for fresh tubes, used
tubes will be less), back out by pushing status check once.
2.
Answer no to Service Mode Yes/No, next answer yes to This is Zero. Enter the 3723 password to This
is Zero (understanding completely the implications in the manual). New Zero Opacity = XX appears.
Push the down arrow twice to enter zero. Push status check to back out to This is Zero Yes/No.
3.
Do this next part quickly:
Push next to get to the Service Mode Yes/No, Answer Yes, you will see the
four service numbers and push down four times to Hardware Tests? Yes/No. Push and hold Next for 5
seconds until Hardware Copy appears. Select Copy. DO NO SELECT CALC. Back out using Status Check
to the main display where you see the opacity instantaneous and average readings.
4.
Push Status Chec
k, quickly while the status displays No More Faults (Assuming there aren’t any), push
the next button. Request Buffer will appear, displaying four values Z, W, H, G fairly quickly. You may
have to repeat this to view the numbers properly. Verify that the numbers following Z and H are the
same (Usually around 1000 +-). If your laser has been is service for some time, the 1000 value will be
much less due to laser degradation. If the numbers are not the same, re-check the Z stability from the
service menu, re-do this is zero, and also the Hardware copy. The Z and H values on the Buffer
requests display should be the same (NOVARIATION).
5.3.5.1
Explanation of the Buffer Values:
The Z buffer refers to the current zero of the instrument. This number will shift within 10-25 units as the unit
calibrates, and drifts a little.
The W value refers to the current window value. For example:
0010 = 1 % and 0001 = 0.1 %
The H value is a value that was established when the Hardware copy was performed. This is the set point the
opacity instrument uses to gauge a clear stack from. This number is a critical number, since all opacity
calibrations are made in reference to this value, using it as a baseline. If the instrument drifts drastically, a
dirty stack zero will set the Z value, to the known, unchanging (unless you redo the hardware copy) H value. It