Fuji Electric ZSS-8 Series, Instruction Manual

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INZ-TN8ZSS-E
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4.11 Light intensity adjustment
Note that if you loosen multiple bolts and nuts at a time, it takes considerable time to re-adjust the angle.
4.11.1 When an optional optical axis adjusting tool (laser
pointer) is used
(1) Connect the digital voltmeter using the BNC cable, referring to “4.6 Received light ”.
(2) The reference light intensity is based on the output in zero calibration or voltage value of light intensity
which is described in a nameplate.
If the output is not as much as that measured at the time of calibration before the adjustment, find a po-
sition where the received light intensity increases, moving the transmitter box from side to side and up
and down slowly. (*1)(*2)(*3)
(3) If the output voltage is less than the value obtained during a zero calibration despite your adjustment of
the transmitter box to make the output maximum, fix the transmitter box and then move the receiver
box to adjust the optical axis.
Do not loosen more than one bolt or loosen fixing bolt and nut widely in both cases of adjustment.
Light axis may deflect again.
(4) Retighten all volts to fix them (If the light intensity decreases at retightening, adjust again).
*1) Received light intensity might not increase to its maximum that was confirmed by “4.6 Received light ”
due to the influences from dust and moisture in the stack.
*2) When using the high-speed/AGC version (i.e. the 22th digit of code symbols is "H"), adjust the light axis
under the status that the level of AGC is "01" (refer to "5.3 Outline of screen ").
*3) When using CO + O
2
analyzer, check the received light intensity at two points, and then adjust them to
be maximum.
Carry out the adjustment of the O
2
analyzer first and the CO analyzer next because it is easier than the
reverse way.
e.g.) In the case that the light intensity increases when the
whole transmitter box is moved upward.
→
As the light intensity increases when the light axis turns
downward, tighten the fixing bolt in reference to “4.7.2
How to use the angle adjustment unit 2”.