Servomex 07931001B, Operator'S Manual

Page: 170 / 221

156
© Servomex Group Limited. 2020 07931001B revision 6
When the Mechanical installation check list is complete, switch on the power.
To confirm the TU and RU are working correctly:
•
Check the laser LED light on the transmitter and receiver front panels are
ON
•
Check the transmitter unit display is working
Alignment for optimum measurement
Note: The Laser 3 Plus is factory calibrated however Servomex recommend the
Analyzer is locally calibrated before installation.
The transmission optimization process is an iterative process required to be
completed when the unit is in-situ and should be completed before final
measurement commissioning steps and software configuration.
Item Section Checked
Physical Alignment
7.3.2
Alignment of the TU (Laser gain adjustment process)
7.7.2
Receiver unit alignment
7.7.2
Table 7-4: Alignment check list
Before the Analyzer can be used it must be set up and the laser adjusted and
aligned correctly so that the receiver diode is receiving the optimum laser intensity
The following steps describe the process.
Note: Servomex recommend saving current settings before starting the gain
adjustment.
The physical alignment of the ‘ball joint’ flange will need to be adjusted to
ensure the
output is within this range.
Step 1 Peel back the boot on the transmitter mounting assembly to show the ball-
joint alignment screws Figure 7-24
Step 2 Adjust the 4x screws to change alignment until maximum Photodiode DC
voltage achieved.
Note: Only small adjustments should be made (half turn maximum per iteration).
Step 3 If signal greater than 1.5 V, Lower Gain 1 or Gain 2 and note new level of
signal.