Caution – electrostatic sensitive – Yokogawa In-Situ Gas Analyzer TDLS200 User Manual
Page 36
36
IM11Y01B01-12E-A
1st Edition
Adjustment of Detector Gain after Optimization of Alignment –
Please read these directions carefully before attempting work and contact your local Yokogawa
service center if there is any doubt about how to perform this procedure.
Alternatively, Yokogawa service personnel can perform this procedure – please contact you local
service center for details, rates, availability, etc.
Caution – Electrostatic Sensitive!
INTRODUCTION
•
For TDLS200 measurement over long optical path length, the laser beam is usually configured with
a small diverging angle (either with or without large aperture detector lens). In factory, the detector
signal gain is not optimized for the real installation. During the analyzer field start up service, the
detector gain needs to be adjusted to achieve the best analyzer performance.
•
This document gives the guidance and procedures to adjust the detector board gain for services
and customers after the analyzer is installed and powered up.
•
This operation should be done by qualified personnel. Read instructions fully before starting this
operation. Any doubts or questions, please contact Yokogawa.
PHOTOS OF DETECTOR BOARD
RESISTOR KIT BAG
•
For a TDLS200 analyzer with diverging laser beam configuration (either with or without large
aperture detector lens), a resistor bag is attached inside the detector box. The resistor bag contains
the resistors with the following values. All of them are ¼ W, 5% tolerance metal film through-hole
resistors.
Resistor Bag for Analyzers With Diverging Beam Optics
Resistance (Ω)
100
1k
1.5k
2.2k
3.3k
5.1k
7.5k
11k
15.8k
24.3k
Quantity
1
2
2
2
2
2
2
2
2
2
Low-temp detector board (< 600°C)
High-temp detector board (> 600°C)