Yokogawa In-Situ Gas Analyzer TDLS200 - Manual (Page 85)

6-28 6-29
IM 11Y01B01-01E-A 6th Edition :Feb 13, 2013-00
<6. BASIC OPERATION>
4. [Optional] For a high-process-temperature application and if the current process temperature is higher than 600°C,
apply a multi-meter to measure the voltage across R21. If the measured voltage absolute value is greater than 5V,
change R21 to the 100Ω resistor from the resistor bag. Keep the original R21 in the resistor bag as it can be used
for future offline calibration.
5. Remove R22 and R23 from the detector board and replace them with the 11kΩ resistors from the resistor bag.
Please keep the original R22 and R23 in the resistor bag as they can be used for future offline calibration.
6. Optimize the analyzer alignment for both the launch and detector sides. Stop the alignment if Detector Signal High
fault activates.
7. In the TruePeak user interface software, navigate to Advanced Menu (password) -> Configure -> Laser Spectra &
Control screen to check the raw detector signal. Write down the raw detector signal MAX and MIN values for later
use.
8. Change R22 and R23 accordingly based on the current raw detector signal. Perform one item of the following
selections (a, b, or c).
a. If Detector Signal High fault is active, change both R22 and R23 to the next smaller value available in the resistor
bag, and then go back to
STEP 6. For example, if the current R22 and R23 values are 11kΩ, the new R22 and R23
values should be 7.5kΩ. NOTE: please access Active Alarm in the main user interface panel to check if Detector
Signal High fault is active.
b. If the raw detector signal is within requirement, remove R22 and R23 (and R21 if it was changed to 100Ω in STEP
3) and cut their leads properly to fit the sockets tight and low, and then go to STEP 9. NOTE: (1) for a low-process-
temperature analyzer (with no capacitor on R3), the raw detector signal is within requirement if MAX is between
0.0 and 4.0; (2) for a high-process-temperature analyzer (with a capacitor on R3), the raw detector signal is within
requirement if MIN is between -4.0 and -8.5.
c. If the raw detector signal is too low (other than a and b), change either R22 or R23 to the next greater value
available in the resistor bag, and then go back to STEP 7. How to decide which resistor to change:
i. If the current R22 value is greater than the current R23 value, change R23 to the next greater value available
in the resistor bag.
ii. If the current R22 value is same as the current R23 value, change R22 to the next greater value available in
the resistor bag.
iii. If the current R22 and R23 are already 24kΩ (the greatest value available in the resistor bag), please
contact Yokogawa for assistance.