Teledyne T200, Руководство по эксплуатации, Страница: 265 / 425

Teledyne API
– T200 NO/NO
2
/NO
X
Analyzer Operation Manual Troubleshooting & Service
263
PART 1: PREPARATION
1. Leak check machine to ensure that there are no leaks in the analyzer.
2. Calibrate the instrument at the same NO span gas value as being used in this
method.

For this example 450 ppb NO span gas
3. If you have input a converter efficiency (CE) factor into the instrument firmware (see
Section 12.7.10.3) other than 100%, change this back to 100% for the duration of
this test. (CAL>CONC>CONV>SET).
PART 2: DETERMINE THE AMOUNT OF NO OUTGASSED BY THE NO2

NO
CONVERTER.
4. Bypass the NO2  NO converter by placing a short piece of tubing in the gas
stream in place of the converter.
5. Perform a straight dilution with 445 ppb NO gas & air as a diluent gas.
6. Input the NO gas into the analyzer.
7. Allow the machine to stabilize & write down the NOx value on line 2 of GPT data
sheet (Section 12.7.11.1).
8. Remove the converter bypass so that the NO gas is flowing through the NO2  NO
converter
9. Allow the machine to stabilize.
10. Write down your NOx value on your data sheet on lines 3 AND line 5 of the GPT
data sheet.
11. Subtract line 2 from line 3 & write that number down on line 4. Also write the NO
value on line 8 of the data sheet.

The specification shown on the data sheet is the value that is used by Teledyne
API when performing the procedure on new NO
2
 NO converters.

Older NO
2
 NO converters might outgas a bit more NO, therefore a slightly
wider specification might be in order.

If this value is a constant or changes only slightly over time, this is not a
problem the machine will calibrate this out.
PART 3: PERFORM THE SIMPLIFIED GPT CALCULATION.
12. Generate the same 450 ppb NO gas & input 400 ppb of O3 (or generate 450 ppb
NO & 400 ppb NO2, if that’s what your calibrator says).
13. Allow the instrument to stabilize for 10 minutes.
14. Write down the NOx value on line 6 & the NO value on line 9.
15. Subtract line 6 from line 6 & put that onto line 7.
16. Subtract line 8 from line 7 & put that onto line 10.
17. Write the number from line 7 into the blank next to letter A on line 11 & put the
number from line 10 into the blank next to letter B on line 11.
18. Divide A by B & multiply it by 100.
19. Write this value it into the blank next to letter C on lines 11 and 12.
20. Subtract that value from 100 & write it in the blank next to the letter D on line 12.
21. This is the converter efficiency.

This value should be >96%.
06858E DCN7057