Teledyne T200 User Manual page 105

PART 2: DETERMINE THE AMOUNT OF NO OUTGASSED BY THE NO2 à NO
CONVERTER.
3. Bypass the NO2 à NO converter by placing a short piece of tubing in the gas stream in
place of the converter.
4. Perform a straight dilution with 450 ppb NO gas & air as a diluent gas.
5. Input the NO gas into the analyzer.
6. Allow the machine to stabilize & write down the NOx value on line 2 of GPT data sheet
(Section 4.5.1.1).
7. Remove the converter bypass so that the NO gas is flowing through the NO2 à NO
converter
8. Allow the machine to stabilize.
9. Write down your NOx value on your data sheet on lines 3 AND line 5 of the GPT data sheet.
10. 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
Older NO
•
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.
11. Generate the same 450 ppb NO gas & input 400 ppb of O
ppb NO
12. Allow the instrument to stabilize for 10 minutes.
13. Write down the NOx value on line 6 & the NO value on line 9.
14. Subtract line 6 from line 5 & put that onto line 7.
15. Subtract line 8 from line 7 & put that onto line 10.
16. 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.
17. Divide A by B & multiply it by 100.
18. Write this value it into the blank next to letter C on lines 11 and 12.
19. Subtract that value from 100 & write it in the blank next to the letter D on line 12.
20. This is the converter efficiency.
• This value should be >96%.
083730200A DCN7962
à NO converters might outgas a bit more NO, therefore a slightly wider
2
, if that's what your calibrator says).
2
Teledyne API T200 NO/NO
à NO converters.
2
(or generate 450 ppb NO & 400
3
/NO Analyzer with NumaView™ Software
2 x
103