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The testo 300 I can also be fitted with an SO
instead of the NO measuring cell.
The following combinations are possible:
- O
/ CO
2
- O
/ CO / NO
2
- O
/ CO / SO
2
2
The combination O
/ NO / SO
2
Notes on SO2 measurement
Please note the following with regard to the high absorption of SO
1. Only use the special, patented hose between probe and analyser
(only for short-term measurements up to 10 minutes, afterwards
place dry filters in the condensate trap).
2. It is recommended to use the compact gas drier instead of the
condensate trap for highly accurate measurements or long-term
measurements lasting up to several hours.
3. Since flue gases containing SO
of an outer pipe with filter is also recommended in order to prevent
deposits in the hose.
4. High NO
levels (>10 ppm) in flue gas influence SO
2
(-110% cross-sensitivity that means add 110% NO
SO
display).
2
Using the NO or SO
Only use NO module or SO
Procedure:
1. Measurement with NO cell
2. Switch off instrument and replace NO module with SO
Chapter on changing measuring cells).
3. Switch on analyser and select SO
menu.
Please note:
Prior to being first used install the SO
0554.3923) to release the SO
analyser.
19
Measurement example
SO
measurement module
2
is not possible due to technical reasons.
2
usually also contain dust, the use of
2
module in one analyser
2
module. Simultaneous use is not possible.
2
module in the "Display sequence"
2
upgrade module (Item no.
2
measurement channel in the
2
measurement
2
gas:
2
measurement
2
display to the
2
module (see
2
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