Long-Term Flue Gas Analysis Using The Control Unit - testo 350 S Kurzanleitung

38 6. Measurement examples

6.2 Long-term flue gas analysis using the Control Unit

6.2.1 Operation on the basis of a sample measurement task
For long-term analysis, the gas sensors need fresh air phases to regenerate.
Long-term measurement with cycles of 10 min. measurement, 5 min. rinsing with fresh
air, values stored every 15 seconds.
Readings can only be saved where the corresponding measurement probe is
inserted!
6.2.2 Programming the instrument
It is not possible to carry out settings on the instrument if the program is activated.
Enter values as per measurement job:
Memory Program
1 –>
Starting criteria:
· Manual:
On a keystroke in the measuring menu (function key
· Date/Time:
Beginning of measurement at the selected date/selected time.
· Trigger:
The trigger input can be used as a criterion to either start or stop measuring
programs:
· The measuring program is started and stopped with a rising edge.
· The measuring program is started and stopped with a falling edge.
· With level-dependent trigger signals, the data recording proceeds at the adjusted
measuring rate as long as the trigger signal is active.
2 Enter start criterion.
3 Confirm with .
- The program automatically goes to mean calculation:
yes
· With mean value
· Mean of mean values:
The analyser saves a mean of all mean values. It is identified by a * when the
measurement data is called up out of the memory.
4 Enter measurement rate.
- The program goes automatically to selecting the end criteria:
· Memory full
· No. of values
· Date/Time
5 Insert values and confirm with
- The program goes automatically to selecting the gas time cycle (=flue gas
measurement).
6 Enter gas time and confirm.
The pump is stopped when a threshold concentration is reached (e.g. O
Reason: Lower wear and power consumption.
- Program goes automatically to selecting the rinse time cycle.
7 Enter rinse time and confirm.
START
–> –>
only mean values will be saved.
End
.
–>
START
).
> 20.5 %).
2