TESTO 350 Maritime V2, Инструкция по эксплуатации, Страница: 61 / 106

6 Using the product
61
exist, the sensor can also be switched off manually. CxHy-Sensor
On starts the flue gas analyser with a zeroing phase (30s).
For proper functioning the sensor is heated up to approx.
500°C, duration: approx. 10min. This means that the
sensor needs to be zeroed again 10min after the device
has been switched on, in order to prevent drifting (into the
"minus" range).
Calling up the function:
>
[ ] → Sensor settings → [OK] → HC-Sensor
Switching the CxHy sensor on/off
1. [Change] .
2. Select setting: [▲] , [▼]
3. Confirm the entry: [OK]
6.1.4.3. Sensor protection
Protection limits can be set to protect the sensors against overload.
The sensor protection switch-off is available for the following
sensors: H
2
S, NO, NO
2
, CO
2
-(IR), CxHy, CO, SO
2
.
The sensor protection is activated if the threshold is exceeded, the
measuring gas is diluted. If the threshold is exceeded again, the
system will be shut down.
To deactivate sensor protection the thresholds must be set to
0ppm.
Calling up the function:
>
[ ] → Sensor settings → [OK] → Sensor protection →
[Change] .
Setting sensor protection thresholds:
1. Select parameter: [Edit]
2. Set parameter → [OK]
optional
> Reset value to the factory setting: [Default]
3. Save changes: [Finished]
6.1.4.4. Calibration / adjustment
CO, SO
2
, NO
2
, NO, O
2
, H
2
S, CxHy and CO
2
(IR) sensors can be
tested (calibrated) and adjusted using test gas.
Calibration/adjustment of the O
2
sensor (O
2
reference) is basically
carried out in the same way as the calibration/adjustment of toxic
sensors. The O
2
nominal value entered is only temporary, i.e. the
nominal value will be overwritten with the ambient oxygen content