SF
6
-Aciditor
22
6.6 Exchange of the sensor
The SO
2
-sensor installed inside the SF
6
-Aciditor has a recommended lifetime of two years to
guarantee a correct reading. The lifetime counter on the bottom of the screen reminds the
operator when to replace it. The exchange the SO
2
-sensor is described in detail below.
1. Assure that the SF
6
-Aciditor is turned off.
2. Loosen the marked screws on the back
panel of the SF
6
-Aciditor and turn down the
partial back panel.
3. Loosen the screw of the adapter (red
marked) and remove the adapter from the
sensor. Turn the sensor until the sensor is
out of the thread of the backplane.
4. Open the foil sealing of the new SO
2
-
sensor and take out the sensor.
5. Insert the winding of the SO
2
-sensor into
the indicated thread of the back plane (red
marked in the picture) and turn it right while
pressing it lightly.
Information!
Using the SO
2
-sensor for more than two years is not recommended due to the
excessive signal degradation (<2% per month).
