De Dietrich EA 103 Manual Del Usuario página 6

When replacing the titanium anode by a magnesium anode, connect
the TAS anode simulation connector
on the terminal normally used by the titanium anode.

Refer to the instructions supplied with the calorifier.
The magnesium anodes must be checked at least every 2, years.
After the first check, determine the frequency of future checks on the
basis of anode wear.
The anodes can be checked by two methods:
Inspection: the anode must be replaced if its diameter is
less than 15 mm (original diameter = 33 mm).
Function test:
- disconnect the earth wire from the anode
- measure the strength of the current between the tank and the
anode. if the current is less than 0.1 mA, the anode must be
replaced.
6
Electrical connection
to the boiler's control panel,

Commissionning
Maintenance

The TAS anode simulation connector is used only if the control
panel has the "TA" function.
EA 103 30/05/05 - 300000151-001-C