Magontec CorroScout 500 Instrucciones De Uso página 28

Operating Instructions CorroScout
3. Connect CorroScout
between Mg anode and the tank by using the crocodile clamps.
Connect one of the two crocodile clamps to the Mg anode and
the other to the boiler or tank so that the circuit between anode
and tank structure is closed again.
4. Wait for approximately ½ a minute until the disturbance in the
system caused by the original connection separation has disap-
peared.
5. The actual measuring value for the protective current (mA) is
shown on the display. For values less than 20 mA, a higher reso-
lution is obtained by using the more sensitive 20 mA measuring
range of the CorroScout
6. After carrying out the measurement, restore the permanent con-
nection between the anode and the tank.
In order to test the protective current with the use of CORREX
impressed current anode systems, proceed basically as described
above. Preferably disconnect the plug connection for the titanium
anode and connect the CorroScout
circuit as described in points 3 to 5 above. The instantaneous mea-
suring value for the protective current is shown on the display. After
successful measurement restore the original connection between
anode and tank and the CORREX
Evaluating the measurement results
The actual protective current demand depends on various parameters,
such as enamel quality, size of the tank, water conductivity, water
temperature, presence or absence of brass insertion sleeves as well
as additional non-enamelled heat exchangers and operating period.
For this reason, generally applicable exact reference values for the
expected protective currents cannot be given. The following
practical observations have been made over years and serve for
orientation:
Experience has shown that the protective currents for storage
tanks from approximately 200 l to 1,000 l are between 1 mA to a
few mA.
When testing small-volume storage tanks, values less then 1 mA
are also possible. The critical lower limit of a protective current
can be seen as about 0.3 mA.
28
® 500
® 500 in series into the measuring circuit
® 500.
® 500 in series in the electrical
® potentiostat.
®