ENSIM SENSORS ISS 04 Operating Manual page 9

2.8. Cutting the Electrode Rods
After Le1, Le2, Le3 and Le4 values have been defined, cut the rods by any available cutting tool.
Crimp the PTFE insulator approx 50mm from the bottom of the rod using a pipecutter or a plier.
30~50
Blanked length of the tip must not be shorter then 30mm!
The length of the blanked portion affects the sensitivity directly. If the conductivity of the water is near a few thousand mikroS/cm then
it can be said that blanked tip of 30mm is enough.
Figure 13
2.9. Electrical Instulation
Make the electrical connection of the instrument according to details on its label , table and cable figures in this manuel.
Contact positions with no power applied:
Power
Terminal 2 is the “neutral” and the terminal 3 is the “Live” of the power connection (mains). A 2A thermic – or thermic + magnetic – breaker
suits the protection needs.
The position of contacts do not change if power applied at Configuration-I while all tips are exposed but relay-1, 2 or 3 is activated
on all other configurations.
The diagrams are given for general usage according to configurations at the following pages.
Figure 12
Two cutting examples are shown on the left.
Figure13: For Configurations F2 and F4.
Figure14: For Configurations F3.
Try to deburr the tips using any grinding tool or sandpaper if available.
Figure 14
The terminal number “1” is assigned to earth fictively and therefore not shown.
In fact the ground terminal of electrod is connected
to the body of the boiler and “earted” anyway
Figure 15
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