AMI Trides
Maintenance
A-96.250.111 / 211019 55
6.9. Longer Stop of Operation
Do not switch the instrument off if your operation is suspended for
less than a week. Power consumption is very low, and the sensors
remain ready for use.
If water hardness is very high, calcium may precipitate.
1 Close sample flow regulating valve first.
2 Stop the sample flow at the main tap before the sample inlet.
3 Wait until the rotor has stopped turning and no disinfectant is
displayed any more.
4 Switch off power of the instrument and of all other connected
devices.
5 Open the grab sample tap to empty the flow cell.
6 Unscrew and remove the filter vessel from the flow cell block,
empty and dry it, then screw it onto the flow cell block again.
7 If installed, remove the pH/Redox electrode from the constant
head, fill 3-molar KCl (if not available, water) in the protective
cap and put it on the electrode tip.
8 Loosen the connector from the pH/Redox electrode and put the
connector cap on the electrode plug. Store it dry and frost pro-
tected with tip pointing downwards.
9 Remove the reference electrode from the flow cell block, fill wa-
ter in the protective cap and put the protective cap on the elec-
trode tip.
10 Loosen the connector from the reference electrode and put the
connector cap on the pH electrode plug. Store it dry and frost
protected with tip pointing downwards.
11 Remove the BNC connector from the Trides sensor.
12 Unscrew and remove one of the two knurled nuts.
13 Hold the Trides sensor with one hand while unscrewing and re-
moving the 2
nd
knurled nut.
14 Remove the Trides sensor from the flow cell.
15 Dry it with a soft, clean tissue, and store dry.
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