Stamolys CA71CODcr
Maintenance
Hauser
39
4.
Pump (via SERVICE menu) until water starts dripping out of the ends of the hoses.
5.
At the adjusting screw (item 1, Allen screw, AF 2.5) reduce the contact pressure until the
water stops dripping but does not flow back into the hose.
6.
Increase the contact pressure by turning the screw 3/4 of a revolution.
7.
Reconnect the hoses to the valve manifold.
8.
Fill the hoses again with sample and reagent R2.
9.
Perform a calibration after 2-3 measurements.
7.5
Replacing valve hoses
To replace the hoses, proceed as follows:
1.
Rinse the old hoses first with water and then with air to empty them (see SERVICE).
2.
Remove the hoses from the valves:
a. You can disconnect the front hoses directly because the valves are open when de-
energised.
b. To remove the back hoses, press the black button on the valve and disconnect the hoses.
3.
Grease the new hoses with silicone grease before inserting them.
4.
Install the new valve hoses in the reverse sequence of operations.
Ensure that the hoses are connected correctly ().
5.
After installation, refill the hoses with sample or standard (SERVICE).
6.
Carry out a calibration.
a0012421
Fig. 23:
Valves and valve hoses
1
2
3
4
5
6
7
8
9
10
11
Sample
Standard (100 or 2500 mg/l O
2
)
0 mg/l O
2
standard
Sulfuric acid R1
Dichromate solution R2
From sample/acid pump P1
Inlet to sample/acid pump P1
From reagent pump P2
Inlet, reagent pump P2
Inlet, reagent to reactor
Inlet, sample/acid to reactor
