Maintenance
StamoLys CA 71FE
32
Hauser
7.3
Replacing pump hoses
#
Warning!
When removing hoses from the hose nozzles, beware of reagent splashing. For this
reason, wear protective gloves and goggles.
The peristaltic pumps used for the analyzer convey the medium in a combination of
vacuum and displacement pump. The pump rate is dependent on the elasticity of the
pump hoses. Elasticity decreases as mechanical stress increases and the pump rate
drops. Wear depends on mechanical stress (measuring interval, pump starting
pressure). Up to a certain degree, the wear-effect can be compensated by calibration.
If the impairment in elasticity is too great, the pump rate is no longer reproducible and
this leads to incorrect measurements. This is why it is necessary to replace the hoses.
To replace the hoses proceed as follows:
1.
Flush the old hoses with water first and then empty them (see SERVICE).
2.
Remove the hoses from the connecting nipples on the pump(s).
3.
Remove the reagent hoses from the reagent canisters, in order to prevent
contamination of the reagents.
4.
Loosen the hose cassette. Now you can remove the hoses.
5.
Replace the new pump hoses in the reverse sequence of operations. Do not forget
to reconnect the reagent hoses to the canister.
6.
After installation, refill the hoses with sample, standard or cleaning agent (SERVICE
menu).
7.
Carry out a calibration (PARAMETER ENTRY menu).
"
Caution!
Ensure that you connect the new pump hoses to the correct connections at theT-
connector.
For the order numbers of the pump hoses see chapter "Trouble-shooting"/"Spare parts".
7.4
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 feeler on the valve and disconnect
the hoses.
3.
Replace the new pump hoses in the reverse sequence of operations.
Ensure that the hoses are connected correctly (
4.
After installation, refill the hoses with sample, standard or cleaning agent
(SERVICE).
5.
Carry out a calibration (PARAMETER ENTRY).
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