ABB Aztec 600 Manual page 6

Piston assembly single- and multi-stream colorimetric analyzers

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4.3 Removing a piston

IMPORTANT (NOTE)

Perform this procedure if the piston is seized.

DANGER – Serious damage to health / risk to life

Isolate the analyzer from mains power supplies before

performing this procedure.

WARNING – Bodily injury

— do not allow any fluid from the measurement cell

sample tube to come into contact with either the

skin or any metallic / electronic parts of the

analyzer. The fluid is contaminated with acid from

the reagents used in the analyzer – wipe up any

spillages immediately

– wear appropriate PPE when emptying any liquid

from the piston

Referring to Fig. 4.2:

1. Turn handle A

turn clockwise, pull the analytical

section forward and allow it to rest against its stops.

Fig. 4.2 Opening the analytical section

SI/ANAINST/001-EN | Aztec 600 | Piston assembly | Single- and multi-stream colorimetric analyzers

Referring to Fig. 4.3:

2. Disconnect the measurement cell ribbon cable B from

the connector on the back of the measurement cell.

3. Remove 4xM4 screws C and remove the measurement

cell assembly.

Fig. 4.3 Removing the measurement cell assembly

Referring to Fig. 4.4:

4. Depress catch D and remove cover E.

Fig. 4.4 Removing the measurement cell cover

Referring to Fig. 4.5,

5. Invert the measurement cell assembly, remove 4 screws

F and remove base plate G.

6. Remove sample tube end face sealing cap H and remove

seal I. Discard the seal.

7. Remove all traces of fluid from the inside of sample tube

Fig. 4.5 Removing the measurement cell base plate