6
SI/ANAINST/001-EN
| Aztec 600 | Piston assembly | Single- and multi-stream colorimetric analyzers
4.3 Removing a piston
Referring to Fig. 4.2:
1.
Turn handle
A
1
/
4
turn clockwise, pull the analytical
section forward and allow it to rest against its stops.
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.
Referring to Fig. 4.4:
4.
Depress catch
D
and remove cover
E
.
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
J
.
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
Fig. 4.2 Opening the analytical section
Fig. 4.3 Removing the measurement cell assembly
Fig. 4.4 Removing the measurement cell cover
Fig. 4.5 Removing the measurement cell base plate
