Endress+Hauser Stamolys CA71NO, Operating Instructions Manual

Page: 34 / 56

Maintenance
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Fig. 18: Valves and valve hoses
V1-4 Valves 1, 2 and 4
V3
Two channel switch (optional)
1 Sample
2 To the pump
3 Y-piece, connecting hose to valve 1, behind it
4 Outlet hose
5 Hose valve 2, front, standard
6 Hose valve 2 back, cleaning agent
7 Hose valve 1 front, sample
7.5 Replacing the static mixer
To replace the mixer, proceed as follows:
1. Rinse first with water and then with air (see SERVICE).
2. Unscrew the four screws on the photometer housing and remove it.
3. Disconnect the mixer from the photometer and from the T-piece below the photometer
housing or release the mixer from the holder.
4. Remove the old mixer and insert the new one.
5. Connect the new mixer to the photometer and the T-piece again.
6. Attach the photometer housing and screw it down.
7. After installation, refill the hoses with sample, standard or cleaning agent (SERVICE).
8. Carry out a calibration (PARAMETER ENTRY).
7.6 Replacing the photometer optical cell
"
Caution!
Handling with electronic componentries
Electronic componentries are sensitive to ESD. Discharge yourself, e.g. at an earth conductor, before
handling electronic componentries.
To replace the optical cell, proceed as follows:
1. Rinse first with water and then with air (see SERVICE).
2. Unscrew the four screws on the photometer housing and remove it.
3. Unscrew the four screws on the side of the photometer, where there is no ribbon cable.
4. Separate the photometer's electronics from each other.
5. Take out the cell and remove the hoses.
"
Caution!
Do not
under any circumstances touch the optical window of the cell with your fingers!
Otherwise, traces of grease remain on the optical surfaces. This can lead to corrupted measured
values.
6. Insert the new cell.
2 3
5 6 7
V1 V2 V4
1
4
V3