Hach-Lange BUHLER 2000 Water sampler - Manual (Page 19)

Operation
Page 19 Manual BÜHLER 2000/1029
Sampling system
Vacuum sampling system
Metering vessel -structure-
1. Hose connector
2. Flange
3. Screw cap
4. Electrodes
5. Volume control tube
6. Metering vessel
7. Silicone discharge tube
8. Motor-driven pinch-valve
9. Air connection
Cleaning:
- Glass metering vessel: unscrew the screw cap (3) and remove the flange. Now, the metering vessel
together with the silicone discharge tube (7) can be detached.
- Plastic metering vessel: Turn the plastic metering vessel anticlockwise (bayonet fitting) and remove.
Adjustment of sample shot volume at samplers with glass metering vessel:
To adjust the desired sample volume, loosen the knurled screw and displace the volume control tube
vertically.
Adjustment of sample shot volume at samplers with plastic metering vessel:
The sampler is always delivered with the volume control tube in full length.
To adjust the sample shot volume, the volume control tube (5) has to be cut
to length.
Procedure
1. There is a graduation in millilitres on the volume control tube.
2. Remove the metering vessel (6).
3. Cut the volume control tube to the desired length with scissors or a knife.
4. Reinstall the metering vessel (6) and tighten.
5. Check the sample volume by starting a manual sample extraction.
6. Now the device is ready for operation.
Remark: If you need to work with different sample volumes, you can cut to
size several tube pieces. As the volume control tube (5) is only
slipped on the hose connector (1), it is very easy to change the tube.