Hach-Lange BUHLER 2000 Water sampler - Manual (Page 20)

Operation
Page 20 Manual BÜHLER 2000/1029
Operation principle:
1. Inoperative
position
2. Pinch-valve
closes
3. Metering
vessel is filled
up to the
electrodes
4. Dosing system
is aerated
5. Pinch
valve
opens and
sample
drains off
in bottle
Replacement of the silicone discharge hose
The silicone hose (BM69301) is only pushed over the lip of the metering vessel. A hose clamp is not
required. Humidify the hose a little bit, fix it at one point and push it over the lip.
Remark:
Do only use original spare parts from the manufacturer. The use of a wrong hose type can lead to
malfunctions at the system or may even damage the pinch valve!
Remark:
Conductivity of the sample medium
There are two conductive level electrodes in the metering vessel. Their sensitivity can be adjusted in the
service menu. In the factory the electrodes are adjusted to tap water (this adjustment does not have to
be changed under normal operating conditions). Minimum conductivity 50
μS/cm.
Please note that a wrong adjustment can lead to a flooding of the pneumatic system and to the
damage of component parts.
The sampler is not suitable for extraction of distilled water due to low conductivity.
Conductivity at 25°C
Rain water 50
μS/cm
Drinking water 500 μS/cm
Waste water 5000 μS/cm (5 mS/cm)
Seawater 50000 μS/cm (50 mS/cm)
ATTENTION:
Wrong operating conditions can lead to malfunctions or may even damage the apparatus. No liability or
claims under guarantee will be accepted in respect of any damage arising from the non-observance of
these operating instructions.