Hach NV3300, User Manual

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Attach compressed air (not for flow cell operation)
N O T I C E
Make sure that the air pressure is not more than 7 bar or damage to the valve can occur.
The probe has measuring windows with nano-coating and a compressed air cleaning system. Both
components are important to prevent particles in the optical path or fouling of the measuring
windows.
1. Use a 13 mm (0.5 in.) wrench to install the compressed air connector on the probe. Refer to
Figure 8 .
2. Attach the compressed air tube to the compressed air connector. Refer to Figure 8 .
3. For the compressed air line, install the High Output Airblast System (HOAB), the optional High
Pressure Air Cleaning System or a magnetic valve/external compressed air supply. Set the air
pressure between 3 and 6 bar. Make sure that the total length of the compressed air line is less
than 25 m (82 ft).
Note: Do not make a measurement during the cleaning interval. When compressed air supply is controlled by
the controller, measurement and cleaning are synchronized. Refer to
Set the automatic cleaning options
on page 13.
Note: Add a check valve in the compressed air line to prevent clogging in the compressed air connector.
Figure 8 Compressed air connection
1 Compressed air connector 3 Optical windows
2 Compressed air line 4 Optical path
12 English