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10. Take a new Dacron
the center of the protection cap. It is very important that the mesh is in the center of the protection
cap and covering the entire grille. Lower the sensor onto the protection cap making sure not to
disturb the mesh.
11. Push the protection cap firmly into place, making sure one of the four slots in the protection cap
fits over the small locking pin (highlighted right). If it is necessary to turn the protection cap to fit
over the locking pin, ensure you only turn it clockwise to avoid unscrewing the cartridge.
12. Finally, screw the protection cap locking washer back into place in a clockwise motion, and
tighten finger tight.
4.2 Sensor installation
4.2.1 Sensor positioning
The sensor must be installed in a socket or flow chamber that allows contact with the sample fluid to
be analyzed. The sensor and measuring instrument are connected by a cable and two 10-pin
connectors. The standard sensor cable length is 3 meters though extension cables of up to
1000 meters are available. However, smart sensor technology is only available with distances of up
to a maximum of 750 meters. Ensure that the sensor will be mounted:
• perpendicular to the pipe
• on a horizontal pipe section (or on flow-ascending vertical pipe)
• minimum of 15 meters away from the pump's discharge side
• in a place where the sample flow is stable and rapid, and as far as possible from:
• valves
• pipe bends
• the suction side of any pumps
• a CO
injection system or similar
2
Note: There may be situations where not all the above conditions can be met. If this is the case, or you have any
concerns, please consult your Hach Lange representative to appraise the situation and define the best applicable
solution.
4.2.2 Sensor insertion
• Insert the sensor straight into the flow chamber or socket. Do not twist the sensor.
• Hand tighten the attaching collar.
• Connect the sensor cable.
• Check for leaks; replace O-rings if product leaks are visible.
4.2.3 Sensor removal
• If not using the ORBISPHERE 32003 insertion/extraction valve you will need to shut off the sample
flow and drain the sampling circuit of liquid.
• Remove the sensor cable connected at the sensor end.
• Hold the sensor body in one hand to avoid rotation, and unscrew the collar with the other hand.
• Pull the sensor straight out of the socket or flow chamber.
• Install the sensor storage cap and sensor base (to protect the connection).
Section 5 Maintenance
Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the
document.
8 English
®
mesh patch from the box of O-rings in the recharge kit. Place the mesh in
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