Hach-Lange ORBISPHERE A1100 Family - Manual (Page 24)

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Installation
4.2 Sensor installation
4.2.1 Sensor positioning information
Unless the sensor is part of the ORBISPHERE equipment that includes it, the sensor must be
installed in an ORBISPHERE 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.
Note: If the model 28117 pressure sensor is used, the maximum cable length is 50 meters.
Ensure that the sensor will be mounted:
• perpendicular to the pipe
• horizontal
• on a horizontal pipe section (or on flow-ascending vertical pipe)
• min. 15 meters away from 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
2
injection system or similar
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.
25. Finally, screw the protection cap locking
washer back into place in a clockwise
motion, and tighten finger tight.