Pre-Installation - Hach ORBISPHERE 31xxx Manuel D'utilisation Simplifié

• The storage place must be at a stable room temperature.
Pay attention to rapid temperature change situations, such as air conditioning being turned on and
off daily, that may create condensation inside the sensor's cell and damage the electronics inside.
Section 5 Installation

5.1 Pre-installation

1. The sensor head is protected by a screw-on black plastic storage cap. This cap should be
removed.
2. Once the storage cap has been removed, an orange sticker will be visible informing you not to
remove the protection cap. This is because the sensor has already been checked and calibrated
prior to shipping, and no sensor maintenance or membrane change is required prior to first use.
However, this label must be removed.
3. Attach the two small identification clips (stamped with the letter "T") to each end of the sensor
cable so they are clearly visible. These clips indicate this is a TC sensor, so when connecting to a
multi-channel analyzer, care must be taken to connect it to the TC measurement board.
5.2 Sensor positioning
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 the contact with the sample fluid to
be analyzed.
The sensor and measuring instrument are connected by a cable and 10 pin connector. The standard
sensor cable length is 3 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
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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 representative to appraise the situation and define the best applicable solution.
5.3 Sensor insertion
• Insert the sensor straight into the flow chamber or socket. Do not twist the sensor.
C A U T I O N
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English 9