Hach-Lange ORBISPHERE 31xxx Basic User Manual - Manual (Page 8)

What you have received
Check that all mounting hardware is included. Note that, unless the sensor is part of ORBISPHERE
equipment that includes it, the sensor must be installed in an ORBISPHERE socket or flow chamber
that allows contact with the sample flow to be analyzed (refer to
Installation on page 8 for details).
An oxygen, ozone, or hydrogen electrochemical sensor
The sensor head is protected by a screw-on plastic storage cap. A plastic screw-on base protects the
connection socket, and provides at the same time a suitable stand.
Figure 2 Sensor components
1 Storage and calibration cap 3 Sensor base 5 Collar
2 Protection cap 4 Connection to instrument
A sensor maintenance kit
The maintenance kit includes the material needed to service and maintain the sensor.
Installation
Initial sensor cell cleaning
Your ORBISPHERE electrochemical sensor has been thoroughly cleaned and tested at the factory.
To protect the electrodes from oxidation, the cell has been filled with electrolyte and a membrane has
been installed.
However, shipping and storage conditions can adversely affect electrochemical sensor cells,
therefore a sensor service (cell cleaning & membrane replacement) must be performed before using
the sensor.
To perform a sensor service, see the instructions in the section entitled
Maintenance on page 10. If
you are not familiar with sensor servicing, your Hach Lange representative will be glad to assist you.
Note: Electrochemical H
2
sensors do not require a complete cleaning procedure, as dechloridization and
rechloridization processes are normally not required.
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 two 10 pin connectors. The
standard sensor cable length is 3 meters, but extension cables of up to 1,000 meters are available,
still retaining the same signal sensitivity. 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
• on a horizontal pipe section (or on flow-ascending vertical pipe)
• minimum of 15 meters away from the pump's discharge side
8 English