Hach-lange ORBISPHERE 31xxx Basic User Manual Manuel d'utilisateur télécharger pdf (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

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