Hach ORBISPHERE 31290TC Manuel D'utilisation Simplifié page 9

We recommend you use the ORBISPHERE 32605 Purge safety backup unit to ensure that the
purge gas supply to the sensor will not get interrupted in case of a mains power outage. See
safety backup unit on page 11.
Instructions for sensor storage
• If the sensor's head shows deposits, rinse it under tap water.
• Wipe the sensor head dry.
• Put a small silica desiccant bag inside the storage cap.
• Put the storage cap in place.
• Store the sensor in a safe dry place.
• 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 6 Installation
6.1 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.
4. Make sure that the gas purge supply is set to ON before the sensor is installed in a line or a flow
chamber that contains liquid or humidity. If the sensor does not have purge gas supply when it is
in aqueous liquid or condensing humidity, permanent damage to the sensing element will occur.
6.2 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.
C A U T I O N
C A U T I O N
Purge
English 9