17
MAINTENANCE
The sensor windows should be kept clean and grease free. Grease and finger marks
that look clear may be opaque to UV. Ensure that solvents do not come into contact
with plastic parts, especially the acrylic window over the visible (left-hand) sensor.
It is permissible to use a cloth dampened with clean water, ethanol, methylated spirits
or iso propyl alcohol (IPA) to clean the outside of the 765.
Keep all fluids and other contaminants away from the humidity sensor in the probe at
the top of the instrument.
Long term storage
If the instrument is to be stored unused for over a year the batteries should be
removed.
USA FCC Radio interference statement
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
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