620 Series
4
Safety and warnings
The 620 series will not present a safety risk when you use it as instructed in this User
Manual. However, it is possible that the environment where you use the instrument may
present a safety risk. For this reason, always follow correct, safe working practices.
WARNING
Always be aware of the risks in the environment where you are working.
• The 620 series is NOT intrinsically safe. DO NOT use it in an atmosphere
where explosive vapours or dusts might exist.
• Wear approved ear defenders when taking measurements in noisy
environments.
• Wear approved protective PPE suitable for the environment where you are
taking measurements.
• Always follow local safety regulations and be aware of risks in the area
where you are working.
CAUTION
The 620 series is a precision instrument. Always handle it with care. Do not drop
the instrument or subject it to mechanical shock.
Do not overtighten the microphone which should only ever be finger tight. Don’t
use pliers to tighten or undo the microphone should it become stuck.
CAUTION
The 620 series contains no user serviceable parts. If a fault is suspected, return
the instrument to Casella or a Casella approved service centre.
CAUTION
The 620 series operate from batteries (or optional mains power).
• Use only batteries of the correct type, and do not mix battery types in the
instrument.
• Do not try to charge non-rechargeable batteries.
• Do not leave discharged batteries in the 620 series.
• Install new batteries as a complete set. Do not fit batteries that have a
mixed state of charge.
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