Extech Instruments HDV7C-55-3 User Manual page 5

Do not bend or force the probe end into a position
> 90°, damage to the probe could result.
Do not coil the probe to a diameter greater than 6
inches (15 cm) in use or when storing.
Replace the protective cap and tighten the protec-
tive ring when storing the probe.
The probe contains sensitive circuitry that controls
the optics and electronics of the camera. Do not
strike the probe or allow it to impact objects
forcefully.
Immerse probes only in approved liquids (see the
Specifications section).
Use a high quality cleaning fluid and swab to clean
the camera head.
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