About The Waterproof; [Hm-Ta20] - Panasonic HM-TA2 Owner's Manual

(Important)
About the Waterproof/Dustproof
and Anti-shock Performance of this
unit [HM-TA20]
Waterproof/Dustproof Performance
This unit's waterproof/dustproof rating complies with the
"IP58" rating. Provided the care and maintenance guidelines
described in this document are strictly followed, this unit can
operate underwater, to a depth not exceeding 3 m (10 feet) for
a time not exceeding 60 minutes. (*1)
Anti-shock Performance
This unit also complies with "MIL-STD 810F Method 516.5-
Shock". This unit has cleared a drop test from a height of
1.5 m (5.0 feet) onto 3 cm (0.10 feet) thick plywood. In most
cases this unit should not sustain any damage if dropped from
a height not exceeding 1.5 m (5.0 feet). (*2)
This does not guarantee no destruction, no malfunction, or
waterproofing in all conditions.
*1 This means that this unit can be used underwater for specified time
in specified pressure in accordance with the handling method
established by Panasonic.
*2 "MIL-STD 810F Method 516.5-Shock" is the test method standard of
the U.S. Defense Department, which specifies performing drop tests
from a height of 122 cm (4.0 feet), at 26 orientations (8 corners,
12 ridges, 6 faces) using 5 sets of devices, and passing the
26 orientation drops within 5 devices. (If failure occurs during the
test, a new set is used to pass the drop orientation test within a total
of 5 devices.)
Panasonic's test method is based on the above "MIL-STD 810F
Method 516.5-Shock". However, the drop height was changed from
122 cm (4.0 feet) to 150 cm (5.0 feet) dropping onto 3 cm (0.10 feet)
thick plyboard. This drop test was passed.
(Disregarding appearance change such as loss of paint or distortion
of the part where drop impact is applied.)
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