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Temperatures of touchable hot surfaces
BS EN 13202:2000 gives the recommended maximum surface temperatures for different
materials at various exposure times (see below)
Your
Hygea 6427
ultrasonic bath can be set so that the cleaning fluid is up to 60°C. This
means that parts of your ultrasonic cleaner will be above the recommended maximum
temperature. If you do operate your ultrasonic cleaner at temperatures above the
recommended maximum, then Ultrawave Ltd advise that you conduct a risk assessment,
and if appropriate fix a “Caution – Hot” warning label to your machine.
The following limit values are based on the harmonized standards –
-
BS EN 13202:2000 Ergonomics of the thermal environment - Temperatures of
touchable hot surfaces - Guidance for establishing surface temperature limit values
in production standards with the aid of -
-
EN 563: 1994 Safety of machinery - Temperatures of touchable surfaces -
Ergonomics data to establish temperature limit values for hot surfaces.
Materials/time-temp*
1 sec
4 sec
10 sec 10 min
8 hr
uncoated metal
65°C
58°C
55°C
48°C
43°C
painted metal
83°C
64°C
55°C
48°C
43°C
enamelled metals
74°C
60°C
56°C
48°C
43°C
ceramics, glass, stone
80°C
70°C
66°C
48°C
43°C
plastics
85°C
74°C
70°C
48°C
43°C
wood
110°C
93°C
89°C
48°C
43°C
Time
Contact
Part
1 sec
accidental contact
Outer case, tank flange
4 sec
parts held for short periods
knobs, switches
10 sec
parts continuously held in normal use
handles
10 min
prolonged use
handles
8 hr
continuous use
handles
