Grant Instruments XUB Series - Manual (Page 31)

XUB Series 29666 V1
Operating Manual
29
EN
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 Grant ultrasonic cleaning bath can be set so that the cleaning fluid is up to 70°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 Grant 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