Grant Instruments XUBA Series - Manual (Page 18)

XUBA Series 29667 V1
Operating Manual
16
Temperatures of touchable hot surfaces
BS EN 13202:2000 gives the recommended maximum surface temperatures for dif-
ferent 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 max-
imum temperature.
If you operate your ultrasonic cleaner at temperatures above the recommended max-
imum, 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