Grant Instruments XUB Series - Manual (Page 25)

XUB Series 29666 V1
Operating Manual
23
EN
Technical information
The need to degas
In order to allow optimum ultrasonic activity, the gases present in ordinary tap water
need to be driven out of the cleaning solution.
The time needed to degas the liquid varies depending on the amount of gas present in
the liquid and the quantity of water in the tank. Grant recommends a degas period of
at least 10 minutes.
During the degas cycle, you will see bubbles of gas forming on the inside of the bath,
and slowly rising to the surface. Degassing is complete when you can no longer see
these bubbles.
Another indication that the liquid in the bath has degassed is an increase in the
appearance of „cold boiling‟ at the liquid surface.
Once the liquid is degassed, the bath is immediately useable and will run the cleaning
cycle.
The effect of heat
Heating the liquid in the bath will
aid the cleaning process.
Normally a temperature of
between 30 to 60°C is sufficient to
accelerate the process. You will
see from the graph that optimum
cleaning will be obtained at 60°C.
If you are using your bath to clean
medical equipment, it is recommended to limit the fluid temperature to 35°C. This will
avoid “baking” proteins.
Ultrasonic activity itself will heat up the liquid at a rate of approximately 10-15°C per
hour if in continuous use. In order to heat the fluid in the tank at a faster rate, it is
recommended to run the ultrasonics as well as turn on the heating.
Cleaning time
The Grant digital ultrasonic bath is factory preset with a cleaning time of 15 minutes.
Some components may take longer or shorter to clean effectively depending on the
contaminants and the level of contamination.
Average power
0
20
40
60
15 25 35 45 55 65 75 85
Temp (Deg C)
P
o
w
er
(W
at
ts
/I
n
ch
^
2)
Av Power
-3dB point