5. Operation
5.1 General
Connect to the electricity supply – DO NOT
SWITCH ON. Place the unit on a firm level
non-slip surface and
fill the bath with the required level of water,
ensuring that the level sensor is below the water
level.
5.2 Recommended Bath Water
The inner containers of the Stuart water baths
are manufactured from grade 304 stainless steel,
a material which is extremely hardwearing, easy
to clean and with excellent corrosion resistance.
It is important to remember that although
stainless steel has a higher resistance to
oxidation than ordinary steel in various
environmental conditions, it is not rust and
corrosion proof. Care must be taken when using
the baths not to use or introduce chemicals
which may cause damage to the surface of the
bath. Regular cleaning and maintenance will
prolong the life of the bath and enable
continued use for many years.
For the Stuart baths we recommend water,
preferably distilled or deionised, with neutral pH.
Ultra pure deionised or RO water with a
resistivity >1Mohm should not be used, as this
can leach the iron from the stainless steel and
lead to corrosion. If necessary, add a little tap
water to the pure water in the bath. Hard tap
water should also be avoided as this can cause
build up of scale inside the bath and on the
heating elements. Other salts in tap water such
as chlorides and sodium ions can also lead to
pitting and corrosion.
5.3 Loading the platform
Arrange the vessels on the platform outside the
bath. Position the retaining springs where
required to secure the load. When the load is
secured place the platform inside the bath.
NB For safety, Do NOT remove the platform
from the bath when the water is hot.
5.4 Setting the speed
Switch the shaking unit ON by pressing ON/OFF
key (see fig 3). The red indicator light above the
speed control will illuminate. To select the speed,
turn the speed control knob clockwise, until the
desired setting is obtained.
The speed can be adjusted without halting the
unit.
Shaking can be halted at any time by pressing
ON/OFF key.
5.5 Setting the temperature.
The shaking water bath temperature control is
located on the right hand side of the control
panel. To turn the temperature control ON,
press the ON/OFF key (see figure 3). The LED
display will show the current temperature of the
water within the bath.
3
Figure 3: SBS40 control panel
Temperature control
ON/OFF key
Temperature
display
Motor 'on'
indicator light
Temperature
press to set key
Shaking
unit
ON/OFF
key
Temperature
selector knob
Shaking speed
control
