Ratek WBx000D Series Water Bath - User Manual
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Page 11 of 21
Switching On The Water Heating
CAUTION
Ensure you have filled the water bath to at least the minimum required level before switching on power to the heating system.
Failure to do so may create a hazardous situation that can cause burns, scalding and create a fire risk. Ensure the mesh
platform is fitted at all times during operation.
-
Before switching on the water heating, determine the temperature you wish to operate the bath at.
-
If you wish to heat your containers from ambient temperature, you should load containers onto the the mesh platform prior
to switching on the heating system, see the section titled “Loading the Water Bath” below.
-
If you wish to add your containers to warm or hot water, this should be done with extreme care once the temperature of
the water bath has stabilized.
-
Once you are ready to begin heating the water, switch the On/Off mains power switch (element 6 in Figure 1) down to the
position marked with a vertical line. The power indicator (element 7 in Figure 1) will light up.
-
If the last set temperature is greater than the current water temperature, the Heating Element Indicator (element 8 in
Figure 1) will light up and either flash to indicate intermittent heating or remain lit constantly to indicate constant heating.
CAUTION
Once the Hot Surface Indicator (element 10 in Figure 1) is lit, the heating element has achieved a temperature sufficient to
cause burns or scalding. Once the Heating Element Indicator has lit, under no circumstances should you remove the mesh
platform or place any part of your body near the heating element. The residual heat of the element creates a hazardous
situation sufficient to cause burns or scalding if contact with the element is made.
Setting the Required Water Temperature
-
The water heating control circuit will retain the last used temperature set-point set on the control panel, so for many
applications it will only ever need to be set once.
-
The LCD temperature display (element 4 in Figure 1) indicates the current water temperature in degrees Celsius in its
default operating mode.
-
Quickly pressing either the up or down temperature control buttons (element 5 in Figure 1) will temporarily display the
currently configured temperature set-point without altering it.
-
To change the set-point,
hold
either of the temperature control buttons, the longer the press the faster the rate of
change. The set temperature on the LCD temperature display will alter.
-
Once the adjustments have been made, the LCD temperature display will return to show the current water temperature
after a few seconds.
-
If the last set temperature is greater than the current water temperature, the Heating Element Indicator (element 8 in
Figure 1) will light up and either flash to indicate intermittent heating or remain lit constantly to indicate constant heating.
-
Once the water temperature nears the set point, the PID temperature control circuit will start to intermittently engage the
element to reduce the rate of heating.
-
It is normal for the water temperature to exceed the set point slightly in un-circulated baths whilst the
temperature stabilizes. The bath temperature will gradually drop back to the desired set-point as the water
temperature equalizes. Temperature stability will suffer with insufficient water in the bath.
CAUTION
If the temperature of the water in the water bath is critical to your application, ensure the water bath is left for at least 30
minutes to stabilize after the temperature has reached the set-point before you insert your containers and samples into the
water. Verify the water temperature using a thermometer.
