Ratek TH8500 Programmable Immersion Heater Circulator - User Manual
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Page 15 of 28
Operating Instructions
Operating
Modes
The TH8500 features 2 main operating modes allowing the user to either set and maintain a single temperature, or
to run advanced temperature ramping via user definable profiles.
-
To operate and maintain a single temperature, refer to the section of this User Manual titled “Operating a
Single Static Temperature”.
-
To enter and run a program with more than one set point or temperature ramp, refer to the section of this
User Manual titled “Operating a Ramping Profile”.
CAUTION
If the temperature of the water in the water bath is critical to your application, ensure the Immersion Heater
Circulator is left for at least 10 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.
Temperature stability is affected by water bath size, ambient temperature, position of the pump outlets, lid usage
and the heating medium. All of these factors should be considered to achieve best results.
CAUTION
Temperatures above 50 degrees are sufficient to cause steam and are also capable of causing burns or scalding.
Exercise extreme care paying particular attention to steam and splashing of water when the Immersion Heater
Circulator is operating at these high temperatures, particularly whilst loading and unloading, containers, racks or
accessories. ALWAYS use appropriate tools (such as silicon insulated tongs) to lower such containers into the
water to avoid your hands coming into contact with hot water.
Operating a Single Static
Temperature
-
The Current Temperature/Parameter Display indicates the current water temperature in the bath.
-
By default, the Set Temperature/Parameter Display indicates the desired set temperature.
-
If the unit has just been powered on, the default operating mode is Static, indicated as
in the operating
mode menu.
-
If the unit has been operated in another mode, first change the operating mode as below :
-
Press
until
is displayed in the Current Temperature/Parameter Display.
-
Press
until
is displayed in the Set Temperature/Parameter Display.
-
Hold
for 5 seconds then release to commit the changes to the operating mode.
The current and
set temperatures will now be displayed.
-
To adjust the set temperature press
or
to increase or decrease the temperature accordingly.
-
If the set temperature is greater than the current water temperature, the Heating Element Indicator 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 temperature control circuit will start to intermittently
engage the element to reduce the rate of heating.
