Ratek TH8500 Programmable Immersion Heater Circulator - User Manual
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Page 19 of 28
To End the Program
-
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 in static mode.
Important –
Do
NOT
set the operating mode to
as you will be locked out of the menu system. The off mode
is used for service only. Use the
mode for manual operation. In the case where you have accidentally set
the mode to
and the controls cannot be accessed, press
+
simultaneously to restore the
controller to static operating mode.
Important:
Once the program has ended, if the Program – Running Indicator and Program – Hold Mode Indicator
are flashing simultaneously, press
and
together to return the controller back to static operating mode.
Setting the Over and Under Temperature
Alarms
The TH8500 is equipped with an over-temperature audible and visible alarm, as well as a visible under-temperature
alarm. Both alarms are configurable by the user.
The alarms are configured as deviation alarms whereby they operate relative to the desired set point. If the current
temperature deviates from the set temperature by the margin configured by the user, the alarm will activate.
*Note:
The under temperature alarm will only activate once the current temperature has reached the initial desired
set point, this is by design.
To configure the alarm set points :
-
Press
repeatedly until
is displayed in the Current Temperature/Parameter Display.
-
Press
or
to set the desired deviation for the over-temperature alarm.
Important :
The over-temperature alarm should be entered as a
positive
value.
-
Press
repeatedly until
is displayed in the Current Temperature/Parameter Display.
-
Press
or
to set the desired deviation for the under-temperature alarm.
Important :
The under temperature alarm should be entered as a
negative
value.
-
Press
to exit the menu. The current and set temperatures will be displayed.
Loading/Un-Loading the Water
Bath
CAUTION
NEVER place your hands near the heating element whilst the Immersion Heater Circulator is heating as serious burns
and scalding could result.
ALWAYS use appropriate tools (such as silicon insulated tongs) to load and unload items from the water to avoid
your hands coming into contact with hot water or the heating element.
