3.0 3508 Controller
The controller will immediately attempt to reach the set temperature and maintain it.
This will cause the product to heat as quickly as possible which may not be appropriate
where the product contains sensitive ceramic components. For products with ceramic
components, e.g. a tube furnaces fitted with a long ceramic work tube, use the ramp
rate feature set with a low heating rate such as 5°C per minute (300°C per hour), to
prevent damage.
3.6.3
Resetting the programmer
To reset the programmer to simple controller mode, press RUN/HOLD for 2 seconds.
Operating the current program
• To avoid unwanted heating at the end of a program, set the SP temperature to zero
before operating a program.
• Ensure the programmer is reset to simple controller mode before starting a program
by pressing RUN/HOLD for 2 seconds.
• To start the program, press RUN/HOLD twice, RUN will light up on the display.
The displayed Program Setpoint (PSP) follows ramps, dwells and steps as the program
runs. The SP temperature of the controller does not apply when a program is operating.
• To pause the program, press RUN/HOLD.
• To stop the program and return to simple controlling (reset), press RUN/HOLD for 2
seconds.
When the program ends, the programmer will either:
• Automatically reset to operation as a simple controller.
• Dwell at the last temperature of the program (with the RUN indicator flashing), until
the operator presses RUN/HOLD for 2 seconds to manually reset, or presses RUN/HOLD
once to restart the program.
• Turn power to the elements down to zero.
3.6.4
Understanding User Levels
There are two levels in the controller; Level 1(Operator) and Level 2 (Supervisor).
Level 1 (Operator) is for the day-to-day operation of the controller is not protected by a
security code. There are 3 pages at this level. Page 1, Customer Identity, can only be
altered in level 2. Page 2 shows the current program status. Page 3 is for writing and
viewing programs.
Level 2 (Supervisor) requires a security code to enter, but once enable, provides access
to additional parameters. A further 4 pages are accessible in this level as follows; Home
, Customer identity, Control Output Hi percentage, Units.
14
Summary of Contents for CARBOLITE GERO HTF 18/15
Page 36: ...4 0 3508 Dual Loop Cascade Power Limit View 36 ...
Page 55: ...Element Connections 1 phase Element Connections 3 phase 55 8 0 Repairs and Replacements ...
Page 58: ...10 0 Wiring Diagrams 10 0 Wiring Diagrams 10 1 239 4 5001 58 ...
Page 61: ...Notes Service Record Engineer Name Date Record of Work ...
