Carbolite 3508 User Manual download pdf (Page 9)

Basic Operation

9 MC19-1.20

5 Programming

5.1 Programming Notes

Programs can be created in Level 1 or Level 2 of the 3508.

For the P10 and P25, new programs can be created while the current program is running.

To avoid unwanted heating at the end of a program, set the controller SP temperature to

zero before running a program.

All new unused programs show only 1 segment of type End.

The minimum number of segments for a program is 2. The second being an End type.

Ramp-to-setpoint control. To achieve this, create a two segment program. Set the first

segment type as Rate or Time. Set the second segment type End type Dwell.

For the P10 and P25, programs can be linked together using a “Call” segment. However a

lower number program can not be called and a program can not be ended with a call

segment.

A program can be ended in four ways:

1. With End segment set to S.OP the power to the elements is turned down to 0%, no

matter what the Setpoint temperature is.

2. With End segment set to Reset and the Setpoint temperature turned down to zero,

power to the elements will be 0%. To do this set the Setpoint temperature to the

minimum possible. For type B thermocouples this will be bellow zero.

3. With the End segment set to Reset. The controller will try to reach and maintain the

Setpoint temperature.

4. With the End segment set to Dwell. The controller will dwell at the PSP of the last

segment (RUN indicator flashes), until it is reset.

To reduce the number of segments in a program, change the last required segment to an

End type. You will be asked to press  to cancel or  for OK.

To cancel all segments in a program, change the first segment to an End type.

To alter parameters or segments of a running program, this program must be held or reset.

Press RUN/HOLD to pause the program, or press RUN/HOLD for 2 seconds to reset.

5.2 Holdback

Holdback can be used to prevent the program from running ahead of the actual heating or

cooling.

The Holdback value is the amount, in degrees, by which the Program Setpoint can run

ahead of the measured temperature before Holdback operates. The value applies to a

whole program.

To set the value press page  twice, press scroll  until Holdback Value appears and press

up  or down to set.

Holdback can be used in Rate, Time and Step segments.

 For Rate and Time segments Holdback will operate during the segment.

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Carbolite 3508 User Manual Page 9