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3.2
Heater Restrictions.
Each channel of the controller can individually deliver up to 10 amps of current at
230 VAC, but the combined total current from Channels 1 & 2 can not exceed 15 amps. These current
ratings are limited to resistive loads (heating mantles, hot plates, ovens, etc.).
Use only resistive loads that
are safely operated at 230 VAC and require less than 10 amps
or damage to the controller and a safety
hazard may result.
•
Do not plug oil baths into your controller. Oil baths are not 230 VAC devices and become a fire
hazard unless properly connected to the controller.
(See Appendix for an application note
describing the use of oil baths with this controller). Ask about J-KEM’s new 400 series controllers for
use with oil baths.
3.3
Ramp-to-Setpoint & Soak Feature.
A new feature of J-KEM’s controllers called ‘Ramp-To-Setpoint’
allows you to enter a specific heating rate (e.g., heat to 120
o
C at a rate of
5
o
C/Hour), a second feature
called ‘Soak’ then lets you specify how long to stay at that temperature before turning off.
Examples of Program Ramps
The controller is shipped with the Ramp-to-Setpoint feature OFF, the user must specifically turn Ramp-to-
Setpoint ON. When Ramp-to-Setpoint is OFF, the controller heats to the entered setpoint at the fastest rate
possible. When Ramp-to-Setpoint is ON, the controller heats at the user entered ramp rate.
The Ramp-to-Setpoint feature and its associated parameters are turned on and set in the controller’s
programming mode. The parameters of importance are:
SPrr
SetPoint Ramp Rate. Allowable Values: 0 to 9990 deg/Hr.
This specifies the desired rate of heating (cooling). Note, this parameter specifies the
desired
rate of heating
(cooling), but in cases of extremely high ramp rates the reaction will not actually heat faster than the power
of the heater will allow.
SPrn
SetPoint Ramp Run. Allowable Values: ON, OFF, Hold
This parameter turns the Ramp-to-Setpoint feature ON or OFF. During an active run, if this parameter is
set to ‘Hold’, the setpoint ramp stops and
holds
at its’ current value. This continues until the parameter is
set to ON or OFF. When set to OFF, the values in SetPoint Ramp Rate and Soak Time are ignored.
SoAK
Soak Time. Allowable Values: “- -”, 0 to 1440 min.
This specifies the amount of time to
soak
at the setpoint after the setpoint temperature ramp is complete. A
setting of
“- -”
causes the controller to remain at the final setpoint indefinitely. A numeric value causes the
