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Low Temp Furnace Model ITL-M-17701 13-07/20
Figure 8: The USER ACCESS page
1. Proportional band
2. Integral time
3. Derivative time
4. Autotune enable
5. Display units
6. Fixed offset
7. Network IP type
8.
Setpoint Ramp Rate °C/min
Changing the Set Point
The main controller will control temperature of the furnace. The setpoint is accessible from the Home page
of the controller. The controller is only active when enabled by the overtemperature controller.
To compensate for any errors in the linearity of the display temperature, the user can adjust the linearity
using the 8 point adjustment curve for each furnace. See section below for details on how to do this.
To change the Setpoint of the equipment:
1. From the ISOTECH homepage, press the SCROLL button once, this will highlight the SETPOINT
ADJUST box.
2. Press the SCROLL button once more and this will allow adjustment of the setpoint via the UP/DOWN
buttons.
3. Scroll to the desired set point as described above.
4. When the temperature is set, press the SCROLL button again to enter and save the setting.
5. The equipment will now raise or lower the furnace temperature as required.
How to globally change from °C to °F or Kelvin:
1. Log in as the Engineer
2. Scroll to INSTRUMENT
3. Scroll to DISPLAY
4. Scroll to UNITS
5. Select by pressing the Scroll button
6. Use up/down to select from °C, °F or Kelvin
7. Press the Page button to exit and save the selection
Process to apply a User linearization to the furnace
From time to time the control sensors inside the furnace will need to be adjusted as the sensor drifts with
time and use at high temperature. The controller has the capability to compensate for these errors using an
eight point correction curve. This will need to be regularly checked for errors and can easily be corrected
within the controller using the following procedure.
