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Operation Manual
Instruction Notes for DigiTrol II General Use Instruction Manual

General Description

This temperature control displays both the setpoint and process temperature and uses the most modern control
technology for the best temperature stability. The Auto-tune feature minimizes setpoint overshoot and learns your
process. Changing your setpoint is easily done with the interface keys. The controller can also perform ramp rate
operations to allow the user to slowly raise the process temperature. There are several input types available. This unit
comes with a 6' detachable power cord, grid support bracket, which is ideal for fume hood mounting to maximize bench
space. This control is a microprocessor-based, digital indicating, automatic temperature control with a single input and a
single output. It features an auto-tuning function that allows automatic setting of control parameters with a minimum of
user input required. This family of control accepts a type "J", "K", or "T" thermocouple input depending on the model
ordered.
The control automatically sets the PID parameters through a "learning" sequence in the auto-tuning mode. PID
parameters include proportional band, reset/integral and rate/derivative. User-friendly features include automatic LED
indicators to aid in monitoring and setup, as well as dual LED displays for process temperature and set point indication.
This control automatically stores all information in a non-volatile memory.,

Control Features

1. On/Off switch.
2. 15-amp output.
-
PID control mode (factory default) with Auto-tune algorithm.
-
ON / OFF control mode programmable (user programmable).
-
Manual Control Mode (user programmable)
4. Solid State Relay output.
5. Circuit protection (fuse)
6. Low profile housing.
7. Safety feature- Output is de-energized if sensing device is unplugged or damaged.
12/22/14
1
Rev.5 (EC 02.293.435)

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Summary of Contents for Glas-Col DigiTrol II

  • Page 1 Operation Manual Instruction Notes for DigiTrol II General Use Instruction Manual General Description This temperature control displays both the setpoint and process temperature and uses the most modern control technology for the best temperature stability. The Auto-tune feature minimizes setpoint overshoot and learns your process.
  • Page 2 How to Setup and Operate First, connect the heater load and the sensor to the load and sensor receptacles on the front panel. Next, plug the control line cord into an appropriate 3-wire grounded power receptacle. Turn the power switch to the "ON" position. Wait five seconds for the control unit to energize.
  • Page 3 Control Sensor Proper placement of the sensor can eliminate many problems associated in the total operation of the system. The probe should be placed so that it can detect any temperature change with little thermal lag. In a process that requires fairly constant heat output, the probe should be close to the heating source.
  • Page 4 Control Values: Operation Menu Parameter Name Glas-col value Default Operation Page [AUt] Autotune Default [C;M] Control Mode Active Default AUto Heat Proportional Band Default 25.0 F or 14.0 C [h;Pb] [C;Pb] Cool Proportional Band Default 25.0 F or 14.0 C...
  • Page 5 Setup Menu Parameter Parameter Name Glas-col Factory Setting Default Setup Page [LoC] Lockout Menu Default [SEn] Sensor Type Default SET FOR TC INPUT [Lin] Linearization TYPE [dEC] Decimal Default [C_F] Display Units [r;Lo] Range Low Default Max temperature for [r;hi]...
  • Page 6 Control mode operation Manual operation provides direct (time proportioned % time) control from -100% to 100%. A negative value is allowed only when Ot 1=Cool. Automatic operation provides sensory feedback ON/OFF or PID control. When the operation transfers from automatic to manual operation, the power level from automatic operation is retained and restored to the previous set point.
  • Page 7 5. When tuning is complete, the lower display indicates setpoint only and Aut reverts to OFF. The control installs appropriate PID tuning parameters and retains them in the non-volatile memory. *To abort auto-tuning, the operator must reset Aut to OFF. Auto-tuning may also be aborted by cycling power off and on. In all cases, aborting auto-tuning restores all original factory default values.
  • Page 8 Auto-tune: Automatically tunes the parameters to fit the characteristics of your particular thermal system. Cold junction compensation: Electronic means to compensate for the effect temperature at the cold junction. Cycle time: The time necessary to complete a full On-through-Off period in a time proportioning control system. Derivative/Rate: Anticipatory action that senses the rate of change of the process, and compensates to minimize overshoot and undershoot.
  • Page 9 Use only 250Volt fuse, 15 amp rating (120volt controls only) Warranty See the current Glas-Col warranty policy located under the General Sales Policy on the Glas-Col website at www.glascol.com. Glas-Col reserves the right to make product refinements without prior notice.

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