Digi-Sense 3622571, 3622572, 3622573, 3622574 Instruction Manual

Power

Inlet

Grid

Support

Load
Fuse

(x2)

Load

Outlet (x2)

Sensor

Input (x2)

ON/OFF

Main

Power

Switch

Digital

Control

Module (x2)

ON/OFF

Alarm

Switch

Alarm

Operation Manual

Instruction Notes for 3622571, 3622572, 3622573, 3622574

Figure 1 Figure 2

General Description

This control is ideal for 2 independent temperature processes. This space saving design combines 2 controls into one
package to maximize bench space. This 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. Several input types are available. This
unit comes with an audible alarm function, 6’ detachable power cord and grid support bracket, which is ideal for fume
hood mounting to maximize bench space. This family of control accepts a type "J", “K”, “T” thermocouples or RTD 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 power switch.

2. On/Off alarm switch.

3. 15-amp output.

4. Circuit protection (fuses)

5. Audible alarm.

3/10 1 Rev.0

Up/Down keys:

Adjust the setpoint in

the lower display

Upper Display:

Indicates the

process value.

Advance Key:

Advances through

parameter prompts.

Infinity key:
Clears and silences
alarms, press to back up
one level, or press and
hold for two seconds to
return to the Operations
Menu.

Lower Display:

Indicates the

setpoint value.

Figure 3. Digital Control Module Detail

How to Setup and Operate each Channel

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. Push the power switch to the "ON" position. Wait five
seconds for the control unit to energize.

The control is shipped from the factory with the display reading in degrees C. If a display in degrees F is desirable, press
the UP/DOWN arrow keys simultaneously for three seconds to access the Setup Page. Press the Advance key until the
Celsius_Fahrenheit parameter [C-F] is shown in the lower display. Press the UP arrow key to change from C to F.

After changing the display, press the Infinity key to display the set point temperature and the process temperature
(temperature at the sensor).

To begin the heating application, use the Up/Down arrow keys to enter the desired set point temperature. This is shown
in the lower display. Press the Advance key to cycle through the Operations Page until the auto-tuning parameter [Aut] is
shown in the lower display. Auto-tuning is recommended in most applications. Auto-tuning allows the control to set the
parameters without those parameters being input by the user. It also minimizes the amount of temperature overshoot of
the set point and decreases the time required for the process to stabilize.

After setting the auto-tuning parameter [Aut] to ON, press the Infinity key to display the set point and process
temperatures. While the control is in the auto-tuning mode, the lower display alternately flashes the set point and the "Aut"
prompt. When tuning is complete, the lower display indicates only the set point.

3/10 2 Rev.0

Range Type J:

-200°C to 1200°C

Range Type K:

-200°C to 1370°C

Range Type T:

-200°C to 400°C

Range Type RTD:

-200°C to 800°C

The auto-tuning function can be aborted by setting auto-tuning [Aut] to OFF or switching off power to the control.
It is recommended that auto-tuning be used each time a process is being run. If the process is being duplicated, the

parameters learned in the initial setup are stored in the memory of the control and no repeat of auto-tuning is required.
Auto-tuning feature allows quick and simple automatic control for the majority of heating applications. This control is

capable of performing other control functions and has a variety of features.

Control Sensor

Proper placement of the sensor can eliminate many problems in the total 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 heater. In processes where heat demand is variable, the probe should be close to the work area.
Some experimenting with probe location can be tried to provide optimum results.

Specifications

Control Mode

- Microprocessor-based, single input, single output.

- PID parameters
Proportional band: 1 to 999o F

Reset: 0.00 to 99.99 repeats per minute.
Integral: 0.00 to 99.99 minutes per repeat.
Rate or Derivative: 0.00 to 9.99 minutes.

Operator Interface

- Advance, Infinity, Up and Down keys and ON/OFF switch.

- Dual, four digit LED displays.

- Thermocouple receptacle or (RTD) and 3-wire load receptacle.

Input

- Type J, K , T thermocouple or (RTD): input grounded or ungrounded.

- Automatic cold junction compensation and break protection for sensor.

- Degrees F or degrees C display; user selectable (preset for degrees C)

Primary Output (Heating or Cooling)

- 7.5 Amp per channel, 120 Volts.

Accuracy

- Calibration accuracy: 0.1% of span.

- Temperature stability: 0.2 oF / oF rise in ambient maximum.

- Voltage stability: 0.01% of span / % of rated line voltage.

Power

- 50/60 Hz 5%

- Data retention upon power failure via nonvolatile memory.

Operating Environment

- 32 to 149 oF / 0 to 65 oC; 0 to 90% RH, non-condensing.

3/10 3 Rev.0