Process Technology DE20 Instruction Manual
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Process Technology DE20 Instruction Manual

Digital temperature control
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DE20 Instruction Manual

TABLE OF CONTENTS

DE20 Digital Temperature Control
Specifications....................................................................1
General Description.........................................................2
Installation Procedure.....................................................2
Overtemperature Protection...........................................3
Set Point & Features.........................................................4
Alarm Feature.....................................................................4
Error Conditions................................................................4
Error Messages.................................................................4
Power and Relay Wiring....................................................5
2 Wire RTD Sensor Calibration.......................................6
Resistance Signal Calibration.......................................7
3 Wire RTD Calibration..................................................7
Thermocouple Calibration.............................................8
Voltage Signal Calibration..............................................8
Current Input Calibration.................................................9
Frequency Signal Calibration.....................................10
7010 Lindsay Drive • Mentor, Ohio 44060 • Phone: 440-974-1300
USA/CN: 800-621-1998 • Fax: 440-974-9561 • www.process-technology.com
M-33-01-02 02/17/11
Configuration (Setup)....................................................10
Main Menu Summary.....................................................10
Sensor Type (U1).............................................................11
Signal Offset (U2)...........................................................11
Signal Filter Setting (U4)..................................................11
Set Point Dead Band (U5) .........................................12
Display Stabilizer (U8)...................................................12
Set Point Limit (L)..........................................................12
Heating or Cooling Switch (F2).....................................12
Alarm On/Off Switch (F3)..............................................13
Unit Display Enable (F4)..................................................13
Temperature Units Conversion (F5)............................13
Sensor DIP Switch Settings........................................13
Electrical Noise and Interference.................................13
Illustration of a Typical Heater Installation in a
Process Tank ...................................................................14

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Summary of Contents for Process Technology DE20

  • Page 1: Table Of Contents

    DE20 Instruction Manual TABLE OF CONTENTS DE20 Digital Temperature Control Specifications..............1 Configuration (Setup)............10 General Description............2 Main Menu Summary.............10 Installation Procedure.............2 Sensor Type (U1).............11 Overtemperature Protection...........3 Signal Offset (U2)............11 Set Point & Features............4 Signal Filter Setting (U4)..........11 Alarm Feature..............4 Set Point Dead Band (U5) .........12 Error Conditions..............4...

  • Page 2: Specifications

    A more common source of DE20 Specifications interference occurs when the control is switching inductive loads such as contactor coils, solenoids or 2 wire- 1000 ohm RTD TCR (alpha), motors.

  • Page 3: General Description

    The temperature sensor (i.e. RTD or thermocouple) This setting may be set to a zero (0) or a one (1). When set to one (1), the DE20 will display either a “C” or an sends a signal to the DE20 controller. The DE20 com- “F”, separated by a decimal point.

  • Page 4: Overtemperature Protection

    “F5” setting Note: This does not apply to THERMOCOUPLES. You In addition to thermal protection, Process Technology Voltage Sensor - Number represents tenths of a volt (0.1 VDC)

  • Page 5: Set Point & Features

    “SET” key and the increase “ ” key A small “c” in the lower left-hand corner indicates the Using a small value for this setting will cause the DE20 control to respond more quickly to sudden changes simultaneously and holding them for approximately control is relying on default configuration values.

  • Page 6: Power And Relay Wiring

    Power , Heating and Cooling Relay Wiring (rear view of controller) use the increase “ ”, decrease “ ” buttons to bring The DE20 control measures frequency and com- the particular setting into the view on the display. pares that measurement with a “standard” set of val- Press the “SET”...

  • Page 7: Wire Rtd Sensor Calibration

    20.0. Step 11: Turn OFF power to the control and remove The DE20 control measures the DC current and com- the power supply. Reinstall the voltage input and the pares that measurement with a “standard” set of val- Step 10: Press and hold the “SET”...

  • Page 8: Resistance Signal Calibration

    Step 5: CAREFULLY restore power to the controller, making sure that you do not come in contact with any Equipment needed: The DE20 can be equipped with an optional thermo- exposed voltage. Two precision resistors (tolerance +/- 0.1% couple sensor board (Item Number 5417). Installa- Step 6: Press the decrease “...

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