Stand-Alone Soft Touch Hookups

Quality Control Features

Improving Resistance Welding

Welding Setup Schedules

Field Calibration and Troubleshooting

Control Enclosures

Hookup Drawings and Schematics

Developing a Welding Lobe

Warranty Information

Contact Technical Support

Field Calibration and Troubleshooting



  • Soft Touch Trouble Shooting Instructions

  • 9180 Series Controls
    Step by step instructions for trouble shooting & calibrating Unitrol's Soft Touch Sensor Boards. Board # 9180-TS1B (For all 9180, 9180M,L,D type controls) This is especially helpful if you are seeing "DETECT TIMEOUT" messages. (Soft Touch Trouble Shooting.pdf)


  • Pressure Transducer Field Calibration Instructions

  • Step by step instructions for calibrating Unitrol's Differential Pressure Transducer System. (Option 9181-05 or 9181-05C) (transducer1.pdf)


  • Accustart Field Calibration Instructions

  • Step by step instructions for calibrating Unitrol's Accustart Differential Pressure Transducer System (Model 9580 or 9581) (accustart_cal.pdf)


  • Electronic Air Pressure Setting System Calibration

  • Step by step instructions for calibrating Unitrol's Electronic Air Pressure Setting System. (Option 9181-16) (EAP_Calibration.pdf)


  • Solution Secondary Current Calibration

  • 9180 Controls with SC Software
    SOLUTION controls are factory calibrated to match a Unitrol Standard. Unfortunately there is no practical traceable U.S. standard for calibration of non-sinusoidal AC current produced by a resistance welding machine. This document will allow you to use the special calibration feature included in this series control to match a separate or standalone weld checker. (Secondary Current Cal.pdf)


  • Check SCR Message - 9180 Series Controls

  • Step by step flow chart to diagnose the "CHECK SCR" message on the display of the 9180 Series Solution Controls. (9180 CHECK SCR flow chart.pdf)


  • Check SCR Message - 9280 Series Controls

  • Step by step flow chart to diagnose the "CHECK SCR" message on the display of the 9280 Series Solution Controls. (9280 CHECK SCR flow chart.pdf)


If you cannot find the answers here, you can contact us
by phone during regular business hours (9:00am to 5:00pm CDT) at 847-480-0115,
or email us anytime at info@unitrolelectronics.com

All documents are downloadable .pdf files. Get Adobe Acrobat Reader here.