Tightening Operations LED Indicators

During tightening operations, the MTRwrench 85 LED Indicators give the operator a visual feedback on the progress and result of the ongoing tightening operation:

Operation stage

LED indicators behavior

Meaning

Tightening program sent to wrench

Job Ready LED steady on

Wrench received the tightening program

Tightening in progress

Progress LED 1 blinking white

10-25% of torque reached or Loosening detected

Tightening in progress

Progress LED 1 steady white

25% of click torque reached

Tightening in progress

Progress LED 1 steady white
Progress LED 2 blinking white

40% of click torque reached

Tightening in progress

Progress LED 1 steady white
Progress LED 2 steady white

55% of click torque reached

Tightening in progress

Progress LED 1 steady white
Progress LED 2 steady white
Progress LED 3 blinking white

70% of click torque reached

Tightening in progress

Progress LED 1 steady white
Progress LED 2 steady white
Progress LED 3 steady white

85% of click torque reached

Tightening completed successfully

All Progress LEDs blink off

100% of click torque reached

Tightening result

All Progress LEDs steady green
+
Projection LED steady green


+

Result OK

Tightening result

All Progress LEDs blinking red
+
Projection LED steady red


+

Result Not OK

Possible causes according to tightening strategy:

  • Max torque exceeded.

  • Max Angle exceeded.

  • Time out.

  • Accidental loosening.

  • Wrong location.

  • Rehit.

  • Fast tightening.

  • Torque drop.

Relevant Information