Calibration of Intelect Legend XT Combo Units 1. Position the Ultrasound Applicator in the Ohmic Power Meter. 2. Power up the electrotherapy unit. 3. Press ‘HOME’ & ‘<<’ button simultaneously. On older units, you may need to press ‘STOP PAUSE START’ at the same time, and then press HOME’ & ‘<<’ button simultaneously. 4. Press two upper-right buttons (right of screen) simultaneously. 5. Press ULTRASOUND CALIBRATION button. 6. Press the Start button in the upper right hand corner of the screen. 7. When screen on unit reads: ‘SET POWER TO 4.0 WATTS: 0’, adjust scale on Ohmic Power Meter to zero watts (make sure meter is in watts, not grams). 8. Increase intensity on electrotherapy unit until Ohmic Power Meter reads 4.0 watts. Turn up intensity slowly. 9. Follow all remaining instructions carefully. Look for indication calibration is complete. 10. Ultrasound outputs per the Service Manual specifications