BIOPAC® Systems, Inc. Logo

Amplifier baseline offset adjustment

If the signal from the amplifier is not on zero, it is possible to remove the offset by using the Zero Adj screw at the top of the amplifier.
  1. Make sure that the amplifier is set to the correct mode (AC/DC), the filters are adjusted correctly for the signal, and the electrodes or transducer is connected.
  2. Slowly turn the Zero Adj screw to adjust the zero position.
    • Optional: Adjust the vertical scale to see the small changes that occur when you turn the screw.
Note that if the gain is set too high the signal could rail at +10 or -10 Volts. It is sometimes easier to perform the adjustment if the gain is reduced. Turning the screw clockwise will move the signal up.
 
The zero position should not require constant adjustment. The amplifiers are very stable, and once the baseline has been set, it should not require further adjustment.

Associated Applications

Associated Application Notes

Spotlight On
free BIOPAC webinar

Save the Physiology Practical Lab with BSL HOME

BIOPAC is introducing Biopac Student Lab Home (BSL HOME)—a new product specifically geared towards teaching physiology labs remotely so students can still get hands-on, practical lab experience if social distancing and stay-at-home orders keep them out of the lab..

BSL HOME will allow your students to conduct physiology labs in the safety of their own home, dorm room, or any remote location.

Watch Now!

Register Now
Latest News

BIOPAC Systems Helps STARK Industries Launch VITAL Ventilator for NASA JPL

BIOPAC’s ventilator testing equipment and expertise supports STARK Industries’ effort to manufacture, validate, and test NASA JPL’s VITAL Ventilators Goleta, California – June 16, 2020 BIOPAC Systems, Inc. announced a partnership with STARK Industries, LLC to provide ventilator validation and testing equipment for the mass production of ventilators. STARK Industries was awarded a global license […]

New Citations | Kick Off Summer with New Research in Exercise Physiology!

Comparing Muscle Movement and Involvement between Boxing Punches In the fast-paced, high-intensity combat sport of boxing, the right punch can win a fight. However, boxing is also a sport where opponents can become exhausted in mere minutes of action, and prioritizing their strength is key to winning a fight. This team recorded EMG on test […]

Read All
Request a Demonstration
Request a Demonstration