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
response and stimulus device

Chronos for BIOPAC

The Chronos®  USB-based response and stimulus device features millisecond accuracy in the areas of stimulus, response, sound output, and external device communication—this level of timing accuracy cannot be achieved using a keyboard, mouse, or onboard sound card. Chronos also gives users a solution for communicating with external devices (up to 16 digital inputs and outputs) […]

View All
Latest News

Alan Macy Honored as Local Hero

“Alan Macy: Scientist, Entrepreneur, and Visionary Community Builder” The Santa Barbara Independent honored Alan Macy as a Local Hero. “What makes Macy a Santa Barbara Independent Local Hero is the combination of vision, generosity, and persistence he has shown in bringing creative people together and in crafting innovative venues for them to collaborate. …For this, and for his […]

BIOPAC Releases New BioNomadix Smart Center System

Good quality data is important for reliable physiological research. No longer restrained to wires or stationary devices, BIOPAC’s newly released Smart Center is a lightweight and compact system designed to acquire quality data. The portable, wireless device offers high fidelity physiological data, allowing for subjects to be untethered while being recorded. The system includes the […]

Read All
Request a Demonstration
Request a Demonstration