Use our Go Direct Electrode Amplifier to collect data with almost any electrode that has a BNC connector. This includes electrodes from Vernier, such as our pH electrodes, ion-selective electrodes (ISE), or oxidation-reduction potential (ORP) electrode. The Go Direct Electrode Amplifier can produce an output in mV, pH (when using a pH electrode).
Note: Vernier products are designed for educational use. Our products are not designed nor are they recommended for any industrial, medical, or commercial process such as life support, patient diagnosis, control of a manufacturing process, or industrial testing of any kind.
If a pH electrode is attached, a two-point calibration is recommended for the most accurate results. It is a simple process that takes only a few minutes. For additional calibration information, see www.vernier.com/til/4011
In order to calibrate a pH electrode/electrode amplifier combination, or to confirm that a saved pH calibration is accurate, you should have a supply of pH buffer solutions that cover the range of the pH values you will be measuring. For more information about pH buffer solutions, including recipes for preparation, see www.vernier.com/til/3625
Once you have calibrated a Go Direct sensor, the calibration is automatically stored to the sensor and will be used each time you connect to your device. You can always choose to restore factory defaults if you feel the custom calibration is invalid.
If an ORP or ion-selective electrode is connected and you are measuring potential, calibration is not required. Calibration is disabled in this mode to ensure the best results.
Care and Maintenance
Go Direct Electrode Amplifier contains a small lithium-ion battery in the handle. The system is designed to consume very little power and not put heavy demands on the battery. Although the battery is warranted for one year, the expected battery life should be several years. Replacement batteries are available from Vernier (order code: GDX-BAT-300).
Storage and Maintenance
To store Go Direct Electrode Amplifier for extended periods of time, put the device in sleep mode by holding the power button down for at least three seconds. The red LED will stop flashing to show that the unit is in sleep mode. Over several months, the battery will discharge but will not be damaged. After such storage, charge the device for a few hours, and the unit will be ready to go.
Exposing the battery to temperatures over 35°C (95°F) will reduce its lifespan. If possible, store the device in an area that is not exposed to temperature extremes.
Go Direct Electrode Amplifier is not water resistant and should never be immersed in water.
If water gets into the device, immediately power the unit down (press and hold the power button for more than three seconds). Disconnect the sensor and charging cable, and remove the battery. Allow the device to dry thoroughly before attempting to use the device again. Do not attempt to dry using an external heat source.