Go Direct® Current Probe (GDX-CUR)
Specifications and User Guide

Primary Test: Connect the probe a device via Bluetooth or USB and start the data collection software. Connect the probe’s wire leads to a DC supply in series with a known resistance. Use a voltage probe or voltmeter to measure the voltage of the supply. Compare the measured current against the current calculated from Ohm’s Law. We recommend a battery for this test, since some DC power supplies may not deliver clean DC voltage.

The readings from my Current and/or Voltage Probe are erratic, but if I measure the voltage with a multimeter instead, I get a solid reading. What is wrong with my sensor?
How can I measure currents outside the range of the Vernier Current Probe?
How do I measure currents larger than 0.6 amperes?
Is the Go Direct Current Probe protected against short circuits?

Ranges: +/-1 A and +/-0.1 A
Maximum voltage on any input: +/-10 V
Maximum non-damaging current: 1.5 A and 0.5 A
Input impedance (between inputs): 0.1 Ω
Input impedance (to ground): 10 MΩ
Linearity: 0.01%
Resolution: 0.031 mA (+/-1 A range) and 0.003 mA (+/-0.1 A range)
Battery: 300 mA Li-Poly
Battery life (single full charge): ~24 hours
Battery life (long term): ~500 full charge cycles (several years depending on usage)

The Go Direct Current Probe cannot be calibrated. However, you may consider “zeroing” the sensor before the start of an experiment. This is done by shorting out the leads of the sensor, then choosing the Zero option in the data-collection software.

Go Direct® Voltage Probe (GDX-VOLT)
Vernier Circuit Board 2 (VCB2)