Vernier Software and Technology
Vernier Software & Technology
Tech Info Library

Go Direct Current Probe Troubleshooting and FAQs

Go Direct® Current Probe, order code GDX-CUR, $74
Specifications and User Guide

TROUBLESHOOTING
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.

RELATED ARTICLES
TIL 1026: 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?
TIL 1139: How can I measure currents outside the range of the Vernier Current Probe?
TIL 1973: How do I measure currents larger than 0.6 amperes?

SPECIFICATIONS
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)

CALIBRATION
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.

RELATED VERNIER PRODUCTS
Go Direct® Voltage Probe, order code GDX-VOLT, $69
Vernier Circuit Board 2, order code VCB2, $129

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