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Current Probe Troubleshooting and FAQs

About this FAQ

  • Created May 6, 2005
  • Updated May 29, 2014
  • Article #1407

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Current Probe, order code DCP-BTA, $39
Specifications and User Guide

TROUBLESHOOTING
Primary Test: Plug the probe into an interface and run the data collection program. Use wire leads to connect the probe 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 Ohms Law. We recommend a battery for this test, since some DC power supplies may not deliver clean DC voltage.

RELATED TIL ENTRIES
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 1351: What is the overvoltage protection on the Differential Voltage Probe and Current Probe?
TIL 1973: How do I measure currents larger than 0.6 amperes?
TIL 2110: How do I tell if a Current Probe is damaged?
TIL 1855: My Current Probe auto-IDs as a different sensor on LabQuest.

SPECIFICATIONS
-new order code: DCP-BTA
-old order code: none (use CV-DIN)
-Current Probe Range: +/-0.6A
-Maximum Voltage on any input: +/-10 V
-Input Impedance (between inputs): 0.1Ω
-Input Impedance (to ground): 10 MΩ
-Linearity: 0.01%
-Resolution, 10-bit (CBL, CBL 2, original ULI): 1.25 mA
-Resolution, 12-bit (LabPro, Go! Link, ULI II, Serial Box): 0.31 mA
-Supply Voltage: 5 VDC
-Supply Current (typical): 9 mA
-Output Voltage Range: 0 to 5 V
-Transfer Function: Vout = -4(I) = 2.5

CALIBRATION
-Calibrate? No. The probe is set to match the stored calibration before shipping.
-If you choose to calibrate the probe, conduct a two-point calibration using two known currents.
-You may also zero the probe by shorting out the leads and then choosing the Zero option in the data collection program. If you zero the probe, it will adjust the calibration offset but does not adjust the calibration gain.

RELATED VERNIER PRODUCTS
Differential Voltage Probe, order code DVP-BTA, $39

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