Vernier Current Probe manual

Vernier Current Probe
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manualVernier Current Probe

Current Probe

(Order Code DCP-BTA)

The Current Probe is designed for exploring the basic principles of electricity. Use
the Current Probe to measure currents in low voltage AC and DC circuits. With a
range of 0.6 A, this sensor is ideal for use in most “battery and bulb” circuits. Use it
with the Differential Voltage Probe (order code DVP-BTA) to explore Ohm’s law,
phase relationships in reactive components, and much more. Use multiple sensors to
explore series and parallel circuits. It can also be used in electrochemistry

Collecting Data with the Current Probe

This sensor can be used with the following interfaces to collect data.
Vernier LabQuest
2 or original LabQuest
as a standalone device or with a
Vernier LabQuest
Mini with a computer
Vernier LabPro
with a computer or TI graphing calculator
Vernier Go!
Vernier EasyLink
Vernier SensorDAQ
TI-Nspire™ Lab Cradle
Here is the general procedure to follow when using the Current Probe:
1. Connect the Current Probe to the interface.
2. Start the data-collection software.
3. The software will identify the Current Probe and load a default data-collection
setup. You are now ready to collect data.

Data-Collection Software

This sensor can be used with an interface and the following data-collection software.
Logger Pro 3 This computer program is used with LabQuest 2, LabQuest,
LabQuest Mini, LabPro, or Go!Link.
Logger Lite This computer program is used with LabQuest 2, LabQuest,
LabQuest Mini, LabPro, or Go!Link.
LabQuest App This program is used when LabQuest 2 or LabQuest is used as a
standalone device.
DataQuest™ Software for TI-Nspire This calculator application for the TI-
Nspire can be used with the EasyLink or TI-Nspire Lab Cradle.
EasyData App This calculator application for the TI-83 Plus and TI-84 Plus can
be used with CBL 2, LabPro, and Vernier EasyLink. We recommend version 2.0
or newer, which can be downloaded from the Vernier web site,, and then transferred to the calculator. See
the Vernier web site, for more
information on the App and Program Transfer Guidebook.
DataMate program Use DataMate with LabPro or CBL 2 and TI-73, TI-83,
TI-84, TI-86, TI-89, and Voyage 200 calculators. See the LabPro and CBL 2
Guidebooks for instructions on transferring DataMate to the calculator.
LabVIEW National Instruments LabVIEW™ software is a graphical
programming language sold by National Instruments. It is used with SensorDAQ
and can be used with a number of other Vernier interfaces. See for more information.
NOTE: Vernier products are designed for educational use. Our products are not
designed nor 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.


Current Probe range: 0.6 A
Maximum volta
e on an
: 10 V
Input Impedance (between inputs): 0.1
Input Impedance (to ground): 10 M
: 0.01%
it resolution (using SensorDAQ): 0.16 mA
12-bit resolution (using LabQuest 2, LabQuest,
LabQuest Mini, LabPro, Go!
Link, TI-Nspire
Lab Cradle, ULI II, SBI):
0.31 mA
it resolution (using CBL 2): 1.25 mA
Supply voltage: 5 VDC
current (t
pical): 9 mA
Output voltage range: 0
5 V
Transfer function: V
4(I) + 2.5
Current in amperes slope:
0.25 A/V
intercept: 0.625 A
This sensor is equipped with circuitry that supports auto-ID. When used with
LabQuest 2, LabQuest, LabQuest Mini, LabPro, Go! Link, SensorDAQ, TI-Nspire
Lab Cradle, EasyLink, or CBL 2, the data-collection software identifies the sensor
and uses pre-defined parameters to configure an experiment appropriate to the
recognized sensor.

How the Current Probe Works

The Current Probe contains a sensing element and signal conditioning amplifier. The
sensing element is a 0.1 resistor connected between the red and black terminals.
As the current passes through the resistor, a small potential difference is measured
across this resistor. This potential difference is input to the signal conditioning

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