Tektronix TCPA300 SERIES User Manual

Reference Notes
3-10
TCPA300/400 Amplifiers and TCP300/400 Series Current Probes Instruction Manual
Increasing Sensitivity
If you are measuring DC or low-frequency AC signals of very small amplitudes,
you can increase measurement s ensitivity of your Current Probe by winding
several turns of the conductor under test around the probe as shown in
Figure 3--6. The signal is multiplied by the number of turns around the probe.
WARNING. Do not put more than one uninsulated conductor at a time in the
probe jaws. An uninsulated conductor is defined as any conductor without
insulation or without insulation rated for the voltage present on the conductor
under test.
When viewing the signal on the oscilloscope screen, divide the displayed
amplitude by the number of turns to obtain the actual current value. For example,
if a conductor is wrapped around the probe five times and the oscilloscope shows
a reading of 5 mA DC, the actual current flow is 5 mA divided by 5, or
1mADC.
NOTE. Winding multiple turns around the probe increases insertion impedance
and reduces the upper bandwidth limit of the probe.
Extra turns for
increased sensitivity
Conductor
under test
Current probe
Figure 3- 6: Increasing probe sensitivity

Tektronix TCPA300 SERIES Specifications

General

Brand	Tektronix
Model	TCPA300 SERIES
Category	Amplifier
Language	English