Basic Operation - GW Instek GCP-300 Instruction Manual

Basic Operation:

Before using the probe, the batteries or specified power adaptor must be
installed. See the battery installation instructions on page11.
WARNING!
Do not clamp the probe onto circuits with voltages greater than 600
VAC. Personal injury or damage to the probe may result.
Always connect the GCP-300 current probe output to the instrument
before clamping onto the circuit under test.
1. First connect the current probe BNC connector to double BNC connection
cable then connect to oscilloscope input. Start by setting the oscilloscope
voltage input channel to DC volts, and the voltage sensitivity scale to 0.1
V/div.
2. Move the OFF/ Range switch to the 10 mV/A or 100 mV/A position to turn
on the probe.
(※The GCP-300 current probe has a green LED power/battery indicator.
If the LED does not light, replace the battery or use specified power
adaptor.)
3. Use the ZERO adjustment to zero or offset the probe output detection of
residual magnetic DC charges.
4. Connect the probe to the
circuit by opening the jaws
and clamping around the
conductor. See Figure 2.
NOTE:
Clamping around both
the "hot" and neutral
wires may give you a
zero reading.
(Remember to unclamp
the probe from the
conductor before
disconnecting it from
your meter or
instrument).
Figure 2. Connecting the GCP-300 current probe.
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