Getting Started
DC Measuremen
ts
To measure DC current, first degauss the probe:
1. Verify that the amplifier and the oscilloscope input coupling are set to DC,
and the input impedance is set to 50 Ω.
2. Lock the probe closed without a conductor passing through it.
3. Adjust the ground reference of the oscilloscope to m ove the trace to the
desired graticule line.
4. Press the amplifier PROBE DEGAUSS AUTOBALANCE button.
The NOT TERMINATED INTO 50 Ω LED is lighted if impedance is n ot
50 Ω. If this is the case, make necessary changes. (For example, use a 50 Ω
termination.)
5. After the degauss/autobalance routine completes, adjust the ground reference
(if necessary) using the amplifier MANUAL BALANCE controls.
WARNING. The current probes can be used to measure current on uninsulated
wires. However, the circuit must be de-energized when connecting or removing
the cu
rrent probe.
TCPA300/400 Amplifiers and TCP300A/400 Series Current Probes User Manual 13
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