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 move 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 not
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 necessa ry) using the amplifier MANUAL BALANCE controls.
WARNING. Do not clamp the TCP305 or TCP312 current probes around
uninsulated wires. Damage to the probe or personal injury may result. Only use
the TC
P305 or TCP312 current probes on INSULATED wires.
The TCP303 and TCP404XL curre nt probes can be used to measure current on
unin
sulated wires. However, the circuit must be de-energized when connecting or
removing the current probe.
12 TCPA300/400 Amplifiers and TCP300/400 Series Current Probes User Manual
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