Tektronix TCP303, Safety Instructions

Page: 22 / 32

Operate the ampli fi er
6. The current probes connect to the TCPA300 and TCPA400 at the PROBE
INPUT connector.
7. The COUPLING button selects AC or DC probe coupling, as indicated by
the LEDs.
8. The RANGE button toggles between the two scale factors that are available
for the attached probe (TCPA300 only). LEDs indicate the selected range.
LED indicators
Indicators Function
PROBE OPEN When lit, this LED indicates that the current probe is unlocked. You
must have the probe slide locked to degauss the probe or to accurately
measure current.
CAUTION: To reduce risk of
fi re when using bare conductors, ensure
that the probe slide is locked before you apply power to the circuit.
OVERLOAD When lit, this LED indicates different overload conditions. (See page 19,
Overload conditions .)
NOT
TERMINATED
INTO 50
Ω
When lit, this LED indicates that the TEKPROBE Interface able or BNC
cable from the OUTPUT of the ampli
fi er is not connected to a 50 Ω input
on the oscilloscope. Switch the termination setting on the oscilloscope
to 50
Ω , or use a 50 Ω termination on the oscilloscope input.
NOTE. NOT TERMINATED INTO 50
Ω is only detected during the
DEGAUSS AUTOBALANCE operation.
NONCOMPATIBLE
PROBE TYPE When lit, this LED indicates that the probe that is connected to the
ampli
fi er is not designed to work with the ampli fi er. TCP3XX probes
only work with the TCPA300 Ampli fi er, and the TCP404XL probe only
works with the TCPA400 Ampli fi er.
18 Ampli fi ers and Current Probes Compliance and Safety Instructions