Tektronix TCP300A, User Manual

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Troubleshooting and Error Codes
For example, after you press the PROBE DEGAUSS AUTOBALANCE button, if
the AC and DC Coupling LEDs are
fl ashing, then an error code is being displayed:
1. In this example, the NOT TERMINATED INTO 50 Ω LED is illuminated.
2. This four-bit binary code (0010) indicates an Error Code 2: a null error in the
DC offset circuit occurred. (See Figure 27.)
Figure 27: Interpreting the error code display
A complete list of error codes for the ampli fi er is listed in the table. (See Table 7.)
Table 7: Ampli fi er error codes
Code Description of error Action to take
1 The ampli fi er detected
a probe, but a valid Hall
device was not detected.
Disconnect and reattach the probe to the ampli fi er.
Power cycle the ampli fi er. Check probe transformer
(defective Hall device). If these steps do not resolve the
error, the ampli
fi er needs service. May also be caused
by a shorted or open wire in the probe cable assembly.
2
3 An error occurred while
nulling out the internal DC
offset of the ampli
fi er.
Power cycle the ampli fi er and run the
Degauss/Autobalance adjustment routine again. If the
error reoccurs, then the ampli
fi er needs service.
4
5 TCPA300 ONLY - An
error occurred while the
ampli
fi er was adjusting
the power supply levels
for the different Range
settings.
Power cycle the ampli fi er and run the
Degauss/Autobalance adjustment routine again. If the
error reoccurs, then perform the following steps:
1) Remove the probe from the circuit.
2) Check probe - The signal path through the probe
transformer may be open or shorted, which can
be caused by defective probe transformer or cable
assembly. If the above steps do not resolve the error,
the ampli
fi er needs service.
6
7 An error occurred
while the ampli
fi er was
adjusting the Overload
trip points.
Power cycle the ampli fi er and run the
Degauss/Autobalance adjustment routine again. If the
error reoccurs, then remove the probe from the circuit.
If this does not resolve the error, the ampli
fi er needs
service.
8
9 Unused
46 TCPA300/400 Ampli fi ers and TCP300A/400 Series Current Probes User Manual