Operation and Service Guide 1
Keysight E4412A and E4413A Operating and Service Guide 37
Troubleshooting
Troubleshooting information is intended to first isolate the power sensor, the
cable, or the power meter as the defective component. When the power sensor is
isolated, a “Restored Sensor Module” must be used for repair. See Table 1-7.
If error message
241 or 310 is indicated on the power meter, suspect failed power
sensor. If no error message is displayed, but a problem occurs when making a
measurement, try replacing the cable from the power meter to the power sensor.
If the problem still exists, try using a different power sensor to determine if the
problem is in the power meter or in the power sensor.
The maximum measurable power of a power sensor varies depending on the
sensor model. Incidentally, Keysight Technologies’ service centers receive a high
number of power sensor that have been damaged due to overpowering of the
sensor bulkhead, resulting in the damage of the internal thin film circuit.
Subjecting a power sensor module above its maximum allowable power rating is
considered a misuse or self-abuse and is excluded from Keysight Technologies’
standard warranty coverage.
Refer to the Power Sensor Overpower Failure Verification Guideline at
https://literature.cdn.keysight.com/litweb/pdf/5992-4039EN.pdf
Repair of defective sensor
There are no serviceable parts inside the E44XX-Series sensors. If the sensor is
defective, replace the entire “module” with the appropriate “Restored sensor
Module.” See Table 1-7.
Electrostatic discharge will render the power sensor inoperative. Do not,
under any circumstances, open the power sensor unless you and the power
sensor are in a static free environment.
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