Service 4
Keysight E-Series E9300 Operating and Service Guide 55
If error message 241 or 310 is indicated on the power meter, suspect a 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.
Repair of defective sensor
There are no serviceable parts inside the Keysight E-Series E9300 power sensors.
If the sensor is defective, replace the entire “module” with the appropriate
“Restored Sensor Module.”
Disassembly procedure
Disassemble the power sensor by performing the following steps:
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.
Disassemble the power sensor only in a static free workstation. Electrostatic
discharge will render the power sensor inoperative.
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