Malfunction? First, Investigate - YOKOGAWA 701928 User Manual

Malfunction? First, Investigate.

8
If you are unable to correct problems using the troubleshooting information in
this section, servicing is required and you should contact the dealer from whom
you purchased the instrument.
Description
Cannot measure direct
current (or low frequencies
of up to several hundred
Hz), or the amplitude at
that bandwidth is small.
Cannot adjust to the zero
point.
The amplitudes across all
frequencies are small.
Possible Problem
Power is not ON.
The oscilloscope or other
measuring instrument is
set for AC coupling
The sensor is not locked
(the closing mechanism is
not properly aligned).
The sensor is magnetized.
The zero adjust is out of
range (due to drift or other
causes).
Input of the digital
oscilloscope is 50 Ω
Corrective Action
Turn ON the power.
Set the instrument to DC
coupling.
Lock the sensor.
Demagnetize the sensor, and
try the adjustment again.
Use the probe's zero adjust
trimmer.
Set for 1 MΩ.
IM 701928-01E