14.2 Trouble Shooting
217
Chapter 14 Maintenance and Service
14
Before returning for repair
Perform a system reset.
This will return all settings to their factory defaults.
See: "5.6 Initializing the Instrument (System Reset)" (p.73)
Before having the instrument repaired
Symptom Check Item, or Cause Remedy and Reference
The display does
not appear when
you turn the power
on.
Has the power cord been disconnected?
Is it connected properly?
Verify that the power cord is connected
properly.
See: "3.4 Connecting the AC Adapter" (p.32)
Keys do not work. Has the key lock been activated? Press and hold the ESC key for at least 3
seconds to cancel the key lock.
Cannot print. Has recording paper been properly loaded into
the printer?
Is the printer configured properly (baud rate,
interface, etc.)?
Is the instrument connected to the printer with
the appropriate cable?
-
Voltage or current
measured values
are not being dis-
played.
Are the voltage cords or clamp sensors con-
nected improperly?
Verify connections.
See: "3.6 Connecting the Voltage Cords" (p.34)
to "4.6 Verifying Correct Wiring (Connec-
tion Check)" (p.48)
Are the input channels and display channels
incorrect?
-
The instrument can-
not measure the fre-
quency.
Measured values do
not stabilize.
Is the input frequency within the guaranteed
accuracy range?
For a measurement frequency of 50 Hz, 40 to 48
Hz
For a measurement frequency of 60 Hz, 51 to 70
Hz
For a measurement frequency of 400 Hz, 360 to
440 Hz
Measurement cannot be performed if the input
frequency is outside the guaranteed accuracy
fundamental wave range.
-
Is the input frequency lower than the setting?
Is a signal being input to U1?
Stable measurement may not be possible if input
of at least 2% f.s. is not being supplied to U1 (the
reference channel).
When no apparent cause can be established
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