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Table 9-3 Actions When a Failure is Suspected (Continued)
Category
Symptom
Output-related
The measured
problem
voltage is
different from
the setting
value.
An error
message is
displayed.
Measurement
The measured
function-related
voltage or
problem
current is not
displayed
correctly.
The measured
value is
displayed as
"----".
The measured
value
fluctuates.
DP060LM/DP120LM/DP180LM
Possible Cause
The waveform is
In the specified clip ratio mode, the
set to CLP
output voltage setting means a value for
(clipped sine
the waveform before being clipped. To
wave) and the
set a value for the clipped waveform, set
Type is set to
the Type to the specified crest factor
mode (Type: CF). 4.6
Clip (specified
clip ratio mode).
The protection
Connect a load within the maximum
function was
output range or decrease the output
activated due to
voltage setting.
overload.
Excessive signal
When the signal source is EXT or ADD,
level of the
lower the level of the connected signal
signal generator.
generator or decrease the external input
gain.
The ambient
Decrease the ambient temperature when
temperature is
using the product. The maximum current
high.
may decrease over 40 °C.
Clean the air filters by referring to 10.2.
Air filters are
clogged.
Around the front
Install the product so as to satisfy the
panel air inlet or
installation conditions described in 2.2.
rear panel air
outlet, there is
something
blocking the air
flow.
The display
Select RMS for AC. Otherwise, the
selection is not
correct value is not displayed.
right.
It is out of the
Set the synchronization signal source
synchronization
frequency to a value within the
frequency
synchronization frequency measurement
display range. 11.12
measurement
display range.
The signal source
In EXT, the measurement cycle is fixed,
is set to EXT.
and thus the difference from the external
signal cycle may fluctuate the measured
value. On the other hand, in the ADD
mode, the appropriate measurement cycle
is decided according to the internal signal
source frequency setting. Therefore, if
you know the frequency of the external
signal to use, change the signal source to
ADD, set the internal signal source
frequency to the external signal
frequency, and set the internal signal
source output voltage to zero. 4.20
A low frequency
For a frequency lower than 10 Hz, the
(less than 10 Hz)
measurement cycle is a fixed value and
is set.
thus the measured value may not be
stable.
9.2 When a Failure is Suspected
Necessary Actions
237
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