7.2 Repair and Servicing
133
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• Output values seem
too high
• Perform the same checks as for display values.
• Is the output selection (REC or MON) correct?
❖
See "Output Settings" (page 54)
•
or
appears on
the bar graph
• During peak current measurement, indicates negative or positive
over-range occurrence.
❖
• A + or - sign blinks
when an integral is
displayed
• During integration, indicates over-range measured current at the
indicated polarity.
❖
See page 74
• The displayed value
is unstable
• The value may be unstable for waveforms that lack a consistent
period.
Using the MON output, confirm that the current load to be mea-
sured is stable.
• Are the sensor cable and other cables making good contact?
• Are you trying to measure the frequency of a non-sinusoidal
waveform (such as from an inverter)?
In some cases, frequency measurement of non-sinusoidal wave-
forms may not be possible. Verify the waveform on the MON out-
put.
• Does the selected display update rate (measurement response
time) suit the frequency of the current to be measured?
❖
See Section 5.3 "Measurement Response Time" (page 92)
• The 3290-10 turns
off and data cannot
be viewed
• Data may be stored by the Data Save function. Use the Data
Recall function to view saved data.
❖
See Section 5.9 "Recalling Stored Data" (page 102)
• The time display
remains 00:00
• Is
START
displayed?
• If
TIME
is displayed and ":" blinks, less than one minute has
elapsed since starting measurement. The same condition occurs
between 100 hours, 0 min and 100 hours, 1 min. During this
period, the bar graph indicates 100 hours. Pressing the
button displays the number of
100
’s.
Symptom
Items to Check
• When APS (auto power-off) is effective, the unit is automatically
shut down when no button is pressed for about 10 minutes.
❖
See Section 5.11 "Auto Power-off Enabled" (page 103)
• Hold down
button and turn the power on. The indication
“
” and version of software then appear on the LCD.
• The LCD is easiest to read when viewed from the front. When
viewed from directly above, the darkness of the display may appear
uneven, but this is not indicative of a problem.
Содержание 3290-10
Страница 1: ...CLAMP ON AC DC HiTESTER INSTRUCTION MANUAL 3290 10...
Страница 2: ......
Страница 6: ...iv Contents...
Страница 14: ...8 Usage Notes...
Страница 42: ...36 2 5 Turning Power On and Off...
Страница 54: ...48 3 6 Measuring Duty by Timer...
Страница 149: ...4 5 6 7 8 9 10 11...
Страница 150: ......