3-1
IM 707231-01E
T
roubleshooting and Maintenance
3
3.1
Troubleshooting
• If servicing is required, or if the instrument is not operating correctly after performing
the corrective actions listed below, contact your nearest YOKOGAWA dealer as listed
on the back cover of this manual.
• To verify that the module is operating correctly, perform the self test described on the
next page.
Problem
Possible Causes/Corrective Actions
Reference Page
Module does not operate.
Check that the module is installed correctly into the station.
2-1, *
Also, install the module into another slot, and check whether it will
operate there. If it operates in the other slot, the measuring station is
likely to have malfunctioned.
If the module is installed correctly and does not operate, the fuse might
have melted, the connector might be bad, or the IC may have
malfunctioned.
In any case, contact your nearest YOKOGAWA dealer to have it repaired.
Waveform data cannot be
Check that the input signal wires are connected properly.
2-3 to 2-6
acquired.
Also check the connection between the 30-CH Scanner Box and
the module.
Noise enters the input signal
If the signal line and the AC power supply line are close to each other,
2-3
move them apart. Also make sure that the signal line is away from the
noise source.
Change to a shielded signal wire if you are not already using one.
2-3
Measured values are not correct.
Check that the ambient temperature and humidity are within the
4-5
allowed ranges. If you did not allow a warm-up time of 30 minutes,
try measuring again after the warm-up time has passed.
Check to see that the input signal level is not exceeding the
4-1, 4-2
measurement range.
Temperature measurement is not
Check that the RJC setting is correct.
1-3, 1-5
correct.
Check whether the thermocouple type and polarity are set properly.
Check to see that the thermocouple is not burnt out after clicking the
Exec button under Burn Out.
Check whether the terminal cover for the 30-CH Scanner Box is
2-5
attached.
Check to see that there is no draft in the area where the instrument is
located that might cause significant changes in temperature.
Check to see that the two types of thermocouple wires are not too far
apart, the tip is not touching a metal object, and that the thermocouple
is being handled properly.
Check to see that the input signal level from the object being measured
is within the measurement range.
The displayed waveform does not Check whether the measurement has been started on the operation
1-3
get updated.
panel.
Check whether the sampling interval is set properly on the operation
1-6
panel.
The waveform is not displayed.
Check whether measurement has been started on the operation panel. 1-3
If the time base setting is BUSCLK, check to see that the time base
1-6, *
source is set properly in the Trigger Source/Time Base Source/Arming
Setting dialog box of the WE7000 Control Software.
Check to see that the input signal level from the object being measured
is within the measurement range.
The waveform monitor is not
Check that the waveform monitor ON/OFF button located to the right of 1-3
displayed.
the Start button on the operation panel is turned ON.
* See the WE7000 User’s Manual (IM707001-01E).
Chapter 3 Troubleshooting and Maintenance
