16-2
IM CW240E
16.1 Things to Check When There
is a Malfunction
This section describes how to handle problems that may arise with the CW240.
If the CW240 does not operate correctly even after checking the items listed
below, or if there is a problem not covered here, please contact a service
representative listed on the back cover.
If an error message has been displayed on the display screen, refer to Section
16.2, Error Message Content and Actions.
Symptom Things to Check
Reference Section
1)
Nothing is displayed
when the power
switch is turned ON.
2)
Setting data is
initialized when
power is turned
OFF
3.2.1
3.2.1
When using AC power
• Confirm that the power cord is connected to the
outlet correctly.
• Confirm that the power supply is within the
allowable power supply voltage range.
3.2.2
3.2.3
When using battery power
• Confirm that the battery case is correctly installed.
3.2.3
• If a NiMH battery pack is being used, confirm that
the battery has been sufficiently charged.
3.2.2
• If an alkaline dry cell is being used, confirm that
the battery has not dissipated. (Confirm that the
battery is installed with correct polarity.)
3.6
—
• If the opening messages "RTC Initialized" and
"Settings Initialized" are displayed when power is
turned ON, the backup battery has become
dissipated. Backup batteries cannot be replaced
by the customer.
Contact a service representative.
The lifetime of the backup battery is
approximately 10 years.
3)
The measurement
display value is
incorrect.
• Check for the possibility of noise on the input
signal.
3.3
3.4
• Confirm that the measurement probe and clamp
are connected correctly.
6.3.2
6.3.3
• Confirm that the frequency measurement element
has been set correctly.
4.2
• Confirm that the ambient temperature/humidity
are within the specification's allowable range.
Chapter 16 Maintenance Troubleshooting
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