3-9
IM 760401-01E
Before Starting Measurements
3
3.6 Turning ON/OFF the Power Switch and
Opening Message
Points to Check before Turning ON the Power
• Check that the instrument is installed properly (see section 3.2, “Installing the
Instrument”).
• Check that the power cord is connected properly (see section 3.5, “Connecting the
Power Supply”).
• Is the circuit under measurement wired properly (see sections 3.7, “Directly Wiring the
Circuit under Measurement”, 3.8, “Using an External PT or CT to Wire the Circuit
under Measurement,” and 3.9, “Using an External Sensor to Wire the Circuit under
Measurement.”
Location of the Power Switch
The power switch is located in the lower left corner of the front panel.
Turning ON/OFF the Power Switch
The power switch is a push button. Press the button once to turn it “ON” and press it
again to turn it “OFF.”
OFF ON
Power Up Operation
A test program starts when the power switch is turned ON. The test programs checks
various memories. If the test result is normal, an opening message as shown on the
next page appears, and the WT210/WT230 is ready to make measurements.
If an error code remains on the display after the test program terminates, the WT210/
WT230 will not operate properly. Turn OFF the power switch immediately and contact
your nearest YOKOGAWA dealer. When contacting your dealer, please give them the
model name, suffix code, and instrument No. written on the name plate on the side panel
and the displayed error code.
Note
• If an error code appears, check the information in section 15.4, “Error Codes and Corrective
Action” and perform the appropriate action.
• The warm-up time required to satisfy all specifications is approximately 30 minutes.
Shutdown Operation
The setup parameters that exist immediately before the power switch is turned OFF are
stored in memory. The same is true when the power cord gets disconnected from the
outlet. The next time the power switch is turned ON, the instrument powers up using the
stored setup parameters.
Note
A lithium battery is used to retain the setup parameters. If the lithium battery is low, error
codes 60, 68, and 78 that indicate backup data failure (see section 15.4, “Error Codes and
Corrective Actions”) appear when the power switch is turned ON. If these error codes appear
frequently, the lithium battery must be replaced quickly. The user cannot replace the battery.
Contact your nearest YOKOGAWA dealer to have the battery replaced. For information
regarding battery life, see section 15.6.
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