3-6 IM 701450-01E
Turning ON/OFF the Power Switch
CAUTION
If you turn ON/OFF the DL7400 while a Zip disk is inserted in the drive, the Zip
drive may malfunction. Remove the Zip disk from the drive before turning ON/
OFF the DL7400.
Items to Be Checked before Turning ON the Power
The instrument is properly installed.
See section 3.2, “Installing the Instrument” (page 3-3).
The power cord is properly connected.
See section 3.3, “Connecting the Power Supply and Turning ON/OFF the Power Switch” (page 3-5).
Turning ON/OFF the Power Switch
The power switch is located in the lower left corner of the front panel. The power switch
is a push button. Press once to turn it “ON” and press again to turn it “OFF.”
OFF ON
Power Up Operation
Self-test and calibration start automatically when the power switch is turned ON. If the
check results are satisfactory, the normal waveform display screen will appear.
Note
• Allow at least 10 s when turning ON the power switch after turning it OFF.
• If self-test and calibration do not start when the power is turned ON, or if the normal waveform
display screen does not appear, turn OFF the power switch and check the following points.
• That the power cord is plugged in properly.
• That the correct voltage is coming to the power outlet (see page 3-5).
• That when the power is turned ON while holding down the RESET key, all settings
excluding the date/time setting (display ON/OFF is initialized) are initialized to their factory
defaults. For details on the initialization of the settings, see section 4.4.
If the instrument still fails to power up when the power switch is turned ON after checking these
points, contact your nearest YOKOGAWA dealer.
Warm Up and Calibration
• To ensure accurate measurements, allow the instrument to warm up for at least 30 minutes
after turning ON the power switch.
• After warm-up is complete, perform calibration (see section 4.6).
Power Down Operation
Current settings are stored immediately before the power is turned OFF or when the
power cord is unplugged. Therefore, the next time the power is turned ON, the
waveforms are displayed using the previous settings.
Note
A lithium battery is used to retain the setup parameters. When the lithium battery voltage falls below
a certain level, a message is displayed on the screen (see section 16.2) when the power switch is
turned ON. If this happens, you must quickly have the lithium battery replaced. The user cannot
replace the battery. For battery replacement, contact your nearest YOKOGAWA dealer. For
information regarding battery life, see section 16.5.
3.3 Connecting the Power Supply and Turning ON/OFF the Power Switch
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