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2-22
IM DL350-03EN
2.9 Turning the Power On and Off
French
ATTENTION
Éteindre l’instrument pendant l’enregistrement de données peut endommager le support sur
lequel les données sont stockées. Les données en cours d’enregistrement pourraient être
perdues. Toujours éteindre l’interrupteur d’alimentation après l’enregistrement de données.
Power-on Operation
When the power is turned on, a self-test and calibration start automatically. These take about 30
seconds, and the waveform display screen appears. Check that the instrument has started normally
before you use it.
If the Instrument Does Not Start Normally When the Power Is Turned On
Turn off the power, and check that
• The AC adapter or DC power cord is securely connected.
• The battery pack is installed properly.
• You are holding down the power switch for at least 2 seconds.
If the instrument still does not work properly after checking these items, contact your nearest
YOKOGAWA dealer for repairs.
Note
• After turning the power off, wait at least 10 seconds before you turn it on again.
• It may take a few seconds for the startup screen to appear.
Power-off Operation
When the power switch is turned off, the instrument stores the current settings in its memory. This
means that if you turn the power switch on and begin measurement, the instrument will perform
measurements using the settings from immediately before the instrument was last turned off.
Note
The instrument stores the settings using an internal lithium battery. The battery lasts for approximately five
years when the ambient temperature is 23°C. When the lithium battery voltage falls below a specified value
and you turn on the power, a message (error 901) appears on the screen. If this message appears frequently,
you need to replace the battery soon. Do not try to replace the battery yourself. Contact your nearest
YOKOGAWA dealer to have the battery replaced.
To Make Accurate Measurements
• After turning on the power switch, wait at least 30 minutes to allow the instrument to warm up.
• Perform calibration after the instrument has warmed up. For information on auto calibration, see
section 1.6, “Calibrating the Instrument” in the User’s Manual. If auto calibration is turned on, auto
calibration is executed when you change the Time/div setting or start waveform acquisition.