
3-12
IM 701210-05E
Power Up Operation
Self-test and calibration start automatically when the power switch is turned ON. The
operation takes approximately 30 seconds; 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.
•
Check that the power cord is plugged in properly.
•
Check that the correct voltage is being supplied from the AC outlet. (See the previous
page.)
•
If the power switch is turned ON while the RESET key is pressed, all settings will be
reset to the factory settings. For details, See section 4.4, “Initializing Settings.”
If the instrument still fails to power up when the power switch is turned ON after checking these
points, contact your nearest YOKOGAWA dealer.
•
If you repeat the operation of turning the power switch ON and OFF on the optional DC
power supply model, the DL750/DL750P will stop supplying power due to the tripping of
the internal protection function. If you stop the operation of turning the power switch ON
and OFF for 10 to 20 seconds, the internal protection function is cleared, and the DL750/
DL750P starts supplying power again. The DC power supply LED illuminates in orange
while power is not being supplied.
•
It may take a few seconds for the startup screen to appear.
For 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). If the auto
calibration is turned ON, the calibration is automatically executed when the T/div
setting is changed or when the waveform acquisition is started.
Power Down Operation
Settings made prior to turning OFF the power are retained (even if the power cord is
removed). This allows display of waveforms using those saved settings the next time the
power is turned ON.
Note
The settings are stored using an internal lithium battery. The battery lasts for approximately 5
years if it is used at an ambient temperature of 23
°
C. When the lithium battery voltage falls
below a specified level, a message is displayed on the screen (error 907) when the power
switch is turned ON. If this message appears frequently, the battery must be replaced
quickly. The user cannot replace the battery. For battery replacement, contact your nearest
YOKOGAWA dealer.
3.4 Connecting the Power Supply