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5.5 How to Operate the Control Panel
[1] Key Switch ([POWER] key)
Before inserting the power cable into the power outlet, or connecting the BU-24B/BU-24L, be sure
to set the key switch to the OFF position.
Power is turned ON by turning the key switch to the right from the OFF position. The version is
first displayed on the LCD screen, followed by the main screen (preset flow rate). After this, the
LV-40BW can be operated.
When the key switch is turned right from the ON position, the keys are in a locked state. In this
state, the switches on the panel sheet do not operate even if pressed. In this state, the [KEY
LOCK] lamp lights.
When the keys are in a locked state, make sure that the backlight is out.
When canceling the key lock, take care not to turn the key switch to the
OFF position by mistake.
[2] Backlight
Pressing the [BACK LIGHT] key on the panel sheet turns the LCD backlight ON. Pressing the key
again turns the backlight OFF.
When the pump is operating with the BU-24B/BU-24L connected, do not turn
the backlight ON for a long time. The operating time is reduced since the
backlight consumes electricity.
[3] Data Output
Data can be output to a PC or other external device by pressing the [COM] key. For details, refer
to the operation manual for the data output software (Communication cable with software for
LV-250/LV-40B).
The black cap on the RS-232C port can be easily removed by hand. Remove
it only when using the RS-232C interface. When the cap is removed, dust
might get inside the RS-232C port and cause a malfunction. Also, handle the
cap with care not to lose it.
