Lcd Display And Controls; Name And Function Of Each Part Of Lcd Display - Toshiba LF620F Instruction Manual

7. LCD Display and Controls

7.1

Name and Function of Each Part of LCD Display

The LDC display and infrared switches (hereafter, called "control key") in front of the converter allows
you to view or set various constants such as measured values and parameters.
LCD Display
LF620F
Fig. 7.1 Display section of LF620F
Instructions
The operation principle of infrared switch is to irradiate infrared to the front of control panel and detect
the reflection from finger when operating.
Normal operation is impeded depending on the conditions such as disturbing light from surroundings or
stain attached to the control panel. When unable to avoid such condition, operate the EMF converter in the
following manner.
Remove the factor to impede proper operation of infrared switch as below:
・Cover the control panel by hand so that light does not shine on it
・Clean the stain attached on the control panel
・Clean the stain on the finger or the gloves to operate the EMF converter, or wear gloves in light color
・When there is a reflecting object placed opposing to the control panel, stand in-between the reflecting
object and the control panel to block the light
Following are considered as the factors to impede infrared switch to operate properly.
・Intense light such as direct sunlight and reflected sunlight by window glass or metal plate
・Place where brightness changes always such as ON/OFF of lighting
・Dense smoke or steam near the control panel
・Those attached on the control panel such as rain (dew drop), snow, ice, mud and oil, and haze due to
their attachment
・Operation of the control panel by hands wearing gloves in dark color or stained fingers and gloves
・Light reflecting object near the control panel, or reflecting object such as metal plate placed opposing
to the control panel
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LCD Display
Control key
(Control panel)
－ 35 －
LCD Display
LF622F
Control key
(Control panel)
Fig. 7.1 Display section of LF622F
6 F 8 A 0 9 2 8