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1.2 Names and Functions of Parts
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1 2 3 4 5
10 Rubber keys
The seven rubber keys include six function keys and a SHIFT key.
The six function keys offer a variety of settings, used in combination with the
SHIFT key.
11 Output Voltage Knob
Sets the output voltage.
12 Main power switch
Powers the 3158 on or off.
Rubber keys
1 Left/Right cursor key
Moves the flashing cursor. The switching range is preset before shipment:
Preset Comparative voltage value
Upper limit Value Test time.
To display the flashing cursor, press the
/ keys. The cursor appears,
displaying the preset comparative voltage value.
2 Up/Down cursor key
Changes the position at which the flashing cursor appears.
3 ON/OFF key
Switches on/off the set value for the position of the flashing cursor.
However, this key can't perform the switching on/off of the preset Upper level
Value. If turned off, the set value is not used in testing.
4 LOCK key
Used to lock the keys. When pressed, the LOCK key disables all keys except the
START
key,
STOP
key, and Key Lock Cancel key. See 3.2.2, "Key-lock
Function."
5 SHIFT key
Used in combination with other keys.
（
1
）
Displaying the Preset-data loading screen
Press
SHIFT
+ keys to display the Preset-data loading screen. For more
information, see Chapter 5, "Saving/loading the Parameters Set."
（
2
）
Displaying the Preset-data saving screen
Press
SHIFT
+ keys to display the Preset-data saving screen. For more
information, see Chapter 5, "Saving/Loading Preset Values."
（
3
）
Disabling the key lock function
To disable the key lock function, press the
SHIFT
+
LOCK
keys.
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