Kikusui TOS6200A, User Manual, Page: 66 / 154

4-32 Basic Operation TOS6200A/6210
4.8 Key Lock
The key lock function protects accidental changing of the test conditions.
Press the SHIFT + LOCAL/KEY LOCK key combination (pressing the LOCAL
key with the SHIFT key held down) to lock the panel settings.
In this case, only the START and STOP switches are available on the front panel.
When key lock is in effect, "KEY LOCK" is indicated on the LCD. To cancel key
lock, press the SHIFT + LOCAL/KEY LOCK keys again.
4.9 Checking the Test Conditions
This tester checks if the values set as the test conditions are valid or not. If an invalid
value is set, the tester displays the cause of it on the LCD, informing you that testing
cannot be conducted unless it is changed.
The following four causes are displayed:
LCD Indication in
the Event of Invalid Setting
Cause of Invalid Value
OVER VOLT
Setting of output out of the operation range OVER VA
OVER RESI
UP <= LOW
Upper reference value

lower reference value
KEY LOCK
25.0
A
0.100 60.0
s
MAIN MAIN
FREQ LOWER OFF OFFSET OFF TIMER ON
READY
50Hz
UPPER