Kikusui TOS5050A, Руководство по эксплуатации

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TOS5051A/5050A 4-11
Chap
.4
Descr
iption of F
ront and Rear P
anel Items
[15] TIMER ON/OFF key
The ON/OFF key turns ON or OFF the timer function.
If you press the key while holding down the SHIFT key, the keylock function is
turned ON or OFF.
1. When the ON/OFF key alone is pressed
Each time you press the key, the timer function is turned ON or OFF. If you
press it while the “TIMER ON” message is OFF, the timer function is turned
ON and the “TIMER ON” message appears. The test done under this condition
terminates when the test period indicated on the TIME display elapses.
When you press the ON/OFF key again, the timer function is turned OFF and
the “TIMER ON” message disappears. In this status, the test does not termi-
nate even when the test period indicated on the TIME display elapses. If the
timer function ON during the test, the TIME display indicates the remaining
period; if the timer function OFF, the TIME display indicates the elapsed
period.
The ON/OFF key is enabled when the tester is in the READY status
(“READY” is lit) and the “KEYLOCK” message is OFF. It is disabled when
the tester is in the TEST-ON status (“TEST” is lit) or when the tester is deliver-
ing the result of PASS/FAIL judgment (When “PASS” or “FAIL” is lit).
On the TOS5051A, the ON/OFF key is used to turn ON or OFF the timer func-
tion for both AC and DC test modes. This test condition applies to both AC and
DC test modes.
2. When ON/OFF key is pressed while holding down the SHIFT key
If you press the ON/OFF key while holding down the SHIFT key, the below-
mentioned keys are locked and the “KEYLOCK” message appears or they are
unlocked and the message disappears. If you press them again, the below-men-
tioned keys are unlocked and the “KEYLOCK” message disappears.
When the keylock function is ON, the following keys are locked.
(a) CUTOFF CURRENT keys
(b) CUTOFF CURRENT UP/LOW key
(c) TIMER keys
(d) TIMER ON/OFF key
Therefore, the following conditions of test can be protected against inadvertent
or unauthorized alterations
(a) Upper cutoff current
(b) Lower cutoff current
(c) ON/OFF of lower pass/fail judgment function
(d) Test time
(e) ON/OFF of timer function
If you press the ON/OFF key again while holding down the SHIFT key, the
keylock function is OFF and the “KEYLOCK” message disappears.
The ON/OFF key is enabled regardless of the status of the tester.
On the TOS5051A, the keylock function applies to both AC and DC mode
tests.