TOS93 Series User’s Manual 23
Safety Precautions for Testing
Protection Functions
When one or more protection function activation conditions are met, the protection function will be
activated, and you will no longer able to perform test in this state (PROTECTION mode).
When a protection function is activated, the word “PROTECTION” is indicated on the display along with
the type of protection. If a PROT
ECTION mode occurs during a test, the output is shut off and the test is
stopped immediately. If a leakage current (LC) test is in progress on the TOS9303LC, the power supply to
the EUT is stopped, and the A and B terminals are opened.
Use the following table to check the type of protection function, activation condition, and remedy, and
rele
ase PROTECTION mode. The text inside the parentheses in the “Type of protection” column is
displayed in the list of test results (p.253).
Type of protection Activation condition Remedy
Interlock
(ILOCK)
Interlock is activated. Release the interlock (p.239).
Power Supply
(PS)
There is an error in the power supply section. Pressing STOP releases the
PROTECTION mode, but the
product needs to be repaired.
Contact your Kikusui agent or
distributor.
Output Error
(OUTERR)
An output voltage outside of the following range is
detected.
ACW, DCW, IR, PD test: ±(10 % of setting + 50 V)
EC test: ±(10 % of setting + 2 A)
This error may also occur when the output
changes suddenly.
Eliminate the cause of the error, and
press STOP.
Over Load
(OL)
An output power or output current outside of the
following range is detected.
ACW: 550 VA, DCW: 110 W or 50 mA,
IR (7200 V test): 110 W or 25 mA,
IR (-1000 V test): 2 mA, EC: 240 VA,
LC: AC LINE OUT current at approx. 15.7 A or
power at 1 600 VA
Eliminate the cause of the error, and
press STOP.
(TOS9303LC only) Disconnect the
EUT from AC LINE OUT, and press
STOP.
Over Heat
(OH)
The internal temperature of the product is
abnormally high.
Confirm that the internal temperature
of the product has decreased, and
then press STOP.
Over Rating
(OR)
During a withstanding voltage test, an output
current is generated for a length of time that
exceeds the output time limit
(p.82).
Press STOP, and wait the necessary
rest time.
Calibration
(CAL)
The preset calibration period is exceeded. Setting Protection Keep under
Calibration (p.263) to Disable and
pressing STOP releases the
PROTECTION mode, but the
product needs to be calibrated. To
have your product calibrated, contact
your Kikusui agent or distributor.
Type of protectionType of protection
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