Kikusui TOS5301 - Precautions after Output Has Been Turned Off

TOS5300 31
3
Safety Precautions
Remote Control Precautions
When you are controlling the TOS5300 Series remotely, external signals are used to turn the high
voltage on and off. To prevent accidents, follow the safety measures given below.
● Make sure that high voltages are not generated unintentionally.
● Make it impossible to touch the DUT, test leads, test probes, and the areas near the
output terminals when high voltages are being generated.
Precautions after Output Has Been Turned Off
During DC withstanding voltage tests and insulation resistance tests, the DUT, test leads, test
probes, and the area around the output terminals are all charged to a high voltage. After the output
has been turned off, be sure to check the following before you touch the items that have been
charged to a high voltage, such as the withstanding voltage DUT, the test leads, the test probes,
and the areas near the output terminals.
● The TEST and DANGER LEDs are both off.
● The analog voltmeter is indicating “0.”
Discharge approximations
The time required to discharge the built-up electrical charge varies according to the test voltage
and the properties of the DUT. When the TOS5300 Series is not connected to an DUT, the time that
the tester requires to discharge the voltage from its internal capacitors down to 30 V is shown
below.
If the TOS5300 Series is connected to a 0.05 μF capacitor as an DUT, the time required to discharge
the voltage down to 30 V is shown below.
W ARNING
Possible electric shock.
• For a short time after the output has been turned off, do not touch the items that have
been charged to a high voltage, such as the DUT, the test leads, the test probes, and the
areas near the output terminals.
• After the output has been turned off, the internal discharge circuit goes into operation and
discharges the output voltage. During testing and before this discharge completes, do not
disconnect the tester from the DUT.
OUTPUT
DANGER
T
OS5
300
ACW
AC WITHSTANDING
VOLTAGE TESTER
0
Off
Off
Zero indication
TOS5300 TOS5301 TOS5302
DC withstanding voltage test
—
Approx. 8 ms —
Insulation resistance test (IR) — — Approx. 1.3 ms
TOS5300 TOS5301 TOS5302
DC withstanding voltage test — Approx. 45 ms —
Insulation resistance test (IR) — — Approx. 7 ms