TOS9213S/ TOS9213AS
A-1
Ap
pen
dix
Appendix
Appendix describes the operating principle of the tester and ASCII code table (20H
to 7EH).
A.1
Operating Principle
Fig.A-1
TOS9213S/ TOS9213AS
b
lock diagram
[1] Reference-voltage generation circuit
Generates a reference voltage corresponding to the test voltage in DC withstanding
voltage testing and insulation resistance testing. During the preset voltage rise time
(RISE TIME), the reference voltage increases from zero to the preset test voltage,
exerting little transient voltage stress on the DUT.
[2] 10 kV DC/DC converter
The high-voltage generation circuit for DC withstanding voltage testing. At an out-
put of 10 k
V
, the converter enhances the output from the reference-voltage genera-
tion circuit by approximately 300 times to obtain 1.25 k
V
. Further, it achieves 10
k
V
DC in the 4-time Cockcroft and Wolton circuit. The converter realizes a low-rip-
ple stable test voltage of up to 10 k
V
(maximum rated power of 50 W) with a volt-
age regulation of 1 % or less.
START/STOP
Control
circuit
BUZZER
LCD/LED
KEY
REMOTE
SCAN I/F
SIGNAL I/O
STATUS OUT
Interlock
GPIB
RS-232C
Reference-voltage
generation circuit
10 kV DC/DC
converter
1 kV DC/DC
converter
Judgement
circuit
Discharge
circuit
IR
voltmeter
Voltmeter
Current
detection circuit
AC line
[10] POWER SUPPLY
GUARD
LOW
IR
DCW
LOW
H.V
[9]
[1]
[2]
[4]
[8]
[5]
[7]
[6]
[3]
