User Manual
    GPT-9000/9000A Series User Manual 
20 
GPT-9904 Rear Panel 
TO  AVOID  ELECTRIC SHOCK THE POWER CORD
PROTECTIVE GROUNDING CONDUCTOR  MUST BE
ONLY  WITH SPECIFIED TYPE  AND  RATED FUSE.
NO  OPERATOR  SERVICEABLE  COMPONENTS  INSIDE.
DO  NOT  REMOVE  COVERS. REFER SERVICING TO 
FOR CONTINUED FIRE  PROTECTION. REPLACE
CONNECTED  TO GROUND. 
QUALIFIED  PERSONNEL.
WARNING
AC
LINE VOLTAGE
100V
230V
220V
120V
SELECTION
207~250V
RANGE
 90~110V
198~242V
108~132V
(50/60Hz)
250V
250V
T 10A
FUSE
T 6.3A
MAX.
1000VA
GND
ENSURE THE POWER IS REMOVED FROM
THE INSTRUMENT BEFORE REPLACING THE FUSE
POWER
SIGNAL I / O RS232
GPIB
GB Rx
SENSE H
SOURCE H
SENSE L
SOURCE L
RETURN
HI-POT
IR
HIGH VOLTAGE
CAUTION
MAX.
6.0 kVDC
5.0 kVAC
SER. NO. LB
High voltage terminal
Signal I/O, RS232 
& USB port
Fan vents
Fuse selectorLine voltage
Optional GPIB port
GND
Return, Sense 
and Source 
terminals
SIGNAL I/O port 
SIGNAL I / O
The SIGNAL I/O port is used to 
monitor the tester status (PASS, 
FAIL, TEST) and input (START/ 
STOP signals). It is also used with 
the Interlock key. 
USB A port 
Used for remote control. 
RS232 interface 
port 
RS232
Used for remote control and 
firmware updates. 
Fan/Fan Vents 
Exhaust fan. Allow enough room 
for the fan to vent. Do not block the 
fan openings. 
GND 
GND
Connect the GND (ground) 
terminal to the earth ground. 










