Invoke a terminal application such as 
RealTerm. 
To check COM port number and other settings, 
see the Device Manager in PC. For WinXP; 
Control panel → System → Hardware tab. 
Run this query command via the terminal after 
the instrument has been configured for USB, 
RS-232 or GPIB remote control. 
*idn? 
This should return Model number, Serial number 
and Firmware version in the format below: 
GPT-12004  ,GPT12000    ,V1.00 
Model number : GPT-12004 
Serial number :8 characters serial number 
Firmware version : V1.00 
CR, LF, CR+LF can be used as the terminal 
character when entering queries/commands from a 
terminal application. Refer to page 195 for details. 
When the panel is being remotely controlled via 
the USB, RS232, LAN or GPIB interfaces, the 
RMT indicator will be displayed on the screen.