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#???GWINSTEK?2019
#???GDM-8300?series?DMM??USB_CDC?&?RS232?port?DEMO?Program
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import?visa????#?Need?install?pyvisainstrument


#?Change?VISA_ADDRESS?to?a?serial?VISA?address?e.g.?‘ASRL2::INSTR‘
VISA_ADDRESS?=?‘ASRL27::INSTR‘???#Your?instruments?VISA?address?goes?here!‘

try:
????#?Create?a?connection?（session）?to?the?serial?instrument
????resourceManager?=?visa.ResourceManager（）
????session?=?resourceManager.open_resource（VISA_ADDRESS）
????print（VISA_ADDRESS）

????#?For?Serial?and?TCP/IP?socket?connections?enable?the?read?Termination?Character?or?read‘s?will?timeout
????if?session.resource_name.startswith（‘ASRL‘）?or?session.resource_name.endswith（‘SOCKET‘）:
????????session.rea