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:READ? return in simultaneous voltage and current measurement

Models 2400, 2401, 2410, 2420, 2425, 2430, 2440, 6430
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JeanSu
Posts: 1
Joined: January 11th, 2019, 4:31 am
Country: Switzerland

:READ? return in simultaneous voltage and current measurement

Post by JeanSu » January 11th, 2019, 4:39 am

Hi everyone,
I have a Keithley 2410, which I address using my own Python program. I am applying a fixed voltage and want to measure the real voltage (not the set one) and the current. The problem is that I do not understand the returned values from the :READ? command.

Code: Select all

WRITE: ":SOUR:FUNC VOLT"
WRITE: ":SOUR:VOLT:RANG:AUTO 0;:SOUR:VOLT:RANG 20"
WRITE: ":SOUR:VOLT:LEV 0.5"
WRITE: ":SENS:CURR:PROT 1
WRITE: ":FUNC 'VOLT', 'CURR'"
WRITE: "OUTPUT ON"
WRITE: ":READ?"
Return value: +4.998975E-01 (the applied 0.5V),+4.992652E-03 (current over 100Ohm resistor) ,+9.910000E+37 (?),+1.346539E+04(?),+2.355600E+04(?)

Does anybody know what these values stand for or where I can read about the return value? I already looked through the UserManual but didn't find anything.
Thanks in advance for your help!

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