Hello all,
I am having a problem to find the correct commands to configure the DMM or to send to the DMM to measure impedances through 2 wires.
The impedances I am measuring can different values from 0 ohms to about 50K ohms, it is working fine for low values impedances but for high impedances like higher than 15K ohms I am having problems to get the right value, I mean if I measure manually they give the right value and constant If I measure through remote program they give me different values, so I am not sure if the commands I am using are the right, I am just staring using remote programming on this DMM so I think I am not using the right commands.
SYSTem:REMote
Put probe in one component and send measure command
MEASure:RESistance?
Move probe to another component and send measure command
MEASure:RESistance?
I am really not sure which ranges are the impedances I am measuring so I can not send any specific range, so I would like to send autorange but the problem is that I am not sure if the command for autorange I am using is fine because I tried and the results are the same, the readings are not the same that measured manually, I am not sure if I should send any kind of delay for give the time to the DMM to get the right measurements or maybe another commands that I don't know.
Finally I would like to comment that the readings I see in the terminal are the same I see in the DMM display so I don't think is a problem with communication so I neither receive any kind of error in the DMM display.
Please help!
I am having a problem to find the correct commands to configure the DMM or to send to the DMM to measure impedances through 2 wires.
The impedances I am measuring can different values from 0 ohms to about 50K ohms, it is working fine for low values impedances but for high impedances like higher than 15K ohms I am having problems to get the right value, I mean if I measure manually they give the right value and constant If I measure through remote program they give me different values, so I am not sure if the commands I am using are the right, I am just staring using remote programming on this DMM so I think I am not using the right commands.
SYSTem:REMote
Put probe in one component and send measure command
MEASure:RESistance?
Move probe to another component and send measure command
MEASure:RESistance?
I am really not sure which ranges are the impedances I am measuring so I can not send any specific range, so I would like to send autorange but the problem is that I am not sure if the command for autorange I am using is fine because I tried and the results are the same, the readings are not the same that measured manually, I am not sure if I should send any kind of delay for give the time to the DMM to get the right measurements or maybe another commands that I don't know.
Finally I would like to comment that the readings I see in the terminal are the same I see in the DMM display so I don't think is a problem with communication so I neither receive any kind of error in the DMM display.
Please help!
The commands you are using should work fine. Just tested with my 34401A and a decade box, and mine was measuring correctly no matter which impedance I dialed in.
The alternative method would be to use the CONF command instead of MEAS. This will allow you to customize the measurement a bit more, including increasing the NPLC, which may resolve your reading issues.
NPLC stands for Number of Power Line Cycles. If you increase this number, it increases the integration time of the measurement, which results in a more accurate answer.
ex.
CONF:RES
SENS:RES:NPLC 10
READ?