DMM6500 pops up an error code 1135 when using remote control

Posted Thu, 01 Dec 2022 15:27:11 GMT by Hsiang, Sunny

Hi friends:

We have a problem about DMM6500 pops up an error code 1135 when using remote control, but it doesn't seem to affect the measurement.
We want to know what's the reason for this, how to solve it? We did not find any reference to error code 1135 in the programming manual.
Does anyone know how to fix this? Does anyone have this same problem?
Thanks for you help!

Posted Thu, 01 Dec 2022 15:32:02 GMT by McKinney, Ty

Hello,
As listed in the error message, error code 1135 is a syntax error meaning there is a typo or invalid character somewhere within your program. I would recommend stepping through your script to find the exact command that is throwing this error.
Hope this helps!

Posted Thu, 01 Dec 2022 15:55:32 GMT by Hsiang, Sunny

Hi McKiney Ty,

Do you mean that the SCPI command entered has a syntax error? There is typo or invalid character? Such as ,
"SENS:FUNC 'VOLT:DC'"
"SENS:VOLT:RANG AUTO ON"

Or do you mean is Visa command has a syntax error?

Posted Mon, 05 Dec 2022 00:23:14 GMT by C, Andrea

Most likely there is a syntax error in the SCPI command you are sending.

On these touch screen models like DMM6500, you can enable command logging in Event Log and have the instrument identify the offending command for you.

Here is brief video showing the process:
https://www.youtube.com/watch?v=cVU_C308EUc

Posted Mon, 05 Dec 2022 15:05:25 GMT by Hsiang, Sunny

Thank every one of you!
I'm back again, and seem to have found the answer with your help.

I enable command logging in Event Log and found the offending command just like the video demonstration. I found the SCPI command "SENS:VOLT:RANG AUTO ON" and "SENS:VOLT:INP AUTO " seem to be in conflict, because the command "SENS:VOLT:RANG AUTO ON" will report Error 1135 when command "SENS:VOLT:INP AUTO " is used, but the command "SENS:VOLT:RANG 15" will not report Error 1135 when command "SENS:VOLT:INP AUTO " is used. Please see the attached picture for details, the"Report Error 1135.jpg" and "Not report Error 1135.jpg".

I read a paragraph in the DMM6500 programming manual about "SENS:VOLT:INP AUTO" that seems to be able to explain the above phenomena. I've copied it here:

Automatic input impedance provides the lowest measure noise with the highest isolation on the

device under test (DUT). When automatic input impedance is selected, the 100 mV to 10 V voltage

ranges have more than 10 GΩ input impedance. For the 100 V and 1000 V ranges, a 10 MΩ input

divider is placed across the HI and LO input terminals.

My understanding is that if the command "SENS:VOLT:INP AUTO" is used, then "SENS:VOLT:RANG number" can be used, not "SENS:VOLT:RANG AUTO ON" . Because "SENS:VOLT:INP AUTO" needs to manually select the voltage range, such as select 100 mV to 10 V range, or 100 V and 1000 V ranges.

That's my understanding. Correct me if I'm wrong.