how to close multiple channel in keithley 2000 DMM AND TC2001 SCAN CARD using gpib- labview

[syamni]

SIR,

I need help to open/close multiple channels in Keithley 2000DMM(I would like to take output from all the 10 channel from the card)

thanks in advance

shan..

[Dennis_Knutson]

Since you already have the driver, you just need to call either the Configure Scan or Configure Route function. Depends on whether you want to perform a scan of all channels and a Read Multiple function or open/close each one before a Read Single function.

[syamni]

thank you sir.. but .i can't close all channel,when i am going to use "configure scan.vi"

[Dennis_Knutson]

I don't understand what you mean. When you do a scan, do you get some sort of error?

[syamni]

yes sir... keithley showing an error of "Possible reason(s):ke2000 Error Query;instrument reports:-221,"Settings conflict".When i am using config scan.vi ,I can't take output volt because none of the channels are closed..

[Dennis_Knutson]

I'm not sure why you would want to read volts when you are reading a temperature. You really need to attach your code. I don't have a 2000 and it has been a while since I've used one so I'm going by memory.

[syamni]

Here is my vi..here i am using temperature conversion polynomial for K type thermocouple.But i am not able to get multi channel temperature data.Please help me...

[Dennis_Knutson · Accepted solution]

I would recomend you set the measurement function so that you read temperature. You may also need to configure the thermocouple type. You should be able to get rid of all that manual conversion you are doing. I think you also need a trigger function before the read in order to initiate a scan.

The manual is the best place to get an understanding of the steps required to do a scan and read.

[syamni]

thanks...see u on the  later discussion...

[crossrulz]

Your "scan mode" is default to "none".  That could pose a problem.  I think you want that to be "Internal".