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6220/2182A Delta mode resistivity measurement

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StHoffmann
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Country: Germany

6220/2182A Delta mode resistivity measurement

Post by StHoffmann » April 6th, 2016, 5:21 am

Hello,

I have some issues with the delta mode.
Background:
The 6220 is connected with a 2182A by RS232.
Also a connection via GPIB, in detail via KUSB-488B, to a laptop (USB port) is established.
The KI6220 LabView software is running on the laptop (windows xp).
The KUSB-488B is installed properly (KI-488_v3.12.1), a connection is established and i can take control of the 6220 by using the software.

Problem:
While trying to run the delta mode three errors occur
a) -113 | Undefined header (6220)
b) -222 | Parameter data out of range (6220)
c) -121 | Invalid character in number (2182A)

Any guesses why these three errors appear and how the problem can be solved?

Kind regards
Stephan

Dale C
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Re: 6220/2182A Delta mode resistivity measurement

Post by Dale C » April 6th, 2016, 11:37 am

Stephan,
First make sure you have the 6220/2182A set up properly for Delta mode.

Basic Delta Model configuration procedure.
Delta Mode Basic Configuration
1.Connect 2182A and 6220 together with NULL MODEM serial cable.
2.Connect 2182A and 6220 together with trigger link cable.
3.Set 2182A to RS-232 mode (19.2k BAUD, Flow is XonXoff, Terminator is CR).
4.Set 6220 to GPIB mode.
5.Press DELTA on 6220 and it should be in Delta mode


If it is then try the software again.
If not recheck the above settings.

StHoffmann
Posts: 4
Joined: April 5th, 2016, 7:11 am
Country: Germany

Re: 6220/2182A Delta mode resistivity measurement

Post by StHoffmann » April 7th, 2016, 6:57 am

Hello,

the basic setup is according to your advice.
There was only one adjustment necessary, Flow was not XonXoff. This is now changed.

In general, the delta mode works (and has worked before) operating the two units (6220 and 2182A) manually, a 10 mOhm resistance is measured correctly.

After making the change "Flow is XonXoff", the three errors occurred again so the problem is still exists.


Kind regards
Stephan

Dale C
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Re: 6220/2182A Delta mode resistivity measurement

Post by Dale C » April 7th, 2016, 10:21 am

Ok. it seems that manually operating these two units in delta mode works.
Is this correct?
Then let us look at the error codes.
-113 is basically a syntax error. I have never seen a syntax error with the KI6220.VI program until now.
-222 is a data parameter out of range error. This means something like setting the voltage range to 1000V or the current to 10A. This one may skew the rest of the program. Can you tell me the parameters you are using?

-121 is basically another syntax error.

I believe the -222 error is the cause of this.
Can you print the screen where you set up the delta mode and post it here?
Maybe I could see something from that.

StHoffmann
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Joined: April 5th, 2016, 7:11 am
Country: Germany

Re: 6220/2182A Delta mode resistivity measurement

Post by StHoffmann » April 15th, 2016, 4:49 am

Hello Dale,

please find some - attached (all - are copied to one file).

It starts with executing the delta mode manually (first three -).
- 4 shows the device manager where the KUSB-488B is listed.
- 5 shows the instrument communication setup which reports "valid setup".
- 6 is a screenshot which shows the default setup when choosing "advanced operation" --> "delta mode measurements"
- 7 and 8 show the error codes when executing the delta mode.
Despite the errors the delta mode seems to be started, but the results are not viable, - 9 and 10.
- 11 is a screenshot of the results of the delta mode and - 12 shows the setup for the current which i usually use, 100mA .

Hope that gives you further informations.

Kind regards
Stephan
Attachments
KUSB-488B.jpg
KUSB-488B.jpg (1.88 MiB) Viewed 31700 times

Dale C
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Re: 6220/2182A Delta mode resistivity measurement

Post by Dale C » April 15th, 2016, 7:16 am

Sounds like the Model 6221 is set to KI-220 Language mode.
To check it press COMM.
Select GPIB, press ENTER.
Address is usually 16, press ENTER.
Select SCPI as the language.
Let me know if this helps.

Dale C
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Re: 6220/2182A Delta mode resistivity measurement

Post by Dale C » April 15th, 2016, 7:19 am

No that would not be it. I did this on my 6221/2182A set up and got error 955 IDDCO error.

Dale C
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Re: 6220/2182A Delta mode resistivity measurement

Post by Dale C » April 15th, 2016, 7:49 am

Looks like your delta voltage is 50V. How could this be?
You are sourcing 100mA into 0.01 ohms. That should be 0.001V.
or when you are sourcing 20uA it should be a lot less.
I see 50V on your screen shots for each source current.
You select the 10mV range, but it does not show OFLO?
Something is basically wrong.
Can you uninstall and reinstall the KI6220 program?
Maybe that would help.

StHoffmann
Posts: 4
Joined: April 5th, 2016, 7:11 am
Country: Germany

Re: 6220/2182A Delta mode resistivity measurement

Post by StHoffmann » April 25th, 2016, 5:38 am

Hello Dale,

I've performed a test on a different pc.
The result was the same, all three errors did occur.

The most remarkable in my eyes is the fact that I can take control of the 6220 by using the software and set e.g. the "I-high" for the delta mode.
So there is a communication, but when running a measurement sequence, those errors appear....

Kind regards,
Stephan

Andrea C
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Re: 6220/2182A Delta mode resistivity measurement

Post by Andrea C » April 28th, 2016, 9:46 am

I wonder if it could be a decimal separator issue of dot vs. comma.
Check the localization settings for the KI6220 software.

Go to Tools>Options...
Select Front Panel in the drop down.
Remove check box from the Use localized decimal point.

http://forums.ni.com/t5/LabVIEW/Problem ... d-p/181366

massimopinto
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Joined: June 21st, 2017, 2:32 pm
Country: Italy

Re: 6220/2182A Delta mode resistivity measurement

Post by massimopinto » June 21st, 2017, 3:20 pm

Dale C wrote:
April 6th, 2016, 11:37 am
Stephan,
First make sure you have the 6220/2182A set up properly for Delta mode.

Basic Delta Model configuration procedure.
Delta Mode Basic Configuration
1.Connect 2182A and 6220 together with NULL MODEM serial cable.
2.Connect 2182A and 6220 together with trigger link cable.
3.Set 2182A to RS-232 mode (19.2k BAUD, Flow is XonXoff, Terminator is CR).
4.Set 6220 to GPIB mode.
5.Press DELTA on 6220 and it should be in Delta mode


If it is then try the software again.
If not recheck the above settings.
In the attempt to establish Delta Mode connection between a 6220 current source and a 2182A nanovoltmeter, I am using a Visual C++ based code that we have been developing at my research institute over the years (not working in LabView for this application). With some minor adaptation, since the source meter is a current source, I have established the method by following the step-by-step procedure based on front panel operation that is described in the 2182A reference manual, section "Radio and Delta", page 5-9 and ff.

To my surprise, this works without a physical RS232 connection between the 6220 and the 2182A, which are in fact connected via GPIB and via the trigger link cable.
I am however finding it difficult to translate the step-by-step front panel operation procedure into SCPI commands, and in fact my SCPI command sequence returns a -241 error (hardware missing, that is the 2182A) on the 6220 when this tries to communicate with the 2182A.

For example, is the front panel operation sequence, borrowed from the 2182A manual for delta mode operation with a source meter,
  1. Arm-Layer
    Arm-In Event: Immediate
    Arm-out Tlink line: #3
    Arm-our Events. Off
    Arm Count: Infinite
exactly corresponding to this list of SCPI commands sent to the 6220?
  • ARM:SOUR IMM
    ARM:OLIN 3
    ARM:OUTP NONE
and similarly, is this list of operations
  • Trig-Layer, Trigger In
    Trigger In Source: Trigger link
    Trig-In TLink Line: #1
    Event Detect Bypass: Never
    Trigger In Events: SOURCE=ON DELAY=OFF MEAS=OFF
  • Trigger-Out
    Trig-Out TLink Line: #2
    Trigger Out Events: SOURCE=ON DELAY=OFF MEAS=OFF
    Delay: 000.0000s
    Trig-Count: 0002
corresponding to this list of SCPI commands? I don't think this is exactly so, as it is clear that I must by missing some parts.
  • TRIG:SOUR TLIN
    TRIG:ILIN 1
    TRIG:OLIN 2
    TRIG:OUTP SOUR
    TRIG:DIR SOUR
Thank you for any clarification that you may address here.
Massimo

massimopinto
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Joined: June 21st, 2017, 2:32 pm
Country: Italy

Re: 6220/2182A Delta mode resistivity measurement

Post by massimopinto » June 22nd, 2017, 2:56 am

massimopinto wrote:
June 21st, 2017, 3:20 pm

In the attempt to establish Delta Mode connection between a 6220 current source and a 2182A nanovoltmeter, I am using a Visual C++ based code that we have been developing at my research institute over the years (not working in LabView for this application). With some minor adaptation, since the source meter is a current source, I have established the method by following the step-by-step procedure based on front panel operation that is described in the 2182A reference manual, section "Radio and Delta", page 5-9 and ff.
[...]
Thank you for any clarification that you may address here.
Massimo
May be better to add a more general question to what I was writing above, last night.
What I am trying to achieve using a pair of 6220 and 2182A instruments, hopefully connected in DeltaMode, is part of a larger experiment in which the above two are in a GPIB network with other 6 Keithley instruments (totaling 2x2182A, 2x6220, 1x7001 and 3x2400).
Now I have indeed managed to set a DeltaMode connection between a 6220 and a 2182A by operating on their front panels, but I cannot leave the GPIB behind to contro these two (and the other 6) remotely. Since it appears that I have to choose over RS232 or GPIB, the choice of DeltaMode in GPIB connectivity essentially impossible?
Thank you!
Massimo

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