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2510-AT Autotuning fails

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ThomasG
Posts: 2
Joined: November 3rd, 2015, 5:11 am
Country: Sweden

2510-AT Autotuning fails

Post by ThomasG » November 3rd, 2015, 5:19 am

Hi,

Autotuning fails with error code "Autotune-Cannot to find 20% Temp", what is "Temp"?

My system is an Peltier testsystem and PT100 element

Here are my program calls:
*rst
:sour:volt:prot 10
:sens:curr:prot 5
:UNIT:TEMP CEL
:SOUR:TEMP:PROT 50
:SOUR:TEMP:PROT:LOW 18
:TEMP:TRAN RTD
:TEMP:RTD:TYPE PT100
:TEMP:RTD:RANG 100
:TEMP:CURR:AUTO ON
:SYST:RSEN ON
:SOUR:TEMP:LCON 20
:SOUR:TEMP:LCON:INT 0.3
:SOUR:TEMP:LCON:DER 0.0
:sour:temp:prot:state ON
*ese 16
stat:oper:enab 128
*SRE 1
*cls
:sour:temp:atun:systau long
:sour:temp:atun:start 25
:sour:temp:atun:stop 30
:sour:temp:atun:init

BR
/Thomas

Norbert W
Keithley Applications
Keithley Applications
Posts: 227
Joined: October 21st, 2010, 7:18 am
Country: Germany

Re: 2510-AT Autotuning fails

Post by Norbert W » November 5th, 2015, 1:28 am

Hello,

there is an older application note which covers auto-tuning quite well.
Taking it at hand and running the auto-tuning you should be able to identify when
the issue arises and take countermeasures as stated there.
2510AT_AN.pdf
(404.86 KiB) Downloaded 996 times

ThomasG
Posts: 2
Joined: November 3rd, 2015, 5:11 am
Country: Sweden

Re: 2510-AT Autotuning fails

Post by ThomasG » November 5th, 2015, 2:10 am

Hi Norbert,

Yes i have read that and the Application Note but i still get the error code that autotune can't reach 20% Temp, but i don't know what "Temp" it's trying to reach?

If i have start temp e.g. 24.5 C is it trying to reach 20% of that 4.9 C?

BR
/Thomas

Norbert W
Keithley Applications
Keithley Applications
Posts: 227
Joined: October 21st, 2010, 7:18 am
Country: Germany

Re: 2510-AT Autotuning fails

Post by Norbert W » November 16th, 2015, 12:51 am

Hi Thomas,

here is an excerpt from the programming example

send (kth2510AT, “:sour:temp:atun:start 25”, status) ‘25C start temp
send (kth2510AT, “:sour:temp:atun:stop 30”, status) '30C temp setpoint.

Here you can see that a start and a stop temperature is used, the difference is a 100 % step.

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