automatic temperature measurement test

[1980]

Hi,

I have to read some values at constant temperature for a while. Then, after a certain time the temperature should rise or fall to defined temperature for further measurements. I'm doing it manualley right now,which takes me a lot of time. I want to switch it to automatic mode. I would be very grateful, if someone can help me to some hints to build this block.Thank YOu.

Regards,

JAMIL

[CJ_Butler__DASYLab_Pro]

We need more information about your DAQ device, and how you propose to control the temperature.

This is a typical application for PID control, where the target temperature is the Setpoint for the PID.

What version of DASYLab do you have, what operating system, and what DAQ device?

[MHa]

Hello,

this sounds for an optional usage from

DASYLab Two-Point Control standard module to regulate the temperature under range of tolerance or one of the other 3 variants

DASYLab Sequence Generator addon module to define the temperature program

Best regards,

MHa

National Instruments Engineering GmbH & Co. KG |

Pascalstraße 18 | D-52076 Aachen

[1980]

Hi MHa,

at first I would like to add that I am not so much used to with DasyLab. That program is done by another engineer. I have to update some features only. If you do not mind could you give some examples of the above module what you discussed. Thanks in advance.

Regards,

[MHa]

Hello,

with the Sequence Generator you can write your temperature "program".



This program are the "S=set points" inputs for two-point module. The AI module generate "0" the actual values from your temperature system for two-point module. And the "0" output channel produce the new set values for your temperature system which is to regulate.

Best regards,
MHa

National Instruments Engineering GmbH & Co. KG | Pascalstraße 18 | D-52076 Aachen

[1980]

Dear MHa,

Thank you for your cooperation. I am using at my Lab DasyLab 7.0 (German Version) . Where Sequence generator Module (Sollwertgenerator Module) is optional. How could I add this module. Actually I would like to make the programm in the following way in DasyLab 7.0.

1st Step: Temperature  100 °C will be constant for 30 minutes

2nd Step:  150°C will be constant for 30 minutes

3rd Step:   200°C will be constant for 30 minutes

4th step:   150°C will be constant for 30 minutes

6th Step: 100°C will be constant for 30 minutes.

I hope your information will help me to build this programm. Thanks in advance.

Sincerely Yours,

[MHa]

Hello,

the DASYLab 7.0.5 Release is from 2003 and is not longer supported from us. Is there a way that you can update over your local DASYLab reseller to version 11.0.1?

Perhaps is this link useful -> http://www.mccdaq.com/daq-software/dasylab-upgrf2p.htm (included Sequence Generator)

Best regards,

MHa

[CJ_Butler__DASYLab_Pro]

I concur with MHa... updating your software to the current version will ensure that you have our full support.

There is another way to accomplish a simple set of steps - up to 16 - using the V7 Time Slice module (Data Reduction Group), in V11, this module is called the Signal Switch module. You can configure it to change from input to input according to time.

I no longer have V7, so I won't post an example, but, here is a screen shot of the program in V11. I used Global Variables to store the target values, but you can use a Generator (generate constant), to do the same thing.