Question about LakeShore 325 Temp.Controller

[THN]

Hi guys,

I'm using the LakeShore 325 Temperature Controller for some measures. And i got stucked with this problem: i need to divide the ramp by segments. Which means that the ramp will not start from 0 all time. My idea is to make 1 ramp divided at a maximum of 4 segments. For ex: 1st segment from 100K to 200K, 2nd ramp from 250K to 400K, etc..

The problem is that i can't find that option on the instrument driver. It only allows me to configure the ramp, which means, that i can insert it's rate and if i'm going to have a set point or not. And the other option that is on the instrument driver is the configuration of the setpoint, that only allows me to insert 1 setpoint. What should i do? I need 2 setpoints, 1 for the minimum temperature and 1 for max. temperature.

I can't use the PID control, and i'm attaching the drivers here with 1 sketch of my main VI.

Thanks in advance.

[THN]

Can someone give a look at this new idea for my code? I'm stucked at this point, i'm not sure how to do it. And despite of some user's advices, i can't work it out.

Will this attach work?

Thanks in advance.

[THN]

Can some1 help me out and check if my VI is well programmed.

[BillMe]

Is the instrument driver supplied by Lakeshore? If so, I'd suggest you call them. I always take advantage of vendor tech support. Ask anyone at N.I.

[RavensFan]

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Bill@NGC wrote:
Is the instrument driver supplied by Lakeshore? If so, I'd suggest you call them. I always take advantage of vendor tech support. Ask anyone at N.I.

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That's weird.  Your post has a tremendous amount of white space before it gets to the bottom of the message.  But it doesn't look like any extra blank lines.  Even quoting your message above doesn't show any reason for the extra white space.

EDIT:  After posting my message, I saw that mine has a lot of white space, as well as replies #2 and #3.  #1 seems okay for white space but has a grey band at the right hand side containing the Kudo's icon.  I wonder if that is the source of the problem.

I think I'll send a link to the moderator to investigate the HTML of this page.

Message Edited by Ravens Fan on 07-30-2009 09:46 PM

[BillMe]

Yeah, I see that gray band too. And the 7 or 8 lines of whitespace in the other posts, including mine.

[maholtz]

Hi Everybody,

I have a new Lakeshore 325 controller (one year old) and I have used it with LV 8 no problem. However, I need to attach it to a legacy machine that is running LV 6.1.

Does anyone have the legacy drivers for this controller running under LV 6.1?

Thank you!

[Mathieu_R.]

Dear Maholtz,

First of all, I invite you to create a new thread for each new question, and to lik related topics into this new thread.

Now, about the instrument driver, the readme file clearly indicates that it is designed for LabVIEW 8.0 or later. To get version of those VIs for LabVIEW 6.1, I think you have two options:

1. Downgrade the existing version of the instruments driver using "Save for previous version" option. You will need a version of LabVIEW 8.x to downgrade to LabVIEW 8.0, then LabVIEW 8.0 to downgrade it in LabVIEW 7.1, and so on. this option exposes you to code compatibility issues, if some of the functionnality used by the LV 8.0 driver are not avilable under previous versions of LabVIEW.

2. Ask LakeShore for an instrument driver that supports LabVIEW 6.1.

Hope this helps,