Interlock problem

Kai Zang kaizang at stanford.edu
Tue Oct 16 08:16:21 PDT 2012


Hi John, 

I did measurement between [0V, 1V] and [-1V, 0V]. Normally it should be OK, that's why I wonder something wrong with the machine. Right before this error message showed several times but last night it keeps showing.

Thanks for your reply! =D

Best,
Kai

-----
Kai ZANG
Electrical Engineering
Stanford University

Addr:
58 Dudley Ln, Apt 108B
Stanford University
California, USA, 94305
Tel: 650-561-5095
Email: kaizang at stanford.edu

----- Original Message -----
From: "John Shott" <shott at stanford.edu>
To: "Kai Zang" <kaizang at stanford.edu>
Cc: "micromanipulator6000" <micromanipulator6000 at snf.stanford.edu>
Sent: Tuesday, October 16, 2012 7:30:53 AM
Subject: Re: Interlock problem

Kai:

What voltage were you trying to use?  The B1500 has an external 
interlock cable that won't allow SMU voltages to exceed +/- 42 V unless 
the interlock is closed.  I only realized this recently ... Julie Segal 
pointed this out to me ...

We have ordered parts to attach magnetic proximity switches to the cover 
of the probe station so that the interlock will be satisfied when the 
probe station is closed (or mostly closed).  Unfortunately, while most 
of those parts will be shipped to us in the next couple of days, one of 
them won't arrive until the first week of Novemeber.

Were you trying to apply voltages higher than 42V, or were you seeing 
this error under all circumstances?

Thanks,

John


On 10/15/2012 10:18 PM, Kai Zang wrote:
> Hi all,
>
> Has any one of you encountered a problem of interlock problem? It said 'Interlock circuit is open. Interlock circuit must be closed for setting voltage source/compliance absolute value exceeding 42V'. And we cannot conduct any measurements at all.
>
> Thanks for your help in advance! =)
>
> Best,
> Kai
>
> -----
> Kai ZANG
> Electrical Engineering
> Stanford University




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