RE: VT error on inova spectrometer: Followup

From: Hsin Wang <wang_at_mail.csi.cuny.edu>
Date: Fri, 27 Jan 2006 13:11:01 -0500

I agree with Rich the VT cable is prone to have problems. The connection
needs to be checked. However, have you tried to "reset VT" with the
software? If the VT connector was disconnected from the probe (for example,
during the probe change), the heater resistance would read infinity and the
Highland controller will read error. Type "temp" in vnmr window and then
click "RESET VT" may solve the problem.

Hsin

--
Hsin Wang, Ph.D.
NMR Facility Manager
College of Staten Island
2800 Victory Boulevard
Staten Island, NY 10314
Phone: 718-982-3809
Fax: 718-982-3910
Email: wang_at_mail.csi.cuny.edu
> -----Original Message-----
> From: Richard Shoemaker [mailto:Richard.Shoemaker_at_colorado.edu]
> Sent: Thursday, January 26, 2006 3:09 PM
> To: 'Xianzhong Yan'
> Cc: ammrl_at_chemnmr.colorado.edu
> Subject: RE: VT error on inova spectrometer: Followup
>
>
> Xianzhong:
>
> I should probably have mentioned the obvious in my last message.  First
> remove and inspect the VT-connector to the probe, and then re-connect it,
> being absolutely sure that it's on all the way.
>
> All of the stuff that I wrote about checking the continuity of the heater
> current path assumes that a simple bad probe connection has been
> ruled out.
> These connectors are also notorious for wiggling loose, thanks to Varian's
> _wonderful_ way of connecting the DB-9 cable connector to the probe.  Of
> course, this has been discussed many times before.
>
> Cheers,
>
> -Rich Shoemaker
>
> ---
> Richard K. Shoemaker, Ph.D.
> NMR Facility Manager
> University of Colorado at Boulder
> Phone:  (303) 492-7062	Fax: (303) 492-5894
> E-Mail: Richard.Shoemaker_at_Colorado.edu
>
> -----Original Message-----
> From: Xianzhong Yan [mailto:yanxz_at_nic.bmi.ac.cn]
> Sent: Thursday, January 26, 2006 3:32 AM
> To: ammrl_at_ammrl.org
> Subject: VT error on inova spectrometer
>
> Dear all,
>
> Ihave problem with the VT controller of my Varian INOVA 600.When I was
> trying to set up the temperature to 27C, the temp didn't change,  and in
> acqstatus window it showed "VT: HW error". Then Ichecked the VT controller
> on the back of console. The left status LED on the front panel of VT
> controller (Highland L900) turned in red, which means some error. The
> display in control panel: STATE:  ERROR, LAST ERR : HTR RES. The last item
> is the error message indicating " measured heater resistance is blow 2 or
> above 40 ohms". Could anyone tell me what's really happened to the
> spectrometer? ( The MAX TEMP was set at 40C).
>
> Thanks,
>
> Xianzhong
> --------------------------------------------------------
> Xianzhong Yan, Ph.D.
> NMR Laboratory, National Center of Biomed. Analysis
> 27 Taiping Rd., Beijing 100850 P. R. China
> Phone: 86538174,66930305
> Fax: +8610-68186281
> E-mail: yanxz_at_nic.bmi.ac.cn
> >
> >
>
>

Received on Fri Jan 27 2006 - 15:52:20 MST