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Hello Andreas

Thank you very much for your suggestion.

We measured the voltage at different magnetic steps and we found out linear
correlation, this is the only thing I did for magnet current regulator board .
I cannot ruled out if  magnet current regulator board causes the problem.


Best regards
Getachew A. Adnew
-----------------------------------------------------------------------------------
Getachew A. Adnew
PhD student
email: [log in to unmask]
Institute for Marine and Atmospheric Research Utrecht (IMAU)
Princetonplein 5
Utrecht University
3584CC Utrecht, The Netherlands
Phone: (+31)-30-2531555

On Wed, Jul 25, 2018 at 2:27 PM, Andreas Probst <
[log in to unmask]> wrote:

> Hi Getachew,
>
> some years ago we had a similar problem. There was no signal at all.
>
> Our service changed the magnet current regulator board and after
> recalibrating
>
> all was fine again.
>
> How did you check that this board works properly ?
>
>
>
> Regards
>
>
>
> Andreas
>
>
>
> *Von:* Stable Isotope Geochemistry [mailto:[log in to unmask]] *Im
> Auftrag von *Getachew Agmuas
> *Gesendet:* Mittwoch, 25. Juli 2018 13:50
> *An:* [log in to unmask]
> *Betreff:* Re: [ISOGEOCHEM] AW: [ISOGEOCHEM] Fwd: Signal Loss on Delta
> Plus XL
>
>
>
> Hello Andreas
>
>
>
> I did a magnetic field scan several times already, but I did not see any
> signal at all.
>
>
>
>
> Best regards
>
> Getachew A. Adnew
>
> ------------------------------------------------------------
> -----------------------
>
> Getachew A. Adnew
>
> PhD student
> email: [log in to unmask]
> Institute for Marine and Atmospheric Research Utrecht (IMAU)
> Princetonplein 5
> <https://maps.google.com/?q=Princetonplein+5+Utrecht&entry=gmail&source=g>
> Utrecht
> <https://maps.google.com/?q=Princetonplein+5+Utrecht&entry=gmail&source=g>
> University
> 3584CC Utrecht, The Netherlands
>
> Phone: (+31)-30-2531555
>
>
>
> On Wed, Jul 25, 2018 at 1:41 PM, Andreas Probst <
> [log in to unmask]> wrote:
>
> Hi Getachew,
>
>
>
> If you make a magnetic field scan in Instrument Control. Do you get any
> signal ?
>
>
>
> Regards
>
>
>
> Andreas
>
>
>
>
>
> *Von:* Stable Isotope Geochemistry [mailto:[log in to unmask]] *Im
> Auftrag von *Getachew Agmuas
> *Gesendet:* Mittwoch, 25. Juli 2018 13:18
> *An:* [log in to unmask]
> *Betreff:* [ISOGEOCHEM] Fwd: Signal Loss on Delta Plus XL
>
>
>
> Dear all
>
>
>
> Our Delta Plus XL is still not working, we did not find any signal so far
> (we tried both for CO2 and O2). We looked the possible reasons so far, but
> still we did not solve it. Things we checked:-
>
> - we changed the broken  filament
>
> - we did amplifier test, works fine
>
> - The Magnet current control board works fine
>
> - The fuse for the high voltage board works fine
>
> - connection wires inside the Teflon block on the front of the source
>
>
>
> Finally, we changed the filament again even if it is not broken, but it
> does not help.
>
>
>
> Any suggestion and feedback is well come.
>
>
>
>
> Best regards
>
> Getachew A. Adnew
>
> ------------------------------------------------------------
> -----------------------
>
> Getachew A. Adnew
>
> PhD student
> email: [log in to unmask]
> Institute for Marine and Atmospheric Research Utrecht (IMAU)
> Princetonplein 5
> <https://maps.google.com/?q=Princetonplein+5+Utrecht&entry=gmail&source=g>
> Utrecht
> <https://maps.google.com/?q=Princetonplein+5+Utrecht&entry=gmail&source=g>
> University
> 3584CC Utrecht
> <https://maps.google.com/?q=Princetonplein+5+Utrecht&entry=gmail&source=g>,
> The Netherlands
>
> Phone: (+31)-30-2531555
>
>
>
> ---------- Forwarded message ----------
> From: *Getachew Agmuas* <[log in to unmask]>
> Date: Sat, Jul 21, 2018 at 3:11 PM
> Subject: Signal Loss on Delta Plus XL
> To: Stable Isotope Geochemistry <[log in to unmask]>
>
> Dear all
>
>
>
> After I changed a broken filament, I could not find signal signal any
> more. I opened the ion source and  checked the filament looks fine. I tried
> to play with the focusing but there is no luck. Does any body have any idea
> or suggestion what to do?
>
>
>
> Best regards
>
> Getachew A. Adnew
>
> ------------------------------------------------------------
> -----------------------
>
> Getachew A. Adnew
>
> PhD student
> email: [log in to unmask]
> Institute for Marine and Atmospheric Research Utrecht (IMAU)
> Princetonplein 5
> <https://maps.google.com/?q=Princetonplein+5+Utrecht&entry=gmail&source=g>
> Utrecht
> <https://maps.google.com/?q=Princetonplein+5+Utrecht&entry=gmail&source=g>
> University
> 3584CC Utrecht, The Netherlands
>
> Phone: (+31)-30-2531555
>
>
>
>
>