Dear all,
I just wanted to give a quick update on the problem we were having with the non-existing high voltage on a Delta V.
In the end, the problem was on the piggy-back bus-control board.
Question: Does anyone have a functioning spare one to sell for a competitive price or know of a secret stash somewhere?
Please DM me, if you really do.
Cheers,
Alex
From: Stable Isotope Geochemistry <[log in to unmask]>
On Behalf Of Frank, Alexander
Sent: Monday, March 21, 2022 11:16
To: [log in to unmask]
Subject: Re: [ISOGEOCHEM] High voltage stubborn at 0.32 kV on Delta V Advantage
Hi again,
@andy: Yes, we’ve checked the 3 fuses on the ion source controller board – they seem to be ok.
We had a look at the ion source rebuild and are waiting for some replacement bits that looked not super trustworthy when inspected more closely.
@chip: We’ve checked if the HV would come on if we disconnect the filament, but not the other pins. I’ll check that.
Thanks for the suggestions so far
Alex
From: Stable Isotope Geochemistry <[log in to unmask]>
On Behalf Of Donald Chipley
Sent: Friday, March 18, 2022 18:58
To: [log in to unmask]
Subject: Re: [ISOGEOCHEM] High voltage stubborn at 0.32 kV on Delta V Advantage
Hi Alexander,
LD5 should be green. If you disconnect all the wires from the source feedthrough and ensure that each is isolated from the others and grounds, does LD 5 glow green? This might tell you if the problem
is in the source or the board. You could also try disconnecting the other ends of the wires from the board to be sure that there isn't a short in the cable.
chip
Don Chipley, PhD
Queen's Facility for Isotope Research
Dept.of Geol. Sci. and Geol. Eng.
Queen's University
36 Union Street
Kingston,Ont. CANADA K7L 3N6
PH 613-533-2016
qfir.ca
From: Stable Isotope Geochemistry <[log in to unmask]> on behalf of Andrew Schauer <[log in to unmask]>
Sent: March 18, 2022 11:32
To: [log in to unmask] <[log in to unmask]>
Subject: Re: High voltage stubborn at 0.32 kV on Delta V Advantage
Hi Alexander,
Any blown fuses? Another thought - if the pins that should not be making contact are not making contact, then even if one has come loose, I believe the HV should still turn on. If one of the pins is indeed shorting, perhaps that will prevent
the HV from turning on.
andy
On Fri, Mar 18, 2022 at 5:28 AM Frank, Alexander <[log in to unmask]> wrote:
Dear Colleagues,
We have recently encountered the following problem with our Delta V Advantage shortly after (but not immediately after) an ion source cleaning:
During a standard on-off sequence, the established high voltage got lost.
Since then, it is at 0.32 kV no matter what I set it to be. Thus, it does NOT change if I set the HV to 0(!) or 3 kV.
Of course, the LED at the front panel is orange. The LED LD5 on the HV-supply board on the back panel is off!
All other LEDs on the back panel are green.
I have restarted the computer and turned the machine off and on several times through the main switch. Also, I pressed the HV reset button. The emission seems to be on, and the vacuum is fine. I've checked the ion source pins for conductivity. As expected, the Halogen lamp-pin connects to the ground. Also, do the cathode + and cathode - pin connect to each other. All others do not.
I would greatly appreciate any help/insight you can provide.
Best,
Alexander
Dr. Alexander Frank
Lab Manager BayCenSI
Bayreuth Center for Stable Isotope Research in Ecology and Biogeochemistry
within the Bayreuth Center for Ecology and Environmental Research (BayCEER)
GEO I Building Room 032
University of Bayreuth
Universitätsstr. 30
95445 Bayreuth
Germany
Tel: +49 (0)921-552319
Fax: +49 (0)921-552191
--
Andrew Schauer | he/him
IsoLab Manager
http://isolab.ess.washington.edu/