Problems with dropdelay on FacsAria

Ian Titley Ian.Titley at
Tue Jun 12 04:50:50 EDT 2007

Hi Yan

No idea if this is relevent but I had a problem visualising the
accudrop "spot" with the filter in place. It turned out that there are
adjustments that can be made to the accudrop camera settings (contrast
etc) but these can only be seen in the "service area" of the FACSDiVa
software which is password protected - hence you will need a service
engineer for this. When adjustments were made the spot could be well

Best wishes


Ian Titley PhD
Section of Haemato-oncology
Institute of Cancer Research
15 Cotswold Road
Surrey	SM2 5NG

Tel +44 (0)20 8722 4255

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>>> "Zhang, Yan" <yan.zhang at> 08/06/2007 11:42:52 >>>
Hi flowers

I 've had problems with dropdelay recently, the stream has been ok, but
when I started to run AccuDrop to decide the drop delay, I couldn't get
the side stream focused properly at 2000-4000 events/seconds, so when
the optical filter was turned on, I couldn't get up to 100, not even 70
of the intensity. 

But when I increased the acquisition speed to over 5000 events/seconds,
I could get nearly 100 side stream intensity. According to BD operation
manual, the acquisition speed should be within 2000-4000 events/s, so
what should I do? I tried to adjust the camera for side stream, the drop
generation was nice and stable, and I have tried to re-insert the nozzle
to get a nice stream with correct drop generation.

 I don't know what else I should adjust anymore. Could some experts
give me some practical suggestions for solving the problems?

Thank you!

Yan Zhang 

Akershus universityhospital

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