[3dem] vitrobot humidifier

[Bill Tivol]

On Mar 12, 2009, at 1:23 PM, Rachel Scherer wrote:

> Our "Mark I" vitrobot has not beenused for several months. The  
> humidifier is not behaving well, not always responding to either the  
> "enable" button on the software, or to the humidity set point. We  
> can see that the red light inside the water chamber that comes on  
> when the humidifier is running sometimes is quite dim, sometimes  
> bright, and this A: seems to be indicating when it is working  
> properly (bright=on) and B: not something anyone ever noticed about  
> it before - it always seemd to be ON or OFF with no intermediate  
> (and dysfunctional) state.
> I will add though, that form day one, the humidifier has always been  
> wonky in its response ot set point and whether or not it resonded  
> fist time to the enable/disable toggle on the software.
> Anyone seen anything similar? More important - anyone know how to  
> fix? We do not have a service contract.


Dear Rachel,
	We had a lot of problems with the humidifier on our first Vitrobot,  
also a Mark 1.  The newer Vbots have apparently solved this problem,  
but I am not certain that the new humidifier units can be installed on  
the old Vbots.  I think they can, but even if the humidifier body fits  
into the old position, there may be power supply differences between  
the old and new humidifiers.  I suggest emailing Marc Storms, mhs at nl.fieco.com 
, since he would know the answers.  He can, of course, also let you  
know how much a fix will cost.  Good luck.
Yours,
Bill Tivol, PhD
EM Scientist
Ultrafast EM Facility
Noyes Laboratory, MC 127-72
California Institute of Technology
Pasadena CA 91125
(626) 395-8833
tivol at caltech.edu

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