I have three Delta PFB0824UHE, which were provided to me by a customer for a project. They are labeled 0.93A.



When actually hooked up to 24V, the fan draws .45A, regardless of head pressure. This current varies linearly with input voltage, going as low as .2A and as high as .5A across the fan's spec'd input voltage range. I have three units, which all behave the same. 

The datasheets I find for this part indicate a current draw of 0.77A.

I’m confused as to how much current I should actually expect this fan to draw. Do fan manufacturers typically allow that much overhead in their specs? Are they subject to manufacturing variations to that degree? Do I perhaps have some special variant of the fan, and not know it? Are they perhaps mislabeled? Should I expect the fan's current draw to increase over time, or with temperature or some other variable? 


Question: ASP.Net WebForms requiredfieldvalidator not working in FireFox?
Answer: Client-side validation may not work in all browsers and in all scenarios.  It's important to make sure that you always do validation on the server as well.

You may also want to take a look at what the DetermineRenderUpLevel() method on your validation control is returning in FF.  Behind the scenes, it checks to see that the following are true:


The browser has client script
enabled.
The W3CDomVersion property of the
HttpBrowserCapabilitiesBase object
that is stored in the
HttpRequest.Browser property is 1 or
later.
The EcmaScriptVersion property of the
HttpBrowserCapabilitiesBase object
that is stored in the
HttpRequest.Browser property is 1.2
or later.