Posted: Sun Mar 09, 2008 4:47 pm
It just gives you the peak applied.
DigiBar PE 200 by HBM. This units give continuous pressure, tare function, stores min and max pressure in memory until cleared. Also graphs increasing and decreasing trends- If I ever should need to use that function...jimmy101 wrote:Do you have a part number or specs (or web link)? Is it a peak pressure recorder or does it gives a continous output?
First off, if your pipe has a burst pressure of 1000 psi, you're a dmaned fool to take a dynamic system to 800 psi.squarles2007 wrote:lets say you know that your chamber has an estimated bursting pressure of 1000 psi. you get a pressure relief valve and set it for oh say 800 psi, and on the outlet of the pressure relief valve you "cap" the pipe with a piece of aluminum foil or similar material and fire your gun if the alumminum foil is still there you didnt go over 800 psi and you "prolly didnt send steel shrapnel into your neighbors car at 500 mph
Fair enough. In which case the concept is sound but you'd be much better off going with a burst diaphram or similar rather than the relief valve. Oh, and yeah, tape works better than foil for the simple reason of handling/wind/etc.squarles2007 wrote:I was just throwing out some numbers for illustrative purposes
Okay, lets say were were about to record an event that lasts a short time. We expect to reach about 100 psi.D_Hall wrote:If it takes 0.05 s for your gauge's needle to spin from 0 to 100 psi when hit with a 100 psi event, that needle will only register events that last at least 0.05 s. If the event lasts for (say) 0.005 s, you're never going to know that you got hit with 100 psi.And why does the response time matter?
Looking at the data sheet (http://www.disensors.com/HTML/pdf/PE300.pdf) there really doesn't seem to be a sample rate spec. The closest I see is "Maximum measurement frequency at current output Hz approx. 1.3". That is way too slow, the gauge needs to respond within perhpas 1mSec for it to be of any real use for measuring the chamber pressure in a spudgun as it fires. That is the intended use isn't it?willarddaniels wrote:DigiBar PE 200 by HBM. This units give continuous pressure, tare function, stores min and max pressure in memory until cleared. Also graphs increasing and decreasing trends- If I ever should need to use that function...
It can be used in constant temps of up to 158 F.
Reads up to 1000 bar at a typical .1% calibration margin.
Battery operated, I also have the DC adapter.
I found some sites that reference it, but since I have the manual I haven't looked too hard.