Digi-cools low side wont go over 200 psig

[rogerk]

Will they ever make a set of Digi-cools that will allow the low side to read over 199 psig? Why cant they use the same sensor for the low side that is used for the high side?

[bigmanmikey]

think it has something to do with the low side reading tenths... like 125.5 etc.. an dont think theres any ref that runover 199 psig on the low side :)

[acguytx]

think it has something to do with the low side reading tenths... like 125.5 etc.. an dont think theres any ref that runover 199 psig on the low side :)

except when you are trying to leak test with nitro 250-500 psi , nice to be able to stop the blinking :P :.02:

[bigmanmikey]

there was another posting about testing with nitro an what press seams like most guys around the 100 mark..

[rogerk]

there was another posting about testing with nitro an what press seams like most guys around the 100 mark..

I like 250 myself. I did an install yesterday where it held at 150 psig but I said give me more gas at which point a small pinhole leak blew at the evap suction line I brazed. Would it have blown open at 100? Glad I went up to 250.

[acguytx]

I like 250 myself. I did an install yesterday where it held at 150 psig but I said give me more gas at which point a small pinhole leak blew at the evap suction line I brazed. Would it have blown open at 100? Glad I went up to 250.

ditto if a system has the potential to run at pressures of 250(22)-450(410) then i cant see why you wouldnt test at those pressures? Nitro is cheap, fast and not hard to put in and take out of a system, plus gives me an extra flush on these conversions.

to each their own but i test higher..:cheers:

[itsiceman]

Why cant they use the same sensor for the low side that is used for the high side?They are both rated at .5% FS so if the full scale (FS) is lower the more accurate the sensor is reading. Plenty of guys like the accuracy the way it is. It is very accurate and I believe that accuracy is over the entire operating temp not just at room temp where some other gauges are listed.

Digi-Cool lists
Proof pressure: Tolerable pressure without internal damage
Low side: 600psia
High side: 1500psia

and Burst pressure: Tolerable pressure with out loss of seal
Low side: 2000 psia
High side: 5000 psia

A piping system should be pressure tested for strength and tightness.
You normally run the pressure up for a strength then test for tightness at a lower pressure over time.
Personally I use only the high side for any strength testing.
If you are testing for tightness you are much better off with a gauge with the most accuracy you can get like the low side of a Digi-Cool gauge :.02:

[itsiceman]

Here is a good article that was in the RSES Journal that Jim Bergmann wrote on pressure testing.

http://www.rses.org/assets/rses_journal/0710_Leak.pdf