Digi Cool & Tank Sat.

[Pascone10]

pressure and temp vary directly..

so if its virgin refer only, then the temp of the pipe will equal the pressure on a pt chart. if there is something else in the system then you wont have an exact pressure relationship. at least you shouldnt..

i think thats what he is doing..

[grayghost]

Exactly, Pascone

[sparky05]

I love doing the Experiments with my son (8 1/2yr)

I used to have no time and tons of energy. Now I have a lot of spare time and No energy.

Planing on 2010 being busy and fun with my Health and energy back[/QUOTE]

Continuing to think of you and remembering you in my prayers, remembered a sermon I heard a while back on the verse "it came to pass", so in time this too shall pass and 2010 is getting closer every day.

[steve3871m]

So, go out and get Digicools immediately?

Have been thinking of getting these... Went tho there web and not very much info and the difference between the 1250 and 1600.

I though the 1600 (higher#) wold be higher end unit,but they were less than the 1250. Going back to their webto see if I can figure out the difference.

[AtoZhvac]

pressure and temp vary directly..

so if its virgin refer only, then the temp of the pipe will equal the pressure on a pt chart. if there is something else in the system then you wont have an exact pressure relationship. at least you shouldnt..

i think thats what he is doing..

Hi

OK thanks for the reply. Im trying to wrap my mind around how the DigiCools can be used in the field to determine moisture in a system.

With what you have stated about temp and pressure relationship does this mean that in the field the only way to use the DigiCools for moisture detection is to power a system off and allow the system to sit for what 2 or 3 hours to allow all of the components in the refrigerant circuit like the compressor and the coils etc to cool off and thermally equalize with the refrigerant in the system,and then test the tubing temperature against a pressure chart for that particular refrigerant?

Would it logic that moisture would be likely to settle in a specific area and that would be the best place to test?

How about with the system running ?
Other than the fluctuation in pressures that often is observed if non condesables are in a system while running. Is there a trick with these Digicools that improves the ability at identifiying moisture in a system while it is running ?

Thanks

[sparky05]

Let me see if I can explain this, I have been told that with the system on to disconnect the compressor, leaving both indoor and outdoor fans running, attaching the gauges to the unit, the high side pressure should equal the outdoor air temp, if its 95 then high side should be 182 psig low side should equal to the pressure of the inside temp. R22 system.
This should also work with a system not running, I would be interested in hearing if there is a way to check this with the system fully functioning.

[fcs]

pressure and temp vary directly..

so if its virgin refer only, then the temp of the pipe will equal the pressure on a pt chart. if there is something else in the system then you wont have an exact pressure relationship. at least you shouldnt..

i think thats what he is doing..

You got it Pascone.

[fcs]

Let me see if I can explain this, I have been told that with the system on to disconnect the compressor, leaving both indoor and outdoor fans running, attaching the gauges to the unit, the high side pressure should equal the outdoor air temp, if its 95 then high side should be 182 psig low side should equal to the pressure of the inside temp. R22 system.
This should also work with a system not running, I would be interested in hearing if there is a way to check this with the system fully functioning.

Thats what I do.

[itsiceman]

pressure and temp vary directly..

so if its virgin refer only, then the temp of the pipe will equal the pressure on a pt chart. if there is something else in the system then you wont have an exact pressure relationship. at least you shouldnt..

i think thats what he is doing..

fcs do you remember roughly the range of the pressure difference with the "wet" samples ?

[fcs]

If memory sever right (thats If) within 2 to 15 ish I think. I'll have my son see if he can find the paper with the numbers.

Don't hold to much on my Memory lately (Kemmo Brian you know)

[fcs]

When I did it with the Digi Cool I used the DigiCool Probe. And it was quick to look a the SH reading. Also I like using the Digicool Temp Velcro Probe with long Velcro to Sat a tank.


I Try and find the number or do it again but Doing it again will most likely be in 2010 (after treatment is done.

[itsiceman]

If memory sever right (thats If) within 2 to 15 ish I think.

This is good enough fcs

I honestly don't see many "wet systems" like I did when I first started out

Everybody must be getting better at this stuff

[beachtech]

Let me see if I can explain this, I have been told that with the system on to disconnect the compressor, leaving both indoor and outdoor fans running, attaching the gauges to the unit, the high side pressure should equal the outdoor air temp, if its 95 then high side should be 182 psig low side should equal to the pressure of the inside temp. R22 system.
This should also work with a system not running, I would be interested in hearing if there is a way to check this with the system fully functioning.

if split system get more accuracy by pump down and just running OD fan