Bought the 557 2 weeks ago, put it to the test and the microns readings are way lower than actual, it was reading between 500 to 0 microns when the actual pressure was over 1000 microns, I going to compare the pressures and temperatures readings next.
Testo-557 micron measurement are way off
1 reading
valdelocc
41 - 60 of 63 Posts
Joined
·
3,004 Posts
at least yours reads something!
Sounds like a wining combo
Joined
·
1,816 Posts
Are any digital refrigerant manifold w/ vacuum reading - trustworthy?
My Yellow Jacket digital manifold has a separate vacuum sensor with cord that plugs into the manifold. It works good.
Joined
·
1,904 Posts
No. Unless it has a separate sensor like the YJ's.
The two biggest enemies to a micron gauge are positive pressure and oil. If you're using your manifold for anything other than an art piece - the internal micron sensor will be exposed to large amounts of oil and several hundred pounds of positive pressure per day.
I just can't see how any digital gauge with a built in micron gauge can stay clean (free of oil) and remain accurate.
I just got the Testo 557 and thought I would look to see the experiences of others.
Brent I can see your reasoning in thinking that the pressure and oil can have bad effects on the sensors. If this is the case,then I'm thinking that my new unused set should be more accurate. If not,then there must be other issues. Testo recommends blowing the gauge ports out with compressed air occasionally.
The only thing I have to compare is a yellow jacket digital I've had now for quite some time. I don't have the most faith in it either.
I have never pulled a vac seperate from my gauges. I can see the benefit though.
I think the thing that has me the most concerned is in reading the Testo manual it says that if the gauges are ever dropped or even as much as bumped hard, then you need to send them back for recalibration....really?.....maybe I'm a little rammy sometimes but even with a girl touch sometimes things get bumped in our trade. I can't see me not bumping this thing or NOT at one point seeing it come off the place I hooked it and drop. I'm not talking a 10ft. fall here, but my analog set sometimes come off and fall say 18" onto the dirt.
I'm almost afraid to touch this baby
Brent I can see your reasoning in thinking that the pressure and oil can have bad effects on the sensors. If this is the case,then I'm thinking that my new unused set should be more accurate. If not,then there must be other issues. Testo recommends blowing the gauge ports out with compressed air occasionally.
The only thing I have to compare is a yellow jacket digital I've had now for quite some time. I don't have the most faith in it either.
I have never pulled a vac seperate from my gauges. I can see the benefit though.
I think the thing that has me the most concerned is in reading the Testo manual it says that if the gauges are ever dropped or even as much as bumped hard, then you need to send them back for recalibration....really?.....maybe I'm a little rammy sometimes but even with a girl touch sometimes things get bumped in our trade. I can't see me not bumping this thing or NOT at one point seeing it come off the place I hooked it and drop. I'm not talking a 10ft. fall here, but my analog set sometimes come off and fall say 18" onto the dirt.
I'm almost afraid to touch this baby
Joined
·
203 Posts
Actually, in my Testo 570 manual it tells you that annual recalibrating is recommended. As far as dropping it, here's what it says in my manual:I think the thing that has me the most concerned is in reading the Testo manual it says that if the gauges are ever dropped or even as much as bumped hard, then you need to send them back for recalibration....really?.....maybe I'm a little rammy sometimes but even with a girl touch sometimes things get bumped in our trade. I can't see me not bumping this thing or NOT at one point seeing it come off the place I hooked it and drop. I'm not talking a 10ft. fall here, but my analog set sometimes come off and fall say 18" onto the dirt.
I'm almost afraid to touch this baby
If the measuring instrument falls or another comparable
mechanical load occurs, the pipe sections of the refrigerant
hoses may break. The valve positioners may also be damaged,
whereby further damage to the interior of the measuring
instrument may occur that cannot be identified from the outside.
The refrigerant hoses must therefore be replaced with new,
undamaged refrigerant hoses every time the measuring
instrument falls or following any other comparable mechanical
load. Send the measuring instrument to Testo Customer
Service for a technical check for your own safety.
Since the manifold is the heaviest part of the unit, it would make sense that it would hit the ground first. I still dont use my 570 for vacuum at all. I use the Appion CRT's, the large Appion hoses and my pump for vacuum.
Joined
·
203 Posts
I still wish I had never heard of Testo. :.02:
Joined
·
203 Posts
I still have had absolutely (Zero) problems with mine in the two years I have had them. (Almost two years) Just out of curiosity, what happened with yours????
Ok just one of the clamps on the 570's I use them for back up. The Vacuum gauge is what really soured me on Testo. The customer service wasn't.
Every time i read these posts, i find myself saying "buy some digicools already". They aren't the sexiest, but at least you can drop them and not worry about needing a re-build. So what it you need a separate micron gauge, at least it won't be subjected to all the other stuff your gauges go through when you aren't pulling a vac.
To me sounds like testo owners are some of the best digicool sales people.
Sent from my GT-I9000M using Tapatalk 2
To me sounds like testo owners are some of the best digicool sales people.
Sent from my GT-I9000M using Tapatalk 2
That or Sman.
Joined
·
1 Posts
My microns are way off as well. It would be reading 5000 on testo and the actual vacuum is 320
Sent from my SAMSUNG-SM-G891A using Tapatalk
Sent from my SAMSUNG-SM-G891A using Tapatalk
41 - 60 of 63 Posts
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
