|
|
Post by biomedfossil on Jun 15, 2023 17:01:22 GMT
I was wondering the best way to tell if your test gauges are truly accurate. I have been having some weird issues with my machines and I am thinking it may be my big pressure gauge we use for D and F pump pressures.
The atmosphere pressure starting out is in the 0psi window but it's on the very edge of the big line closest to negative readings. I was just wondering if there is a way to adjust the needle so it will be centered on the 0 parameters.
I have had machines com back for low flow then I have to increase the dac -5 to 8psi. The a month or so later it will come back for something else that I have to check pressures and I then have to increase it.
|
|
|
|
Post by Chuck Weddle on Jun 15, 2023 17:17:57 GMT
If you can put your reference meter inline with your gauge at the same time.....8 psi is roughly 414 mmHg (413.719).
|
|
|
|
Post by bcjammerx on Jun 17, 2023 19:40:22 GMT
I was wondering the best way to tell if your test gauges are truly accurate. I have been having some weird issues with my machines and I am thinking it may be my big pressure gauge we use for D and F pump pressures. The atmosphere pressure starting out is in the 0psi window but it's on the very edge of the big line closest to negative readings. I was just wondering if there is a way to adjust the needle so it will be centered on the 0 parameters. I have had machines com back for low flow then I have to increase the dac -5 to 8psi. The a month or so later it will come back for something else that I have to check pressures and I then have to increase it. when was your gauge last calibrated? |
|
|
|
Post by biomedfossil on Jun 20, 2023 10:36:45 GMT
The gauges I use for the LP, F and D have never been calibrated.
How do you calibrate gauges?
|
|
|
|
Post by guest on Jun 20, 2023 16:14:51 GMT
You don't calibrate, just buy new gauges. It's simpler and more cost effective. I replace my gauges every 2 years even if they read 0. They can still be used as back ups if I don't have my gauges b/c I left my tool bag at home or at the other clinic.
|
|
|
|
Post by biomedfossil on Jun 21, 2023 13:40:19 GMT
I went ahead and replaced the gauges.
I have learned something though.
I wanted to make the tubing attached to gauges a little longer. When I did it seemed to affect the pressures quite a bit.
Very interesting..
Thank everyone for your help..
|
|
|
|
Post by bcjammerx on Jun 26, 2023 22:20:33 GMT
The gauges I use for the LP, F and D have never been calibrated. How do you calibrate gauges? my bad, was thinking of electronic pressures gauges |
|
|
|
Post by gnurk on Jun 27, 2023 17:24:56 GMT
i also noticed that if you use the white high pressure tubing with the usual gauge the reading will be different than when you use the original tubing, very interesting
|
|
|
|
Post by kendec65 on Jul 12, 2023 14:48:42 GMT
we send our gauges out yearly to be certified by Spectrum.
|
|
|
|
Post by SrCusEngr on Jul 13, 2023 23:56:09 GMT
Well, if you truly want to dig into it, if there is water in the tubing attached to a gauge, that small column of water will exert some pressure to the membrane of the gauge. That is physics 101. Also, how flexible is that tubing. Silicone tubing is more "breathable" than braided tubing. If the tubing expands slightly, the energy causing the expansion is lost to the membrane, hence the meter reads differently.
|
|
