Metro DataVac M1 User Manual page 16

The following table shows some frequent cases to define which restrictor will be the
most adapted to your application. In order to get the best linearity, the most important
is to get 2.7 BAR at the nominal (pressure indicated on the Setup menu, it is a relative
pressure from the atmospheric pressure, while the 3 BAR at the output of the
regulator is absolute)
If you order a turnkey solution at Metro, we will deliver the display with the adapted
restrictor, or with an integrated restrictor (see chap 3.3.8). But if you want to use the
M1 / M3 display together with your existing air gage, you will have to use the adapted
restrictor by your own.
It is advised to contact Metro or one of its distributors for advices or
confirmation around this subject.
Check this video for understanding the influence of the restrictor on the
linearity :
link to the video
Nozzle diameter in mm number of nozzles total flow surface in mm² Restrictor
0,3
0,4
0,5
0,6
1
2,07
0,3
0,4
0,5
0,6
1
0,3
0,4
0,5
0,6
1
Example :
Page 16
2 0,14
2 0,25
2 0,39
2 0,57
2 1,57
2 6,73
3 0,21
3 0,38
3 0,59
3 0,85
3 2,36
4 0,28
4 0,50
4 0,79
4 1,13
4 3,14
M1 – M3 Display units
Or scan the QR code :
0,3
0,4
0,4
0,5
0,7
0,9
0,3
0,4
0,5
0,5
0,7
0,4
0,4
0,5
0,5
0,7