Trouble Shooting; The Measurement With An Air Gage Is Not Linear; The Measurement With An Air Gage Is Drifting; Stabilization Of The Measurement With An Air Gage Is Very Slow - Metro DataVac M1 User Manual

M1 – M3 AG

17. TROUBLE SHOOTING

17.1. The measurement with an air gage is not linear

The linearity of the measurement depends mainly on the pressure.
It is important to have an input pressure of 3BAR (0.3MPA), and to have 2.8 BAR with a
nominal part (Check and adjust the pressure from the SET UP menu by pressing
Position the bar unit is displayed and the adjustment can be made. After 10s the unit
returns to that of the measurement (cm / inch...)). If the pressure with a nominal part is
too low, a larger nozzle must be fitted and vice versa.

17.2. The measurement with an air gage is drifting

There can be several causes:
- When the air starts to circulate in the air gage, a temperature variation occurs, which
generates a dimensional variation depending mainly on the size of the air gage.
It is therefore recommended to allow air to circulate in the air gage a certain time before
calibrating, in order to allow it to stabilize in temperature.
- If the air gage is dimensionally very close to the part and the part is covered with oil for
example, the air will remove the oil slowly and the measurement will drift slowly.
- It is important to use the regulator provided by Metro. Using a standard regulator will
cause variations in measurements synchronous with the variations in pressure on your
air network.

17.3. Stabilization of the measurement with an air gage is very slow

- check the point 17.2 (the measurement drifts)
- There are 2 types of wiring. The wiring with integrated nozzle allows faster stabilization
of the measurement, but your air gage must be designed like this. Metro can provide
you with a turnkey solution. If the cycle time is important, we have solutions to
accelerate.
- The length of tubes between the air gage and the M1/M3 AG module is very important
and has an impact on the stabilization time. The longer the pipe, the longer it will take
for the measurement to stabilize.

17.4. The upper band of the display unit is red

This means that the pressure sensor is damaged, the module or the display unit must
be returned to Metro.
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