Metro DataVac M1 User Manual page 102

After validation with the OK button, the Preset button becomes red until you make the
preset :
b – Temperature compensation mode
When the « compensation mode » is activated, it is requested to enter the expansion
coefficient. As an information, on the below table you can see the coefficients of the
main materials (source Wikipedia):
Material
Aluminium
Brass
Stainless steel
Copper
Gold
Nickel
Iron or Steel
Carbon steel
Platinium
Glass
Tungsten
The compensation is done assuming that the master part has been measured at 20°C.
102
α in 10 /K at 20 °C
-6
23
19
17.3
17
14
13
11.1
10.8
9
8.5
4.5
The PRESET button becomes black again
after preseting.
The new reference temperature has now
been moved to the actual temperature.
Compensation mode
Expansion coefficient
If validated (green), a
new screen appears
allowing to set the
temperature of the
master's certificate.
M1 – M3 AG