Metro DataVac M1 User Manual page 90

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.
If it is not the case, select the option "advanced" and a next page appear, allowing to
enter the temperature of the master during the measurement according to its certificate:
Page 90
M1 – M3 Display units
Compensation mode
Expansion coefficient
If validated (green), a
new screen appears
allowing to set the
temperature of the
master's certificate.
α in 10 -6 /K at 20 °C
23
19
17.3
17
14
13
11.1
10.8
9
8.5
4.5
Temperature indicated
on the certificate
Reference temperature