Autozero provides the most 
accurate measurements, but requires 
additional time to perform the zero 
measurement. With autozero 
enabled (On), the GDM-9060/9061 
internally measures the offset 
following each measurement. It then 
subtracts that measurement from 
the preceding reading. This prevents 
offset voltages present on the 
GDM-9060/9061’s input circuitry 
from affecting measurement 
accuracy. With autozero disabled 
(Off), the GDM-9060/9061 
measures the offset once and 
subtracts the offset from all 
subsequent measurements. 
When turning On the Auto Zero, the display 
shows an icon    indicating the Auto 
Zero mode is currently being activated. 
Press the F4 (Unit) key to enter the Temperature 
Unit menu followed by clicking the F1 – F3 key to 
choose desired temperature unit. See the figure 
shown below.