Delta Faucet DF-745 Manuel D’Utilisation

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User Interface                                                                     DF-745
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Figure 25: Calibrate Menu
7.4.3.1 Check/Adjust Zero
Figure 26: Check/Adjust Zero Menu
The Check/Adjust Zero screen displays many pieces of information including a live reading 
of moisture in ppb (or ppm) and the state of the zero gas control valves.  Also depicted are 
Zero Reference and Zero Offset values.
The Zero Reference value is a reflection of the deviation of the instrument’s baseline from 
what was set at the factory.  The zero reference of an instrument from the factory will be 
0.00.  After a manual or auto zero is performed, this value may change slightly.
If the moisture cell has been previously calibrated by the user, Restore Factory Zero will 
be enabled on this screen.  Enacting this will erase any user zero and restore the factory set 
point.
The User Zero Offset and Active Zero Offset are two mechanisms to modify the zero 
baseline. When the Active Zero feature is turned on, the User Zero Offset display is 
inactive and Active Zero Offset will be displayed instead. See page 57 for additional 
information on the Active Zero feature.