User Interface DF-745SG
39
A relay is available on the Analog Output Setup Screen (see page 53) to signal that
a zero calibration is taking place, and the analog output signal can also be frozen
or allowed to update during the calibration process.
Figure 24: Check/Adjust Zero Screen
7.4.4.1.1 User Zero Offset
Figure 25: User Zero Offset
The User Zero Offset function enables the user to add a given moisture ppb value
to the displayed concentration. This can be useful in preventing negative readings
to be displayed should the baseline drift below the calibrated zero point. The value
does not affect zero calibration, it is simply added to the calibrated zero. For
example, an offset of 1.0 ppb could be put into a system reading 0.0 ppb to allow a
chart recorder attached to the output to read slightly above zero. Under this
condition, the moisture reading would be 1.0 ppb.
Use the arrow keys (
and
to highlight
Enter User Zero Offset
in the
Check/Adjust Zero screen, Figure 24, hit the
Enter
key on the front panel, and the
zero offset box will appear on the screen as shown in Figure 25. With the left and
right arrow keys move the cursor to the right of the digit you want to change.
With the up and down arrow keys set the number to the desired value. When done
Summary of Contents for NanoTrace DF-745SG
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Page 86: ...80 DF 745SG Appendix A User Menu Screens Page 47 Page 49 Page 52 Page 53 Page 55 Page 56 ...
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