YSI Data Scout Advanced - Manual (Page 64)

YSI Incorporated Data Scout Advanced 60
The Configure | Zero (HiLi Xdcr) menu item is the first item in the next menu section. It opens the following window:
Figure 4.50
It is important that the vent tube of each affected vented Level Scout be exposed to atmospheric pressure when this
function is executed. Also, no pressure can be applied to the affected transducer(s) when this function is executed
unless you wish that pressure to subsequently read zero. Running this procedure frequently will guarantee that the
transducer(s) operate at best acquisition accuracy. This function should not be used on absolute Level Scouts and
will be ignored by the transducer if attempted. Instead, use the Configure│ Field Offset function for absolute
Level Scouts.
NOTE:
The text box of this dialog window shows the current value of the Factory Pressure (in psi) that was just read from the transducer. It
would normally be a value “near” zero for a vented Level Scout and a value need atmospheric pressure for an absolute Level Scout.
Unlike the other option view/edit functions already shown above, it is unnecessary to click the text box to edit the original value
shown. Instead, simply click the OK button to re-zero the differential transducer(s). Click Cancel if you do not wish to re-zero the
transducer or if you have an absolute Level Scout.
The effect of a re-zero will not be seen in subsequent Factory Pressure measurement values. It will be seen only in subsequent
Transducer Pressure (units-selectable) measurement values. Actually, the re-zero operation stores the Factory Pressure at zero as the
new Field Offset coefficient which can be observed by viewing the Field Offset coefficient separately after the re-zero adjustment is
completed.
The final items in the final section of the Run window’s Configure menu are for the AutoLog. These were described in section 4.2.5.