Delta NANOTRACE DF-745 Instruction Manual download pdf (Page 46)

42 DF-745 User Interface

7.4.4 Data History Routine

Figure 30: Data History Menu

The Data History Screen (Figure 31) enables the user to see the data history displayed in

strip chart form on the front display. By default, the data history screen displays data for the

most recent 24 hour period sampled at 1 point per minute (fixed) and the y-axis is auto-

scaling.

The Next button can be used to toggle the X axis from 1 day (default), to 1 hour, to 1 week

and then to 3 weeks.

The Next button can also toggle the cursor to the max and min values on the Y axis and the

arrow keys can then be used to adjust the values, and the display will actively update.

The data history may be downloaded to a USB memory stick, by using the Next key to

move to the Download box and hitting ENTER. A screen will appear, requesting that a

memory stick can be placed in the external USB socket. The socket is located behind the

front door on the left side of the chassis.

The downloaded file will be in tab delimited form and will be all moisture data in the system

up to 3 weeks old if available. The download process will take up to 15 seconds and the

display will indicate downloading is in progress. Once the download is complete, control of

the analyzer is returned to the operator. See Figure 33 for an example of a portion of a

download taken between the dates of May 1 and May 22. The complete file covers three

full weeks.

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Delta NANOTRACE DF-745 Instruction Manual Page 46