Thermo DCT7088 - 3.17 DIAGNOSTICS Submenu

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.....Additional setup menus within the DATA LOG submenu
2. Interval menu (81): Data log intervals must be entered in whole seconds, with a minimum interval of 1
second (Figure 3.16-F, below).
FIGURE 3.16-F
3. View menu: Use this menu to view which log files are stored in memory, the file sizes, and amount of
log memory still available. Additionally, use this menu to delete log files:
a. Access Menu 80, and select View.
b. Scroll through the log file with the UP/DOWN ARROWS to locate the file you want to delete.
c. Press ENTER, and Figure 3.16-G (below) is displayed.
d. Press 5, and Figure 3.16-H (below) is displayed.
e. Press . (decimal point), and Figure 3.16-I (below) is displayed informing you the log is deleted.
FIGURES 3.16-G THROUGH 3.16-I (LEFT TO RIGHT, TOP TO BOTTOM)
3.17 Additional Setup Menus Within the DIAGNOSTICS Submenu
*Not included in the Quick Setup configuration
The DIAGNOSTICS submenu contains various view-only menus which display important diagnostic
parameters that are currently used or calculated by the flowmeter. These parameters are helpful when
configuring or troubleshooting the flowmeter.
1. Signal Strength/Margin display (90): Displays the signal strength in percentage and the margin. The
signal strength value displayed is the average of the signal strengths for the upstream and
downstream transducers. Margin is an indicator of signal quality and is generally greater than 5%.
Signal strength is generally greater than 3% under good measurement conditions (Figure 3.17-A,
page 31).
2. Delta Time/Fluid Sound Speed display (91): Displays the value for DeltaT and the fluid sound speed as
measured by the flowmeter. DeltaT is the difference between the upstream and downstream travel
times, expressed in nanoseconds (ns) (Figure 3.17-B, page 31).