Reference Manual
00809-0100-4731, Rev FA
April 2003
APEX
™
and APEX Sentry
™
Radar Gauge
3-20
Figure 3-10. Tank Bottom
Strapping Points
Standard Volume (Apex
Radar Gauge Only)
If standard volume is desired, an RTD must be installed and wired to the
APEX Radar Gauge. First, configure the gauge for actual volume as outlined
in the previous section and configure standard volume as the
secondary variable.
Enable RTD Input Enables the radar gauge to use the RTD input.
Enter Volume
Coefficients
Volume coefficients (K-Constants) are used to determine how temperature
changes affect volume measurements. If you do not know K-Constants for
your process and would like to measure standard volume, contact Rosemount
Customer Central at 1-800-999-9307 for further assistance.
Using 6 of the points at the bottom of the tank yields a
level-to-volume profile that is similar to the actual tank bottom.
Using only 3 strapping points results in a level-to-volume
profile that is more angular than the actual shape.
Actual tank bottom may look like this.
LEVEL-APEX_05A
HART Comm 1, 3, 5
HART Comm 1, 4, 3, 4
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