Monitor; Dashboard - Honeywell SLG 700 User Manual

7.9 Monitor

7.9.1 Dashboard

Figure 28: HART DTM Dashboard
The dashboard displays the current state of the system, including the state of the transmitter and
the associated readings and number of active alarms.
Signal Quality:
This variable indicates the degree of match between the reflection model and the live echo curve
data. This value is 1 minus the objective function value (see section 7.8.6) and values close to 1
represent a very good match. If this number drops too low the reflection models should be
checked as described in section 7.8.7.
Signal Strength:
This variable indicates the amplitude of the indicated reflection. The level and interface reflections
are negative, therefore a lower higher value indicates a larger amount of the radar energy was
reflected which should provide a good signal to noise ratio. If this value drops too low the
transmitter may not be able to reliably track the associated level. A good reflection should be
approximately the same size as the gain for the correlation model peak: the acceptable values are
dielectric constant and range dependent. Good values are in the range between -500 and -9000
counts.
When the tank is empty or nearly empty, the reported Signal Strength and Signal Quality for
Surface and Interface will instead be the ones for the End of Probe reflection.
SLG 700 Series HART Option User's Manual
Page 112 Revision 5