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25 TEMPERATURE
This menu sets up the temperature compensation parameters. Temperature has three submenus: Fixed, Monitor,
and Scale.
FIXED (FIXED TEMPERATURE)
•
Fixed allows you to enter a fixed temperature, usually to match the temperature inside the vessel where
the transducer is operating. The controller then adjusts the speed of sound in the calculations to
correspond to that temperature. Fixed has two submenus:
–
If you select Yes, the controller asks for the fixed temperature.
–
If you select No, the controller disables the fixed temperature function. If you have a temperature
compensation probe, controller uses the probe's temperature data to adjust the speed of
sound in the calculations. If there is no probe, the controller uses the speed of sound at the
default temperature.
MON (MONITOR)
Mon lets you monitor the temperature (Temp), the A to D counts (ADC), and the minimum and maximum
temperature (MinT and MaxT) since the last reset. The value for Temp is based on the following:
•
If you selected Yes for FixT, the temperature that you entered in that menu displays for Temp.
•
If you selected No for FixT and there is no temperature compensation probe, the default temperature
displays for Temp. if there is a temperature compensation probe, the measured temperature displays for
Temp.
To reset MinT to the current temperature, press the Enter Key while in the MinT function. To reset MaxT to the
current temperature, press the Enter Key while in the MaxT function.
SCALE
Scale lets you select Celsius (°C), Fahrenheit (°F), or Kelvin (°K) as the temperature scale for entering a
temperature (in FixT) and monitoring the temperature in Mon.
26 LINEARITY
Linearization tables allow us to compensate for vessels that do not have a linear relationship between level
and weight (or level and volume). For example, the vessel has a cone bottom, and we are interested in weight
or volume information instead of level information. An increase in the level does not produce a proportionate
increase in weight or volume, because of the shape of the vessel.
The SonoTracker Series has the capability to linearize up to 32 points. The more points of linearization you
provide, the more accurate the system will be. Linearity has four submenus:
•
Set — allows you to set the values for the linearization. For each point, you enter a input and an output value.
•
Default — changes the values in the linearization table back to the default values. Note that for the
default condition the input and output values are identical. Therefore, for the default condition the
linearization table has no effect on the SonoTracker Series, even if linearization is enabled.
SON280020 Rev. C
55
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