Batch Controller RA33
Commissioning
Hauser
29
Miscellaneous notes:
• The pressure is entered relative to the ambient pressure. Since the pressure only has a marginal
effect on liquids, for the sake of efficiency it suffices to specify a value instead of measuring the
pressure.
6.2.4
Batch controller with API temperature/density compensation
This application describes the use of the batch controller with mineral oils and volume correction.
The second volume correction application describes the process for correcting the volume by mea-
suring both the temperature and the density.
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Fig. 27:
Batch controller with flow measurement, temperature compensation, density compensation and 2-stage
batching
Input signals:
Flow, (pulse input or current input)
Temperature (RTD or current input)
Density (current input)
Output signals:
Valve control (relay or open collector)
Pump control (analog output, relay or open collector)
Required settings:
a.
Flow input: Enter pulse value or measuring range of the 0/4 to 20 mA input.
b.
Temperature input: Select the RTD type and temperature range or enter temperature measur-
ing range for the 4-20 mA input.
c.
Select the product group of the mineral oil.
d.
Select the type of density measurement: The "Operating density" is set to "Measured" since a
density meter is used in this application example.
e.
Select the reference density: The reference conditions of the corrected volume must be
assigned for the reference density. Here, the volumes at 15°C, 20°C and 60°F can be selected.
f.
Valve control: Set the choice of filling stages to 2-stage. Assign the selected output to control
the filling stage.
Display variables:
Preset counter (corrected volume), batch counter (corrected volume), volume flow, daily, monthly
and annual counters and totalizer for batched quantity, number of batches.
