Commissioning
Batch Controller RA33
28
Hauser
6.2.3
Batch controller with API temperature compensation
This application describes the use of the batch controller with mineral oils and volume correction.
The volume can be corrected by simply measuring the temperature, or by measuring the tempera-
ture and density. The first application example describes the measurement process using tempera-
ture compensation only.
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Fig. 26:
Batch controller with flow measurement, temperature compensation and 2-stage batching
Input signals:
Flow, (pulse input or current input)
Temperature (RTD or 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: Since the density is not measured, the "Operating den-
sity" parameter has to be set to "Calculated".
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.
Reference density value: In addition to the reference operating conditions, the actual density
value of the medium under the selected reference operating conditions must be specified.
g.
Pressure: If the relative pressure differs from the ambient pressure, you must enter a pressure
at which the flow is measured.
h.
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.
