Batch Controller RA33
Commissioning
Hauser
43
6.4
Optional device settings/special functions
• Compensation
• Batch printout
6.4.1
Compensation
Measured volumes can be corrected or converted to mass using the additional compensation func-
tion. Depending on the type of compensation, temperature and density sensors are required for this
purpose.
The use of the temperature and density inputs is shown in the table below using the measured prod-
uct group (mineral oils or other) as are the expected results.
!
Note!
Volume correction via temperature measurement and/or density measurement is possible for both
product groups. The advantage of an additional density measurement is that the system reacts to
fluctuations in the medium independently. If the correction is based on temperature measurement
alone, the density value of the medium must be checked at reference operating conditions where
necessary and adjusted.
Product group
The choice of product group determines the calcuation standard at the same time. In the case of
user-defined media, a volume can be corrected or converted to mass using other parameters. The
volume is corrected in accordance with the API MPMS (Chapter 11) standard for the following min-
eral oil product groups: crude oil, refined products and lubricating oils.
Reference data
The reference condition specifies the ambient conditions at which the correction must be calcu-
lated. The options available for selection are 15 °C, 20 °C or 60 °F.
The value that must be entered in the reference density parameter is the density of the medium
under the selected reference operating conditions.
An expansion coefficient must be specified depending on the calculation and if density measure-
ment does not take place. It must be entered in the unit 1/°C or 1/°F depending on the reference
conditions. According to this, a reference condition in °C gives rise to an expansion coefficient also
in 1/°C. In this case, the expansion coefficient is a factor by which the volume increases if the tem-
perature of the medium is one degree higher than the reference condition.
Pressure specifications
The pressure must be taken into account for a complete correction of the volume. The relative pres-
sure, in relation to the ambient pressure at which the flow of the medium is measured, must be
entered in Setup. Direct measurement is not required as the influence of pressure is relatively low.
Entering the approximate pressure is adequate for the level of accuracy required. Pressure compen-
sation can be disabled by entering a value of 0 for pressure.
6.4.2
Batch printout
Refer to the section on the printer interface,
42.
Product group
Expected result
"Operating den-
sity" setting
Temperature sensor Density sensor
User-defined
Mass
Measured
Not required
Required
Corrected volume
Calculated
Required
Not required
Measured
Not required
Required
Mineral oils
Corrected volume
Calculated
Required
Not required
Measured
Required
Required
