Operating Manual
Universal Flow Computer UR06
Bopp & Reuther
A-EN-08728-URRev.B
Subject to changes
Page 39 of 55
Messtechnik GmbH
17.8.2 Table
The flow rate characteristic line can be linearized via up to 15 table points. The flow rate in % of the
nominal flow and the deviation to the ideal characteristic line in % are entered.
The sequence of the measuring points is freely selectable. If the flow rate is outside the maximum and
minimum measuring point, the next measuring point is used for the correction. Linear interpolation
occurs between the measuring points. Flow rate 0 is entered for unoccupied points.
Range:
Flow rate 0 … 120%
Error -999 … +99%
17.9 Inputs
17.9.1 PT inputs
Selection of the temperature sensor type.
Selection: PT100, PT500, PT1000
17.9.2 Current input level
Selection of the current input level.
Selection: 0 ... 20 mA,
4 ... 20 mA
17.9.3 Digital input level
Selection of the digital input level. U Lo is for voltage signals with a low level (e.g. 5 V), U Hi is for
voltage signals with a high level (e.g. 24 V) and O.C. is for passive signals (e.g. Open Collector,
NAMUR, relay). For details about the levels see “Measured variable input”.
Selection:
U Lo
U Hi
O.C.
U Lo low pass
U Hi low pass
O.C. low pass
17.10
Fluid
17.10.1 Fluid
Selection of the fluid. The density, enthalpy and dynamic viscosity for standard media are calculated
according to internally defined methods. The polynominal coefficient for the relevant measuring range
has to be determined and entered separately for special media. Saturated steam can be pressure (P)
or temperature (T) controlled.
Selection:
Water
Steam
Natural gas
Saturated steam T
Air / Gas
Special fluid
Saturated steam P
Air / Gas ReKw
Mineral oil
17.10.2 Standard density
The standard status density (T=273.15 K and P=1.01325 bar) is entered here for air or other gaseous
media. Water and steam are calculated internally with the respective fixed values. The setting in the
menu “Mineral oils” is used for mineral oils.
Range:
0.5 kg/m3 ... 2,000.0 kg/m3
17.10.3 Base pressure
The pressure for the status on which the conversion is to be based is entered here.
This is of interest where, depending on the application, various “standard statuses” are common (e.g.
air 1 bar). The calculation is carried out for all the media.
The base pressure and base temperature are used to internally calculate the base density.
Range:
0.5 bar ...
1.01325
… 20.0 bar
17.10.4 Base temperature
The temperature for the status on which the conversion is to be based is entered here.
This is of interest where, depending on the application, various “standard statuses” are common (e.g.
