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OPERATING MANUAL HPC & UMC4
14.6.14 Operating pressure
This function has been prepared for the consideration of gas equations for the measurement of reference
density and volume for gases. In this software version, it will not be used for calculations.
operat. pressure
001.00 bar
The current value process pressure will be displayed in bar. As mentioned in Section 13.4.3.2 Input win-
dow/modify a value, the operator can change the value.
14.6.15 Density calibration hot medium
A single point density calibration can be made with a suitable mass flow sensor by the operator. The pro-
cedure is described in detail in chapter 15
“Density calibration” at page 94.
With this function the necessary measurement of the resonant frequency and the medium temperature is
made. The sensor must be filled with a liquid medium. At a temperature of e.g. 60 °C hot water can be
used as harmless medium or better use the usual medium under normal operating conditions.
Frequency/temp.
measure? [no]
According to the description in chapter 13.4.3.1
“Selection window/make a selection” the selection can be
switched to “yes” and the measurement is executed.
14.6.16 Measured values hot medium
The values of the function “Density calibration hot medium” above are displayed in the upper line. Press-
ing 2 times the green Enter-key (
„Enter“) confirms them without any change. Afterwards the density of the
measured medium has to be entered as reference in the lower line.
60.50°C 166.409 Hz
Rho = 0994,1 g/l
The density is always entered in the unit g/l (equivalently too kg/m³). According to the description in chap-
ter 13.4.3.2
“Input window/modify a value” the value can be entered.
14.6.17 Finish density calibration
In order to accomplish and store the density calibration by both preceding functions it is necessary to
complete some internal calculations.
Calculate?
[no]
According to the description in chapter 13.4.3.1
“Selection window/make a selection” the selection can be
switched to “yes” and the reference values for the density measurement are taken over. Thereupon to
activate density measurement it must be switched on as described in 14.6.1
