Nanomass Gas Density
Commissioning
Hauser
45
The activation function is available under "Device Settings"
→
"Service mode"
→
"Activate
software options". Once activated the "Concentration Measurement" application package is
permanently available in the measuring device.
To access the "Device settings" function area, you must enter the access code
0074
in the
"Access code for technician mode" field and then press "OK" to confirm. To be able to
access the functions of the "Service mode", the code
4685
for the service mode must be
entered.
10.8.3 General principles
Once the "Concentration Measurement" application package is activated, the measuring
device can output the concentration of a binary gas mixture. The concentration indicates the
quantity of a pure substance that is in a gas mixture. The density, pressure and temperature
measuring variables make it possible to calculate the concentration of a fluid using
thermodynamic models. If a gas mixture consists of two substances (e.g. methane and
carbon dioxide), the measuring device can calculate the concentration of one of the
substances (e.g. methane or carbon dioxide) and display this information.
10.8.4 Determining the coefficients
Your Hauser Sales Center can provide you with the coefficients that must be saved
in the measuring device to calculate the concentration. The following information is needed
to determine the coefficients:
• Composition (concentration range) of the binary gas mixture to be measured
• Temperature range in which the gas mixture is measured
• Pressure range in which the gas mixture is measured
The smaller the selected range of concentration, temperature and pressure, the better the
approximation of the coefficients and therefore the better the accuracy. The accuracy also
depends on the difference in density between the two substances in the gas mixture. The
bigger the difference in density, the more accurate the measured values. The measuring
device cannot calculate binary gas mixtures where both substances have the same density
(e.g. nitrogen and carbon monoxide).
10.8.5 Configuring the concentration
Settings for calculating a concentration can be made in the "Special Function" menu.
Navigation
1. Menu "Measuring variables
→
"Special units"
2. Menu "Special function"
→
"Density function"
Parameter overview with brief description
Menu "Measuring variables"
→
"Special units"
Parameter
Description
Selection/input
Factory setting
Text arb. concentration (4 char.)
Enter the text string for the arbitrary
concentration unit. The unit is then
available for selection as "Other 3D" in the
"Concentration unit" parameter in the
"Density function" menu.
XXXX (max. 4 characters)
"___" (no text)
Factor arbitrary concentration
Enter the quantity factor for the arbitrary
concentration unit. The factor changes
the original measured value from the
concentration specification.
6-digit floating point number and
a 1-digit exponent
1.0
