Real Mass flow: (f.i. kg/h). This refers to true mass units per time unit. The red-y
compact
can measure this and you can select this type of unit from the menu.
Normalized volumetric flow: Normalized means that the units are “translated” to
predefined pressure and temperature conditions. Normalized or Normal
Conditions refers to 0°C and 1013.25 mbar absolute. You can select this type of
unit from the menu of the red-y compact. These units are mostly used in Europe
and China.
Standardized volumetric flow: Standardized means that the units are “translated”
to predefined pressure and temperature conditions. Standardized or Standard
conditions refers to 20°C (68°F) and 1013.25 mbar (=760 mmHg) absolute. You
can select these type of units from the menu of the red-y compact. These units
are mostly used in the USA. Standardized can also refer to other reference
conditions (f.i. Natural Gas industry often uses 15°C and 1013.25 mbar
absolute. In the semicon world they often use 25°C and 1013.25 mbara. Please
define and mention these reference condition at the time of your order.
Please note that reference condition relating to Normalized or Standardized volumetric
flow are NOT the operating conditions. According to the ideal gas law, the gas volume
will change by 0.35% per K.
Please note that Vogtlin standard uses the following densities for their main 3 gasses:
Air: 1.293 gr/m3, N2: 1.2504 gr/m3, O2: 1.429 gr/m3 (All at 0°C and 1013.25 mbar
absolute). If you use other densities or need additional information for other gasses,
please contact the factory.
Densities need to be defined before manufacturing and cannot be adjusted once the
unit has been delivered.
1.16. CMOS technology
The red-y measuring and control devices are equipped with an innovative CMOS
semiconductor sensor that sets new standards for accuracy, speed and measurement
dynamics.
With our CMOS technology the sensor element, amplifier and A/D converter form a
single silicon chip.
1.17. Block diagram
The following GCM block diagram shows the structure of the device. The block diagram
does not show the optional manual control/needle valve (Model GCR) that would
normally be placed on the outlet of the unit.
Sensor
EEPROM
USB
Interface
Micro processor
Touch Display (dotmatrix 128x64 Px)
Power conditioning
By-pass
Turbulence filter
Figure 4: Block diagram