Instruction manual
Technical Information
Page
9
Chapter
03
Vögtlin Manual
red-y compact series
Measurement Ranges
Red-y
measurement and control devices are supplied with standard measurement ranges for air. As
an option, the devices are available with individual measurement ranges and, upon request, can be
calibrated with other gases.
Standard Measurement Ranges
Code Meas. range Unit Code Meas. range Unit
A4 200 mln/min C4 20 ln/min
A5 500 mln/min C5 50 ln/min
B4 2000 mln/min D3 100 ln/min
B5 5000 mln/min D4 200 ln/min
Connector Assignment
Instruments with the switch or external power supply are fitted with a cable (2m length) with the
following assignment:
Color Assignment Color Assignment
white + 24 Vdc grey AL1 normal open
brown 0 Vdc pink not assigned
grenn AL1 common blue not assigned
yellow AL 1 normal closed red not assigned
Conversion Factors for other Gases
Every instrument is fully and automatically calibrated on an ultra modern calibration system. The
internal conversion to the defined medium is done according to the application. Should you change
the mass medium, this may be corrected via conversion factors.
For this, contact your
Insentys
sales partner. Depending on the medium, these conversion factors
generate an additional measurement error.
Note
In the case of plant calibration with a gas other than air, an increased zero offset may be displayed
when the device is not operated with the calibrated gas.
Pressure Loss
The thermal mass flow meters feature little pressure loss. This essentially depends upon the
medium, operating pressure and the flow rate. In the annex (chapter 08/page 19) you will find a
table that shows the typical course of pressure loss in air, 20°C, 1,013 bar a for the three
measurement devices. The pressure loss for other gases can be calculated using the formula.
Please note that pipes that are two small and unsuitable fittings are often the cause of excessive
pressure loss in the system.
For trouble-free operation, devices with manual control valve require a certain pressure differential,
which is specified on the nameplate.
© Vögtlin Instruments AG
P
required
required
=Δ
250.1
ρ
PΔ ×
Version
compact_E4_0