Technical Data - bürkert MassFlowController MFC Installation Und Bedienung

TECHNICAL DATA

Technical and electrical data
Operating conditions Types 8710 and 8700
Ambient temperature -10 to +50 °C
Medium temperature -10 to +70 °C
Type of protection IP 50
Installation position see calibration protocol
Electrical data Types 8710 and 8700
Operating voltage 24 V DC ±10 %
residual ripple < 5 %
Relay outputs 1 potential-free changeover
25 V, 1 A, 25 VA
Measurement precision* ±1.5 % o. R. ±0.3 % F. S.
(after 30 min. warm-up)
* The specified precision will be obtained only when, after
switching on, the thermal equilibration process have been
completed and the device has reached its operating temperature.
INSTALLATION AND OPERATION
General notes on installation and operation
Before installation:
• Install a suitable filter upstream to assure cleanliness of the
operating medium.
• Observe the installation position (see calibration data).
• Provide a power supply with adequate power.
• Observe the max. residual ripple on the operating voltage.
• Remove dirt from the piping before installation of the MFC.
Proceeded in the following sequence on commissioning am MFC /
MFM:
1. Mechanical and fluidic installation
2. Electrical installation
3. Pressurize with operating medium
4. Regular working operation
Fluidic installation
Select the available fluidic connections to match the maximum
flow rate. Intake sections are not required. If necessary, we can
also supply special sizes, whereby the dimensioning of the fluidic
system with regard to flow and pressure drop must be taken into
account.
Screw joints
The device can on request also be supplied with screw-in joints
alredy assembled. Please select the corresponding screw joints
from the table in the annex to the Operating Instructions.
INSTALLATION AND OPERATION
Electrical connection
To assure electromagnetic compatibility (EMC),
connect the housing via as short a cable as possible
(with as large a cross-section as possible) to the
functional earth (FE).
The GND or mass conductors for all signals of the
MFC / MFM must in all cases be led individually to
the MFC. If all GND signals are bridged directly at
the MFC and only one common conductor is led to
the switching cabinet, signal displacements and
disturbances (pulses, oscillations, etc.) to the
analog signals may result.
The MFCs / MFMs are operated with 24 V power supply. Select
the connectors cross-section according to the valve used and as
large as possible (see Technical data ). Suitable connecting cables
are to be found in the table in the annex to the Operating
Instructions.
➔ Connect the functional earth (FE) to the marked screw, e.g.
using round pliers.
With fieldbus devices of this type the fieldbus address is set via
the turn-switches on the back of the device.
LSB ➔
least significant bit x 1
MSB ➔
most significant bit x 10