Measuring setup and installation
42/14-42-EN Sensyflow
FMT700-P
33
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7 Measuring setup and installation
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The flowmeter sensor has been designed for maximum measuring accuracy while at the same
time being easy to use. Nevertheless, certain boundary conditions must be observed to ensure
the best possible absolute accuracy and reproducibility.
Maximum measuring accuracy is achieved by calibrating the measuring section together with
the flowmeter sensor (achievable accuracy: m = ± 1 % from measured value).
By identifying the correct honeycomb/sieve combination on the basis of calculations as well as a
process of trial and error, you can steady the flow with a view to minimizing the effect of inlet
conditions on the probe characteristic.
The flowmeter sensors are calibrated in the horizontal mounting position. The signal is only
slightly dependent on the mounting position.
Optimum measuring section setup:
Air filter
FMT700-P
G00981
Undisturbed inlet section
10 x D
Undisturbed
outlet
section 5 x D
Fig. 23: Preferred setup for a measuring section involving the Sensyflow FMT700-P
Important (Notice)
• The flow direction of the measuring fluid must match the arrow on the probe.
• Particles and fibers can impair measuring accuracy. We therefore recommend that you use
an air filter from our range of accessories for filtering purposes (see section 9.4). The use
of suitable air filters is essential to ensuring desirable inflow characteristics and high levels
of operational reliability during continuous operation, even under difficult operating
conditions.
• Backflow and pulsation problems can be reduced or fully compensated by installing a
suitable surge drum upstream.
• If the optimum measuring setup is not possible due to space restrictions (e.g., trial run), the
flowmeter sensor can also be installed using straightforward equipment (rubber sleeve).
Even then, the device will still be able to deliver good measurement results.
• The flowmeter sensor and all original accessories have been designed in such a way that
they can be very easily adapted using tapered flange couplings.
• Do not attach the flowmeter sensor directly to systems that are subject to high levels of
vibration. We recommend that you adapt them by using a rubber sleeve to isolate the
vibrations. The honeycomb must be protected from mechanical damage.
• To ensure fault-free signal processing, only the original probe cable should be used.
• The measuring system must undergo regular control calibrations on the manufacturer's test
bench. The intervals involved will depend on the operating time and the nature of the load;
however, we generally recommend calibration intervals of 12 ... 24 months.
