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2.
PRODUCT DESCRIPTION
The flow meter of the series EE771, based on the measurement principle of thermal mass flow, is suited for
the measurement of flow of air and gases in pipelines. Measurement of for instance the consumption of com-
pressed air, nitrogen, helium, argon, CO
The EE771 measures the volume flow at standard conditions according to DIN 1343 (P
t
= 273.15 K or 0 °C (32 °F). In addition to the standard volume flow, the measurand mass flow, norm flow
0
and temperature are available.
The EE771 has an integrated consumption counter. The consumption quantity is indicated in the display and
is not lost after a power failure. Two signal outputs are available. Depending on the application, the outputs
can be configured as analogue (current or voltage), switch output or as pulse output for the measurement of
the consumption.
1
Signal conditioning with optional display
The enclosure with the signal conditioning is mounted either on the
measurement probe (model A or B compact) or is remote with a
plugable sensor cable up to 10 meter (33 feet) (model C with remote
probe).
2
Sensing probe with measurement electronics
The interchangeable sensing probe contains the sensor element and
the measurement electronics, in which the data of the factory
calibration is stored. The sensing probe is easy and quickly inter-
changeable in the field, independent of the electronics for the signal
conditioning. After the exchange, the configuration of the outputs is
unchanged.
3
Sensor cable (only by model C with remote sensing probe)
The sensor cable allows for the remote installation, up to 10 meter
(33 feet), of the sensing probe from the housing with the signal condi-
tioning.
4
Measurment valve with shut-off function
The measurement ball valve assembly allows for the easy and reliable
installation within the pipeline. During installation in the pipeline,
observe the required inlet and outlet paths (see page 10). The
nominal size of the measurement ball valve assembly must match the
nominal size of the pipe.
The measurment valve with shut-off function allows for the instalment
and removal of the sensing probe with only interrupting the process
flow for a short moment. The measurement ball valve assembly is
suitable for pressures up to 16 bar (PN16) and available for pipe diam-
eters DN15 (1/2") to DN50 (2").
5
Screw cap
The screw cap, with female thread, is screwed in place if the flow
meter is not installed and the pipeline has to be used.
or other non-corrosive and non-flammable gases.
2
6
= 1023.25 mbar;
0
1
2
3
4
5
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