Performance specifications
158 FEX300, FEX500 OI/FEX300/FEX500-EN
12 Performance specifications
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A
12.1 General
12.1.1 Reference conditions according to EN 29104
Fluid temperature 20 °C (68 °F) ± 2 K
Ambient temperature 20 °C (68 °F) ± 2 K
Supply power Nominal voltage acc. to name
plate U
n
± 1 %, frequency
f ± 1 %
Installation conditions
- Upstream >10 x DN,
straight section
- Downstream >5 x DN,
straight section
Warm-up phase 30 min.
12.1.2 Maximum measuring error
Impulse output
- Standard calibration FEP300 / FEH300:
± 0.4 % of measured value, ± 0.02 % Qmax
DN
- Standard calibration FEP500 / FEH500:
± 0.3 % of measured value, ± 0.02 % Qmax
DN
(DN 1 … 600, 800)
± 0.4 % of measured value, ± 0.02 % Qmax
DN
(DN 700 … 900,
2000)
- Optional calibration: (DN 10 … 600, 800)
± 0.2 % of measured value, ± 0.02 % Qmax
DN
Qmax
DN
: See table in Section 6.6, "Flowmeter sizes, flow range".
Fig. 69
Y Accuracy ± of measured value in [%]
X Flow velocity v in [m/s], Q / QmaxDN [%]
Analog output effects
Same as pulse output plus ± 0.1 % of measured value ± 0.01 mA
12.2 Reproducibility, response time
Reproducibility ≤ 0.11 % of measured value,
t
meas
= 100 s, v = 0.5 ... 10 m/s
Response time of
current output with
damping of
0.02 seconds
As step function 0 ... 99 %
5 200 ms at 25 Hz excitation
frequency
5 400 ms at 12.5 Hz excitation
frequency
5 500 ms at 6.25 Hz excitation
frequency
12.3 Transmitter
12.3.1 Electrical properties
AC 100 ... 230 V (-15 % / +10 %)
AC 24 V (-30 % / +10 %)
Supply power
DC 24 V (-30 % / +30 %), ripple: < 5
%
Line frequency 47 ... 64 Hz
Excitation frequency 6 1/4 Hz, 7 1/2 Hz, 12 1/2 Hz, 15 Hz,
25 Hz, 30 Hz (50 / 60 Hz power
supply)
Power consumption (flowmeter sensor including
transmitter)
AC S ≤ 20 VA
DC P ≤ 12 W (switch-on current
5.6 A)
Electrical connection Screw terminals
12.3.1.1 Isolation of input/outputs
The current output, digital outputs DO1 and DO2, and digital input are
electrically isolated from the flowmeter sensor input circuit and from
each other. The same is valid for the signal outputs of the versions
with PROFIBUS PA and FOUNDATION Fieldbus.
12.3.1.2 Empty pipe detection
The "empty pipe detection" function requires:
A conductivity of the measured fluid 20 µS/cm, a signal cable
length ≤ 50 m (164 ft), a nominal diameter DN ≥ DN 10, and the
flowmeter sensor must not be provided with a preamplifier.
12.3.2 Mechanical properties
Integral mount design
(transmitter mounted directly on the flowmeter sensor)
Housing Cast aluminum, painted
Paint Paint coat ≥ 80 µm thick, RAL 9002
(light gray)
cable gland used Polyamide, stainless steel (version for
ambient temperature -40 °C (40 °F))
Remote mount design
Housing Cast aluminum, painted
Paint Paint coat ≥ 80 µm thick, mid-section
RAL 7012 (dark gray), front cover/rear
cover RAL 9002 (light gray)
cable gland used Polyamide, stainless steel (version for
ambient temperature -40 °C (40 °F))
Weight 4.5 kg (9.92 lb)
12.3.2.1 Storage temperature, ambient temperature
Ambient temperature
-20 ... 60 °C (-4 ... 140 °F) standard
-40 ... 60 °C (-40 ... 140 °F) Advanced mode
Storage temperature
-40 ... 70 °C (-40 ... 158 °F)
12.3.2.2 Protection class for transmitter housing
IP 65, IP 67, NEMA 4X
12.3.2.3 Vibration according to EN 60068-2
Transmitter
• In the range 10 ... 58 Hz with max. 0.15 mm (0.006 inch) deflection*
• In the range 58 ... 150 Hz max. 2 g acceleration*
* = Peak load
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