Datasheet

DN25 DN20 DN15
175
EE741
v1.0 / Modification rights reserved
Modular design
With the DN15, DN20 and DN25 gauge mounting blocks, one and the
same transmitter unit can be installed on all three pipe diameters. The
pipe diameter can easily be changed via display menu or with the EE-PCS
product configuration software.
Once the gauge mounting block is built into the pipeline, the transmitter
can be installed and removed without disassembling the pipework. As a
result, the EE741 is also ideal for temporary measurements or even mobile
use. The sealing plug included in the scope of supply enable the normal
operation of the compressed air system when the transmitter is removed.
Technical data
Measured values
Flow
Measurands m
3
/h, m
3
/min, l/min, l/s, kg/h, kg/min, m/s, SCFM, ft/min, °C, °F
Standard conditions (factory setting) 1013.25 mbar
(14.7 psi), 0 °C (32 °F) (configurable)
Measuring range
1)
in air DN15: 0.2...76.3 Nm
3
/h (0.12...44.88 SCFM)
DN20: 0.4...135.6 Nm
3
/h (0.24...79.77 SCFM)
DN25: 0.6...212 Nm
3
/h (0.36...124.71 SCFM)
Accuracy
2)
in air at 7 bar (102 psi) (abs) and 23 °C (73 °F) ± (3 % of measured value + 0.3 % of full scale)
Temperature coefficient ± 0.25 % of the measured value / °C deviating from 23°C
(73°F)
Pressure coefficient
3)
+ 0.5 % of the measured value / bar deviating from 7 bar (102 psi)
Response time t90 < 2 sec.
Measuring rate 0.1 sec.
Temperature
Measuring range -20...60 °C (-4...140 °F)
Accuracy at 20 °C (68 °F) and flow >0.5 Nm/s ± 0.7 °C (1.26 °F)
Outputs
Analogue output (scalable) 0 - 20 mA / 4 - 20 mA R
L
<500 Ohm
Switch output DC PNP, max. 100 mA, V
drop
<2.5 V
Configurable: N/C or N/O, hysteresis, window
Pulse output Consumption meter, pulse length 0.02...2 sec.
Bus-interface Modbus RTU or M-BUS (Meter-Bus)
Configuration interface USB
General
Supply voltage 18 - 30 V DC
Current consumption (max.) 150 mA (with display)
100 mA (without display)
Operating pressure (max.) 16 bar / PN16
Ambient temperature with display -10...50 °C
(14...122 °F)
without display -20...60 °C (-4...140 °F)
Medium and storage temperature -20...60 °C (-4...140 °F)
Humidity 0…100 % RH, non-condensing
Medium Compressed air, nitrogen, oxygen, helium, CO
2
, argon
Electrical connection M12x1 4 pol. plug
Electromagnetic compatibility EN61326-1 EN61326-2-3
Industrial environment
Material Enclosure Polycarbonate
Probe tube Stainless steel 1.4404
Probe head / sensor Stainless steel 1.4404 / glass
Gauge mounting block Aluminium anodized or stainless steel 1.4404
Enclosure protection class IP65
1) Factory setting of the output see manual.
2) The tolerance specifications include the uncertainty of the factory calibration with a coverage factor k=2 (2 x standard deviation). The tolerance was calculated in accordance
with EA-4/02 following the GUM (Guide to the Expression of Uncertainty in Measurement).
3) The flow meter is factory adjusted at 7 bar (abs). At operating pressure other than 7 bar (abs), the error can be corrected by entering the actual system pressure via display
menu or with EE-PCS configuration software.