E+E Elektronik EE650 User Manual

USER'S GUIDE
EE650 - Air Velocity Transmitter for HVAC Applications
GENERAL
The EE650 transmitter is designed for accurate measurement of air velocity in HVAC. It operates on the hot-film anemometer
principle and features the innovative, very robust E+E VTQ sensing element manufactured in thin-film technology combined with
state-of-the-art transfer molding.
The construction of the sensing head leads to a very low angular dependence which facilitate the installation. The mounting flange
allows for easy adjustment of the immersion depth.
The measuring range and the response time of EE650 can be selected with jumpers on the electronics board, see below
"Settings".
EE650 is dedicated for heating, ventilation and air conditioning applications. For special applications do not hesitate to contact the
manufacturer or their local distributor.
CAUTION
• Accurate measurement results are conditioned by the correct positioning of the sensing probe in the air stream. Best accuracy
is achieved in laminar flow.
• Observe the minimum inlet and outlet path length, see page 4.
• Avoid mechanical stress onto the probe and mainly onto the sensing head.
• Observe the humidity working range 5...95% RH, non-condensing.
• Avoid installation in corrosive environment, as this may lead to sensor destruction.
CONNECTING DIAGRAM
Analogue output
Power supply
24 V AC/DC ±20%
1 ... V+ = supply voltage
2 ... GND = ground
3 ... AV = analogue output air velocity
RS485 Interface
Power supply
24 V AC/DC ±20 %
V+
GND
AV
V / mA
~
1
V+
2
GND
A (=D+) 3
RS485
B (=D-) 4
Remote sensor probe
b ... brown
g ... green
y ... yellow
w ... white
s ... black
S1 S2
ON
S1: Response time t
90
ON: slow
OFF: fast
S2: Termination resistor
120 Ohm
ON/OFF