Operating Instructions
Integrated Transducer UVA-AS102
U326_UVAintAS102_B_e_070717
9/13
www.hoentzsch.com
The negative terminal of the analog output t (terminal 9) is on the same potential as the negative terminal
of the analog output v (terminal 5).
The analog output signal t is not used in the UVA (e.g. for conversion to standard values).
A4 Functional Description
UVA
transducers
are designed for connection of vortex probes VA40 and vortex measuring tubes VA Di for
measuring flow velocity or flow rate of air/gases.
The signal frequency generated from the flow sensor is converted to a linear
analog output signal 4-20
mA or 0-10 V
. The analog terminal value is parameterisable.
Current output
:
4 ... 20 mA
=
0 ... x m/s (or m³/h)
alternatively
:
Voltage output
:
0 ... 10 V
= 0 ... x m/s (or m³/h)
The actual velocity or actual flow rate can converted to standard velocity or standard volume flow by en-
tering the parameter 'temperature' and 'pressure' .
A
relay output
(normally open contact) can be parameterised for
1 of 2
functions
:
1. as
limit value
for the flow velocity or the flow rate:
flow velocity < or = limit value
: relay contact idle
flow velocity > limit value
: relay contact in working position
2. as
quantity pulse
for quantity measurement:
max. pulse repetition frequency 1 Hz per unit of volume, pulse duration 0.5 s,
e.g. 1 pulse per 1, 10 or 100 m³ or 1, 10 or 100 litre respectively
Self diagnosis according to NAMUR NE43:
No error
: yellow LED off
yellow LED on (flow velocity = 0)
or
green LED flashes (flow velocity > 0)
Error
: yellow LED on and with:
- analog output 4-20 mA : < 3.6 mA
- analog output 0-10 V : < -0.2 V
Monitoring power supply, data logging, sensor interface, parameter settings (see under A10: Trouble-
shooting)
PC serial port RS232
used to change calibration data and setting parameters.
Remove cover.
Plug PC connector cable (optional) with RJ22 into the socket in the UVA (see Fig. 1, A3.2.5)
Connect other end of cable to RS232 PC socket.
If a USB connection is required, then an optional USB / RS232 interface converter must be inserted.
Changes to the setting can now take place after starting the PC programme UCOM (optional)
(see under A5: Settings).
