Hontzsch UFA User manual

U328_UFAUVAextAS102_B_e_091103 www.hoentzsch.com 1/15
Operating Instructions
Transducers UFA and UVA in
AS102 housing
Transducers UFA / UVA
in AS102 housing
Operating Instructions
Vane wheel flow sensors FA Vortex flow sensors VA
Höntzsch GmbH
P.O. Box 1324 D-71303 Waiblingen
Gottlieb-Daimler-Straße 37
D-71334 Waiblingen (Hegnach)
Tel: [phone]
Fax: [phone]
E-Mail [e-mail]
Internet www.hoentzsch.com
zertifiziert nach
ISO 9001 : 2000
certified quality

2/15 www.hoentzsch.com U328_UFAUVAextAS102_B_e_091103
Operating Instructions
Transducers UFA and UVA in
AS102 housing
Contents
1Safety Symbols
2 Application according to Regulations
3 Operating Safety
4 Scope of Delivery
4.1 Description, Type Plates
5 Technical Specifications
5.1 Conformity with Standards
5.2 Storage Conditions
5.3 Operating Conditions
5.4 Compatibility
5.5 Housing and Connectors
5.6 Electrical Data
5.7 Measurement Uncertainty
6 Installation
6.1 Block Diagram
6.2 Wiring Diagrams
6.2.1 Shielding contact at cable bush
6.2.2 Power supply
6.2.3 Sensor input
6.2.4 Analog output
6.2.5 Relay
6.2.6 RS232 interface
6.2.7 optional LCD
6.3 Tips on Electromagnetic Compatibility (EMC)
6.4 Connecting Cable
7Functional Description
8 Settings
9 Performance Test
10 Initial Operation
11 Operation
12 Shut-down, Dismantling
13 Inspection
14 Maintenance
15 Calibration
16 Troubleshooting
17 Returns
18 Disposal
19 Replacement Parts
20 CE Declaration of Conformity, Manufacturer’s Declaration

U328_UFAUVAextAS102_B_e_091103 www.hoentzsch.com 3/15
Operating Instructions
Transducers UFA and UVA in
AS102 housing
1Safety Symbols
Warning!
Failure to observe the instructions can result in serious injury and damage to
property!
Important notice!
Non-observance can result in serious damage to the equipment or restriction in
performance!
2Application according to Regulations
Transducers UFA and UVA are instruments for measuring flow velocity and flow rate:
UFA for use with vane wheel flow sensors FA or FAR and measuring tubes FA Di or FAR Di and UVA for use
with vortex flow sensors VA40 and measuring tubes VA Di. These instruments are designed for industrial
application. The AS102 is an aluminium housing in protection class IP65.
The manufacturer is not liable for damage caused by improper use and/or non-compliance with the
regulations.
Do not carry out any structural modifications to the transducers.
Always follow the instructions on the type plate, especially the information regarding supply voltage.
3Operating Safety
All steps described below must be carried out by qualified personnel only!
Please read the Operating Instructions carefully before unpacking the equipment!
Safety can only be guaranteed if the equipment is operated in accordance with the regulations. Improper
handling can result in serious injury and damage to property.
4Scope of Delivery
-Transducer UFA or UVA in AS102 aluminium housing
- LCD display 2x16 digit in the cover (optional)
- Operating Instructions, Data Sheet
- CD-ROM with PC configuration software UCOM (optional)
- Interface cable RS232 for PC COM port connection (optional)
- USB adapter in addition to the interface cable RS232 (optional)

4/15 www.hoentzsch.com U328_UFAUVAextAS102_B_e_091103
Operating Instructions
Transducers UFA and UVA in
AS102 housing
Please check that everything listed in the Delivery Note / Technical Data Sheet is included in the delivery.
4.1 Description, Type Plates
One of the following type plates can be found on removing the cover:
Type plate UFA Type plate UVA
Type: UFA : transducer for vane wheel flow sensors
UVA : transducer for vortex sensors
S/N.: : serial number
Power: 230 VAC : supply voltage 230 V AC voltage
24 VDC : supply voltage 24 V DC voltage
12 VDC : supply voltage 12 V DC voltage
Input: FA/FAR : input for vane wheel sensors FA or FAR
VA : input for vortex sensors
Filter: ... : filtration of vane wheel input frequency
Output: 4-20 mA : analog output current 4-20 mA
0-10 V : analog output voltage 0-10V
RS232: ... : RJ22 plug
5Technical Specifications
5.1 Conformity with Standards
Transducers UFA / UVA are manufactured according to the best available technology, are safe and reliable
and comply with the relevant regulations, EU directives and standards.
IEC 529 and EN 60 529 : protection class IP65
EN 61 000-6-2 / IEC77 : EMC
5.2 Storage Conditions
Storage temperature: -30 to +70 °C
5.3 Operating Conditions
ambient air temperature in use: -25 to +50 °C
with optional LCD: 0 to +50 °C

U328_UFAUVAextAS102_B_e_091103 www.hoentzsch.com 5/15
Operating Instructions
Transducers UFA and UVA in
AS102 housing
protection class: IP65
mounting attitude: no restrictions, preferred with cable bush downward.
5.4 Compatibility
All Höntzsch vane wheel probes FA or FAR and all Höntzsch vane wheel measuring tubes FA Di or FAR Di
(without integrated transducer) can be connected to the UFA transducer.
The UFA replaces the U2a transducer with FA / FAR input.
All Höntzsch vortex probes VA and all Höntzsch vortex measuring tubes VA Di (without integrated
transducer) can be connected to the UVA transducer. The UVA replaces the U2a transducer with VA input.
5.5 Housing and Connectors
protection class : housing IP65
material : aluminium
external dimensions : L/W/H = 150/100/80 mm
cable bush : screwed cable glands in nickel-plated brass
for cable diameter 5 ... 10 mm
with shielding contacting
connections : 'push-in' circuit board terminals
for wires with cross-section 0.14 ... 1.5 mm².
No tools necessary for strand connection, simply insert the
strand ends (twisted or with end sleeve) into the terminal.
Separate strands by applying pressure to the terminal release
spring with a pen or screwdriver.
5.6 Electrical Data
Supply voltage, mains supply:
230V AC (215 ... 255 V AC), 50 ... 60 Hz, power < 10 VA
24 V DC (20 ... 27 V DC), power < 5 W
12 V DC (10 ... 17 V DC), power < 5 W
The mains supply is electrically isolated from the UFA/UVA inputs and outputs.
UFA input flow v/FA or v/FAR:
for Höntzsch vane wheel flow sensors FA and FAR designed as probes (ZS, TS ..., ZSR, TSR ...) and as
measuring tubes (FA Di, FAR Di ...).
When using sensors in Ex-zone category 2 an isolation/supply unit (e.g. LDX2) is an essential require-
ment.
UVA input flow v/VA:
for Höntzsch vortex flow sensors VA designed as probes (VA40 ...) and as measuring tubes (VA Di ...).
When using sensors in Ex-zone categories 1 and 2 an isolation/supply unit (e.g. LDX2) is an essential re-
quirement.
UFA analog output:
for FA and FAR*: 4 ... 20 mA = 0 ... x m/s (or m³/h),
for FAR : 4 ... 12 ... 20 mA = -x ... 0 ... +x m/s (or m³/h),
terminal values x configurable / burden max. 400 Ohm
alternative:
for FA and FAR*: 0 ... 10 V = 0 ... x m/s (or m³/h),
for FAR : 0 ... 5 ... 10 V = -x ... 0 ... +x m/s (or m³/h),
terminal values x configurable / impedance 1 kOhm
* for FAR sensors when configuring the relay: ±flow directions

6/15 www.hoentzsch.com U328_UFAUVAextAS102_B_e_091103
Operating Instructions
Transducers UFA and UVA in
AS102 housing
UVA analog output:
4 ... 20 mA = 0 ... x m/s (or m³/h),
terminal value x configurable / burden max. 400 Ohm,
alternative:
0 ... 10 V = 0 ... x m/s (or m³/h),
terminal value x configurable / impedance 1 kOhm
Relay: (potential-free change-over contact), max. 300 mA / 27 V DC
configurable as limit value v, quantity pulse or ±flow direction
(see under 7 - Functional Description)
RS232 interface:
for connection with UCOM (see under 7 Functional Description)
9600 Baud, 8Bit, no parity, 2 stop bits, Xon/Xoff
connection for optional LCD display:
flat ribbon cable with 10-pin connector
Do not plug in or out when live!
5.7 Measurement Uncertainty
Recording the measurement frequency (at 1000 Hz): <0.1%
Analog output (terminal value): <0.15%
Linearity error: <0.1%
Temperature coefficient: <20 ppm/K
(at 25 °K temperature difference equivalent to <0.05%)
6Installation
Authoritative here are the European installation regulations EN 60079-10: 1996 ff, as well as the general
engineering regulations and these Operating Instructions.
6.1 Block Diagram
UFA
UVA

U328_UFAUVAextAS102_B_e_091103 www.hoentzsch.com 7/15
Operating Instructions
Transducers UFA and UVA in
AS102 housing
6.2 Wiring Diagrams
Electrical connection must be carried out according to the appropriate wiring diagram. Faulty connection
can cause damage to persons and destruction of the electronics.
Do not install or wire up the transducer under mains voltage. Non-compliance can cause damage to
persons and destruction of the electronics.
In this connection and depending on the configuration of the equipment, one of the following wiring
diagrams must be taken into account.Wiring diagrams for measuring systems in customer-specific design
will be supplied separately.
6.2.1 Shielding contact at cable bush
6.2.2 Power supply
Before connecting please check that the power supply is within the specification. Remove the housing
cover of the UFA or UVA to reveal the type plate with all relevant information.
With a supply voltage of 230 VAC please ensure that the non-insulated areas of terminals and connecting
cables are not touched when live!
P=protective earth P=protective earth

8/15 www.hoentzsch.com U328_UFAUVAextAS102_B_e_091103
Operating Instructions
Transducers UFA and UVA in
AS102 housing
6.2.3 Sensor input
If the housing has a cable bush, shielding of the sensor connecting cable is contacted at cable bush.
6.2.4 Analog output
All relevant information can be found on the type plate.
The terminal value of the analog output can be configured with the PC software UCOM via the RS232
interface. The customer-specific programmed value can be found in the accompanying documents.
6.2.5 Relay output
The change-over contact of the relay is shown in
rest position (relay coil off).
The function of the relay output and the corre-
sponding setting parameter can be configured
with the PC software UCOM via the RS232 inter-
face. The customer-specific settings can be
found in the documentation.
FA / FAR Sensor
S=shielding
F1 = FA signal 1
G=FA ground
V+ = FA supply (*opt.)
F2 = FA signal 2 (**FAR only)
VA Sensor
S=shielding
F1 = VA signal
G=VA ground
V+ = VA supply
4-20 mA
Resistance max. 400 Ohm
S=shielding
0-10 V
Impedance 1 kOhm
S=shielding

U328_UFAUVAextAS102_B_e_091103 www.hoentzsch.com 9/15
Operating Instructions
Transducers UFA and UVA in
AS102 housing
6.2.6 RS232 Interface
The RS232 interface connection is below left next to the connecting terminals.
The RJ22 plug of the PC connecting cable is plugged in to the socket (see Fig. 1). PC connection follows at
aCOM port or using an optional USB adapter.
6.2.7 Optional LCD display in housing cover
The flat ribbon cable with 10-pin connector should not be plugged in or out when live! Risk to
persons and equipment!
Visible are the readout potentiometer for the LCD display contrast, the reset button for the quantity coun-
ter, the ST1 and ST2 jumpers (see under 7 – Functional Description).
Fig. 1:
PC connection with RJ22 plug with open cover
Fig. 2: LCD display connection with cover open

10/15 www.hoentzsch.com U328_UFAUVAextAS102_B_e_091103
Operating Instructions
Transducers UFA and UVA in
AS102 housing
6.3 Tips on Electromagnetic Compatibility (EMC)
•all connecting cables are to be kept as short as possible
•with cable routes longer than 30 m or with strong electromagnetic disturbance along the cable route
between sensor and evaluation unit, the use of a double-shielded cable is recommended: to do this
lay inner shielding to one side of the evaluation unit and lay outer shielding on both sides over a large
area with low-impedance connection on the sensor and evaluation unit or on the control cabinet
•do not loop or kink the cable!
•lay non-allocated cable strands on both sides on protective potential!
•lay cables as close to ground as possible,as for example side panels, mounting plates or steel gird-
ers
•when using frequency converters there is a risk of HF interference.Therefore, decouple the power
input of the frequency converter against active emitted interference using a radio interference filter.
This also increases the passive interference resistance of the facility
•between engines and converters use only shielded engine cables with double-sided shielding overlay
•spatially separate cables which emit interference from measuring lines and evaluation units. If
necessary, lay measuring lines in a metallic tubular cable protection
•metallic parts in control cabinets such as sub racks with control electronics or sub plates – to be
connected over a large area and HF-wise suitably conductive
•wire relays, switches and magnetic valves installed in the same circuit,using spark extin-
guisher combinations or over-voltage limiting components.
•apply analog signal cable shielding on one side only – preferably on the evaluation unit - and low re-
sistant. Twist unshielded cables against balanced induction
•apply digital signal cable shielding on both sides over a large area. In the case of potential differences
between these points it is advisable to lay a separate equipotential bonding conductor
•allow for preferred shielded connector for connections to points of separation of connection ca-
bles.Terminals should be situated in HF-tight housing, with suitable EMC cable bush. Contact outer
shielding of the connection cables to the cable bush.
6.4 Connection Cable
For connecting between sensor and evaluation unit LiYCY cable with simple copper braiding screen can be
used if the cable route is short and there is marginal electromagnetic interference. Over longer distances
or with a high rate of electromagnetic interference, a double-screened cable of type LiYCY-CY should be
used.
Sensor FA 2 (3) x 0.25 mm²
Sensor FAR 3 (4) x 0.25 mm²
Max. permissible conductor resistance per strand is 25 Ohm.
Max. permissible operating capacity between 2 strands is 1.5 nF.
Sensor VA 3 x 0.25 mm2
Max. permissible conductor resistance per strand is 15 Ohm.
Conductor resistances for finely stranded conductors:
approx. 79 Ohm/km with wire cross section 0.25 mm2
approx. 39 Ohm/km with wire cross section 0.50 mm2
approx. 26 Ohm/km with wire cross section 0.75 mm2

U328_UFAUVAextAS102_B_e_091103 www.hoentzsch.com 11/15
Operating Instructions
Transducers UFA and UVA in
AS102 housing
7Functional Description
UFA transducers are designed for connecting to vane wheel probes FA and FAR (directional sensing) and
vane wheel measuring tubes FA Di and FAR Di (directional sensing) for measuring flow velocity or flow ra-
te of air/gases and water/liquids.
UVA transducers are designed for connecting to vortex probes VA and vortex measuring tubes VA Di for
measuring the flow velocity or flow rate of air/gases.
The signal frequency proportional to the velocity 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 configurable. When logging direc-
tional sensing data the zero point can be selected in the middle of the analog range or directional sensing
takes place with the help of the relay output:
for FA and FAR*: 4... 20 mA = 0 ... x m/s (or m³/h)
for FAR: 4... 12 ... 20 mA = -x ... 0...+x m/s (or m³/h)
for VA: 4... 20 mA = 0 ... x m/s (or m³/h)
alternatively:
for FA and FAR*: 0... 10 V = 0 ... x m/s (or m³/h)
for FAR: 0... 5 ... 10 V = -x ... 0...+x m/s (or m³/h)
for VA: 0... 10 V = 0 ... x m/s (or m³/h)
*for FAR sensors for configuring the relay see under: ±direction of flow
The actual velocity or actual flow rate can be converted to standard velocity or standard flow rate by en-
tering the parameter for temperature and pressure.
Arelay output (normally open contact) can be configured for 1of 3 different 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,
configurable, e.g. 1 pulse per 1, 10 or 100 (norm)-m³ or (norm)-litre
pulse duration 0.5 s (FAR sensors: configurable for '+' or '-' amounts)
3. as ±direction of flow ** (for FAR sensors only):
+direction: relay contact in idle
- direction: relay contact in in working position
** analog output (see above) is then absolute value of flow only, without direction
Self diagnosis according to NAMUR NE43:
No error: yellow LED off
green 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
Monitored: power supply, data logging, sensor interface, parameter settings (see under 16 - Trouble-
shooting)
PC serial port RS232:
for changing calibration data and setting parameters.
Remove cover.
Plug PC connector cable (optional) with RJ22 into the socket in the transducer (see Fig. 1).
Connect other end of cable to PC COM port.
If a USB connection is required, then an optional USB / RS232 interface converter must be inserted.
Changes to the settings can now take place after starting the PC programme UCOM (optional) (see under
8 - Settings).
optional LCD display in housing cover:
2 x 16 digit, character height 5.5 mm.
Display line 1: instantaneous value velocity or flow rate.
Display line 2: 'quantity counter' or 'error code'.

12/15 www.hoentzsch.com U328_UFAUVAextAS102_B_e_091103
Operating Instructions
Transducers UFA and UVA in
AS102 housing
Configuration (see Fig. 1) via 2 jumper wrap connectors ST1 and ST2
Display line 1:
ST1 = m/s and ST2 = any: velocity in (N)m/s *
ST1 = m³/h (lt/h) and ST2 = A: flow rate in (N)m³/h
ST1 = m³/h (lt/h) and ST2 = B: flow rate in (N)lt/h **
* standard values (N) only when parameter 'switching v/NV' =1 (see under 8 - Settings)
** only when diameter Di < 75.0 mm, otherwise display in (N)m³/h
Display line 2:
Quantity counter in m³ with 0 ... 3 decimal places
In the case of FAR vane wheel sensors the display switches every 4 seconds between +quantity and
-quantity.
(see under 8: parameter 'switching pulse m³(cbm) / l (litre)' and
parameter 'm³ (cbm) / l (litre) per pulse' and
parameter 'decimal places quantity display')
with error: error 01 = parameter error
error 02 = sensor error
(see under 16: Troubleshooting)
Reset button: (see Fig. 1)
Reset the quantity counter by pressing the reset button for more than 3 seconds
8Settings
The following setting parameters can be read using the PC software UCOM and are also alterable.
The customer-specific settings are shown on the parameter print-out, which is included in the
documents.
Please find operation instructions PC software UCOM in document U385.
9Performance Test
sensor not connected
(pay attention to 6.2.2 Power supply and 6.2.4 analog output)
after connecting the supply voltage the green and yellow LED light up.
The analog output sends a value between 3.4 mA and 3.6 mA with output current or between –0.3 V and
–0.2 V with output voltage.
10 Initial Operation
sensor connected
(pay attention to 6.2.2 Power supply, 6.2.3 Sensor input and 6.2.4 analog output)
After connecting the supply voltage the green LED lights up and the yellow LED is off.
No flow at sensor: the green LED is permanently on, the analog output sends a value of 4 mA with output
current (or 12 mA depending on configuration with FAR sensors) or with output voltage a value of 0 V (or
5 V depending on configuration with FAR sensors, see under 7 Functional Description)
Flow at sensor: the green LED flashes, the analog output sends an analog value deviating from the zero
flow conditions (see above).

U328_UFAUVAextAS102_B_e_091103 www.hoentzsch.com 13/15
Operating Instructions
Transducers UFA and UVA in
AS102 housing
11 Operation
(pay attention to 5.3 Operating Conditions and 5.6 Electrical Data)
12 Shut-down, dismantling
Before disconnecting the cable, please ensure that the supply voltage is switched off.
13 Inspection
Checking the LEDs, (see under 7 Functional Description, Self diagnosis)
14 Maintenance
Only use cleaning agents which dry without leaving any residue and which are compatible with the housing
materials.
15 Calibration
The UFA and UVA transducers have an excellent long-term stability. However, it makes sense to have the
instruments calibrated at certain intervals. The period between two calibrations depends on the individual
operational conditions and the tolerable measurement error. Therefore, as a precaution, shorter calibra-
tion cycles should be chosen at the beginning. As an indication and under 'normal' operating conditions
acalibration cycle of approx. 3-5 years applies.
Transducers must be returned to the manufacturer for calibration. Please refer to Section 17!

14/15 www.hoentzsch.com U328_UFAUVAextAS102_B_e_091103
Operating Instructions
Transducers UFA and UVA in
AS102 housing
16 Troubleshooting
Fault Cause Troubleshooting
no power supply check connecting cable, measure voltage
at connecting terminals
green LED does not
light up
transducer electronics faulty return to factory
cable break or short-circuit check terminals,
check cable for continuity and replace if
necessary
yellow LED lights up,
green LED does not
flash despite flow,
analog output = error
(<3.6 mA or < -0.2V)
transducer electronics or sensor
faulty
return to factory
parameter error check parameter with UCOM software,
save new checksum
(or return to factory)
yellow LED lights up,
green LED flashes with
flow, analog output =
error (<3.6 mA or < -
0.2V)
transducer electronics faulty return to factory
sensor contaminated clean sensor according to instructionsno measured value
coefficient set at 0.000 set coefficient at '1.000'
sensor contaminated clean sensor according to instructions
coefficient setting too low set coefficient at '1.000'
input/output section too short change sensor position, improve flow
conditions with a flow rectifier
rotational flow reposition sensor in flow direction, install
flow rectifier
vortex VA sensors:
reduced acoustic coupling in the
sensor elements as a result of
intense vibration or powerful
impact
return sensor to factory for performance
test
burden at current output is grea-
ter than specified in the Technical
Data Sheet resulting in correct
output values in the lower range
and no longer increasing values
at the top end of the measuring
range
reduce resistance
measured value too
low
incorrect scaling of analog output check setting and amend if necessary
coefficient set too high set coefficient at '1.000'measured value too
high EMC problem see under 6.3
17 Returns
No special measures necessary for UFA and UVA transducers.
When returning sensors, these should be cleaned thoroughly according to the instructions. A hazard warn-
ing or declaration of no objection must be supplied for substances which have been in contact with the
sensor or possibly infiltrated the cavities in the sensor. If adhesion of hazardous substances cannot be
ruled out, then detailed safety measures to be taken when handling the equipment must be itemised.
18 Disposal
The customer should assume the duty to dispose of the equipment at his own expense and according to
statutory provisions (e.g. ElektroG in Germany).

U328_UFAUVAextAS102_B_e_091103 www.hoentzsch.com 15/15
Operating Instructions
Transducers UFA and UVA in
AS102 housing
19 Replacement Parts
11
2
20 CE Declaration of Conformity, Manufacturer’s Declaration
We herewith declare, that all appliances and sensors manufactured by us comply with the regulations of
the EMC Directive 89/336/EEC, the Pressure Equipment Directive 97/23/EC and the Safety of Machinery
Directive 89/37/EC.
The structural components comply with the following generic standards/directives:
•Low Voltage Directive (73/23/EEC)
•Safety of Machinery – Electrical Equipment of Machines (IEC 60204)
•Safety Requirements for Electrical Equipment for Measurement, Control and
Laboratory Use (IEC 61010)
•Electrical Systems and Devices (VBG 4)
•Generic Standards, Immunity for Industrial Environments (IEC 61000-6-2)
•Generic Emission Standard, Industrial Environment (IEC 61000-6-4)
Itte / Steinhauser
HÖNTZSCH GmbH
Fuse TR5 (2) is situated in the base behind the power
supply connecting terminals and is easily accessible
by loosening the screws (1) to remove the cover
plate:
for 230 V AC TR5-T 100 mA order no. e025/023
for 24 V DC TR5-T 500 mA order no. e025/024
for 12 V DC TR5-T 500 mA order no. e025/024
Always switch off before changing the fuse!
Fig. 3:
Fuse
TR5