Hontzsch UVA-AS102 User manual

Operating Instructions
Integrated Transducer UVA-AS102
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Annex
Operating Instructions
Transducer UVA
integrated in the connection housing AS102 of the
vortex probes VA40, VAT40 and
vortex measuring tubes VA Di
Contents
zertifiziert nach
ISO 9001 : 2000
certified quality
A1 Scope of Delivery
A1.1 Description, Type Plates
A2 Technical Specifications
A2.1 Operating Conditions
A2.2 Housing and Connectors
A2.3 Electrical Data
A2.4 Measurement Uncertainty
A3 Installation
A3.1 Block Diagram
A3.2 Wiring Diagrams
A3.2.1 Shielding contact at cable bush
A3.2.2 Power supply
A3.2.3 Analog output v (Flow)
A3.2.4 Relay
A3.2.5 Interface RS232
A3.2.6 Optional LCD display
A3.2.7 Optional analog output t (Temp)
A4 Functional Description
A5 Settings
A6 Initial Operation
A7 Operation
A8 Shut-down, Dismantling
A9 Inspection
A10 Troubleshooting
A11 Replacement Parts

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A1 Scope of Delivery
-Transducer UVA integrated in the connection housing of the vortex sensor VA
-Operating Instructions U326;
data sheet vortex flow sensor with integrated transducer UVA
-CD-ROM with PC configuration software UCOM (optional)
-Interface cable RS232 for PC connection COM interface (optional)
-USB adapter in addition to interface cable RS232 (optional)
Please check that everything listed in the Delivery Note / Technical Data Sheet is included in the delivery.
A1.1 Description, Type Plates
Remove cover to reveal type plate:
VA-Di Flow Sensor : measuring tube VA Di
VAT-Di Flow Sensor : measuring tube VA Di with temperature measurement
VA40 Flow Sensor : probe VA40
VAT40 Flow Sensor : probe VA40 with integrated temperature measurement
S/N : serial no.
Di : inside diamter Di of measuring tube
(VA Di and VAT Di only)
PS : max. permissible pressure (absolute)
FLOW TRANSDUCER : integrated transducer
Type : UVA (transducer for vortex sensors VA)
Power : supply voltage 24 VDC = 24 V direct voltage
12 VDC = 12 V direct voltage
Output : 4-20 mA = current output 4-20 mA
0-10 V = voltage output 0-10V
RS232 : RJ22 plug

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A2 Technichal Specifications
A2.1 Operating Conditions
ambient air temperature
of connection housing
in use : -25 ... +50 °C
with optional LCD display : 0 ... +50 °C
protection class : IP65
mounting attitude : no restrictions
A2.2 Housing and Connectors
protection : housing IP65
material : aluminium
external dimensions : L/W/H = 150/100/80 mm
bush : metallic screwed cable glands
for cable diameter 5 ... 10 mm
with contacting of the shielding
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.
A2.3 Electrical Data
Supply voltage, mains supply:
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 UVA outputs.
UVA analog output v : 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 (bzw. m³/h),
terminal value x configurable / impedance 1 kOhm
Relay : (potential-free normally open contact), max. 300 mA / 27 V DC,
configurable as limit value v
or quantity pulse (see Functional Description)
RS232 interface : for connection with PC programme UCOM
(see Functional Description)
9600 Baud, 8Bit, no parity, 2 stop bits, Xon/Xoff

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Connection : flat ribbon cable with 10-pin connector
for optional LCD display Do not plug in or out when live!
Risk to persons and equipment!
optional analog output t : 4 ... 20 mA = x ... y °C
burden max. 200 Ohm
x °C fixed preset initial value for measuring temperature
y °C fixed preset terminal value for measuring temperature
(see accompanying documentation)
A2.4 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%)

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A3 Installation
Authoratative for installation are the valid national regulations for installing electrical equipment, the gen-
eral engineering regulations and these Operating Instructions.
A3.1 Block Diagram
(Terminals 10 ... 14 are not populated and only accessible internally)
A3.2 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 dia-
grams must be taken into account. Wiring diagrams for measuring systems in customer-specific design
will be supplied separately.
A3.2.1 Shielding contact at cable bush
UVA integrated

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A3.2.2 Power supply
Before connecting please check that the power supply is within the specification. Remove the cover of the
integrated UVA to reveal the type plate with the relevant information.
A3.2.3 Analog output v
Remove the cover of the integrated UVA to reveal the type plate with the relevant information regarding
analog output.
The terminal value of the analog output can be parameterised with the PC software UCOM via the RS232
interface. The customer-specific programmed value can be found in the accompanying documents.
P=protective earth
4-20 mA
Resistance max. 400 Ohm
0-10 V
Impedance 1 kOhm

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A3.2.4 Relay output
The normally open contact of the relay is shown in rest position (relay coil off).
The function of the relay output and the corresponding setting parameter are parameterable with the PC
software UCOM via the RS232 interface. The customer-specific settings are in the parameter printout.
A3.2.5 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.
Fig. 1:
PC connection with RJ22 plug with open cover

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A3.2.6 LCD display in housing cover (optional)
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 contrast of the LCD display, the reset button for the quantity
counter, the ST1 and ST2 jumpers (see Functional Description A4).
A3.2.7 Analog output t (temp) (optional)
The initial value x °C (4 mA) and the terminal value y °C (20 mA) are permanent hardware settings and
recorded in the Technical Data Sheet.
4-20 mA
Resistance max. 200 Ohm
Abb. 2: LCD display connection with cover open

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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' .
Arelay output (normally open contact) can be parameterised for 1of 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).

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Optional LCD display in 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'.
Configuration (see Fig. 2, A3.2.6) 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 A5)
** 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
(see under A5: 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 A10: Troubleshooting)
Reset button in cover: see Fig. 2: A3.2.6
Reset the quantity counter by pressing the reset button for more than 3 seconds.
A5 Settings
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.
A6 Initial Operation
(A3.2.2 Pay attention to power supply)
(A3.2.3 Pay attention to analog output)
After connecting the supply voltage the green LED lights up, the yellow LED is switched off.
No flow at sensor: the green LED is permanently on, the analog output supplies a value of 4 mA at flow
output or at voltage output a value of 0 V.
Flow at sensor: the green LED flashes, the analog output supplies an analog value other than the given
values of the zero flow conditions (see above).

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A7 Operation
(Pay attention to A2.1 Operating Conditions)
(Pay attention to A2.3 Electrical Data)
A8 Shut-down, Dismantling
Before disconnecting the cable please ensure that the supply voltage is switched off.
A9 Inspection
Checking the LEDs, (see under A4 Functional Description, Self diagnosis)

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A10 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 = er-
ror (<3.6 mA or
<-0.2V)
transducer or sensor electro-
nics 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 instructions no 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 con-
ditions with a flow rectifier
rotational flow reposition sensor in flow direction; install flow
rectifier
reduced acoustic coupling in
the sensor elements as a
result of intense vibration or
apowerful impact
return sensor to factory for performance test
burden at current output is
greater than specified in the
Technical Data Sheet. This
results in correct output val-
ues in the lower range and
no longer increasing output
values at the top end of the
measuring range
reduce burden resistance
measured value too
low
incorrect scaling of analog
output
check setting and amend if necessary
coefficient set too high set coefficient at 1.000measured value too
high EMC problem see reference to electromagnetic compatibility
(EMC)

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A11 Replacement Parts
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Fig. 3: Fuse TR5
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!