Instruction Manual
for
Ultrasonic Level Meter
Model: NUS-4...
NUS-4
Seite 2 NUS-4 K05/0216
1. Contents
1. Contents ........................................................................................................ 2
2. Note .............................................................................................................. 4
3. Instrument Inspection .................................................................................... 4
4. Regulation Use .............................................................................................. 4
5. Operating Principle ........................................................................................ 5
6. Mechanical connection .................................................................................. 5
6.1 Block distance ...................................................................................... 5
6.2 Installation (Liquid Level Measurement) .............................................. 6
6.3 Installation (Open Channel Flow Measurement) .................................. 7
6.4 Mechanical connection ........................................................................ 8
7. Electrical Connection .................................................................................... 8
8. Programming ................................................................................................ 9
8.1 BASIC CONCEPTS AND ELEMENTS OF THE ULTRASONIC
MEASUREMENT ................................................................................. 9
8.2 Programming without Display Module .................................................. 9
8.3 Programming with the Display Module NUS-400P ............................ 11
8.3.1 Display Module NUS-400P ........................................................ 12
8.3.2 Programming steps with the Display Module NUS-400P ........... 13
8.3.3 GET LEVEL Function ................................................................ 14
8.3.4 INDICATIONS OF THE NUS-400P AND LED STATUS ............ 14
8.3.5 QUICKSET ................................................................................ 15
8.3.6 Full Parameter Access ............................................................... 17
9. Parameters – Description and Programming .............................................. 18
9.1 Measurement Configuration ............................................................... 18
9.2 Current Output ................................................................................... 21
9.3 Relay Output ...................................................................................... 22
9.4 Measurement Optimisation ................................................................ 23
9.5 Volume Measurement ........................................................................ 26
9.6 Volume Flow Measuring .................................................................... 27
9.7 32- Point Linearisation ....................................................................... 31
9.8 Informational Parameters (Read Out Parameters) ............................ 32
9.9 Additional Parameters of Flow Metering in Open Channels ............... 33
9.10 Test Parameters ................................................................................ 33
9.11 Simulation .......................................................................................... 33
9.12 Access Lock ....................................................................................... 34
10.Error Codes ................................................................................................. 34
11.Parameter Table ......................................................................................... 35
12.Sound Velocities in Different Gases ............................................................ 36
13.Technical Data ............................................................................................ 37
14.Order Codes ............................................................................................... 38
15.Dimensions ................................................................................................. 39
16.EU Declaration of Conformance .................................................................. 40
NUS-4
NUS-4 K05/0216 Seite 3
Manufactured and marketed by:
Kobold Messring GmbH
Nordring 22-24
D-65719 Hofheim
Tel.: 06192-2990
Fax: 06192-23398
Internet: http: //www.kobold.com
e-mail: info.de@kobold.com
NUS-4
Seite 4 NUS-4 K05/0216
2. Note
Please read these operating instructions before unpacking and putting the unit into
operation. Follow the instructions precisely as described herein. The devices are
only to be used, maintained and serviced by persons familiar with these operating
instructions and in accordance with local regulations applying to Health & Safety
and prevention of accidents.
When used in machines, the NUS should be used only when the machines fulfil the
EC-machine guidelines.
3. Instrument Inspection
Instruments are inspected before shipping and sent out in perfect condition. Should
damage to a device be visible, we recommend a thorough inspection of the
delivery packaging. In case of damage, please inform your parcel service /
forwarding agent immediately, since they are responsible for damages during
transit.
Scope of delivery:
The standard delivery includes:
Ultrasonic level meter model: NUS-4
Instruction Manual
4. Regulation Use
Model NUS-4 is a compact user friendly ultrasonic level meter comprising of an
ultrasonic sensor and an integrated evaluating electronics. It was specifically
developed for level and volume measurement in open and closed vessels or for
flow measurement in open channels.
Level measurement technology based on the non-contacting ultrasonic principle is
especially suited for applications where, for any reason, no physical contact can be
established to the surface of the material to be measured.
Such reasons may include corrosive attack by the process medium against the
measuring device material (acids), possible contamination (sewage) or particles of
the process medium adhering to the measuring device (adhesive materials).
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5. Operating Principle
The sensor emits an ultrasonic pulse train and receives the echoes reflected. The
intelligent electronic device processes the received signal by selecting the echo
reflected by the surface and calculates from the time of flight the distance between
the sensor and the surface. A Norm signal output is available for remote transfer
whereas a relay contact is available for monitoring purpose.
A narrow beam angle ensures a reliable measurement in narrow silos with uneven
side walls as well as in process tanks with various protruding objects. Furthermore,
as a result of the narrow beam angle - the emitted ultrasonic signals have an
outstanding focusing - deep penetration through gases, vapour and foam is
ensured.
6. Mechanical connection
6.1 Block distance
Due to signal characteristics of the sensor, there is an area directly below the
sensor, where no pulses can be received (Dead Zone).
The so called Block distance (minimum measuring distance) is very important for
error free functioning of the level meter. It determines the minimal distance
between the sensor and maximum level. This distance can be extended by
programming in order to avoid disturbing effects of possible disturbing echoes
coming from fixed objects (Close-end Blocking).
Mount the sensor high enough that even with maximum filling of the container,
the block distance is not violated. Violation of the block distance may lead to
device-malfunction.
Model Block distance
NUS-4x04
0,20 m
NUS-4x06
0,25 m
NUS-4x08
0,35 m
NUS-4x10
0,35 m
NUS-4x15
0,45 m
NUS-4x25
0,60 m
NUS-4
Seite 6 NUS-4 K05/0216
6.2 Installation (Liquid Level Measurement)
Never mount two ultrasonic level-measuring devices in one container,
because the two devices can interfere with each other's functioning.
POSITION
The optimal position of the NUS-4 is on
the radius
r = (0.3 … 0.5) R of the (cylindrical) tank
/ silo.
(Take also sonic cone on page 39 into
consideration.)
SENSOR
ALIGNMENT
The sensor face has
to be parallel to the
surface of the liquid
within 2-3.
TEMPERATURE
Make sure that the
transmitter will be
protected against
overheating by direct
sunshine.
Sunshade
OBSTACLES
Make sure that no inflow path or objects
(e.g. cooling pipes,
ladders, bracing
members,
thermometers, etc.) or
no tank wall of the
ragged surface
protrude into the
sensing cone of the
ultrasonic beam.
One fix object in the
tank / silo that disturb
the measurement can
be blocked out by the
optional programming
unit.
FOAM
Foaming of the liquid surface may render ultrasonic level
metering impossible. If possible, a location should be found,
where foaming is the least (device should be located as far
as possible from liquid inflow) or a stilling pipe or well should
be used.
WIND
An intensive air (gas) movement in the vicinity of the
ultrasonic cone is to be avoided. A strong draft of wind may
"blow away" the ultrasound.
Devices with lower measuring frequency (40, 20 kHz) are
recommended.
FUMES / VAPOURS
For closed tanks containing chemicals or other liquids, which
creates fume/gases above the liquid surface especially for
outdoor tanks exposed to the sun, a strong reduction of the
nominal measuring range of the ultrasonic device is to be
considered during device selection.
Devices with lower measuring frequency (40, 20 kHz) are
recommended in these cases units.
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NUS-4 K05/0216 Seite 7
STAND-OFF PIPE
The structure of the stand off pipe should be rigid; the inner rim where the ultrasonic beam leaves the
pipe should be rounded.
L
Ø D
r
L
D
min
r
Ø D
L
L
D
min
NUS-
4x04
NUS-
4x06
NUS4x08
NUS-
4x10
NUS-
4x15
NUS4x25*
150 50 60 60 90 80 130 200 50 60 75 200 80 140 250 65 65 90 350 85 150 300 80 75 105 500 90 160 350 95 85 120
L
Ø D
L
D
min
NUS-4x10 NUS-4x15
90 80 130
200 80 140
350 85 150
500 90 160
*NUS-4x25
mut not be mounted on a pipe socket, since the sensor surface should protrude into the vessel
6.3 Installation (Open Channel Flow Measurement)
For ultimate accuracy, install the sensor as close as possible above the
expected maximum water level (see minimum measuring range).
Install the device in a place defined by the characteristics of the metering
channel along the longitudinal axis of the flume or weir.
In some cases foam may develop on the surface. Make sure that the surface,
opposite to the sensor remains free of foam for proper sound reflection.
From the point of view of measurement accuracy the length of the channel
sections preceding and following the measuring flume and their method of
joining to the measuring channel section are of critical importance.
Despite of the most careful installation, the accuracy of flow metering will be
lower than that of specified for the distance measurement. It will be determined
by the features of the flume or weir applied.
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Seite 8 NUS-4 K05/0216
6.4 Mechanical connection
Screw the unit in to its place. Use open wrench for
tightening; max torque is 20Nm
After tightening the enclosure can be rotated to the proper
position. (Safety bolt prevents rotation more than 350°)
7. Electrical Connection
Ensure that the power supply is turned off at the source.
The unit may be damaged by electrostatic discharge (EDS) via its terminal, thus
apply the precautions commonly used to avoid electrostatic discharge e.g. by
touching a properly grounded point before removing the cover of the enclosure.
With removal of the cover of the housing and taking out the display module (if
any), the screw terminals can be accessed. Suggested cable core cross section:
0.5 ... 1.5 mm2. Arrange grounding by the inner or outer grounding screw first.
Switch on the unit and make necessary programming.
The actual loop current can be measured with an accuracy of 0.5% by
connecting an voltmeter (in the range of 200 mV) to the points indicated on the
drawing
After programming ensure proper sealing and closing of the cover.
2
1
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8. Programming
8.1 BASIC CONCEPTS AND ELEMENTS OF THE ULTRASONIC
MEASUREMENT
Programmed
measurement
range of the
application
P06
Far end blocking
DIST= distance (measured)
Close end blocking (programmed value
LEV= level calculated; H - DIST)
VOL= volume (calculated from DIST LEV)
Max measuring distance of the application (H)
Max measuring distance of the device
DEFAULT value of P04
X
M
Max measurement range of the device
Min measuring distance
(dead band)
DEFAULT value of P05
programmed value of P04
X
m
8.2 Programming without Display Module
Programming is only possible if the Transmitter is in Level Measuring Mode and
receives valid echo i.e. “VALID” LED is lit!
The following can be programmed without display module
Assignment of the 4 mA to a required e.g.
min. level / max. distance
Assignment of the 20 mA to a required e.g.
max. level / min. distance
Error indication by the current output (Hold,
3.6 mA or 22 mA)
Damping (10, 30 or 60 sec)
Reset to the factory default
Note:
Current output can also be assigned in inverted mode:
4 mA = 100 % (Full), 20 mA = 0 % (Empty)
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Seite 10 NUS-4 K05/0216
Procedure of programming: press button in the relevant sequence and check the
state of the LED-s. Symbols for the states of the LED-s:
= LED is off, = LED is blinking, = LED is on, = LEDs are blinking
alternatively = Dont care
Minimum level, (0%, empty tank) assignment to 4 mA
Place the sensor at a distance to an object corresponding to the maximum
distance/ the minimum level.
Action Led state following the action
B
B
Use level in tank or a fix target e.g.
the wall
1) Check for a valid ECHO
= Valid ECHO, transmitter
programmable
2) Press NEXT button
steadily
= NUS-4 in programming mode
3) Press UP button
steadily
= 4 mA assigned to the distance
(see picture)
4) Release buttons = Programming completed
Maximum Level, (100 %, full tank) assignment to 20 mA)
Place the sensor at a distance to an object corresponding to the minimum
distance/ the maximum level.
Action Led state following the action
B
B
Use level in tank or a fix target e.g.
the wall
1) Check for a valid ECHO
= Valid ECHO, transmitter
programmable
2) Press NEXT button
steadily
= NUS-4 in programming mode
3) Press DOWN button
steadily
= 20 mA as signed to the distance
(see picture)
4) Release buttons = Programming completed
“Error state” indication by the analogue signal (Check for a valid echo as
above)
As a result of this setting the value of the analogue output will be 3.8 mA; 22 mA or
according last value (hold) until the error is ceased.
Action Led state following the action
1) Press button steadily = NUS-4 in programming mode
2) Press any of the DOWN ,
ENTER
E
, NEXT buttons
steadily
– hold last value
= – 3.6 mA
– 22 mA
3) Release buttons = Programming completed
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NUS-4 K05/0216 Seite 11
Damping time setting (Check for a valid echo as above)
Action Led state following the action
1) Press ENTER E button
steadily
= NUS-4 in programming mode
2) Press any of the NEXT
, UP , DOWN
buttons steadily
– 10 sec
= – 30 sec
– 60 sec
3) Release buttons = Programming completed
RESET: Returning to the default (Check for a valid echo as above)
Action Led state following the action
1) Press NEXT button
steadily
= NUS-4 in programming mode
2) Press ENTER E button
steadily
= Default loaded
Indication of mistakes (by LEDs) made during programming
Action Led state following the action Possible correction
Attempted programming = blinking twice = no Echo Find a valid Echo
Attempted programming = blinking three times = no access
possible
With NUS-400P only See 8.3 (P99)
Attempted programming
= blinking four times = NUS-4 not in
Level Measurement Mode
With NUS-400P only See 8.3 (P01)
8.3 Programming with the Display Module NUS-400P
All features of the unit can be set, such as measurement configuration and
optimisation, 32-point linearisation, dimensions for 11 tanks with different shape
and for 21 different open channels (flume, weir, etc).
Devices with the type number NUS-xxxx xx xxP are already equipped with the
display module.
The NUS-4 is also fully operational without display module. The module is only
needed for programming and/or displaying measurement values.
The unit will measure during programming in accordance with the previous
parameters. The new, modified parameters will only be effective after returning to
the Measurement Mode
If the transmitter is left in Programming Mode by mistake, it will automatically return
to Measurement Mode after 30 minutes and will operate with the parameters
entered during the last completed programming.
NUS-4
Seite 12 NUS-4 K05/0216
The NUS-4 will be delivered with the following Factory Default:
Current output, display and bargraph: LEVEL
Current output and bargraph proportional to the level
4 mA: assigned to the minimum level 0 %
20 mA: assigned to the maximum level 100 %
Error indication by the current output: hold last value
Damping: 60 sec
The display module supports two separately accessible programming modes
representing 2-layers of programming complexity, depending on user choice.
PLUG-IN DISPLAY MODULE
QUICKSET
FULL
PARAMETER
ACCESS
8.3.1 Display Module NUS-400P
Symbols used on the LCD
DIST – Distance
(measuring) mode
LEV – Level (measuring)
mode
VOL – Volume
(measuring) mode
FLOW – Open channel
(flow metering) mode
PROG - Programming
mode (device under
programming)
RELAY – ‘C2’ circuit of
the relay is closed
T1 - TOT1 volume flow
totaliser (resetable
aggregate)
T2 - TOT2 volume flow
totaliser (aggregate)
FAIL - Measurement /
device error
- Level changing
direction
Bargraph assigned to the current
output or echo strength
Symbols used on the frame
M – Metric system
US – US calculation
system
LEDs lit
VALID – presence of
valid echo
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NUS-4 K05/0216 Seite 13
8.3.2 Programming steps with the Display Module NUS-400P
Programming will be performed by the pressing and releasing the relevant one or two
keys (simultaneously).
Single key pressing
ENTER
E
to select parameter address and go to parameter value
to save parameter value and return to parameter address
NEXT to move the blinking (sign of change) of the digit to the left
UP to increase value of the blinking digit
DOWN
to decrease value of the blinking digit
Double key pressing
Press the two keys simultaneously for desired programming step.
Enter into or quit programming modes Basic steps while parameter address is
blinking
Basic steps while parameter value is
blinking
E
Q
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t
F
u
l
l
P
a
r
a
m
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t
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r
A
c
c
e
s
s
E
Return to default*
* LOAD readout ** CANCEL readout
C
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a
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f
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Displ ay defaul t value
* cancellation immediatel y ac t ive
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A
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a
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yy parameter address (P01,
P02…P99)
xxxx parameter value (dcba)
bargraph
yy:xxxx
NUS-4
Seite 14 NUS-4 K05/0216
8.3.3 GET LEVEL Function
Special function used only in level and distance measurement modes
UP
+ DOWN
Notes:
If after pressing ENTER
E
blinking does not spring over from the parameter address to
the parameter value this means that
the parameter is either a read-out type, or
the secret code prevents the modification (see P99)
If the modification of the parameter value is not accepted i.e. the parameter value keeps
blinking after pressing ENTER E,
the modified value is either out of the range, or
the code entered is not a valid code
8.3.4 INDICATIONS OF THE NUS-400P AND LED STATUS
LED Indication
VALID (ECHO)-LED
Lit in case of valid echo
RELAY-LED
ON, when the “C2” circuit of
the relay is closed
NUS-400P indications
Depending on the measurement
one of the below symbols will lit
and the process value displayed
(see P01 chapter 9.1).
Engineering units will be
indicated directly (°C, °F and mA)
and by the lit arrow showing
towards them on the frame
DIST distance
LEV level
VOL volume
FLOW flow
T1/T2 totalised values
FAIL (blinking) Error code
displayed
For paging readouts NEXT
key should be pressed.
The following process values can be
displayed
Volume / Flow – if programmed so
Level – if programmed so
Distance – if programmed so
Warning indications – FAIL blinking
Display screens can be scrolled by pressing
key NEXT
.
To return to the screen of the selected
measurement mode key ENTER
E
should
be pressed (see P01 chapter 6.1)
Temperature can be displayed by pressing
UP
.
(°C/°F)
Current output value can be displayed by
pressing DOWN
.
(mA)
(Vol/Flow)
(Distance)
(Error)
See
for possible readouts
P01
NUS-4
NUS-4 K05/0216 Seite 15
8.3.5 QUICKSET
Recommended as a simple and fast way to start up NUS-4.
QUICKSET programming (aided by 6 screens) is used in
uncomplicated level metering applications to set the 6 basic
parameters. The other parameters can only be modified in the
Full Parameter Access Mode see 9.1 (P01).
Engineering unit for the display (Metric or US)
Maximum measuring distance (H)
Assignment of min level to 4 mA
Assignment of max level to 20 mA
Error indication by the current output
Damping time
QUICKSET program mode can only be used in measuring mode
Level (LEV) (see P01 in 9.1 Measurement Configuration)
Keys Function
ENTER
E
+ DOWN
(press for
min 3 secs!)
Enter or exit QUICKSET programming mode
UP
, DOWN , NEXT Increase/decrease and move left the blinking digit
UP
+ DOWN “GET LEVEL" - display actual level measured by the NUS-4
ENTER
E
Save readout and step to the next screen
NEXT +
UP
Quit Current Output Scaling without saving the modifications
(CANCEL)
NEXT + DOWN Display of the DEFAULT value.
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Seite 16 NUS-4 K05/0216
Screens Actions
APplication
xx= select “EU” (European) for metric or “US” for US engineering units (Use
UP
/ DOWN keys)
yy= indicating “Li” for liquids
DEFAULT: EU
Programming of this parameter will result in loading the
factory default
with the corresponding engineering units.
H = xxxx maximum measuring distance – Distance between transducer
face and tank bottom
Manual: set value (Use UP
/ DOWN / NEXT keys) and save it (by
ENTER
E
)
Automatic: use the “GET LEVEL” function (UP + DOWN ) to obtain
actual measured value with level in tank or a fixed target, i.e. wall. (“GET
LEVEL” functions only if ECHO LED is lit) and save it as above.
DEFAULT: maximum measuring distance [m], see Technical Data Table
4 mA xxxx – level value assigned to 4 mA current output
Manual: set level value (by UP
/ DOWN / NEXT keys) and save it
(by ENTER
E
)
Automatic: use the “GET LEVEL” function (UP + DOWN ) to display the
actual measured value with level in tank or a fixed target, i.e. wall. (“GET
LEVEL” functions only if ECHO LED is lit) and save it as above.
DEFAULT: 0 m (0%, Empty tank)
20 mA xxxx – level value assigned to 20 mA current output
Manual: set level value (Use UP
/ DOWN / NEXT keys) and save it
(by ENTER
E
)
Automatic: use the “GET LEVEL” function (UP
+ DOWN ) to obtain
actual measured value with level in tank or a fixed target, i.e. wall. (“GET
LEVEL” functions only if ECHO LED is lit) and save it as above.
DEFAULT: max. level = max. measuring distance – dead band [m] (100%,
Full tank) (See Technical Data Table)
Error indication by the current output – select “Hold”, 3.8 mA or 22 mA (by
UP
/ DOWN key) and save it as above.
DEFAULT: hold last value
damping time: select required damping time (by UP
/ DOWN key) and
save it as above.
DEFAULT: 60 sec for liquids, 300 sec for solids
Note: – Current output can also be programmed for inverted operation: 4 mA=
100 % (Full), 20 mA= 0 % (Empty)
– Description of failures can be found under the chapter 10 Error codes.
H:xxxx
AP:xxy
y
4:xxxx
Er:xxxx
20:xxxx
dt: xxxx
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NUS-4 K05/0216 Seite 17
8.3.6 Full Parameter Access
Full Parameter Access is the highest programming level to access all features:
Example:
Setting the measurement
Programming of the output
Optimization of measurement
Selection of 11 pre-programmed tank shapes for volume measurement
Selection of 20 pre-programmed measurement channels for the flow
measurement in open channels
Keys Function
ENTER
E
+ NEXT
(press for 3 seconds)
Enter or exit Full Parameter Access programming mode.
In this programming mode, the display will indicate:
yy Parameter Adress (P01, P02 … P99)
xxxx Parameter value (dcba)
Bar graph
Note: Measuring is going on during programming in accordance with
the old parameter set. New parameter set will be valid after returning
to the Measurement to the Programming Mode.
Steps and indications of the Full Parameter Access programming mode
pressing Keys while Parameter Address is blinking while Parameter Value is blinking
ENTER
E
Go to the Parameter Value
Save the modification of the
Parameter Value and return to the
Parameter Address
NEXT + UP Cancel all modifications of the actual
programming phase. Pressing for 3
sec is required while CANCEL will be
displayed for warning
Neglect the modification of the
Parameter Value.
and return to the Parameter Address
without saving the modifications
NEXT + DOWN Reset entire device to Factory
Default.
Since this action will reset all
parameters, “LOAD” will appear on
the display:
- to confirm, press
- to escape, press any other key
- Exception: clearing TOT 1 (See at
P77)
Display default of the Parameter
Values
(it can be saved by pressing
ENTER
E
)
NEXT Move blinking (changeability) of the digit to the left
UP / DOWN Modify the blinking digit (increase, decrease) or scroll up/down
yy:xxxx
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9. Parameters – Description and Programming
9.1 Measurement Configuration
P00: - cba Application/Engineering Units
Programming of this parameter will result in loading the factory default with the
corresponding engineering units.
a Operating (measurement) mode
0
Liquid level measurement
b
Engineering units
(according to “c”)
Attention: mind the sequence!
When programming this parameter the
right value “a” will be blinking first.
Metric
US
0
m ft
1
cm inch
c Calculation system
0
Metric
1
US
FACTORY DEFAULT: 000
P01: - ba Measurement Mode – Bargraph
Parameter value „a” will determine the basic measurement value that will be displayed and
proportional with the current output. Depending on the value of “a” process values as listed in
the 3d column can also be displayed by pressing NEXT
. For return to the display of the
basic value the ENTER
E
key should be pressed.
a Measurement
Mode
Display
symbol
Displayed values
Attention: mind the
sequence!
When programming this
parameter the
right value “a” will be
blinking first.
0
Distance
DIST
Distance
1
Level
LEV
Level, Distance
2
Level in
percentage
LEV%
Level%, Level, Distance
3
Volume
VOL
Volume, Level, Distance
4
Volume in
percentage
VOL%
Volume%, Volume, Level,
Distance
5
Flow
FLOW
Flow, TOT1, TOT2, Level,
Distance
Parameter value “b” will determine that the height of the Bargraph will be proportional to the
current output or to the Echo strength.
b Bargraph indication
0
Echo strength
1
Current output FACTORY DEFAULT: 11
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NUS-4 K05/0216 Seite 19
P02: - cba Calculation units
a Temperature Attention: mind the sequence!
When programming this parameter the right
value “a” will be blinking first.
0
°C
1
°F
This table is interpreted according to P00(c), P01(a) and P02(c) and is irrelevant in case of
percentage measurement ( P01(a)= 2 or 4 )
b Volume Weight (set also P32) Volume flow
Metric US Metric US Metric US
0
m
3
ft3 - lb (pound) m3/time ft3/time
1
liter gallons tons tons liter/time gallons/time
c Time
0
Sec
1
Min
2
Hour
3
Day FACTORY DEFAULT: 000
P03: - - - a Values displayed - Rounding
It is important to keep in mind that the instrument is measuring distance as basic quantity.
Measured Distance Resolution
The resolution depending on the distance can be
considered as a kind of rounding that will be contained in
all further value (of level, volume or volume flow)
calculated. Therefore if programmed for DIST or LEV
measurement the setting of P03 is irrelevant.
X
min
– 2m 1mm
2m – 5m 2mm
5m – 10m 5mm
10m over 10mm
Displayed VOL or FLOW
Displaeyed Value Display Format
Obviously the decimal position will be shifted with
increasing value displayed. (See table at the left).
Values over one million will be displayed in exponential
format whereas the value (e) represents the exponent.
Over the value of 1x10
10
Err4 (overflow) will be displayed.
0,000 – 9,999 x,xxx
10,000 – 99,999 xx,xx
100,000 – 999,999 xxx,x
1000,000 –
9999,999
xxxx,x
10000,000 –
99999,999
xxxxx,x
100000,000 –
999999,999
xxxxxx,x
1 millió –
9,99999*10
9
x,xxxx : e
(exponential
format)
1*10
10
over (overflow) Err4
Rounding
Parameter Value
“a”
Steps In The
Displayed Value
A couple of millimetres of fluctuation of the basic DIST
value (e.g. due to waves) will be enlarged by the
mathematical operations. This enlarged fluctuation in
displaying VOL or FLOW can (if disturbing) be avoided by
rounding to be set in P03. Rounding value 2, 5, 10 etc
represents the steps by which the calculated value will be
changed in its (one or two) last digit(s).
Examples:
P03=1 steps by 2: 1,000; 1,002; 1,004
P03=5 steps by 50: 1,000; 1,050; 1,100 or 10,00;
10,05(0); 10,10(0); 10,15(0)
(the 0 from the steps 50, 100, 150 etc will not be
displayed)
0
1 (no rounding)
1
2
2
5
3
10
4
20
5
50
FACTORY DEFAULT: 0
NUS-4
Seite 20 NUS-4 K05/0216
P04 Maximum Distance to be Measured (H)
The maximum distance to be measured is the greatest distance between the surface of the
transducer and the level to be measured.
This is the only parameter that has to be programmed for each application other than
distance (however to avoid disturbing effect of possible multiple echos it is suggested
to do this in distance measurement applications too).
Values of the maximum measuring distance will be displayed as below.
Engineering Unit Display Format
m x,xxx or xx,xx
cm xxx,x
ft xx,xx or xxx,x
inch xxx,x
The factory programmed, greatest distances (DEFAULT values) which can be measured by
the units are listed in the table below. For the actual application the maximum distance to be
measured i.e. the distance between the sensor and the bottom of the tank should be entered
in P04.
To obtain the best accuracy, measure this distance in the empty tank with the NUS-4 by using
the “GET LEVEL” function (by double key pressing of UP
+ DOWN ) provided the bottom
is flat. Enter the actual measured value displayed as P04.
Model Factory default of maximum measuring distance (m/ft)
NUS-4x04 4/13
NUS-4x06 6/20
NUS-4x08 8/26
NUS-4x10 10/33
NUS-4x15 15/49
NUS-4x25 25/82
FACTORY DEFAULT: acc. to the table
P05: Minimum measuring distance (Dead zone- Close-end blocking)
The NUS-4 will not accept any echo within the blocking distance set here.
Automatic Close-end-blocking (Automatic Dead Band control)
By using the factory default value, the unit will automatically set the smallest possible closeend-blocking distance i.e. the dead band.
Manual close-end-blocking
Manual close-end-blocking should be used for example to block out the echo originating from
the bottom rim of a stand-off pipe or from any object protruding into the ultrasonic cone near to
the transmitter.
By entering a value, higher than the factory default, the minimum measuring range will be
extended and fixed to the specified value.
To return to the factory programmed (DEFAULT value) of the minimum measuring distance press
NEXT
+ DOWN .
Model Factory default of minimum measuring distance Xm (m/ft)
NUS-4x04 0,2 / 0,65
NUS-4x06 0,25 / 0,82
NUS-4x08 0,35 / 1,2
NUS-4x10 0,35 / 1,2
NUS-4x15
0,45 / 1,5
NUS-4x25 0,60/2,02
FACTORY DEFAULT: automatic dead band control
NUS-4
NUS-4 K05/0216 Seite 21
P06: Far end blocking
Far end blocking is used to neglect
incorrect level/volume readings and
output actions below a pre-set level
programmed in P06.
A). Level measurement
The far-end blocking can be used to
avoid disturbing effect of stirrer or
heaters at the bottom of the tanks.
If the level of the medium sinks
below the blocked out range:
- ”Sub 0” will be indicated for the level
and volume
- Distance value is not interpretable
- Current output will hold the value
corresponding to
the far end blocking level
P06
Far end blocking
Level
Volume
"SUB 0" indication
below this level
4
m
A
m
A
2
0
m
A
H
If the medium level is above the blocked out range:
The calculation of level and volume will be based on the programmed tank dimensions, therefore the
measured or calculated process values will not be influenced in any way, by the far end blocking value.
B). Open channel flow metering
Far end blocking will be used for those small levels below which the accurate volume flow
calculation is no longer possible.
If the liquid level in the flume/weir falls below the blocked out range:
The NUS-4 will act as follows:
- Indicate ”No Flow” on the Display
- Hold last valid data on the current output.
If the level in the flume/weir is above the blocked out range:
The calculation of volume flow will be based on the programmed flume/weir data; therefore the
measurement values will not be influenced in any way, by the far end blocking value.
FACTORY DEFAULT: 0
9.2 Current Output
P10: Value (of distance, level, volume or flow) assigned to 4 mA current output
P11: Value (of distance, level, volume or flow) assigned to 20 mA current output
Values are interpreted according to P01(a). Please note that in case of programming for (LEV
or VOL) % measurement the min and max value has to be entered in the relevant engineering
units of LEV (m, ft) or VOL (m
3
, ft3).
Assignment can be made so that the proportion between the change of the (measured or
calculated) process value and the change of the current output be either direct or inverse. E.g.
lev 1 m assigned to 4mA and lev 10 m assigned to 20 mA represents direct proportion and lev
1 m assigned to 20 mA and lev 10 m assigned to 4 mA represents the inverse proportion.
FACTORY DEFAULT:
P10 0 level (max distance)
P11 max level (min distance) H
NUS-4
Seite 22 NUS-4 K05/0216
P12: - - - a Error indication by the current output
In case of error the NUS-4 will provide one of the current outputs below. (For errors and their
interpretation see Chapter 10).
a ERROR INDICATION (ACCORDING TO NAMUR)
0
Hold last value
1
3.8 mA
2
22 mA
FACTORY DEFAULT: 0
9.3 Relay Output
P13: - - - a Relay function
a Relay function Also set
0
DIFFERENTIAL LEVEL
CONTROL
(Hysteresis control)
Relay is energised if the measured
or calculated value exceeds the
value set in P14 Relay is deenergised if the measured or
calculated value descends under
the value set in P15.
Relay
Energised:
De-energised:
C1 C2
Time
P14
P15
Level
P14, P15
There is a need to set
(in level min 20mm)
hysteresis between
P14 and P15
P14 > P15 – normal
operation
P14 < P15 – inverted
operation
1
Relay is energised in case of Echo Loss -
2
Relay is de-energised in case of Echo Loss -
3
COUNTER
Used for open channel flow
metering.
A 140 msec pulse is generated
every 1, 10, 100, 1.000 or 10.000
m
3
according to P16.
Relay
10m
3
Energised:
De-energised:
C1 C2
140 ms
TO
T
Time
10m (P16)
3
20m
3
P16= 0: 1m
3
P16= 1: 10 m
3
P16= 2: 100 m
3
P16= 3: 1.000 m
3
P16= 4: 10.000 m3
In de-energised state of the device the „C1” circuit is closed.
The „Relay” LED is on when the „C2” circuit is closed.
FACTORY DEFAULT: P13=2
P14: - - - - Relay parameter – Operating value
P15: - - - - Relay parameter – Releasing value
P16: - - - - Relay parameter – Pulse rate P13(3)
FACTORY DEFAULT: P14=0, P15=0, P16=0
NUS-4
NUS-4 K05/0216 Seite 23
9.4 Measurement Optimisation
P20: - - - a Damping
This parameter can be used to reduce unwanted fluctuation of the display and output.
a
Damping
time
(second
s)
LIQUIDS
None/moderate
fume or waves
Heavy/dense
fume or
turbulent waves
0
no filter
1
3 applicable not recommended
2
6 recommended applicable
3
10 recommended recommended
4
30 recommended recommended
5
60 recommended recommended
FACTORY DEFAULT: 60 sec
P22: - - - a Dome top tank compensation
This parameter can be used to reduce disturbing effect of possible multiple echos.
a Compensation Applied
0
OFF In case the NUS-4 is not mounted in the centre of the top and the top is
flat.
1
ON In case the NUS-4 is mounted in the centre of a tank with dome-shaped
top
FACTORY DEFAULT: 0
P24: - - - a Target tracking speed
In this parameter evaluation can be speed up at the expense of the accuracy.
a Tracking speed Remark
0
Standard For most applications
1
Fast For fast changing level
2
Special
Only for special applications (measuring range is reduced to 50% of the
nominal value)
The measuring window is inactive and the NUS-4 will respond practically
instantly to any target. Recommended to fast target tracking, but usually not
applicable for level metering.
FACTORY DEFAULT: 0
NUS-4
Seite 24 NUS-4 K05/0216
P25: - - - a Selection of Echo within the measuring window
A so-called measuring window is formed around the echo signal. The position of this
measuring window determines the flight time for calculation of the distance to the target. (the
picture below can be seen on the test oscilloscope)
Received
signal
amplitude
Echo 1.
Echo 2.
Some applications involve multiple (target + disturbing) echoes even within the measuring
window. Basic echo selection will be done by the Quest + software automatically. This
parameter only influences the echo selection within the measuring window.
a Echo in the
window to be
selected
Remark
0
With the highest
amplitude
For most applications (both with liquids and solids)
1
First one
For liquids applications with multiple
echoes within the Measuring Window
FACTORY DEFAULT: 0
P26: Level elevation rate (filling speed) (m/h)
P27: Level descent rate (emptying speed) (m/h)
These parameters provide additional protection against echo loss in applications involving very
heavy fuming.
The parameters must not be smaller than the fastest possible filling/emptying rate of the actual
technology.
For all other applications, use the factory default setting.
FACTORY DEFAULT:
2000 for both P26 and P27
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NUS-4 K05/0216 Seite 25
P28: - - - a Echo loss indication
a
Echo loss
indication
Remark
0
Delayed
indication
During echo-loss, display and analogue output will hold last value.
If the echo-loss prevails for 10 sec plus the time period set in P20 (damping
time), the reading on the display will change to "no Echo" and the outputs
will change according to the "Error Indication Mode" pre-set in P12
Readout
holding value
for "P20" time
t
No Echo
Echo loss LED
goes out
Current output
Holding value
P12 = 2
holding value
current 22 mA
P12 = 1
current 3,8 mA
P12 = 0
value blinking
for "P20" time
1
No indication
For the time of echo-loss, display and analogue output will hold last value.
2
Advance to full
During echo-loss in case of filling, the reading on the display and analogue
output will shift towards the "full" tank state with a level elevation rate (filling
speed) pre-set in P26
3
Immediate
indication
In case of echo-loss, the display will immediately change to “no Echo”, and
the outputs will change according to the "Error Indication Mode" pre-set in
P12
4
Empty tank
indication
Echo-loss may occur in completely empty tanks with a spherical bottom due
to deflection of the ultrasonic beam, or in case of silos with an open outlet.
If the echo is lost when the tank is completely empty, the indication will
correspond to empty tank, in all other cases echo-loss indication will
function according to the “Delayed”.
FACTORY VALUE: 0
P29: Blocking out of disturbing object
One fixed object in the tank, disturbing the measurement, can be blocked out.
Enter distance of the object from the transducer. Use the Echo Map (P70) to read out the
precise distance of disturbing objects.
FACTORY DEFAULT: 0
NUS-4
Seite 26 NUS-4 K05/0216
P31: Sound velocity at 20C (m/sec or ft/sec depending on P00(c) )
Use this parameter if the sound velocity in the gases above the measured surface differs
largely from that of in air.
Recommended for applications where the gas is more or less homogeneous. If it is not, the
accuracy of the measurement can be improved using 32-point linearisation (P48, P49).
For sound velocities in various gases see section “Sound Velocities”.
FACTORY DEFAULT: Metric (P00: “EU”): 343.8 m/s, US (P00: “US”): 1128 ft/s
P32: Specific gravity
If you enter a value (other than “0”) of specific gravity in this parameter, the weight will be
displayed instead of VOL.
FACTORY DEFAULT: 0 [kg/dm
3
] or [lb/ft3] depending on P00 (c)
9.5 Volume Measurement
P40: - - ba Tank shape
ba Tank shape Also to be set
Attention!
The value „a”
determining the shape
of the tank should be
set first.
b0
Standing cylindrical tank shape (value of
“b” as below)
P40 (b), P41
01
Standing cylindrical tank with conical
bottom
P41, P43, P44
02
Standing rectangular tank (with chute)
P41, P42,
(P43, P44, P45)
b3
Lying cylindrical tank shape (value of “b”
as bellow)
P40 (b), P41, P42
04
Spherical tank
P41
FACTORY DEFAULT: 00
P41-45: Tank dimensions
Standing cylindrical tank
with hemispherical bottom
Standing cylindrical tank
with conical bottom
Standing rectangular tank
with or without chute
b=0
P40
b=1
b=2
b=3
If no chute
P43, P44 and P45=0
Lying cylindrical tank Spherical tank
b=0
b=1
b=2
b=3
P40
NUS-4
NUS-4 K05/0216 Seite 27
9.6 Volume Flow Measuring
P40: - - ba Devices, formula, data
ba Devices, formula, data Also to be set
00
Under preparation
01
Under preparation
02
Under preparation
03
Under preparation
04
Under preparation
05
Under preparation
06
Under preparation
07
Under preparation
08
Under preparation
09
General PARSHALL flume
P46, P42
10
PALMER-BOWLUS (D/2)
P46, P41
11
PALMER-BOWLUS (D/3)
P46, P41
12
PALMER-BOWLUS (Rectangular)
P46, P41, P42
13
Khafagi Venturi
P46, P42
14
Bottom-step weir
P46, P42
15
Suppressed rectangular or BAZIN weir
P46, P41, P42
16
Trapezoidal weir
P46, P41, P42
17
Special trapezoidal (4:1) weir
P46, P42
18
V-notch weir
P46, P42
19
THOMSON (90°-notch) weir
P46
20
Circular weir
P46, P41
21 General flow formula: Q[l/s]= 1000*P41*h
P42
, h [m] P46, P41, P42
General PARSHALL flume
FACTORY DEFAULT: 0
NUS-4
Seite 28 NUS-4 K05/0216
P41-45: Flume/weir dimensions
FACTORY DEFAULT: 0
P40= 00
.
KOBOLD Parshall Channels
(in preparation)
P40= 09
General Parshall flume
0.305 < P42(width) <2.44
026.0
569.1
3
305.0/h372s/mQ
P42
P42
2.5 < P42
Q[m
3
/s]= K*P42*h
1.6
P= 2/3*A
A
h
P46
Sensor
Sensor
P42
P
P40= 10
Palmer-Bowlus (D/2) flume
Q[m
3
/s]= f(h1/P41)*P41
2.5
,
where h1[m]= h+(P41/10)
P04
P46
h
P41
D
D/10
1
2
D/2
P40= 11
Palmer-Bowlus (D/3) flume
Q[m
3
/s]= f(h1/P41)*P41
2.5
,
where h1[m]= h+(P41/10)
P04
P46
h
P41
D
D/10
1
2
D/3
P40= 12
Palmer-Bowlus (Rectangular) flume
Q[m
3
/s]= C*P42*h
1.5
,
where C= f(P41/P42)
D
P42
P46
P04
h
D/10
P41
P42[m] K
3.05 2.450
4.57 2.400
6.10 2.370
7.62 2.350
9.14 2.340
15.24 2.320
NUS-4
NUS-4 K05/0216 Seite 29
P40= 13
Khafagi Venturi flume
Q[m
3
/s]= P42*1.744*h
1.5
+ 0.091*h
2.5
15cm
P46
Sensor
h
P42
Sensor
P40= 14
Bottom step weir
0.0005 < Q[m3/s] < 1
0.3 < P42[m] < 15
0.1 < h[m] < 10
Q[m
3
/s]= 5.073*P42*h
1.5
Accuracy: 10%
P40=14
P46
P42
h
P40= 15
Suppressed rectangular or BAZIN weir
0.001 < Q[m3/s] < 5
0.15 < P41[m] < 0.8
0.15 < P42[m] < 3
0.015 < h[m] < 0.8
Q[m
3
/s]=
1.7599*[1+(0.1534/P41)]*P42*(h+0.001)
1.5
Accuracy: 1%
P40=15
P04
P46
h
P42
P41
P40= 16
Trapezoidal weir
0.0032 < Q[m3/s] < 82
20 < P41[°] < 100
0.5 < P42[m] < 15
0.1 < h[m] < 2
Q[m3/s]=
1.772*P42*h1.5+1.320*tg(P41/2)*h2.47
Accuracy: 5%
P40=16
P04
P46
h
P42
P41
P40= 17
Special Trapezoidal (4:1) weir
0.0018 < Q[m3/s] < 50
0.3 < P42[m] < 10
0.1 < h[m] < 2
Q[m3/s]= 1.866*P42*h1.5
Accuracy: 3%
1
4
P40=17
P46
P04
h
P42
P40= 18
V-notch weir
0.0002 < Q[m3/s] < 1
20 < P42[°] < 100
0.05 < h[m] < 1
Q[m3/s]= 1.320*tg(P42/2)*h2.47
Accuracy: 3%
P40=18
h
P46
P42
P04
NUS-4
Seite 30 NUS-4 K05/0216
P40= 19
THOMSON (90°-notch) weir
0.0002 < Q[m3/s] < 1
0.05 < h[m] < 1
Q[m3/s]= 1.320*h2.47
Accuracy: 3%
P46
P40=19
P04
h
90
P40= 20
Circular weir
0.0003 < Q[m3/s] < 25
0.02 < h[m] < 2
Q[m
3
/s]= m*b*D
2.5
m= 0.555+0.418h/P41+(P41/(0.11*h))
Accuracy: 5%
P40=20
P46
P04
h
P41
P46 Distance between transducer face and level of Q=0
P46 is always the distance between the transducer face and the level, where the volume flow is 0.
FACTORY DEFAULT: 0
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NUS-4 K05/0216 Seite 31
9.7 32- Point Linearisation
P47: - - - a Linearisation
Linearisation is the method of assigning requested (calibrated or calculated) level, volume or flow to
values measured by the transmitter.
It can be used for instance if the sound velocity is not known (LEVELLEVEL) or in the case of tank with
other shape than under 6.4 or open channel other than under 6.5 (LEVEL VOLUME or LEVEL
FLOW).
a Linearisation
0
OFF (FACTORY DEFAULT)
1
ON
P48: Linearisation table
Data-pairs of the linearisation table are handled in a 2x32 matrix, consisting of two columns.
Left column “L” Right column “r”
LEVEL measured LEVEL or VOLUME or FLOW to be transmitted and displayed
The left column values (indicated on the display as “L”) contain the measured LEVEL values.
The right column values (indicated on the display as “r”) contain the calibrated values and are interpreted
according to the selected measurement value in P01(a).
}
+
+
+
+
+
Number of data pairs
in the table
Level
volume
flow
Enter
the table
Address of data pair
Left hand
column
Level
measured
value
Cancelin g last modification
Right
hand
column
to be transmitted
and displayed
Entering values
Copying measured value
Neg lect modification (CANC EL)
Entering "0 " (c lo sing up the tble)
Exit the
table
Conditions of correct programming of the data pairs
Left column “L” Right column “r”
L(1)= 0 r(1)
L(i) r(i)
: :
L(j) r(j)
The table must always start with: L(1)= 0 and r(1)= value (assigned to 0 level)
The table must be ended either with the 32
nd
data pair i.e. j=32 or if the linearisation table contains less than 32
data-pairs j<32, the table must be closed by a level value “0” e.g. L(j<32)= 0.
The NUS-4 will ignore data after recognising level value “0” with serial number other than “1”.
If the above conditions are not met, error codes will be displayed (see chapter: Error Codes).
NUS-4
Seite 32 NUS-4 K05/0216
9.8 Informational Parameters (Read Out Parameters)
P60: Overall operating hours of the unit (h)
Indication varies according to the elapsed time:
Operating hours Indication form
0 to 999.9h xxx,x
1000 to 9999h xxxx
Over 9999h X,xx: e meaning x,xx 10e
P61: Time elapsed after last switch-on (h)
P62: Operating hours of the relay (h)
P63: Number of switching cycles of the relay (h)
Indications are the same as in P60.
P64: Actual temperature of the transducer (°C/°F)
P65: Maximum temperature of the transducer (°C/°F)
P66: Minimum temperature of the transducer (°C/°F)
In case of a breaking in the temperature circuit „tErr” will be displayed. The transmitter will perform temperature
correction corresponding to 20ºC.
.
P70: Number of Echoes / Echo Map
NUS-4 is monitoring the echo
conditions.
Entering this parameter will save
the actual echo map.
Number, distance and amplitude
of these echoes can be read-out
one by one.
yy
: xxxx
yy
: xxxx
70
: _ _ XX
yy
: xxxx
yy
: xxxx
Number of
yy
Seri al number
of the echo
xx
value of
DIST or AMPL
echos
(DISTANCE)
(DISTANCE)
(AMPLITUDE)
(AMPLITUDE)
P71: Distance of the of Measuring Window
P72: Amplitude of the Echo in the Measuring
P73: Echo Position (time) :(ms)
P74: Signal To Noise Ratio
Ratio Measurement conditions
Over 70 Excellent
Between 70 and 30 Good
Under 30 Unreliable
P75: Blocking Distance
The actual close-end blocking distance will be displayed (provided automatic blocking was selected in
P05).
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NUS-4 K05/0216 Seite 33
9.9 Additional Parameters of Flow Metering in Open Channels
P76: Head of flow (LEV)
The Headwater value can be checked here. This is the “h” value in the formula for flow calculation.
P77: TOT1 volume flow totaliser (resetable)
P78: TOT2 volume flow totaliser (non-resetable)
Resetting TOT1 totaliser:
1). Go to the parameter P77.
2). Press NEXT
+ DOWN simultaneously.
3). Display will indicate: “t1 Clr”.
4.) Press ENTER
E
to delete.
9.10 Test Parameters
P80: Current output test (mA)
Going to this parameter, the actual current output (corresponding to the measured process value) will be
displayed. By pressing
ENTER
E
the (now blinking) current value can be set for any value between
3,9
and 20.5 mA. The current output has to show the same value which can be checked by an ampere meter,
according to the description under 4.4. Press ENTER
E
to quit test mode and return the parameter
address
P81: - - - a Relay test
The actual state of the relay can be seen on the display (code according to the table below and symbol on
the screen). Test the relay by pressing UP
and DOWN
while observing change of the symbol and
the code or listening to the ticking of the relay or checking on-off resistance by a suitable resistance
meter.
a Relay state
0 De-energised
1 Energised
P97: b:a.aa Software code
a.aa: Number of the software version
b: Code of the special version
9.11 Simulation
This function enables the user to test the settings of the outputs. The NUS-4 can simulate the static or
continuous change of level according to the simulation cycle time, high level and low level set in P85, P86
and P87. (The simulation levels must be within the programmed measuring range set in P04 and P05.)
After selecting simulation type in P85 and setting simulation values Measurement Mode has to be reentered. While the NUS-4 is in simulation mode the DIST, LEV or VOL symbol will be blinking. To quit
Simulation Mode P84= 0 should be set.
P84: - - - x Selection of the simulation
X Simulation type
P87
P86
P85
LEV [m]
t [sec]
0
No simulation
1
The level changes continuously up and down between the
level values set in P86 and P87 with a cycle time set in P85
NUS-4
Seite 34 NUS-4 K05/0216
P85: Cycle time for simulation (sec)
P86: Simulated low level value (m)
P87: Simulated high level value (m)
9.12 Access Lock
P99: dcba Access Lock by Secret Code
The purpose of this feature is to provide protection against accidental (or intentional) re-programming of
parameters.
The Secret Code can be any value other than 0000. Setting a Secret Code will automatically be activated
when the NUS-4 is returned to the Measurement Mode. If the Secret Code is activated, the parameters
can only be viewed, this is indicated by the a flashing colon “:” between the parameter address and the
parameter value.
In order to program the device locked by a secret code, first enter the Secret Code in P99. The Secret
Code is re-activated each time the NUS-4 is returned to Measurement Mode.
To delete the Secret Code, enter the Secret Code in P99. After confirming it with [E] re-enter the
parameter P99 and enter 0000.
[dcba (Secret Code) ] [E] [E] [0000] [E] Secret Code deleted
10. Error Codes
Error
Code
Error description Causes and solutions
1
Memory error Contact local agent
No Echo
Echo loss
No echo received (no reflection)
See Action 5 and 6
3
Hardware error Contact local agent
4
Display overflow Check settings
5
Sensor error or improper
installation/mounting, level in the dead band
Verify sensor for correct operation and check for correct
mounting according to the User’s Manual
6
The measurement is at the reliability threshold
Better location should be tried.
7
No signal received within the measuring range
specified in P04 and P05
Review programming, also look for installation mistake
12
Linearisation table error: both L(1) and L(2)
are zero
(no valid data-pairs)
See the Section ”Linearisation”
13
Linearisation table error: there are two same
L(i) data in the table
See the Section “Linearisation”
14
Linearisation table error: the r(i) values are not
monotone increasing
See the Section “Linearisation”
15
Linearisation table error: measured Level is
higher than the last Volume or Flow data-pair
See the Section “Linearisation”
16
The check sum of the program in the
EEPROM is wrong
Contact local agent
17
Parameter consistency failure Check programming
18
Hardware failure Contact local agent
NUS-4
NUS-4 K05/0216 Seite 35
11. Parameter Table
Par. Page Description Value Par. Page Description Value
dcba
dcba
P00
18 Application/Engineering Units
P28
25 Echo loss indication
P01
18 Measurement Mode
P29
25 Blocking out of disturbing object
P02
19 Calculation units
P30
N.A.
P03
19 Rounding
P31
26 Sound velocity in different gases
P04
20 Maximum Measuring Distance
P32
26 Specific gravity
P05
20 Minimum Measuring Distance
P33
N.A.
P06
21 Far End Blocking
P34
38 Logging mode
P07
N.A.
P35
39 Log value 1 and log value 2
P08
N.A.
P36
39 Log value 1 and log value 2
P09
N.A.
P37
40 Real-time clock, year
P10
21 Value assigned to „4 mA”
P38
40 Real-time clock, month and day
P11
21 Value assigned to „20 mA”
P39
40 Real-time clock hour and minute
P12
22 “Error” indication by the current output
P40
27 Selection of tank shape/ open
channel
P13
22 Relay function
P41
26 Dimensions of tank / Open Channel
P14 Fehle
r!
Text
mark
e
nicht
defini
ert.
Relay parameter – Operating value
P42
26 Dimensions of tank / Open Channel
P15
22 Relay parameter – Releasing value
P43
26 Dimensions of tank / Open Channel
P16
22 Relay parameter – Pulse rate
P44
26 Dimensions of tank / Open Channel
P17
N.A.
P45
26 Dimensions of tank / Open Channel
P18
N.A.
P46
30 Dist. Btw. Transducer face and level
of Q=0
P19
N.A.
P47
31 Linearisation
P20
23 Damping
P48
31 Linearisation table
P21
N.A.
P49
N.A.
P22
23 Dome top tank compensation
P50
N.A.
P23
N.A.
P51
N.A.
P24
23 Target tracking speed
P52
N.A.
P25
24 Selection of Echo in the measuring
window
P53
N.A.
P26
24 Level elevation rate
P54
N.A.
P27
24 Level descent rate
P55
N.A.
Par. Page Description Value Par. Page Description Value
P56
N.A.
P78
33 TOT2 volume flow totaliser
P57
N.A.
P79
N.A.
P58
N.A.
P80
33 Current generator test
P59
N.A.
P81
33 Relay test
P60
32 Overall operating hours of the unit
P82
N.A.
P61
32 Time elapsed after last switch-on
P83
N.A.
P62
32 Operating hours of the relay
P84
33 Simulation mode
P63
32 Number of switching cycles of the
relay
P85
34 Simulation cycle time
P64
32 Actual temperature of the transducer
P86
34 Simulation low level
P65
28 Maximum temperature of the
transducer
P87
34 Simulation high level
P66
32 Minimum temperature of the
transducer
P88
N.A.
P67
N.A.
P89
N.A.
P68
N.A.
P90
N.A.
P69
N.A.
P91
N.A.
P70
32 Echo Map
P92
N.A.
P71
32 Distance of the measuring window
P93
N.A.
P72
32 Amplitude of the in the measuring
P94
N.A.
NUS-4
Seite 36 NUS-4 K05/0216
Par. Page Description Value Par. Page Description Value
window
P73
32 Distance of the in the measuring
window
P95
N.A.
P74
32 Signal / noise ratio
P96
N.A.
P75
32 Blocking Distance
P97
33 Software code
P76
33 Waterhead of the flow
P98
N.A.
P77
33 TOT1 volume flow totaliser
P99
34 Access lock
12. Sound Velocities in Different Gases
The following table contains the sound velocity of various gases measured at.
Gases Sound
Velocity (m/s)
Gases Sound
Velocity (m/s)
Acetaldehyde C2H4O 252.8 Ethylene C2H4 329.4
Acetylene C2H2 340.8 Helium He 994.5
Ammonia NH3 429.9 Hydrogen
sulphide
H2S 321.1
Argon Ar 319.1 Methane CH4 445.5
Benzene C6H6 183.4 Methanol CH3OH 347
Carbon dioxide CO2 268.3 Neon Ne 449.6
Carbon
monoxide
CO 349.2 Nitrogen N2 349.1
Carbon
tetrachloride
CCl4 150.2 Nitrogen
monoxide
NO 346
Chlorine Cl2 212.7 Oxygen O2 328.6
Dimethyl ether CH3OCH3 213.4 Propane N.A. C
3H8
246.5
Ethane C2H6 327.4 Sulphur
hexafluoride
SF6 137.8
Ethanol C2H3OH 267.3
NUS-4
NUS-4 K05/0216 Seite 37
13. T echnical Data
Measuring principle: Ultrasonic, echo time measurement
Measuring range: NUS-4x04 0.20-4 m liquids, 0.2-1.6 m solids
NUS-4x06 0.25-6 m liquids, 0.25-2.4 m solids
NUS-4x08 0.35-8 m liquids, 0.5-3.2 m solids
NUS-4x10 0.35-10 m liquids, 0.35-4 m solids
NUS-4x15 0.45-15 m liquids, 0.45-6 m solids
NUS-4x25 0.60-25 m liquids, 0.6-10 m solids
Frequency: NUS-4x04 80 kHz
NUS-4x06 80 kHz
NUS-4x08 60 kHz
NUS-4x10 60 kHz
NUS-4x15 40 kHz
NUS-4x25: 20 kHz
Measuring accuracy (at 20 °C): ± 0.2 % of measured value
+ 0.05 % of F.S.
Resolution: depends on measuring distance
< 2 m : 1 mm
2..5 m: 2 mm
6..10 m: 5 mm
>10 m: 10 mm
Installation: perpendicular to product surface
Process temperature: -30...+90 °C
Ambient temperature: -30..+70 °C
-25..+70 °C (with programming unit)
Operating pressure: 0.5..3 bar abs. (for use <1 bar abs contact Kobold)
Housing: Aluminium, powder coated
Sensor and connection: Polypropylene, PVDF
Process connection: NUS-4x04: G 1 1/2*, 1 1/2 NPT
NUS-4x06, NUS-4008: G 2*, 2 NPT
NUS-4x10: Flange DN 80, ANSI 3”
NUS-4x15: Flange DN 100, ANSI 5”
NUS-4x25: Flange DN 150, ANSI 6”
*G-thread with nut and EPDM-gasket
Electrical connection: 2x M20x1,5 cable gland, cable dia. 6...12 mm
and 2 x ½” NPT for cable gland;
wire cross section: 0.5 ... 1.5 mm2
Switching output: Relay (SPDT) 30 V
DC
, 1 A
Analogue output: 4...20 mA (3.9 … 20.5 mA), galvanically isolated,
protection against surge transients
Load: max. (Us – 11.4 V) / 0.02 A,
Supply voltage: 12...36 V
DC
, 2-wire (reverse polarity protected)
Display (pluggable): 6-digit LCD,
symbols and bar graph
Protection: Sensor IP 68, Housing: IP 67
NUS-4
Seite 38 NUS-4 K05/0216
Conical beam diameter (r)
L NUS-
4x04
NUS4x06
NUS4x08
NUS4x10
NUS4x15
NUS4x25
1 0.15 m 0.14 m 0.18 m 0.16 m 0.21 m 0.27 m
2 0.25 m 0.23 m 0.30 m 0.25 m 0.30 m 0.39 m
4 0.46 m 0.40 m 0.54 m 0.42 m 0.47 m 0.64 m
6 - 0.58 m 0.79 m 0.60 m 0.65 m 0.88 m
8 - - 1,03 m 0.77 m 0.82 m 1.13 m
10 - - - 0.95 m 1.00 m 1.37 m
15 - - - - 1.43 m 1.98 m
25 - - - - - 3.21 m
α
6° 5° 7° 5° 5° 7°
14. Order Codes
Example: NUS-4004 R8 340
Model Sensor
material
Measuring range Connection Supply voltage Output/
display
NUS-4
0= Poly-
propylene
9= PVDF
04= 0.2-4 m liquids
0.2-1.6 m solids
R8= G 1 1/2
N8= 1 1/2 NPT
3 = 12-36 V
DC
40= 4-20 mA
R0=4-20 mA and
Relay
4P=pluggable
programming unit
with LCD-Display,
4-20 mA
RP= pluggable
programming unit
with LCD-Display,
4-20 mA, Relay
06= 0.25-6 m liquids
0.25-2.4 m solids
R9= G 2
N9= 2 NPT
08= 0.35-8 m liquids
0.5-3.2 m solids
R9= G 2
N9= 2 NPT
10= 0.35-10 m liquids
0.35-4 m solids
FB= Flange DN 80
AB= ANSI-Flange 3“
15= 0.45-15 m liquids
0.45-6 m solids
FD= Flange DN 125
AD= ANSI-Flange 5“
25= 0.6-25 m liquids
0.6-10 m solids
FE= Flange DN 150
AE= ANSI-Flange 6“
NUS-400P
pluggable programming unit with LCD-Display
NUS-4
NUS-4 K05/0216 Seite 39
15. Dimensions
NUS-4x04 NUS-4x06
~89
1 1/2" BSP
oder NPT
BSP Länge 15
NPT Länge 22
2 x M20x1,5
2 x 1/2" NPT
~60
97,5
42
2 x M20x1,5
2 x 1/2" NPT
~60
~89
97,5
2" BSP
oder NP
T
BSP Länge 15
NPT Länge 22
53
NUS-4x08 NUS-4x10
2 x M20x1,5
2 x 1/2" NPT
~
89
97,5
2" BSP
oder NPT
BSP Länge 15
NPT Länge 22
~80
53
NUS-4x15 NUS-4x25
NUS-4
Seite 40 NUS-4 K05/0216
16. EU Declaration of Conformance
We, KOBOLD Messring GmbH, Hofheim-Ts, Germany, declare under our sole
responsibility that the product:
Ultrasonic Level Meter Model: NUS-...
to which this declaration relates is in conformity with the standards noted below:
EN 61010-1:2011 Safety requirements for electrical equipment for
measurement, control and laboratory use - Part 1: General requirements
EN 61326-1:2013 Electrical equipment for measurement, control and laboratory
use - EMC requirements - Part 1: General requirements
EN 61326-2-3:2013 Electrical equipment for measurement, control and laboratory
use - EMC requirements - Part 2-3: Particular requirements - Test configuration,
operational conditions and performance criteria for transducers with integrated or
remote signal conditioning
Also the following EC guidelines are fulfilled:
2014/30/EU EMC Directive
2014/35/EU Low Voltage Directive
2011/65/EU RoHS (category 9)
Hofheim, 12. July 2016
H. Peters M. Wenzel
General Manager Proxy Holder
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