NIVELCO EasyTREK SCD-300 Series Assembly instructions

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INSTALLATION
and
PROGRAMMING MANUAL
1st edition
HiTECH/NIVELCO Process Control Co.
301Oxford Valley Road, Bldg 505, Yardley, PA 19067 Tel: [phone] ♦Fax: [phone]
E-mail:[email protected] ♦www.hitechtech.com

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PRINCIPLES OF ULTRASONIC LEVEL MEASUREMENT
Max. measuring distance of the device (X )
DEFAULT value of: P04=X
Max. measuring range of the device Min. meas. distance (Xm)
DEFAULT value of: P05=Xm
Max. measuring distance of the
application (H)
Programmed value of: P04=H
Programmed measurement range
Close end blocking (XB)
Progr. value of: P05=XB>Xm
LEV= level calculated H-DIST)(
VOL= volume (calculated from LEV)
DEFAULT value of: P06=0 Far end blocking
DIST
Angle of repose:
DIST=distance (measured)
Displayable range
M
M

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CONTENTS
1. INTRODUCTION .............................................................................5
2. TECHNICAL DATA.........................................................................7
2.1.GENERAL DATA...........................................................................7
2.2.SPECIAL DATA.............................................................................7
2.3.ACCESSORIES.............................................................................8
2.4.ORDER CODES............................................................................8
2.5.DIMENSIONS...............................................................................9
3. INSTALLATION.............................................................................10
4. WIRING..........................................................................................12
4.1.WIRING CONDITIONS..................................................................12
4.2.CONNECTION CABLE EXTENSION ................................................12
5. PUTTING INTO OPERATION, ADJUSTING, PROGRAMMING ..14
5.1.PUTTING INTO OPERATION .........................................................14
5.1.1. Status indication signals in measuring mode..................15
5.2.SAFETY REGULATIONS OF THE EX APPROVED UNITS....................15
5.3.PROGRAMMING.........................................................................15
5.4.PARAMETERS –DESCRIPTION AND PROGRAMMING......................16
5.4.1. Measurement Configuration............................................16
5.4.2. Current value...................................................................21
5.4.3. Relay output....................................................................22
5.4.4. Measurement optimalization...........................................23
5.4.5. Volume measurement.....................................................28
5.4.6. Linearisation....................................................................29
5.4.7. Informational parameters................................................30
5.4.8. Test parameters..............................................................31
5.4.9. Error codes......................................................................32
6. MAINTENANCE, REPAIR............................................................ 33
7. STORAGE CONDITIONS............................................................. 33
8. PARAMETER TABLE................................................................... 34

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Thank you for choosing a HiTECH/ NIVELCO instrument.
We are sure that you will be satisfied throughout its use.
1. INTRODUCTION
APPLICATION
The EASYTREK SCD - 300 series compact ultrasonic transmitters from HiTECH/NIVELCO are designed to measure the level of free flowing solids, granules and
powders.
The unit does not touch the material to be measured and does not include any moving parts. Thus, it is not exposed to mechanical loading, no abrasive effect is
expected and regular maintenance is not required.
A Total beam angle of 5°at –3 dB is a feature of all HiTECH/NIVELCO’s ultrasonic sensors designed for the level measurement of free flowing solids.
This uniquely narrow beam angle ensures reliable measurement in narrow silos with uneven side walls or sometimes even in the presence of dusting.
Furthermore, as a result of the narrow beam angle – the emitted ultrasonic signals have an outstanding focusing – a sufficient signal penetration through dust is
ensured.
PRINCIPLE OF OPERATION
The ultrasonic level metering technology is based on the principle of measuring
the time required for the ultrasound pulses to make a round trip from the sensor to
the level to be measured and back.
The sensor emits an ultrasonic pulse train and receives the echoes reflected. The
intelligent electronic device processes the received signals by selecting the
echoes reflected from the surface and calculates the distance from the time o
f
flight between the sensor and the surface of the medium. This is the basis for all
other output signals (level or volume) of the EasyTREK! For measuring the level o
f
the medium the greatest distance of the application (H) has to be programmed.
rr
D
XD
5m 0,7 m
10m 1,2 m
20m 2m
30m 3m
40m 3,8 m
50m 4,7 m
X
Diameters corresponding to the
5° beam angle
X = 16,5 ft. D = 28.0”
X = 33.0 ft. D = 4.0 ft.
X = 65.0 ft. D = 7.0 ft.
X = 99.0 ft. D = 9.9 ft.
X = 131.0 ft. D = 13.0 ft.
X = 197.0 ft. D = 15.0 ft.
Minimum measuring distance (Xm) is the construction defined smallest distance within which measurement is not possible (Dead Band; see 5.3. Parameters P05).
In special applications this range should be extended with programming (close end blocking)
Maximum measuring distance (XM): is the construction defined greatest distance, which can be measured by the unit under ideal conditions. No measurement is
possible over this distance i.e. maximum distance of the application H must not be greater than XM. Under unfavourable circumstances such as bad reflection or heavy
dusting of the material the measuring capability may be reduced up to the half of the unit’s best performance.

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THE FOLLOWING TYPES OF APPLICATIONS ARE POSSIBLE DEPENDING ON THE COMMUNICATION AND WHAT THE OUTPUT SIGNAL IS USED FOR:
1. Using the unit as a three - or four -wire current transmitter.
Normally, we use the analogue (4…20 mA) output signal of the EasyTREK. The application parameters of the device are set through HART communication at
installation (right after installation or in a laboratory, prior to installation). In this case the short address of the device should stay the factory default: P19 = 0.
2. Using both, current transmission and digital (HART) signal transfer in single transmitter systems.
Digital signal transfer is also used beside the standard utilisation of the output current of the EasyTREK. In this case, there can be one or more devices in the
current loop that use analogue signals (with their total resistance being Rt= 250 … 600 Ω) and one HART master device.
The short address of the EasyTREK should stay the factory default: P19 = 0. This application can be achieved with using a PE-10 or a PR-1type
MultiCONT unit as the HART master which ensures the power supply of the EasyTREK too.
3. Simultaneous control of several EasyTREK transmitters with the help of a MultiCONT.
In this case all of the EasyTREK s keep the connection with the MultiCONT through HART communication only.
This means that the measurement values are collected in cycles, and that the modifications of the transmitter settings are arbitrary.
The short addresses of the units are P19 = 1 ... 15. All types of setting and programming tasks can be done through a MultiCONT.

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2. TECHNICAL DATA
2.1.GENERAL DATA
Type EasyTREK SCD– 3 - 4 EasyTREK SCD– 3 - 8 Ex*
Housing material PP+ Aluminium Aluminium
Total beam angle (-3dB) 5°
Process temperature -22ºF (–30°C) ... + 140ºF (60°C) - 4ºF (–20°C) ... +140ºF (60°C)
Process pressure (absolute) 0,07 ... 0,11 MPa (0,7 … 1,1 bar) 10 PSI – 16 PSI
Power supply / consumption 11,4 … 40 V DC / 3,6 W, 11,4 … 28 V AC / 4 VA
Analogue 4 … 20 mA, Rtmax = 600 ohm, Galvanic isolation; protection against surge transients
Digital communication HART
Output Relay SPST ; 48 V AC / 5A; A12
Accuracy ±( 0,2% of the measured distance + 0,1% of the range)
Resolution 0.39” (10mm)
Damping 3 … 1000 s
Electric connection 6 x 2,5 mm2∅7,5 mm shielded cable ; standard length 9.8 ft (3 m) ; (to order up to 98 ft. (30m)
Electric protection Class III
Ingress protection IP65
Ex marking* n.a. ATEX II 1D IP 65 T 130 °C
*Pending
2.2.SPECIAL DATA
Type SCD-34- 4
SCD-34- 8 Ex* SCD-33- 4 SCD-33- 8 Ex* SCD-31- 4 SCD-31- 8 Ex*
Maximum measuring distance** (XM) 49 ft. (15 m) 98 FT. (30 m) 197’ (60 m)
Minimum measuring distance** (Xm) 1.6 ft. (0,5 m) 2 ft. (0,6 m) 3.28 FT. (1 m)
Ultrasound frequency 40 kHz 30 kHz 15 kHz
Sensor face PVC foam
Mass 7.7 lbs. (~ 3.5 kg) 7.7 lbs. (~ 3.5 kg) 14.0 lbs. (~ 6.5 kg)
*Under optimal circumstances of reflection and stabilised sensor temperature

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2.3.ACCESSORIES
•Installation and Programming Manual
•Guaranty Certificate
•Manufacturer’s Declaration
•EView Light configuration software and description on CD
ACCESSORIES TO BE ORDERED
•Split flange (order code: SFA – 35)
•EView configuration software CD
•HART modem
2.4.ORDER CODES
Eas
y
TREK S C D – 3 – *
Range Code Mounting Code Output / Ex Code
197 ft (60 m) 1 1" BSP 0 4 … 20 mA+HART+Relay 4
99 ft (30 m) 3 Aiming device J 4 … 20 mA+HART+Relay/Ex 8
49 ft. (15 m) 4 RS 485+ Relay B
RS 485+ Relay / Ex F
*The order code of an Ex version should end in “Ex”

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2.5.DIMENSIONS
SCD-310-_ SCD-310-_ Ex SCD-330-_
SCD-340-_ SCD-330-_ Ex SCD-340-_ Ex
SCD-31J-_ SCD-31J-_ Ex SCD-33J-_ SCD-33J-_ Ex
SCD-34J-_ SCD-34J-_ Ex
Ball-joint Housing
(view from above)

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3. INSTALLATION
POSITIONING
Selecting optimal location for the transmitter various considerations should be made.
If the measured material is granule (material size > 5 mm) and the tank roof is dome shaped or conical, do not
install the transmitter in the centre of the tank/silo. In general the transmitter can be installed on the radius
r= (0,3 … 0,5) R.
Avoid that the 5° conical beam angle of the transmitter contact the tank/silo wall. In case the transmitter is
mounted close to the wall, it should be tilted (See section “Aiming”). Protect the transmitter electronics from
overheating due to direct sunshine. The same way no disturbing objects such as ladder, grid, thermometer, etc
should intrude into the beam cone. Heavy air movement can make measurement more difficult or even unable.
Device should be protected against direct sunshine no to let its temperature increase into excessive range.
r
R
GRAVITY FILLING
Select a location that is as
far away from the filling
point(s) as possible.
PNEUMATIC FILLING
Select a location where the speed of the in-flowing
material is the smallest.
Suggested location (view from above)
40m 3,8 m
50m 4,7 m
MOUNTING (see illustration of mounting options on the next page)
The EasyTREK consists of a sensor that is attached to the aiming arm (a pipe with a ball-joint housing incorporating a ball joint) that is attached to the housing of the
electronics. It is recommended to mount the transmitter on the roof of the tank/silo using a flange (see drawing above). The Ball-joint housing has a screw-hole
diameter of 125 mm for fixing it. For easy installation we recommend using our special flange with a split insertion, available in four sizes of DN125/150/200/300 (to be
ordered separately). Removing the split insertion, the flange is to be put around the aiming arm and the ball-joint housing is to be fixed to the split flange. It is essential
to use the washers and the bolts (4 pcs each) delivered with the split flange. The ball-joint will be pressed to the housing by a spring allowing adjustment/aiming.
The 4 pcs of M12 bolts have to be tightened only after completing the adjustments/aiming.

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When the entire tilting range of the aiming arm is required, the thickness of the roof can not exceed the values specified below.
The EasyTREK can also be mounted on existing (manhole) covers, access lids or for instance on a steel structure lowered into a larger (ex.: 0.5 x 0.5 m) opening on
the roof. This solution is to be used with roofs thicker than 350 …380 mm.
Diameter of the
Opening
D
Maximum Thickness
of the Roof
V
160 mm 110 mm
190 mm 150 mm
230 mm 200 mm
300 mm 280 mm
340 mm 300 mm
Illustration of mounting

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4. WIRING
4.1.WIRING CONDITIONS
•The transmitter is SELV supplied. In the case of DC supply the connection is
independent of polarity.
•Only SELV circuits can be switched on to the relay output.
•The house must be grounded to have noise protection; it should be
grounded to the equipotential bonding net.
•3-wire DC powered devices can be created by connecting one of the power
supply wires to the white wire of the current output (GND). In this case the
current output becomes galvanically non-isolated.
•The units and the cables should be arranged so that the fastening outside
the device relieves the end of the cable of any traction.
4.2.CONNECTION CABLE EXTENSION
•It is advised to use a terminal box when cable extension is necessary.
The shielding should be connected to the shielding of the extension cable and
it should be grounded at the processing unit.
I
OUT
+ HART
Green
Brown
Grey
White
Pink
Yellow
Grounding
Supply
Housing
Rela
y
output
Colour codes of the outputs

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Trial and laboratory programming of the SCD-300 transmitters
mA
Output current test
SELV
supply
Grey
EasyTREK
White
Brown
Green
Multiple SCD-300 transmitters connected to a MultiCONT process control unit
Power is supplied from a common external source, the relays are not used.
24 V AC/DC
26 27 28
Brown
Grey White
Green
Shielding
MultiCONT
SCD-3_ _-4
DEVICES
SCD-3_ _-4 SCD-3_ _-4
SCD-3_ _-4
HART communication and power supply of one SCD-300 transmitter from the
MultiCONT process control unit.

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5. PUTTING INTO OPERATION, ADJUSTING, PROGRAMMING
5.1.PUTTING INTO OPERATION
After switching on the correctly wired unit the transducer begins to click audibly. In about 20 … 50 s the ECHO LED goes on and a signal between 4 ... 20 mA
appears on the current output. When first powering the unit, it measures with the standard manufacturer’s settings (see some of the most important parameters
below).
Default parameters
All the transducers get the same factory default parameters that can also be reset later if needed. Some of the most important parameters of the EasyTREK
SCD-300 series can be found below.
⇒Measurement mode: level (LEV),
⇒4 mA is assigned to the XMmaximum measuring distance (minimum level)
⇒20 mA is assigned to the Xmminimum measuring distance (maximum level)
⇒Current output holds last value in case of error
⇒Damping: 300 s
All the other measurement values are set to fit the values suitable for standard tasks. The functions used in special cases are switched off.
AIMING THE SENSORS
When the material to be measured is being filled or emptied, because of the formation of an angle of repose, the vertically installed transmitter will experience a weak
signal. This can be eliminated in most cases by tilting the unit, so the aiming device is a very important part of these transmitters. The proper aiming can be set and
checked while the transmitter is being used, desirably when the silo / tank is almost empty. Usually it is best that the transmitter points to the middle of the bottom of
the silo/tank.
In cases when the silo is narrow, and the height / diameter value equals to or is more than 5, tilting is
usually not necessary. Aiming should also be checked when the silo / tank is full, because the echo can
be adversely weak even when coming from a nearby surface. This usually happens when the angle of
repose is big. In this case an optimal solution must be found in which the echo coming from any
distance is acceptable. The SERVICE PARAMETERS that can be reached during programming provide
help for set-up. That means that the aiming adjustment and the programming should be done at the
same time.

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5.1.1.STATUS INDICATION SIGNALS IN MEASURING MODE
HART respond signals LED status signals on the unit
The properly installed device with factory default settings gives the following
responses to the COM3 universal HART command:
primary value Level
secondary value Level
tertiary value Distance
quaternary value Temperature (See P01 programming).
Green LED COM
Lights up during HART programming.
Red LED ECHO
Lights up when the device gets proper echoes.
5.2.SAFETY REGULATIONS OF THE EX APPROVED UNITS
Ex certified devices are approved for Zone 20 and Zone 21 areas.
Transmitters must not be installed in the dust path of the pneumatic filling!
Neither the device, nor any part of it should be used as a flame-proof barrier of a
Zone 20 area.
The cable outside the unit should be fixed so that it is tension-free.
The terminal box should be selected in accordance with the electrical class of the
area.
5.3.PROGRAMMING
HART interface of the EasyTREK enables full access and programming of the complete parameter set.
Parameters can be accessed by two ways:
- with a HART modem and EView or Eview light configuration software run on a PC
- by the HiTECH/NIVELCO made MultiCONT multichannel controller
This instruction describes parameters and features behind them but does not deal with technical details for their selection and editing of their values. Compact Disk
attached to the transmitter contains detailed information on the Eview configuration software (to install on PC) and its description. Programming by the MultiCONT can
be taken from its Installation and Programming Manual.
Continuous measuring is going on during programming in accordance with the last programmed parameter set. This way the analog output signal
(4-20mA) continuously represents the actual value. The digital (HART) communication depends on the communication software. The new, modified
parameter set will be valid after returning to measurement mode. The device changes back to measurement mode automatically in 1 minute after
programming through HART communication has been finished or discontinued.

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5.4.PARAMETERS –DESCRIPTION AND PROGRAMMING
5.4.1.MEASUREMENT CONFIGURATION
P00: - c b a Application/Engineering Units
ATTENTION!
Programming of this parameter will result in loading the factory default with the corresponding engineering units.
a Operating (measurement) mode
1 Free flowing solids level measurement
Engineering units (according to “c”)
( according to „c”)
b Metric US
0 m ft
1 cm inch
c Calculation system
0 Metric
1 US
FACTORY DEFAULT: 001
DEVICE CAN BE OPERATED WITH TWO DIFFERENT ENGINEERING UNIT SYSTEMS, BUT FOR THE SAKE OF EASY OVERVIEW ONLY THE
METRIC SYSTEM WILL BE USED!

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P01: - - b a Measurement Mode
Values transmitted by HART protocol, current output and the switching points of the relays will be interpreted into the engineering units of the
(measured or calculated) process value corresponding to the programmed measurement mode. On the other hand, the higher the “a” of the
programmed parameter value the more (measured or calculated) process values can be transmitted through HART (e.g. if P01=0 only the Distance, if
P01=4 Distance, Level and Volume; Exception: P01=2 or 4.)
a MEASUREMENT MODE TRANSMITTED
PROCESS VARIABLES
PRIMARY VARIABLES
TRANSMITTED THROUGH
HART
OTHER VARIABLES TRANSMITTED
THROUGH HART
0 Distance Distance DIST Secondary: LEV
1 Level LEV Tertiary: DIST
2 Level in percent
Level LEV% Quaternary: Temp
3 Volume VOL
4 Volume in percent
Volume VOL%
LEV %
0100 [%]
LEV
DIST
Factory settings
H
P10
P11
LEV
Xm
V
OL %
0100[%]
P10
P11
V
OL
V
OL
LEV
Factor
y
settin
g
s

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P02: - c b a Calculation units
a Temperature
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)
Volume Weight (set also P32
b Metric US Metric US
0 m3ft3tone lb (pound)
1 litre gallon tonne tonne
c The value of character chas no significance at devices for solids
FACTORY DEFAULT: 000
P03: - - - a Values displayed – Rounding (Not used at EasyTREK)
P04: - - - - Maximum measuring distance (H and XM)
Maximum measuring distance is the greatest distance (H) between the sensor surface and the farthest surface to be measured in the application.
Factory default of this parameter is the maximum distance (XM) that can be measured by the unit. (See table below) During programming P04 should
be set for the maximum distance (H) to be measured, whereas H ≤XM.
EasyTREK
Level transmitters for liquids Maximum measuring distance
(XM) [m]
SD – 34– 15
SD – 33– 30
SD – 31– 60
Keep in mind that LEVEL (as the result of the measurement) = P04 (programmed)
– DISTANCE (measured by the device)
Since the accuracy of level (and all further calculated) value depends on the
accuracy of the max measuring distance of the application which is the
distance between the sensor face and the tank / silo bottom.
To obtain the best accuracy for liquid level measurement, measure with
EasyTREK this distance in the empty tank.
FACTORY DEFAULT: distance of XMas per table above

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P05: - - - - Minimum measuring distance (Close-end blocking)
Basic feature of the ultrasound level meters is their not being able to measure next to the sensor surface. Within this range the measurement can not be
interpreted, thus it should be avoided that material level get into this range. By entering a value, higher than the factory default, the minimum measuring
range will be extended and fixed to that value. Manual close-end-blocking would 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.
Automatic Close-end-blocking (Automatic Dead Band control)
By using the factory default value, the unit will automatically be adjusted to the smallest possible dead band (Xm). In ideal cases this can be smaller and
in disadvantageous mountings greater than the dead band.
Manual close-end-blocking P05 = XB> Xm
Entering greater value in P05 than Xm will represent the extension of the close end blocking.
EASYTREK
Level transmitters
for liquids
Minimum measuring
distance
(Xm) [m]
SD – 34– 0,5
SD – 33– 0,6
SD – 31– 1,0
FACTORY DEFAULT: automatic close end blocking (Xmas per the table)

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P06: - - - - Far-end blocking
Far-end blocking is the range below the level
set in parameter P06. Far-end blocking can
be used to avoid disturbing effects of stirrers
or heaters at the bottom of the tanks.
When the unit detects echoes in this range it
gives special signals.
When level sinks below far-end blocking:
- Message of "Sub 0" appears in EView (in
level and volume measurement mode)
- Current output holds value corresponding to
far-end blocking distance
“SUB 0” display
below this level
P06
Far-end blocking
LEV
04mA 20mA
DIST
DIST
H
I
out
LEV=level
VOL=volume
When level rises above far-end blocking:
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 value of far-end blocking.
FACTORY DEFAULT: 0