NIVELCO EasyTREK SCD-34 4 Series Assembly instructions

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CONTENTS
1.INTRODUCTION ................................................................................... 5
2.TECHICAL DATA.................................................................................. 6
2.1.GENERAL DATA........................................................................................... 6
2.2.SPECIAL DATA ............................................................................................ 7
2.3.EX INFORMATION......................................................................................... 7
2.3.1.ATEX certificate No.: BKI16ATEX0020X/1................................. 7
2.3.2.EACEx certificate No.: RU C-HU. IM43.B.01471 ....................... 7
2.4.ACCESSORIES............................................................................................. 7
2.5.ORDER CODES ............................................................................................ 8
2.6.DIMENSIONS................................................................................................ 9
3.INSTALLATION .................................................................................. 10
4.WIRING ............................................................................................... 11
4.1.WIRING CONDITIONS.................................................................................. 11
4.2.CONNECTION CABLE EXTENSION ............................................................... 11
5.PUTTING INTO OPERATION, ADJUSTING, PROGRAMMING........ 13
5.1.PUTTING INTO OPERATION ......................................................................... 13
5.1.1.Status indication signals in measuring mode ........................... 14
5.2.SPECIAL CONDITIONS OF EX USE .............................................................. 14
5.3.PROGRAMMING ......................................................................................... 14
5.4.PARAMETERS –DESCRIPTION AND PROGRAMMING..................................... 15
5.4.1.Measurement Configuration...................................................... 15
5.4.2.Current value............................................................................. 20
5.4.3.Relay output .............................................................................. 21
5.4.4.Measurement optimalization ..................................................... 22
5.4.5.Volume measurement............................................................... 26
5.4.6.Linearisation.............................................................................. 27
5.4.7.Informational parameters .......................................................... 28
5.4.8.Test parameters ........................................................................ 29
5.4.9.Error codes................................................................................ 30
6.MAINTENANCE, REPAIR................................................................... 30
7.STORAGE CONDITIONS ................................................................... 30
8.PARAMETER TABLE......................................................................... 31

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CERTIFICATES: Reference document number
BKI ATEX,Certificate No.: BKI16ATEX0020X/1 scd3404m060bp_07
EAC, Certificate No: RU C-HU. IM43.B.01471 scd3404o0600p_02

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Thank you for choosing a NIVELCO instrument.
1. INTRODUCTION
The EasyTREK SCD–300 series compact ultrasonic transmitters from 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 beam angle of 5at –3 dB is a feature of all 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. Modifying of the factory default settings of the level transmitter is possible only via HART communication.
OPERATION PRINCIPLE
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 of 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 of the medium the greatest distance of the application (H)
has to be programmed.
Diameters corresponding to the
5° beam angle.
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 unfavorable 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. 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. 2.Using both, current transmission and digital (HART) signal transfer in single transmitter systems.
Digital signal transfer is also used beside the standard utilization 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 ) 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 MultiCONT unit as the HART
master which ensures the power supply of the EasyTREK too.
3. 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.
2. TECHICAL DATA
2.1. General data
Type SCD–3–
Transducer material Closed cell PVC foam sensor face
PP and Aluminum transducer housing and fitting
Beam angle 5°
Process temperature
–
30…+60 °C (−22…+140 °F)
Process pressure (absolute) 0.7…1.1 bar (10…16 psi) Pabsolute and ± 0.1 bar (±1.45 psig)
difference between ambient and tank/silo pressure
Power supply / consumption 11.4…40 V DC / 4.1 W o
r
11.4…28 V AC (50/60Hz) / 4,6 V
A
Accuracy* (0.2 % of the measured distance + 0.1% of the measurement range)
Resolution 10 mm (0.4 inch)
Output
Analog 4…20 mA, Rtmax = 600 Ω, galvanic isolation, protection against surge transients
If no echo: continuous 3.6 mA or 22 mA (selectable with programming)
Relay Relay (SPST), 48V AC / 5 A
Digital communication HART®standard on the current output
Damping time 3…1000 s (selectable with programming) Default value: 300 s
Electrical connection 7x0.5 mm2(AWG20) shielded cable 7.5 mm (Ø0.3 inch) standard length: 3 m (16.5 ft) (available to order up to 30 m [100 ft])
Electrical protection Class III
Ingress protection IP 65
* Under optimal conditions and constant transducer temperature.

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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 XM15 m (50 ft) 30 m (100 ft) 60 m (200 ft)
Minimum measuring distance Xm0.6 m (2 ft) 0.6 m (2 ft) 1 m (3.3 ft)
Ultrasound frequency 40 kHz 30 kHz 15 kHz
Weight 3.5 kg (7.7 lb) 3.5 kg (7.7 lb) 6.5 kg (14.33 lb)
2.3. Ex information
2.3.1. ATEX certificate No.: BKI16ATEX0020X/1
Type SCD–3–8 Ex
Ex marking (ATEX) II 1 D Ex ma ta IIIC T85°C…T130°C Da
Transducer material Closed cell PVC foam sensor face, Aluminum transducer housing and fitting
Process temperature –30…+60 °C (−22…+140 °F)
Max. surface temperature +130 °C (266 °F)
Output
Analog 4…20 mA, Rtmax = 600 Ω, galvanic isolation, protection against surge transients
If no echo: continuous 3.6 mA or 22 mA (selectable with programming)
Relay Electronic switch: SPST 48 V AC 50 V DC / 1 A
Digital communication HART®standard on the current output
2.3.2. EACEx certificate No.: RU C-HU. IM43.B.01471
Type SCD–3–8 Ex
Ex marking (EACEx) Ex ma ta IIIC T85°C…T130°C Da
Transducer material Closed cell PVC foam sensor face, Aluminum transducer housing and fitting
Process temperature –30…+60 °C (−22…+140 °F)
Max. surface temperature +130 °C (266 °F)
Output
Analog 4…20 mA, Rtmax = 600 Ω, galvanic isolation, protection against surge transients
If no echo: continuous 3.6 mA or 22 mA (selectable with programming)
Relay Electronic switch: SPST 48 V AC 50 V DC / 1 A
Digital communication HART®standard on the current output
2.4. Accessories
-Installation and Programming Manual,
-Warranty Card, ACCESSORIES (SOLD SEPARATELY)
-EU Declaration of Conformity - Split flange (order code: SFA – 35)

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2.5. Order codes
EasyTREK S C D – 3 – *
Range / Frequency Code Mounting Code Output / Certificates Code
1…60 m (15 kHz) 1 1" BSP thread 0 4…20 mA + HART+ Relay 4
0.6…30 m (30 kHz) 3
A
iming device J 4…20 mA + HART+ SSR / Ex ma ta IIIC 8
0.6…15 m (40 kHz) 4 * Order codes of Ex versions end in ’Ex’

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2.6. Dimensions
SCD–310–SCD–310–Ex SCD–330–SCD–340–SCD–330–8 Ex SCD–340–8 Ex
SAA–102 SCD–31J–SCD–31J–8 Ex SCD–33J–
SCD–34J–
SCD–33J–8 Ex
SCD–34J–8 Ex
Ball-joint Housing
(view from above)

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3. INSTALLATION
PLACEMENT
To find the ideal position for the location of the EasyTREK level transmitter various considerations should be made. The
transmitter should not be installed in the center of the tank/silo when the tank roof is dome shaped or conical. The ideal
position for the EasyTREK is on the r = (0.3…0.5) R (in case of cylindrical tank).
Avoid that the 5° conical beam angle of the transmitter contact the tank/silo wall. This case the transmitter is mounted too
close to the wall, therefore it should be tilted (See section “Aiming”).
To avoid overheating the instrument should be protected against direct sunshine.
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.
Ex type units are not allowed to be installed
in the dust path of the pneumatic filling!
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 integrated
level transmitter. 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 Ø 125 mm (4.9 inches) 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 (see Figure 1.). The maximum torque for tightening the bolts is 3.5 Nm.
When the entire tilting range of the aiming arm is required, the thickness of the roof cannot 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 (e.g.: 0.5 x 0.5 m
[19,7x19,7 inch]) opening on the roof. This solution is to be used with roofs thicker than 350…380 mm (13.8…14.9 inch).

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Figure 1. Illustration of mounting
DIAMETER OF THE OPENING
D (mm
/
inch)
MAXIMUM THICKNESS OF THE
ROOF V (mm
/
inch)
160 / 6.3 110 / 4.3
190 / 7.5 150 / 5.9
230 / 9 200 / 7.9
300 / 11.8 280 / 11
340 / 13.4 300 / 11.8
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 or the solid state 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).
–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
–The shielding should be connected to the shielding of the extension cable and it should be
grounded at the processing unit.
Figure 2.
Color codes of the outputs

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Multiple SCD–300 transmitters connected to a MultiCONT process
control unit. Power is supplied from a common external source; the relays
are not used.
HART communication and power supply of one SCD-300 transmitter from the MultiCONT process
control unit.
Trial and laboratory programming of the SCD
–
300 transmitters.

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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),
–Zero level is assigned to the maximum measuring distance (XM).
–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. The strength of the
echoes can be checked in the Echo Map window of the EView software or
in the Echo menu of the MultiCONT device.

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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. Special Conditions of Ex use
–The apparatus nor any part of it is not suitable as a fire resistant barrier for the Zone 20 area. The equipment is not allowed to be installed in the dust path of
the pneumatic filling!
–The instrument should be grounded by all its grounding screws to the EP system in order to avoid electrostatic charges.
–For connecting the cable of the level transmitter, a suitable terminal box should be selected in accordance to the electrical classification of the area and the
cable outside the unit should be fixed so that it is tension-free.
–As a result of the mounting arrangement of the unit the ambient temperature is equal to the process temperature.
–The current output should be connected to a galvanic isolator.
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 the aid of EView configuration software run on PC
By the 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 analogue output signal
(4…20 mA) 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 FACTORY DEFAULT: 001
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
b ENGINEERING UNITS (ACCORDING TO „C”)
Metric US
0 m ft
1 cm Inch
c CALCULATION SYSTEM
0 Metric
1 US
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: - - 1 a Measurement Mode FACTORY DEFAULT: 11
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.) (P10, P11)
a MEASUREMENT
MODE
TRANSMITTED PROCESS
VARIABLES
PRIMARY VARIABLES
TRANSMITTED THROUGH HART
OTHER VARIABLES TRANSMITTED
THROUGH HART
0 Distance Distance DIST Secondary: LEV
Tertiary: DIST
Quaternary: Temp
1 Level
Level LEV
2 Level in percent LEV%
3 Volume
Volume VOL
4 Volume in
percent
VOL%

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P02: - c b a Calculation units FACTORY DEFAULT: 000
a TEMPERATURE
0 °C
1 °F
b Volume Weight (set also P32) 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)
Metric US Metric US
0 m3ft3ton lb (pound)
1 liter gallon ton ton
c The value of character chas no significance at devices for solids
P03: - - - a Values displayed – Rounding (Not used at EasyTREK)
P04 - - - - Maximum measuring distance (H) FACTORY DEFAULT: distance of XM as per table above
This parameter must always be programmed, except for distance measurement!
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 MAXIMUM MEASURING DISTANCE
(XM) m / ft
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.
SCD – 34– 15 / 50
SCD – 33– 30 / 100
SCD – 31– 60 / 200

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P05: - - - - Minimum measuring distance (Close-end blocking) FACTORY DEFAULT: automatic close end blocking (Xm as per the table)
Basic feature of the ultrasound level meters is they’re not being able to measure next to the sensor surface. Within this range the measurement
cannot 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) P05=Xm
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 TRANSMITTER FOR SOLIDS
MINIMUM MEASURING DISTANCE
(Xm) m / ft
SCD – 34– 0.6 / 2
SCD – 33– 0.6 / 2
SCD – 31– 1 / 3.3

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P06: - - - - Far-end blocking FACTORY DEFAULT: 0
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
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.

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5.4.2. Current value
P08: - - - - Fixed output current FACTORY DEFAULT: 0
With this step the output current can be set as a fix value, selected between 3.8 mA and 20.5 mA. Output current will be fixed until the value of
P08 is programmed back to 0 again.
P10: - - - - Value (of distance, level or volume) assigned to 4 mA current output FACTORY DEFAULT: 0
P11: - - - - Value (of distance, level or volume) assigned to 20 mA current output FACTORY DEFAULT: XM – Xm
(See P04 and P05)
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 (m3, ft3).
Assignments 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 1m (3.3 ft) assigned to 4 mA and lev 10 m (33 ft) assigned to 20 mA represents direct proportion and
lev 1 m (3.3 ft) assigned to 20 mA and lev 10 m (33 ft) assigned to 4 mA represents inverse proportion.
P12: - - - a Error indication by the current output Factory Default: 0
In case of error the EasyTREK will provide one of the current outputs below for the time the failure prevails.
aOUTPUT CURRENT AT ERROR INDICATION
0HOLD last value
13.6 mA
2 22 mA