FTS Radar Stage Sensor User manual

EXTREME ENVIRONMENTS. EXTREMELY RELIABLE.
Radar Stage Sensor (RSS) Operating Manual
Continuous Level Measurement
For all variants of SDI-RADAR/SDI-RADAR-64
1.800.548.4264 | www.ftsinc.com
700-RSS-Man Rev 13 15 Jun 2021

Contact Information
Canadian Headquarters:
1065 Henry Eng Place
Victoria, BC | V9B 6B2 | Canada
www.ftsinc.com
Toll-free: 1.800.548.4264
Local: 250.478.5561
Technical support portal: http://support.ftsinc.com
Email: [e-mail]

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Contents
1.1 FUNCTION................................................................................................................................................... 1
1.2 TARGET GROUP.......................................................................................................................................... 1
1.3 REFERENCES ............................................................................................................................................... 1
2.1 AUTHORIZED PERSONNEL........................................................................................................................ 2
2.2 APPROPRIATE USE ..................................................................................................................................... 2
2.3 GENERAL SAFETY INSTRUCTIONS............................................................................................................ 2
2.3.1 ELECTROMAGNETIC COMPATABILITY............................................................................................ 3
2.4 RADIO LICENSE FOR U.S./CANADA .......................................................................................................... 3
2.5 INSTALLATION LIMITATIONS-CANADA.................................................................................................... 3
2.5.1 OPERATING NEAR PENTICTON OR IN THE OKANAGON VALLEY, B.C......................................... 4
3.1 FUNCTIONAL PRINCIPLE ........................................................................................................................... 6
3.1.1 DEFAULT SETTINGS .......................................................................................................................... 6
3.1.2 IMPORTANT: ABOUT THE DEFAULT HART OPERATION MODE.................................................. 6
3.1.3 POWER MODES................................................................................................................................. 7
3.1.4 SCOPE OF DELIVERY......................................................................................................................... 7
4.1 SDI-12 MILITARY BAYONET CONNECTOR ............................................................................................... 8
4.2 SDI-12 CONNECTION................................................................................................................................. 9
4.3 4-20 mA OUTPUT OPTION CONNECTIONS........................................................................................... 10
5.1 GENERAL................................................................................................................................................... 12
5.1.1 PROTECTION AGAINST MOISTURE............................................................................................... 12
5.2 INSTALLATION POSITION........................................................................................................................ 12
5.2.1 MOUNTING DISTANCE................................................................................................................... 12
5.2.2 POLARIZATION AND SENSOR ORIENTATION.............................................................................. 12
5.2.3 INSTALLATION OBSTRUCTIONS.................................................................................................... 14
5.3 ATTACHING THE MOUNTING STRAP ..................................................................................................... 14
5.4 MOUNTING INSTRUCTIONS ................................................................................................................... 15

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6.1 SETTING UP WITH THE FTS AXIOM DATALOGGERS............................................................................. 16
6.1.1 SETTING UP USING THE RADAR EXTENSION............................................................................... 17
6.1.2 SETTING UP USING THE SDI GENERIC EXTENSION .................................................................... 20
MAPPING THE RADAR SENSOR TO THE DATALOGGER.............................................................. 22
6.2 SETTING UP WITH NON–FTS DATA LOGGERS ...................................................................................... 23
8.1 USING SDI-12 COMMANDS WITH AXIOM DATALOGGERS.................................................................. 25
8.2 SDI-12 notation ........................................................................................................................................ 26
8.3 GENERAL SDI-12 COMMANDS................................................................................................................ 26
8.4 STANDARD MEASUREMENT COMMANDS ............................................................................................ 27
8.4.1 COMPARISON OF THE M AND M1 COMMANDS......................................................................... 29
8.4.2 COMPARISON OF POWER MODES WITH NOAA COMMANDS (M3, M4, M5)........................... 29
8.5 X COMMANDS .......................................................................................................................................... 30
8.5.1 REQUIRED FORMATTING ELEMENTS ........................................................................................... 30
8.5.2 X COMMANDS LIST......................................................................................................................... 31
9.1 GENERAL................................................................................................................................................... 34
9.2 ATTACHING THE MODULE...................................................................................................................... 34
9.3 KEY FUNCTIONS ....................................................................................................................................... 35
9.4 MAIN MENU.............................................................................................................................................. 36
9.5 FALSE SIGNAL SUPPRESSION ................................................................................................................. 36
9.6 FALSE ECHO STORAGE ............................................................................................................................ 38
9.6.1 ECHO CURVE MEMORY.................................................................................................................. 38
9.7 CONFIGURING FOR MEASURING WATER LEVELS ................................................................................ 39
9.8 SAVING THE INSTRUMENT SETTINGS.................................................................................................... 40
10.1 REMOVAL .................................................................................................................................................. 41
10.2 DISPOSAL.................................................................................................................................................. 41
11.1 TECHNICAL DATA..................................................................................................................................... 42
11.2 DEVIATION................................................................................................................................................ 43

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ABOUT THIS DOCUMENT
1.1 FUNCTION
This operating manual provides all the information needed for mounting, connection and setup as
well as important instructions for maintenance and fault rectification. Please read this information
before putting the instrument into operation and keep this manual accessible in the immediate
vicinity of the device.
This manual can be used with the following variants of the Radar Stage Sensor:
SDI-RADAR VARIANTS
Part Number
Description
SDI-RADAR
SDI-RADAR-420
SDI-RADAR-DISP
SDI-RADAR-DISP-MC
SDI-RADAR-MC
SDI-RADAR-MC-50
SDI-RADAR-MC-DISP-50
Base model, 1.8m (6ft) cable, 35m range
4-20mA output
SDI-RADAR with OEM display
SDI-RADAR with OEM display and military connector
SDI-RADAR with military connector
SDI-RADAR with military connector and 50ft cable
SDI-RADAR with OEM display, military connector, and 50ft cable
SDI-RADAR-64 VARIANTS
Part Number
Description
SDI-RADAR-64
SDI-RADAR-64-DISP
Base model, 1.8m (6ft) cable
SDI-RADAR-64 with OEM display
•Cable ends are flying leads unless specified as MC (military connector). Radars with a
military connector are for use with FTS Axiom Dataloggers.
•SDI-RADAR-420 an be used to connect to a 4-20mA input on a SCADA system, PLC or chart
plotter.
•The OEM display permits direct interface with the radar and must be used for false echo
suppression. It can be used for the initial setup and then removed.
1.2 TARGET GROUP
This operating manual is directed to trained specialist personnel. The contents of this manual
should be made available to these personnel and put into practice by them.
1.3 REFERENCES
SDI-RADAR information contained in this document references the Vega Puls 61 Operating
Instructions (Vega Document ID: 36499-EN-140922). SDI-RADAR-64 information contained in this
document references the Vega Puls 64 Operating Instructions (Vega Document ID: 5114-EN-190321)
Detailed explanations of Axiom Datalogger operations can be found in the FTS documents Axiom
Operator’s Manual (700-Axiom Man) and the Axiom Telemetry Reference (700-G6-Telem).

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FOR YOUR SAFETY
2.1 AUTHORIZED PERSONNEL
All operations described in these operating instructions manual must be carried out only by trained
specialist personnel.
During work on and with the device the required personal protective equipment must always be
worn.
2.2 APPROPRIATE USE
The FTS Radar Range Sensor is a sensor for continuous level measurement.
You can find detailed information about the area of application in Chapter 3: Product Description.
Operational reliability is ensured only if the instrument is properly used according to the
specifications in the operating instructions manual as well as possible supplementary instructions.
WARNING: Inappropriate or incorrect use of the instrument can give rise to
application specific hazards, e.g. damage to system components through
incorrect mounting or adjustment.
2.3 GENERAL SAFETY INSTRUCTIONS
This is a state-of-the-art instrument complying with all prevailing regulations and guidelines. The
instrument must only be operated in a technically flawless and reliable condition. The operator is
responsible for the trouble-free operation of the instrument.
During the entire duration of use, the user is obliged to determine the compliance of the necessary
occupational safety measures with the current valid rules and regulations, and take note of new
regulations.
The safety instructions in these operating instructions manual, the national installation standards as
well as the valid safety regulations and accident prevention rules must be observed by the user.
For safety and warranty reasons, any invasive work on the device beyond that described in the
operating instructions manual may be carried out only by personnel authorized by the
manufacturer. Arbitrary conversions or modifications are explicitly forbidden.
The safety approval markings and safety tips on the device must also be observed.

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The SDI-RADAR emits in the K band range. The low emitting frequencies are far below the
internationally approved limit values for exposure restrictions1. When used correctly, there is no
danger to health.
The SDI-RADAR-64 emits a continuous, high frequency signal in the W band. The low emission
power is far below the internationally approved limit values for exposure restrictions. When used
correctly, there is no danger to health.
2.3.1 ELECTROMAGNETIC COMPATABILITY
Electromagnetic interference from electrical conductors and radiated emissions must be taken into
account, as is usual with class A instruments. If the instrument is used in a different environment,
the electromagnetic compatibility to other instruments must be ensured by suitable measures.
2.4 RADIO LICENSE FOR U.S./CANADA
The instrument is in conformity with part 15 of the FCC regulations. Take note of the following two
regulations:
•The instrument must not cause any interfering emissions
•The device must be insensitive to interfering emissions, including those that may cause
undesirable operating conditions
Modifications not expressly approved by the manufacturer will lead to expiry of the operating
license according to FCC/IC.
2.5 INSTALLATION LIMITATIONS-CANADA
This device has been approved for both closed containers and open-air environments with the
following limitations:
• Closed Containers: For installations utilizing a tilt during installation: This device is limited to
installation in a completely enclosed container made of metal, reinforced fiberglass or
concrete to prevent RF emissions, which can otherwise interfere with aeronautical navigation,
the maximum approved tilt angel is 10°.
• Open Air Environment: For operation outside of closed vessels, the following condition must
be fulfilled: This device shall be installed and maintained to ensure a vertically downward
orientation of the transmit antenna's main beam. Furthermore, the use of any mechanism
that does not allow the main beam of the transmitter to be mounted vertically downward is
prohibited.
• The installation of the device shall be done by trained installers, in strict compliance with the
manufacturer's instructions.
1The International limit value for radiation of persons is < 10 mW/m² for a continuous emission. The FTS Radar Stage
Sensor operates emits <10μW/m² in pulsed emissions.

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• This device shall be installed only at fixed locations. The device shall not operate while being
moved or while inside a moving container.
• Hand-held applications are prohibited.
• Marketing to residential consumers is prohibited.
• The use of this device is on a "no-interference, no-protection" basis. That is, the user shall
accept operations of high-powered radar in the same frequency band which may interfere
with or damage this device. • However, devices found to interfere with primary licensing
operations will be required to be removed at the user's expense.
2.5.1 OPERATING NEAR PENTICTON OR IN THE OKANAGON VALLEY, B.C.
The installer/user of this device shall ensure that it is at least 10 km from the Dominion
Astrophysical Radio Observatory (DRAO) near Penticton, British Columbia. The coordinates of
the DRAO are latitude 49°19′15″ N and longitude 119°37′12″W. For devices not meeting this 10
km separation (e.g., those in the Okanagan Valley, British Columbia,) the installer/user must
coordinate with, and obtain the written concurrence of, the Director of the DRAO before the
equipment can be installed or operated. The Director of the DRAO may be contacted at 250-
497-2300 (tel.) or 250-497-2355 (fax). (Alternatively, the Manager, Regulatory Standards,
Industry Canada, may be contacted.)

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PRODUCT DESCRIPTION
The FTS Radar Range Sensor is a radar sensor for continuous level measurement of liquids under
simple process conditions. It is capable of being mounted using the supplied mounting strap or
optional adaptor flange. Mounting instructions are contained in Chapter 5.
Figure 3-1: Parts of the FTS Radar Range Sensor
Mounting Strap
Electronics Housing
Datalogger Interface
Electronics Housing
Antenna Housing
Mounting Strap
Attachment Points
Reference plane
Cable Ports
Start of measuring range

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3.1 FUNCTIONAL PRINCIPLE
SDI-RADAR: The antenna of the radar sensor emits short radar pulses with a duration of
approximately 1 ns. These pulses are reflected by the target and received by the antenna as echoes.
The transit time of the radar pulses from emission to reception is proportional to the distance and
hence to the level. The determined level is converted into an appropriate output signal and output
as a measured value.
SDI-RADAR-64: The instrument emits a continuous radar signal through its antenna. This signal is
frequency modulated in the form of a sawtooth wave. The emitted signal is reflected by the medium
and received by the antenna as an echo with modified frequency. The frequency change is
proportional to the distance and is converted into the level.
The measuring range begins physically at the end of the antenna. The min./max. adjustment,
however, begins at the reference plane.
3.1.1 DEFAULT SETTINGS
The radar sensor will arrive with the following factory default settings:
1. SDI address - 0
2. Measuring Units – feet
3. Number of samples to average – 20
4. Power mode – high
5. HART operation mode: multidrop 01 (see section 3.1.2 for important information on this
setting)
3.1.2 IMPORTANT: ABOUT THE DEFAULT HART OPERATION MODE
If using the display and adjustment module to set up the radar two scenarios should be avoided
(explanations follow):
DO NOT:
1) Change the HART Operation mode to Standard
2) Reset the unit to factory defaults
1) The HART Operation Mode: multidrop 01 is the default setting as that requires 12V to
operate. If the HART Operation mode is changed to Standard, the radar will require 15V to
operate. If the on-site power supply cannot provide 15V, the radar will constantly restart
and be unusable, including reverting the unit to HART operation mode: multidrop 01, until a
15V power supply can be provided.
2) If the Vega display and adjustment module is used to reset the sensor to factory default
settings, the unit is returned to the VEGA factory defaults, not those set by the FTS factory,
which may also place the unit into the unusable condition described in (1) until 15V can be
supplied.

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3.1.3 POWER MODES
The radar can operate in two power modes:
High Power: In high power mode, one sample is taken every second, continuously. These are
stored in the buffer and available on demand. Power consumption will be higher but response
will be faster for the M command.
Low Power: In Low Power mode the radar “wakes up” when a measurement command is received.
The warming up cycle takes 65 seconds, so sampling will commence 65 seconds after the
measurement command is received. The radar will then return to the dormant state.
See section 6.1.1 and 8.3.2 for how to set the power mode using the Datalogger and SDI-12
commands respectively.
3.1.4 SCOPE OF DELIVERY
The scope of delivery encompasses:
•Radar Stage Sensor and options
•Mounting strap with fixing material
•Bubble level
•Double-sided tape

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ELECTRICAL CONNECTIONS
Normally, the radar will be shipped with all internal electrical connections in place. However, should
the supplied cables need to be replaced, the cover from the electronics enclosure on the side of the
instrument must be removed to make the connections. Figure 4-1 shows the electronics enclosure
and the relevant connection points identified.
In the 4-20 mA option, both SDI-12 and the 4-20 MA connections must be made.
4.1 SDI-12 MILITARY BAYONET CONNECTOR
When using the Radar Stage Sensor with an FTS Axiom Datalogger, the sensor is supplied with the
SDI-12 cable with military bayonet connector installed.
Cable wire colour coding and FTS standard connector pin outs are shown in the table and diagram
below:
Wire colour PinError!
Bookmark
not
defined.
Function
Red A +12 V DC power supply
White B Data
Black C Ground
If the SDI-12 CABLE is supplied without a connector, the user is responsible for connecting the
sensor to the data collection platform using the “flying leads”. Users can attach their own connector,
connect the cable via a terminal strip, or wire it directly to device electronics. Refer to the wiring
plan to connect the cable wires to the Radar Stage Sensor electronics compartment (Figure 4-2).
Wire colour Pin Function
Red 12VDC 10.6 to 16 VDC Input
White DATA Data
Black GND Ground
Bare (silver) Shield ground

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4.2 SDI-12 CONNECTION
Use 3 wire, shielded cable, preferably with red, black, white colour-coded conductors. Use cable with
a round cross section and an outer diameter of 0.17” to 0.45” to ensure the IP protection rating seal
of the cable gland. Conductor gauge must be in the AWG 20 - 24 range.
SDI-12 connection steps are as follows:
1. Ensure instrument and cable to be attached are not powered.
2. Unscrew the housing cover.
3. Loosen compression nut of the cable entry gland.
4. Remove approximately 10cm (4”) of the cable jacket, strip approximately 1cm (0.4”) of
insulation from the ends of the individual wires.
5. Insert the cable into the sensor through the cable entry.
6. Insert the wire ends into the terminals according to the wiring plan (Figure 4-1).
7. Connect the shield wire to the screw terminal (shield ground) inside the enclosure as shown
in Figure 4-1.
8. Tighten the cable gland nut and replace the housing cover.
Figure 4-1: SDI-12 Electronics Compartment and Wiring Plan
SDI-12 cable terminal
connection
Cable Entry
Port
Compression nut
Shield ground
12 VDC
Data
Ground

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4.3 4-20 MA OUTPUT OPTION CONNECTIONS
Normally, the radar will be shipped with all internal electrical connections in place. However, should
the supplied cables need to be replaced, the cover from the electronics enclosure on the side of the
instrument must be removed to make the connections. Connect the SDI-12 cable as directed in the
previous section.
For the 4-20 mA connection, use two-wire, twisted pair cable without screen. If electromagnetic
interference is expected, screened cable should be used. If screened cable is required, we
recommend connecting the cable screen on both ends to ground potential. In the sensor, the
screen must be connected directly to the internal ground terminal. The ground terminal on the
outside of the housing must be connected to the ground potential (low impedance). Use cable with a
round cross section and an outer diameter of 0.17” to 0.45” to ensure the IP protection rating seal of
the cable gland. Conductor gauge must be in the AWG 20 - 24 range.
4-20mA connection steps are as follows:
1. Ensure instrument and cable to be attached are not powered.
2. Unscrew the housing cover.
3. Loosen compression nut of the cable entry gland.
4. Remove approximately 10cm (4”) of the cable jacket, strip approximately 1cm (0.4”) of
insulation from the ends of the individual wires.
5. Insert the cable into the sensor through the cable entry.
6. Insert the wire ends into the terminals according to the wiring plan (Figure 4-2).
7. Connect the shield wire to the screw terminal inside the enclosure as shown in Figure 4-2.
8. Tighten the cable gland nut and replace the housing cover.
NOTE: Solid conductors as well as flexible conductors with wire end sleeves can be
inserted directly into the terminal openings. In case of flexible conductors without end
sleeves, press the terminal from above with a small screwdriver, the terminal opening is
then free. When the screwdriver is released, the terminal closes again.

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Figure 4-2: Electronics Compartment
NOTE: 4-20 mA wires will be Red (pos) and Black (neg) in most radars.
Figure 4-3: 4-20 mA Wiring Plans
4-20 mA cable
terminal connection
SDI-12 cable terminal
connection
Cable Entry
Port
Cable Entry
Port
Pos
Neg (-
Ground
Compression nut

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MOUNTING
5.1 GENERAL
The radar sensor can be mounted directly onto a vertical, horizontal, or angled surface using the
mounting bracket. Additionally, it can be mounted using an optional flange attachment which
accommodates mounting in an enclosure for added protection and security.
5.1.1 PROTECTION AGAINST MOISTURE
Protect your instrument against moisture ingress through the following measures:
•Only use the supplied cable and gland
•Ensure the cable gland is tightened
•When mounting horizontally, turn the housing so that the cable gland points downward
•Loop the connection cable downward in front of the cable gland
This applies particularly to outdoor mounting and installations in areas where high humidity is
expected (e.g. through cleaning processes).
5.2 INSTALLATION POSITION
When installing the sensor, the following provisions should be followed as closely as possible to
ensure the best operation of the radar. If the site does not permit the ideal radar positioning, orient
the radar as closely as possible to the recommended position to reduce the possibility of false
echoes.
Should the radar return false echoes, these can be suppressed by following the steps in Sections 9.5
and 9.6.
5.2.1 MOUNTING DISTANCE
Ideally, the radar should be mounted at a distance of at least 200 mm (7.874 in), centred on the
conical tip of the antenna housing, to the nearest solid surface.
IMPORTANT! If you cannot maintain the recommended mounting distance, you
should carry out a false signal suppression and false echo storage during setup
(sections 9.5 and 9.6 respectively).
There is no minimum measuring distance; however, the measurement accuracy decreases if the
water surface approaches within a minimum range. Refer to Section 11.2 - Deviation for details.
5.2.2 POLARIZATION AND SENSOR ORIENTATION
The emitted radar impulses of the radar sensor are electromagnetic waves. The polarization is the
direction of the electrical wave component. The position of the polarization is marked with two
integrated ridges opposite each other on the antenna housing.

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Figure 5-1: Polarization Markings
Ideally, the polarization markings should be turned towards the nearest vertical surfaces to
minimize interference with the transmitting waves. Should the site not allow mounting distances
and orientation exactly as shown, there is a possibility of false echoes being returned. Should this
occur, they can be suppressed by following the steps in Sections 9.5 and 9.6.
Direct the sensor as perpendicular as possible to the surface to achieve optimum measurement
results.
Figure 5-2: Ideal Mounting Orientation
Polarization
NOTE: When the housing is rotated,
the direction of polarization changes
and hence the influence of the false
echo on the measured value. Keep
this in mind when mounting or
making changes later.

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5.2.3 INSTALLATION OBSTRUCTIONS
The mounting location of the radar sensor should provide a clear view to the measured surface with
no equipment or fixtures crossing the signal path. Installations with obstructions such as ladders,
struts, etc., can cause false echoes and impair the useful echo.
If obstructions cannot be fully avoided, false echo storage should be carried out during setup (see
section 9.6).
False echoes can be attenuated through supplementary measures. Small, inclined sheet metal
baffles above the installations scatter the radar signals and prevent direct interfering reflections.
Figure 5-3:
5.3 ATTACHING THE MOUNTING STRAP
The mounting strap enables the radar to be attached to a vertical, horizontal, or boom
mounting. This is a very easy and effective way to align the sensor to a solid surface.
The strap is supplied but must be screwed to the sensor before setup with three hexagon
socket screws (M5 x 10) and spring washers. Required tools: Allen wrench size 4 (5/32”).
Prior to attaching the mounting strap, use it to mark where to drill the holes on the
mounting surface. Ensure you have sufficient hardware of the appropriate type and size for
the mounting surface to securely attach the radar.
To attach the strap to the radar, first remove the three protective caps placed in the
attachment points on the antenna housing shaft.
Slide the mounting strap over the attachment points at 90 degrees to the shaft ensuring the
semi-circular cut out is aligned over the bottom-most screw hole.

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Figure 5-4: Attaching the Mounting Strap and Adjusting the Angle
Place the locking washers on each of the socket screws, place them in the centre holes and
loosely screw them by hand into the attachment points. Do the same for the inclination
slide.
Adjust the strap to the desired angle and hand tighten the screws using the Allen wrench.
NOTE: Maximum torque when tightening the screws is 2.95 foot pounds (4 newton
metres).
5.4 MOUNTING INSTRUCTIONS
Attach the bubble level to the top of the electronics housing using the two-sided tape.
Attach the mounting strap to the mounting platform.
Observe the bubble level. Adjust the sensor angle as required to level the radar (see section 5.3)
and ensure the mounting strap socket screws are tightened upon completion.

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SETTING UP WITH DATA LOGGERS2
6.1 SETTING UP WITH THE FTS AXIOM DATALOGGERS
Attach the Radar Stage Sensor to one of the Datalogger’s SDI ports the using the military connector.
There are two extensions which can be used depending on which SDI-12 “M” command is used.
Details of SDI-12 measurement commands can be found in Chapter 8:
M COMMAND
USE EXTENSION:
M!
Radar or
SDI Generic
M1!
M2!
M3!
M4!
M5!
SDI Generic
Note that if you wish to log measurements from more than one of the “M” commands, then you
must set the Radar up using the Generic SDI extension. This is useful if you wish to log the average
stage provided by the M command, with the measured distance and internal temperature provided
by the M1 command.
From the Home page select the Sensors icon, Add, and then select the desired extension.
OR
Figure 6-1: Select the Extension
2For complete details of configuration (logging, current conditions, messages and transmissions etc.) refer to
the Axiom Manual (700-Axiom-Man) and the Axiom Telemetry Reference (700-Axiom–Telem).