SGM LEKTRA RPL81 User manual

RPL81
80GHz Radar level transmitter
technical documentation EN Rev. of 11-01-2021

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RPL81 - contents
CONTENTS
1-WARRANTY
2-PRODUCT
3-PERFORMANCE SPECIFICATIONS
4-DIMENSIONS
5-INSTALLATION
6-ELECTRICAL CONNECTIONS
7-CONFIGURATION MODES
8-OPERATOR INTERFACE
9-QUICK SETUP
10-ADVANCED SETUP
11-FACTORY TEST AND QUALITY CERTIFICATE
page 3
page 4
page 5
page 6
page 7
page 10
page 11
page 16
page 17
page 25
page 40

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RPL81 - warranty
Products supplied by SGM LEKTRA are guaranteed for a period of 12 (twelve) months from delivery date
according to the conditions specified in our sale conditions document.
SGM LEKTRA can choose to repair or replace the Product.
If the Product is repaired it will maintain the original term of guarantee, whereas if the Product is replaced it will
have 12 (twelve) months of guarantee.
The warranty will be null if the Client modifies, repair or uses the Products for other purposes than the normal
conditions foreseen by instructions or Contract.
In no circumstances shall SGM LEKTRA be liable for direct, indirect or consequential or other loss or damage
whether caused by negligence on the part of the company or its employees or otherwise howsoever arising out
of defective goods
1-WARRANTY

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RPL81 - product
2- PRODUCT
1. Skintop M16 (IP66 version)
2. Head fixing bolt
3. Fixing bolt
4. Watertight connector M16 (IP68 version)
5. Sensor
2.1 IDENTIFICATION
Each meter has an adhesive identification plate on which are indicated the meter main data.
The following picture describes the information on the identification plate.
RPL81
24Vdc
MU0081604506
2
3
1Mod.
P. S .
S.N.
1. Product code 3. Serial number2. Power supply
1
2
33
4
IP66 Version IP68 Version
55

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3-FEATURES
RPL81 - features
Housing/sensor material
PP
Mechanical installation
2” GAS M (Flange in PP DN80 (opt.)
Protection degree
IP66/IP68 (Sensor) - IP68 (opt.)
Electrical connection
Terminals or watertight connector IP68 (opt.)
Working temperature
-20 ÷ +60°C
Pressure
from 0,5 to 1,5 bar (absolute)
Power supply
24Vdc
Power consumption
5W peak; 2,5W average
Analog output
4...20mA, max 750ohm
Relays output
n°2 3A 230Vac (n.o.)
Digital communication
MODBUS RTU
Max measure range
0.05 ÷ 10mt max
In case of non perfectly reflecting surfaces, the maximum distance value will be reduced
Blind distance
0,05m
Accuracy
±0,2% (of the measured distance) not better than ±3mm.
Resolution
2mm.
Calibration
Display module - MODBUS - 2 pushing buttons (only for IP66 version) / Bluetooth
LCD Display
VL620 (IP66 vers.) or VL621 (IP68 vers.) display/keyboard 4 buttons matrix LCD

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4-DIMENSIONS
RPL81 - dimensions
5.1 MECHANICAL DIMENSIONS
214
Ø55,5
2" G
N° 2 SKINTOP M16x1,5
Ch.68
N° 2 FIXING BOLT 2"
16 Ø190
Ø18
Ø150
2" GAS
N° 2 WATERTIGHT CONNECTOR M12x1,5
IP66 VERSION IP68 VERSION
DN80 PN6 UNI 1092-1 ange in PP (Opt.)

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RPL81 - installation
5-INSTALLATION
5.1 MOUNTING PRECAUTIONS
5.1.1 Mounting position
- Leave a 300mm (d) minimum distance between the sensor and the tank smooth wall.
- Use a protective cover to protect the sensor from weather and direct sunlight (c).
- Do not install the sensor near the load zone (a).
- Make sure that in the sensor emission beam (lobe “α” 5°) there are no obstacles (f,e) that can be
intercepted as level.
g
5.1.2 Blind distance
During installation is important to remember that in the sensor proximity there is a blind zone (or BLIND DISTANCE)
of 0.05m where the sensor can not measure.
Blind Distance0.05m

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RPL81 - installation
5.1.3 Installation in nozzle
In case of nozzle installation, make sure the sensor bottom protrudes at least 10mm from the bottom of the nozzle.
≥10mm.
Max 90mm.
5.1.4 Installation with bracket
By installing the RPL81 with the bracket it is possible to orient the emission lobe perpendicular to inclined surfaces

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RPL81 - installation
5.1.5 Agitators presence
The level measurement is possible thanks to the Auto-Tuned statistical filter.
Should rarely need to adjust the filter setting by editing 2 RPL81 sensor programming parameters:
- FILTER; this parameter is present in the Quick Setup menu and in the Advanced Configuration “SETUP” menu;
increasing the parameter value, decreases the sensor sensitivity to the level measurement sudden variations.
- F-WINDOW; this parameter is present in the Advanced Configuration “SERVICE” menu; decreasing the parameter
programmed value, increases the sensor immunity to false echoes.

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RPL81 - electrical connections
+24Vdc
0Vdc RL1 RL2
Power
Supply
MODBUS
4÷20mA
RL2 LED
Indicates the relay 2 status:
turner on, relay RL2 energized
ECO LED
Flashes during
Signal receiving
RL1 LED
Indicates the relay 1 status:
turned on, relay RL1 energized
MODE LED
Steady on
Flashes during transmission data
via MODBUS RTU
Micro USB-B
6-ELECTRICAL CONNECTIONS
6.1 IP66 VERSION CONNECTIONS
1) Separate the engine control cables or power cables from the RPL81 connection cables
2) Open the cap by unscrewing.
3) Lead the cables into the transmitter through the glands
4) Close the cap and tighten the cable glands
6.2 IP68 VERSION CONNECTIONS
BROWN
RED
YELLOW
WITHE
GREY
PINK
GREEN
BLUE
C1 C2
BROWN
RED
YELLOW
WITHE
GREY
PINK
GREEN
BLUE
GND DISPLAY
+3,3V DISPLAY
+ 4/20mA
SDA DISPLAY
- 4/20mA
SCL DISPLAY
A RS485 MODBUS
B RS485 MODBUS
N / 0V
L / +24V
C RL1
N.O. RL1
C RL2
N.O. RL2
N.C.
N.C.
SIGNALPOWER

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RPL81 - electrical connections / configuration modes
7.1 DIGITAL COMMUNICATIONS CONNECTION
7.1.1 RPL81 MODBUS RTU PC connection
1) RPL81 with MODBUS RTU communication protocol
2) USB/RS485 interface module, cod.694A004A
3) MODBUS RTU communication S/W, cod.010F105A, for RPL81 transmitter
With this software is possible:
- to connect the RPL81 transmitters in MODBUS RTU network by selecting the UID address
- to read on your PC monitor all measures in reading and RPL81 operation data
- to program all RPL81 configuration parameters
- to store the measurement readings and the operating status of RPL81
1
2
3
USB/RS485
POWER
SUPPLY
6.3 HUMIDITY INFILTRATIONS
To avoid the humidity infiltration inside the housing is recommended:
- to use a cable with a 5÷10mm outer diameter and fully tighten the M16 cable gland for electrical connections
- to fully tighten the cap
- to position the cable so that it forms a downward curve at the M16 output; in this way the condensation and/or the
rain water will tend to drip from the curve bottom
7-CONFIGURATION MODES
The RPL81 have 4 configuration/calibration modes:
- via digital communication: via MODBUS RTU, by PC
- via 2 on board buttons
- via VL620 or VL621 programming module
- via Bluetooth with Android App

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MODBUS REGISTERS FOR RPL81
Address
(dec)
Address
(hex)
(N°of
registers)
Type Description
0 0 1 unsigned int Distance
1 1 1 unsigned int Level
22 2 float Level %
66 2 float Analog output
10 A 1 unsigned int Distance 4mA
11 B 1 unsigned int Distance 20mA
12 C 1 unsigned int DAC 4mA
13 D 1 unsigned int DAC 20mA
14 E 1 unsigned int Blind distance
22 16 1 unsigned int Filter coefficent
24 18 1 unsigned int UID
37 25 1 unsigned int Delay setpoint RL1
39 27 1 unsigned int Delay setpoint RL2
42 2A 1 unsigned int Delay pump control RL1
43 2B 1
44 2C 1 unsigned int Alarm mode (MAX/MIN) RL1
45 2D 1 unsigned int Safety (NO/YES) RL1
46 2E 1 unsigned int Enable RL1
47 2F 1 unsigned int Alarm mode (MAX/MIN) RL2
48 30 1 unsigned int Safety (NO/YES) RL2
49 31 1 unsigned int Enable RL2
50 32 1 unsigned int Pump control mode RL1
51 33 1 unsigned int Enable pump control RL1
52 34 1 unsigned int Enable diagnostic alarm RL2
53 35 1 unsigned int Measurement return power
54 36 1
55 37 1 unsigned int Echo error
56 38 1
57 39 1 unsigned int Distance error
58 3A 1 unsigned int Output alarm status for analog output
59 3B 1 unsigned int Relay RL1 status
60 3C 1 unsigned int Relay RL2 status
65 41 1 unsigned int F_WINDOW value
69 45 1 unsigned int Setpoint threshold RL1 (Distance from sensor)
70 46 1 unsigned int Setpoint threshold RL2 (Distance from sensor)
71 47 1 unsigned int UPPER Setpoint pump RL1 (Distance from sensor)
72 48 1 unsigned int LOWER Setpoint pump RL1 (Distance from sensor)
73 49 1 unsigned int Modbus RS485 Parity
74 4A 1 unsigned int Modbus RS485Baudrate

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MODBUS REGISTERS FOR RPL81
Measure
unit
R W Note
mm 03h
mm 03h
% 03h
mA 03h
mm 03h 06h
mm 03h 06h
03h
03h
mm 03h 06h
03h 06h
03h 06h
s 03h 06h
s 03h 06h
s 03h 06h
03h 06h 0:MAX 1:MIN
03h 06h 0:Norm_disexcited 1:Norm_excited
03h 06h 0:disabled 1:enabled
03h 06h 0:MAX 1:MIN
03h 06h 0:Norm_disexcited 1:Norm_excited
03h 06h 0:disabled 1:enabled
03h 06h 0:EMPTYING 1:FILLING
03h 06h 0:disabled 1:enabled
03h 06h 0:disabled 1:enabled
03h 0…32767
03h
03h
03h 06h 4:21.5mA 6:38.5mA 8:HoldLastValue
03h 0: off1:on
03h 0: off1:on
03h 06h 0: filters disabled
mm 03h 06h
mm 03h 06h
mm 03h 06h
mm 03h 06h
03h 06h 0:NoParity 1:Even 2:Odd
03h 06h 0:9600 1:19200
Baud rate 9600bps
8data bit
2stop bit
no parity
no HW flowcontrol

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RPL81 - configuration modes
7.2 VIA 2 BUTTONS CALIBRATIONS (IP66 VERS. ONLY)
RPL81 has 2 buttons on board, P1 and P2, with which it is possible:
- to program the level measurement range via the 4mA and 20mA distances self-acquisition
- to program the RL1 and RL2 thresholds via the switching distances self-acquisition.
Buttom P2Buttom P1
7.2.1 4mA DISTANCE
To set the 0% level measurement (4mA) it is necessary that the real level is the one corresponding to the
“4mA Distance”; alternatively it is possible to place a target orthogonally to the RPL81 transmitter at a distance
equivalent to the 0% level. Wait until the ECO LED flashes for at least 30s, press simultaneously P1 and P2,
release them and verify that the ECO LED remains turned on.
Press P1 two times and wait for the ECO LED flashes.
The distance has been saved and automatically associated with the 0% level (4mA).
7.2.2 20mA DISTANCE
To set the 100% level measurement (4mA) it is necessary that the real level is the one corresponding to the
“20mA Distance”; alternatively it is possible to place a target orthogonally to the RPL81 transmitter at a distance
equivalent to the 100% level.
Wait until the ECO LED flashes for at least 30s, press simultaneously P1 and P2, release them and verify that the
ECO LED remains turned on.
Press P2 two times and wait for the ECO LED flashes.
The distance has been saved and automatically associated with the 100% level (4mA).
7.2.3 RL1 MAX LEVEL THRESHOLD DISTANCE
To set the RL1 maximum level alarm threshold is necessary that the real level is the one corresponding to the
“RL1 max. lev. threshold distance”; alternatively it is possible to place a target orthogonally to the RPL81 transmitter
at a distance equivalent.
Wait until the ECO LED flashes for at least 30s, press simultaneously P1 and P2, release them and
verify that the ECO LED remains turned on. Press P2 and then P1 and wait for the ECO LED flashes.
The distance has been saved and automatically associated with the RL1 threshold (see default level alarm threshold
settings on page 21)
7.2.3 RL2 MIN LEVEL THRESHOLD DISTANCE
To set the RL2 maximum level alarm threshold is necessary that the real level is the one corresponding to the
“RL2 min. lev. threshold distance”; alternatively it is possible to place a target orthogonally to the RPL81 transmitter
at a distance equivalent.
Wait until the ECO LED flashes for at least 30s, press simultaneously P1 and P2, release them and
verify that the ECO LED remains turned on. Press P1 and then P2 and wait for the ECO LED flashes.
The distance has been saved and automatically associated with the RL2 threshold (see default level alarm threshold
settings on page 22)

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RPL81 - configuration modes
7.3 CALIBRATION / CONFIGURATION VIA VL620/VL621
The VL620/VL621 programming module can be mounted and removed from the RPL81 without
affecting the unit operation. Unscrewing the cap (IP66 vers.), the VL620 module can be connected or
disconnected. For IP68 version connect the VL621 module directly to the unit.
The VL620/VL621 module are equipped with matrix LCD.
N:B: When the VL620/VL621 is connected the communication via MODBUS is inhibited.

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8.1 VL620/VL621 FEATURES
The VL620/VL621 program module has 4 buttons which allow to perform all operational, control and programming
instrument functions. In the configuration menus, is possible:
1. Submenus and parameters access; press to select and press to access.
2. Parameter options choice: Press to select the option and press to store the option.
Press to exit without storing.
3. Configure the parameter values; in some parameters the configuration is done by setting a value (eg., in the
SET DISTANCE 4mA parameter is possible to change the the corresponding distance value, in mm):
press to select the digit to be modified (the digit is highlighted in inverse ), press to change the high
lighted digits number, press to save the set value and exit automatically.
Press to exit without storing.
LEFT ARROW button:
• Exit configuration
• Back to previous menu
UP ARROW button:
• Parameter values modification
• Parameter scroll
SCROLL button:
• Cursor movement (to the right)
• Parameter scroll
ENTER button:
• Configuration access
• Options confirmation
• Parameters values confirmation
RPL81 - operator interface
8-OPERATOR INTERFACE
Displayed at the bottom indicates the correct echo signal reception
!Displayed at the top alerts that there is a generic error; press SCROLL to show the message that
indicates the present error type.
The RPL81 returns automatically to RUN mode.
QUICK SETUP - Menu with easy access for quick basic parameters configuration.
To access: from “RUN” mode press ENTER to the quick setup menu mode access, LEFT ARROW to exit.
ADVANCED SETUP - Full menu with access to all parameters, including functional parameters.
It is recommended to carefully read the complete documentation before accessing.
To access: from “RUN” mode, holding down UP ARROW, press ENTER to the advanced configuration mode
access, LEFT ARROW to exit

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Set Distance 4mA
Set Distance 20mA
Filter Type
Filter Coecient
Blind Distance
Display
RL1 Threshold
RL2 Threshold
Set Distance 4mA
0000 mm
Set Distance 20mA
0000 mm
Standard
Fast
Slow
Filter Coecient
000
Blind Distance
0000 mm
RL1 Threshold
0000 mm
RL1 Threshold
0000 mm
Distance mm
Level mm
Level %
Output mA
Parameter Default Values
10000mm
Starndard
20
200mm
Distance mm
0mm (Disabled RL1)
0mm (Disabled RL2)
500mm
>
RPL81 - quick setup
9-QUICK SETUP
9.1 - Quick Setup menu structure
9.2 - QUICK SETUP MODE
From “RUN” mode press ENTER to access the Quick Setup menu.
Select the parameters by moving the cursor with SCROLL, and confirm
with ENTER; press LEFT ARROW to exit.
4321
D
mm
SET DISTANCE 4mA
SET DISTANCE 20mA
FILTER TYPE
FILTER COEFFICENT
BLIND DISTANCE
DISPLAY
RL1 THRESHOLD
RL2 THRESHOLD
Ź

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RPL81 - quick setup
9.2.1 SET DISTANCE 4mA
Press ENTER to display the distance value associated with 4mA output.
Use SCROLL and UP ARROW to modify that value; in the example the
4mA distance is 3500mm.
Press ENTER to confirm.
9.2.2 SET DISTANCE 20mA
Press ENTER to display the distance value associated with 20mA output.
Use SCROLL and UP ARROW to modify that value; in the example the
20mA distance is 500mm.
Press ENTER to confirm.
SET DISTANCE 4mA
SET DISTANCE 20mA
FILTER TYPE
FILTER COEFFICENT
BLIND DISTANCE
DISPLAY
RL1 THRESHOLD
RL2 THRESHOLD
Ź
3500 mm
SET DISTANCE 4mA
SET DISTANCE 4mA
SET DISTANCE 20mA
FILTER TYPE
FILTER COEFFICENT
BLIND DISTANCE
DISPLAY
RL1 THRESHOLD
RL2 THRESHOLD
Ź
0500 mm
SET DISTANCE 20mA
100%
0%
20mA Distance
4mA Distance
Lelev measurement
RPL81
Reference point

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RPL81 - quick setup
9.2.3 FILTER TYPE
3 configurations are available:
STANDARD: The update speed of the measurement variation is directly
proportional to the value set in the FILTER parameter.
FAST: The update speed of the measurement variation is accelerated until it
approaches the value measured by the sensor.
SLOW-: The update speed of the measurement variation is slowed until it
approaches the value measured by the sensor.
Press SCROLL to delect the filter type.
Press ENTER to confirm.
SET DISTANCE 4mA
SET DISTANCE 20mA
MEDIUM
FILTER COEFFICENT
BLIND DISTANCE
DISPLAY
RL1 THRESHOLD
RL2 THRESHOLD
Ź
STANDARD
FAST
SLOW
Ź

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9.2.4 FILTER COEFFICIENT
Press ENTER.
Use SCROLL and UP ARROW to modify the value.
Input a value from 1 to 99.
1 maximum speed, 99 maximum slowness.
The function is deactivated with 0 (immediate response).
Press ENTER to confirm
Fast resp. 5÷10 Normal resp. 20 Slow resp. 40÷100
RPL81 - quick setup
SET DISTANCE 4mA
SET DISTANCE 20mA
FILTER TYPE
FILTER COEFFICENT
BLIND DISTANCE
DISPLAY
RL1 THRESHOLD
RL2 THRESHOLD
Ź
20
FILTER COEFFICENT