NAVIS LW410 User manual

LW410 DISPLAY UNIT
MANUAL
Models: LW410/D, LW410XW/D, LW410XL/D
PREFACE
Thank you for purchasing the Navis tank level monitor. This manual provides information for the best performance and safe application.
This manual does not cover the sensors for which the manuals will come separately.
Read this manual carefully before starting the installation. Keep this manual after installation for future reference.
INTRODUCTION
LW410 models are long-range display units which receive data from NAVIS level sensors, display various level data and use internal
and external alarms for warnings and control of pumps, valves etc. Wi-Fi compatibility (LW410XW/D or LW410XL/D model) allows real-
time data monitoring on “Navis LiveData” web interface. 4-20 mA output (LW410XW/D or LW410XL/D model) allows connection to
external devices. Various level data can be logged to SD card (LW410XL/D model).
1. Display
2. Red and yellow alarm lights
3. Buttons
4. Relay status lights
5. Buzzer
6. SMA antenna connector
Figure 1. (LW410 display unit –front panel)
MOUNTING
Select the position where the signal reception is strong enough under all conditions. Use remote antenna if necessary.
Display unit can be mounted onto the ferrous surface with four mounting magnets (optional accessories) or with mounting screws (not
included) to any flat surface.
Mounting the display unit with screws:
Unscrew all 4 plastic screws and remove the front panel. Note that the screws can be pulled out only at the correct angle. Place the
rear panel of the display unit to the final mounting position and mark the position for the bores. Remove the casing and drill holes for
the mounting screws. Place the rear panel of the display unit in position and tighten the mounting screws. Attach the front panel of the
display unit with 4 plastic screws. Do not use excessive force to tighten plastic screws.
WIRING
Please note! Switch off the power before connecting the power supply to the display unit.
Unscrew all 4 plastic screws and remove the front panel. Connect the 12-24 V DC power supply. For using external alarm devices,
connect them to the relay connection terminals. For 4-20mA outputs (only on LW410XW/D and LW410XL/D models), connect the
connection terminals to external devices, please note 4-20mA outputs are only available on tank 1 and 2. Place the front panel back
into position and tighten the screws. Switch ON the power supply and check the operation.
Figure 2. Figure 3.
(wiring diagram for LW410/D model) (wiring diagram for LW410XW/D and LW410XL/D models)

ANTENNA CONNECTION
Connect the included antenna to the SMA connector of the display unit only when the power supply is switched OFF.
RANGE
Connection between the sensor and display unit works on a free 868 MHz band. The range is up to 1000 meters when the sensor
transmitter or antenna is mounted on elevated position with no obstacle between the sensor and the display unit antenna. Inside
buildings the range is much smaller. Normally the signal can be received through two to three walls.
When sensor is located in dug-in tank, please mount the sensor antenna above ground for optimal performance.
Additional range extending equipment like signal repeaters and auxiliary antennas can be purchased separately.
DISPLAY
Switching between pages:
With short presses of the SET button you switch between single tank display for each active tank, sensor address must be set for tank
to become active, or display all 4 tanks at once.
With the short presses of the HIST button you can view history charts for 24 hour, 7 days, 30 days and 1 year of selected tank.
Please note: to change tank press SET button shortly to return to main display and using SET button select active tank.
1. Status bar
2. Graphical display of level in tank
3. Current level in tank
Figure 4. (main display page)
Figure 5.
(other display pages)
Description of main display for each tank:
Status bar:
•Hi –High alarm: value in % or “Off”, if setting is not set
•Lo –Low alarm: value in % or “Off”, if setting is not set
•Crossed bell icon –Icon is shown when sound alarm is muted
•SD –icon is shown if SD card is inserted and working properly (only on LW410XL/D model)
•WiFi –icon is shown when WiFi connection is established, blinks when display unit transmits data to LiveData portal (only
on LW410XW/D and LW410XL/D models)
•5 bars –5 bars represent signal strength, 0 bar is lowest, 5 highest
•Signal reception icon - blinks, whenever data is received from sensor
•Temperature –if sensor supports temperature measurement, temperature is displayed in selected unit
•Empty battery icon –Icon is shown when sensor battery is running low and needs replacement
Graphical display of level in tank:
•Tank number 1 to 4
•Rectangle is shown for rectangular or custom tank shape, circle is shown for round tank
•Arrows indicate position of high and low alarm if set in settings
Current level in tank:
•Absolute level value in selected unit
•Percentage of level
Description of display showing all four tanks at once
Four tanks are shown on the display, tanks with no connected sensor are empty and contain no other information
Status bar:
•5 bars above each tank –signal strength indicator where 0 bar is lowest, 5 highest
•Signal reception icon –blinks whenever data is received from any of the four sensors
•Crossed bell icon –Icon is shown when sound alarm is muted
Graphical display of level in tanks:
•All tanks are shown as rectangles. Filled section represents level in each tank
•Arrows indicate position of high and low alarm if set in settings
Description of history charts:
Each column represents average level in tank in percentage between 0% (E –empty) and 100% (F –full)
•24-hour history: each column represents 12 minutes
•7-day history: each column represents 6 hours
•30-day history: each column represents 24 hours
2 3

•1 year history: each column represents 15 days, column is written on 1st and 15th of a month

SETTINGS MENU
To enter settings menu, hold “F” button for approximately 2 seconds, until menu is shown on screen.
For in-depth description of all parameters please refer to chapter DEVICE SETTINGS.
CONNECTING SENSOR
Ensure sensor is powered on and take a note of sensor address which is printed on sensor label.
Set the corresponding sensor address first, check the address settings procedure in the chapter “SETTINGS/Tanks”.
Fresh level data is received every five seconds. If data is not received for more than 20 seconds, the “No signal” notification appears on
the display.
SIGNAL RECEPTION
The reception symbol blinks when the display unit receives a signal from the sensor (every 5 seconds if the reception is good).
Signal strength (RSSI) is represented as 5 bars
•0 bars –signal strength is -105 dB or less. Also shown when signal is lost
•1 bar - signal strength is between -98 dB and –104 dB
•2 bars - signal strength is between -85 dB and –97 dB
•3 bars - signal strength is between -75 dB and –84 dB
•4 bars - signal strength is between -65 dB and –74 dB
•5 bars –signal strength is greater than -65 dB
When the sensor doesn't send data or when the signal is lost for a more than 20 seconds, the “No signal” notification appears on the
display, indicating that the display unit doesn’t receive data from the sensor (sensor is off or out of range).
SETTING MINIMAL AND MAXIMAL LEVELS
To ensure proper measurement, please set minimal and maximal level values.
If these values are not set correctly on the receiver, you may receive faulty measurements or measurement errors.
To set the level values enter sub-menu SETTINGS/Tanks/Set min/max level, under entry “Current level” data sent from sensor is
displayed, this data varies and may or may not represent any measurable unit depending on sensor type. You can save current level
as min or max value, these values can be edited manually for correction or if sensor is not yet connected to receiver
Figure 6. (Tank shapes and minimal/maximal level)
CAPACITY AND TANK SHAPE
To show correct level calculations please enter tank capacity, if capacity is not entered correctly, percentage calculated will still show
true value however capacity calculation in selected unit may be incorrect.
Tank shapes has to be chosen to match your tank shape when viewed from side. Tank shape will directly affect level volume
calculation depending on shape selected. If rectangular or round shape do not match your tank, you can select custom shape, where
you can enter your own linearisation values: values on the left represent height measurement in percentage, values on the right need
to be edited and represent actual tank volume.
Rectangular
Circle

RELAY OPERATION
Relays can be programmed via SETTINGS/Relays, each relay can be connected to any of the four tanks (multiple relays can be
connected to same tank), and can preform various outputs depending on parameters.
Current relay status is indicated by four relay status lights located on front panel, light is turned on when relay is closed.
Upper most relay status light indicates state of relay 1, second relay 2, third relay 3 and bottom most represents relay 4.
Each relay can operate in 5 different modes:
Off –Relay is constantly switched off
HI –This mode operates with “Alarm level” parameter. Relay will become active, once measured level is greater or equal to “Alarm
level” parameter, once measured level falls below “Alarm level”, relay will deactivate.
LO –This mode is opposite of HI mode, relay will become active, once measured level is less or equal to “Alarm level”, once measured
level is greater than “Alarm level” relay will deactivate.
Pump in –In this mode additional parameters “Pump HI level” and
“Pump LO level” must be set.
Relay will become active once measured level is less or equal to
“Pump LO level” and will remain active until measured level is equal or
greater than “Pump HI level”, at which relay will deactivate.
When relay is operating in this mode “Alarm” setting is not used
and relay operation will not trigger light or sound alarm.
Figure 7. Pump in relay mode
Pump out - In this mode additional parameters “Pump HI level” and
“Pump LO level” must be set.
Relay will become active once measured level is greater or equal to
“Pump HI level” and will remain active until measured level is less or equal
to “Pump LO level”, at which relay will deactivate.
When relay is operating in this mode “Alarm” setting is not used
and relay operation will not trigger light or sound alarm.
Figure 8. Pump out relay mode
Relay output can be inverted by selecting N/C (Normally Closed) relay “Type”.
Relay modes “HI” and “LO” support “Alarm” option, if this parameter is set to “On”, relay activation will cause light and sound alarm to
be triggered.
Warning: Use relay outputs according to relay specifications to prevent device damage!
ALARMS
Alarms are signalized via buzzer for sound signal and two lights on top of the front panel of the receiver.
Red (left) alarm light and sound signal will activate when user set alarm condition is met, conditions can be programmed in “Relays”
sub-menu, refer to chapter “SETTINGS/Relays”. This alarm can be disabled by setting parameter “SETTINGS/Relays/Alarm” to off.
Please note setting “SETTINGS/Relays/Mode/Pump in(out)” do not support alarms.
Yellow (left) alarm light and sound signal will activate when any of the “internal alarms” are triggered. These alarms can not be
disabled.
INTERNAL ALARMS
•Measurement error: when measurement error occurs - measurements are out of bounds.
•Sensor error: sensor has detected error during measurement, please refer to sensor manual for troubleshooting.
ENABLING/DISABLING ALARM
Sound alarm can be muted/un-muted by holding UP button for more than 2 seconds while not in settings menu, crossed bell icon will
appear on all main screens while alarms are muted. Sound alarm is also un-muted when device is restarted.
Alarm function can be disabled altogether for each relay, for relay alarm settings refer to chapter “RELAY OPERATION”.
Internal alarms light can not be disabled, however sound can still be muted.
4-20 MA OUTPUT (LW410XW/D AND LW410XL/D MODELS)
Outputs are connected to tank 1 and tank 2 as marked on relay board label.
20 mA is driven by level percentage linearly between 4 mA (empty tank –0 %) and 20 mA (full tank –100 %).
If tank is in error state 3.6 mA is outputted.
Please note that voltage output is equal to receiver supply voltage.

WI-FI COMPATIBILITY (LW410XW/D AND LW410XL/D MODELS)
Device Wi-Fi complies with IEEE 802.11b and IEEE 802.11g standard, works as client and can connect to any standard 2.4 GHz
wireless access point (router, modem, repeater). Access point must have global internet connection established for display unit to
function properly.
Data packet is transmitted through Wi-Fi connection to Navis LiveData web interface every minute for every connected sensor, up to 4
packets per minute. Receiver unit functions as client on network and requires no specific port forwarding for operation.
LIVEDATA WEB INTERFACE (LW410XW/D AND LW410XL/D MODELS)
LiveData web interface allows viewing of current level, history charts and history logs.
User account is required to use LiveData web interface, for more information on registration and web interface functionality please see
“Navis LiveData” user manual.
Device S/N is needed for successful registration of the device, or adding device to already existing account, to find it please see
“Settings: Wi-Fi: S/N”.
SD CARD (LW410XL/D MODEL)
Data is written to SD card in .csv (comma separated values) format. This can be imported into any spreadsheet editor (MS Excel,
LibreOffice Calc, Google spreadsheets…). Each file contains header where additional information is written and rows with logged data,
where each column is separated by comma.
Data on SD card is recorded in two types of files:
1. Daily log
•File is generated for each day, and named in YYYYMMDD.csv format
•Each row contains average data for tank in 12 minutes
2. Monthly log
•File is generated for each month, and named in YYYYMM.csv format
•Each row contains average data for tank in 24 hours (1 day)
There is a rare possibility that individual logged packets could be corrupt due to external causes, it is recommended to eliminate them
during data processing.
It is recommended to preform monthly backup of data to personal computer or any other memory storage device.
When using a new SD card it is recommended to format it in FAT32 and preform a test write to ensure proper operation.
Header description:
1. Manufacturer name Navis Elektronika
2. Device: device model and software revision
3. S/N: device SN (MAC address of WiFi module) –only shown on devices with WiFi module
4. Sensor list: for every connected sensor following information is listed: Tank number, sensor type, address, selected level unit.
5. Logging interval: logging interval 12 minutes / 24 hours
6. n/a –[Not/Available] marks any data that is not available due to data missing (no reception during that time) or data that is not
supported by sensor.
Data structure description:
1. yyyy/mm/dd: date of the log entry
2. hh:mm:ss: time of the log entry
3. Sensor: tank number
4. Level [unit]: level average in tank in selected level unit noted in log header
5. Percent [%]: average percentage of fullness
6. Temp [degC]: temperature in degrees Celsius, only available on some sensors, otherwise n/a is written
7. Rssi [-dB]: average signal strength of the RF link between receiver and sensor, value is negative dB
Data structure example:
Navis Elektronika
Device: LW410/D V6 080422
S/N: xxxxxxxxxxxx
Sensor: 1 Level sensor 011 unit=liters
Logging interval: 12 minutes
n/a - [Data not available]
yyyy/mm/dd,hh:mm:ss,Sensor,Level [unit],Percent [%],Temp [degC],Rssi [-dB]
2021/08/25,00:12:00,1,00300,030,n/a,051
2021/08/25,00:24:00,1,00300,030,n/a,050
BATTERY REPLACEMENT
When low battery icon starts blinking on main display of the tank, please replace corresponding sensor battery. For correct battery type
please refer to sensor user manual.
(only LW410XL/D) If time and date of display unit are reset to default value check the battery of real time clock and replace it if needed:
•Unscrew four plastic screws and open display unit enclosure
•Disconnect main power supply
•Replace the battery for real time clock battery back-up (1 x 3 V CR2032)
•Connect main power supply

•Reattach the front panel of the display unit and tighten four plastic screws, do not use excessive force to tighten plastic screws

DEVICE SETTINGS
To enter device settings menu press and holding SET button for approximately 2 seconds. To select entry shortly press buttons UP or
DOWN, confirm selection by short press of SET button. To exit settings menu select “Exit settings”, to exit settings completely from any
sub menu press and hold SET button for approximately 2 seconds. Device will automatically exit settings menu after 2 minutes of
inactivity and return to main screen.
Settings are saved when device is returned to main screen by any above mentioned method. If power is lost while in settings menu,
changes are lost.
Data in menu can be entered in 3 different formats:
1. Numerical entry:
Currently set value will be shown next to the entry, when selected value will blink.
To increase value by 1 press button UP, to decrease value by 1 press button DOWN. By pressing and holding UP/DOWN buttons
value will change incrementally by 10, 100... Setting is confirmed by pressing SET button.
2. List entry:
Device will show available choices, value is selected by pressing UP/DOWN buttons, selection is confirmed by pressing SET
button.
3. Text entry:
On-screen keyboard is shown on screen, blinking cursor indicates current symbol, cursor can be moved to left by pressing UP
button, to move cursor right press DOWN button, confirm selected symbol by pressing SET button. Uppercase letters can be
toggled by moving cursor over “Shift” icon and pressing SET button. To delete last symbol, move cursor to “Delete” icon and press
SET button. To confirm text entry, move cursor to “OK” icon and press SET button.
Main settings:
General
General device settings
Tanks
Configuration of tanks and sensors
Relay
Relay and alarm settings
WiFi
WiFi settings
Info
Device information
Exit settings
Exit settings and return to main screen
Settings: General
Default
Range
Description
Reset history
No
No/Yes
Reset history charts of the device
Language
English
English/Slovene
Language of device interface
Time and date
Time
12:00
Time setting
Date
15.04.2022
Date setting
Time zone
GMT+0
GMT-12 … GMT+12
Time zone offset from GMT/UTC standard time in hours. Please take
into account Daylight saving time (DST), as device does not account
for it.
Time sync
Yes
No/Yes
If setting is enabled and device Wi-Fi is connected to internet enabled
router, device will automatically sync time with time servers.
Back
Return to Settings: General
Back
Return to main settings menu
Settings: Tanks
Default
Range
Description
Tank
1
1 –4
Tank selection
Sensor address
100 (for tank 1)
0 (for tank 2,3,4)
0 –255
Sensor address of selected tank.
Signal
0 –115 dB
Signal strength shown in numerical, negative dB values and signal bar
Scan for sensors
Scan of sensors in the vicinity, scanning takes approximately 20
seconds.
Unit
Lit
Lit, hl, m3, gal, cm,
mm
Unit of capacity for selected tank. Some sensors can also preform
range measurements.
Capacity
1000
0 –9999
Capacity of the tank in selected unit. Please note that in case of range
measurement (cm, mm), this setting has no function
Set min/max levels
Set minimal and maximal level inside tank
Current level
0 –10000
Current measured value. Please note that value does not
necessarily represent true value, but rather coded measurement
sent by sensor!
Save current as
min
No/Yes
Save current measured level as minimal value –empty tank
Save current as
max
No/Yes
Save current measured level as maximal value –full tank
Min level
1000
0 –10000
Manual minimal value setting –empty tank
Max level
4000
0 –10000
Manual maximal value setting –full tank
Back
Return to Settings: Tanks
Tank shape
rectangular
rectangular, round,
custom
Tank shape impacts capacity and percentage calculations. Please
select shape that fits your tank best when viewed from the side.
Back
Return to main settings menu

Settings: Relays
Default
Range
Description
Relay
1
1 –4
Relay selection, 1 represents relay 1 as marked on relay board
Refer to tank
0
0 –4
Tank number, value 0 means this relay is disabled and will be
switched off by default. Otherwise this relay will refer to measurements
from selected tank.
Mode
Off
Relay control mode
Off
Relay is off
HI
Relay is switched on when tank % is equal or greater than “Alarm
level” value
LO
Relay is switched on when tank % is less than “Alarm level” value
Pump in
Relay is switched on when tank % is less than “Pump LO level” and is
switched off when greater than “Pump HI level”.
Pump out
Relay is switched on when tank % is greater than “Pump HI level” and
is switched off when less than “Pump LO level”.
Type
N/O
Type of relay operation
N/O
Relay works in “Normally Open” mode. This is normal operation, if
relay “Mode” is set to Off, relay disengages contacts and no current
will flow thru it.
N/C
Relay works in “Normally Closed” mode. This is inverse operation, if
relay “Mode” is set to Off, relay engages contacts and current will flow
thru it.
Error state
Rel. Off
State of relay when Internal error occurs (see INTERNAL ERRORS)
Please note this setting bypasses N/C operation and always
works in N/O mode.
Rel.Off
When Internal error occurs relay turns OFF
Rel.On
When Internal error occurs relay turns ON
Alarm level
Off
Off –100%
When relay operates in HI or LO “Mode”, this setting is used as
reference. If these modes are not used, set to OFF.
Pump HI level
Off
Off –100%
When relay operates in Pump “Mode” this setting represents
high/greater than reference. If Pump mode is not used, set this to
OFF.
Pump LO level
Off
Off –100%
When relay operates in Pump “Mode” this setting represents low/less
than reference. If Pump mode is not used, set this to OFF.
Alarm:
On
Control for audio-visual alarm (red alarm LED and sound
signal/buzzer).
On
Turn on audio-visual alarm when relay is ON
Off
This relay is not connected to audio-visual alarm
Back
Return to main settings menu
Settings: WiFi
Default
Range
Description
Scan for WiFi
Scans for available Wi-Fi access points (APs) in vicinity of the device
for 20 seconds. List of available SSIDs (Wi-Fi names) or “No Wi-Fi
found” is then displayed. Once SSID is selected, by pressing SET
button, menu will automatically switch to SSID entry menu.
SSID
32 characters
Manual entry of SSID (Wi-Fi name), once entry is confirmed device
will enter Password entry menu.
Password
32 characters
Entry for Wi-Fi access point (AP) password, once entry is confirmed
device will begin Wi-Fi test.
WiFi test
Tests connection from device to access point (AP) and from device to
Navis LiveData server.
Back
Return to main settings menu
S/N
Device S/N - MAC
Serial number (device client MAC address) needed for Navis LiveData
web interface registration or device adding.
Settings: Info
Device information is displayed here: Manufacturer name, device model, software build revision.
Please note down the critical settings in case Master rest is preformed or memory loss occurs!
Tank 1 Sensor address: _____, Unit: ___, Capacity: ________, Min level: ________, Max level: ________
Tank 2 Sensor address: _____, Unit: ___, Capacity: ________, Min level: ________, Max level: ________
Tank 3 Sensor address: _____, Unit: ___, Capacity: ________, Min level: ________, Max level: ________
Tank 4 Sensor address: _____, Unit: ___, Capacity: ________, Min level: ________, Max level: ________
Relay 1 Refer to tank: ___, Mode: _______, Type: ___, Error state: ____, Alarm level: ____, Pump HI level: ____, Pump LO level: ____, Alarm ____
Relay 2 Refer to tank: ___, Mode: _______, Type: ___, Error state: ____, Alarm level: ____, Pump HI level: ____, Pump LO level: ____, Alarm ____
Relay 3 Refer to tank: ___, Mode: _______, Type: ___, Error state: ____, Alarm level: ____, Pump HI level: ____, Pump LO level: ____, Alarm ____
Relay 4 Refer to tank: ___, Mode: _______, Type: ___, Error state: ____, Alarm level: ____, Pump HI level: ____, Pump LO level: ____, Alarm ____

MASTER RESET OF DISPLAY UNIT
Master reset will restore all device settings back to factory defaults except sensor addresses which will be retained.
To preform master reset:
•Power off the device
•Press and hold UP button
•Power on the device
•When “Master reset...” shows on screen release UP button
•Wait until “Done” and device will start normally
TROUBLESHOOTING
Symptom
Action
The display unit cannot read the
sensor
(“No signal” appears on the display)
- check if the correct sensor address is set on the display unit
- check the sensor battery –replace the battery if needed
- check the operation at a reduced distance to the display unit
“Measurement error” appears on the
screen
or wrong measurement is displayed
- check “Settings: Tanks: Set min/max level” and compare it to “Current level”. If current
level is outside the range of min and max this error will appear
- check if “Set min/max level” setting is correct
- check if “Capacity” setting is correct
- check if “Tank shape” is chosen correctly
- check if sensor is correctly installed
“Sensor error” appears on the screen
- Sensor reports problem, see sensor User manual for troubleshooting
Sensor battery low icon appears on
the screen
- Replace sensor battery
Navis LiveData is not getting updated
values
- Check if “Settings: Wi-Fi” “SSID” and “Password” are correct and preform “Wi-Fi test”
Wi-Fi test results:
•Connection failed –Device could not establish connection to access point (AP),
check password and range to AP
•No internet–AP does not have connection to world wide web, internet
- Check if device has sensor connected and is receiving data
Interrupting and weak sensor signal
- check for obstructions between sensor and display unit
- place the sensor or display unit in a different position with better signal reception
- reduce distance to the display unit
- change or install auxiliary antenna for the display unit
Unresponsive display unit
- (LW410XL/D model) check 3 V CR2032 Lithium battery (button battery) in display unit –
replace the battery if needed
- (LW410XL/D model) remove 3 V CR2032 Lithium battery and main power supply for 30
seconds to reset display unit
Time and date set to default value
- (LW410XL/D model) check the battery for real time clock battery back-up (3 V CR2032) -
replace if needed
“CRITICAL ERROR:” + error
explanation appears on the screen
- remove 3 V CR2032 Lithium battery (LW410XL/D model) and main power supply for 30
seconds to reset display unit
- if error repeats itself, contact Navis for support
“WARNING:” + error explanation +
“Press middle key to continue...”
appears on the screen
- This indicates non critical issues that may occur if device is mishandled, real time clock
battery runs out of power, external damage such as power surge occurs. Device will display
this message when it has successfully recovered but has detected an issue.
•(LW410XL/D model) RTC malfunction –Check Real time clock battery
•(Custom, Wi-Fi) Settings reset –Some or all user settings have been reset to
default values, please check all settings for validity
•Memory loss detected –Device software may be corrupted, please contact Navis
for support