foto assistance sisgeo1150 320

Readout units and dataloggers

 
FAQ#121 - Why can't I connect the WR-log node to my mobile phone/tablet?

Make sure ALL the following steps are verified:

  1. Check that your mobile phone/tablet is equipped with a USB OTG (On The Go) port
  2. Check that the Operating System version of the mobile phone/tablet is Android 9 or higher (the WR-Log system does not have an app for Apple iOS systems)
  3. Check that the batteries in the mobile phone/tablet are charged
  4. Check that the batteries inside the node are not discharged, that they are inserted with the correct polarity and have the correct voltage and size (Sisgeo recommend the SAFT LSH14 3.6V model, do not use the "light" model)
  5. Ensure that you always have the latest version of the WR-Log app installed (check the Sisgeo website at https://www.sisgeo.com/downloads-en/software/category/software-completi.html )
  6. Check in the Operating System settings that the WR-Log app has all permissions (storage, geolocation)
  7. Check that your mobile phone/tablet is connected to the internet for any node updates
  8. Check that your USB cable for the connection between the node and mobile phone has OTG technology
  9. Check that you have correctly and fully inserted the USB connectors in both the mobile phone and the node
  10. Check that the node's internal switch "SW A" that manages the power supply is set to "BATT".
  11. For digital nodes only: check that the switch inside node "SW B" is set to "HALF".

Sisgeo successfully uses the mobile phone model "BLACKVIEW BV4900 PRO" for all its tests with WR-Log system

WR LOG wireless dataloggers

 
FAQ#120 - Why can't I connect the MIND readout to my mobile phone/tablet?

Make sure that ALL the following steps are checked:
1. The batteries of the mobile phone/tablet and the MIND readout are charged
2. You have installed the latest version of the MIND APP (check the Google Play Store)
3. The version of the mobile phone/tablet's operating system is Android 10 or higher
4. The Bluetooth version of the mobile phone/tablet is 4.2 or higher
5. Only for Android mobile phones/tablets:
• in the Android settings, the BRAIN APP has all the permissions (storage, geolocation)
• if the system keyboard does not allow the correct decimal separator to be entered, install the "Gboard" app which allows the standard Google keyboard to be used.

MIND Readout
MIND app

 
FAQ#119 - Why can't I connect the BRAIN reel to my mobile phone/tablet? Have I connected correctly my BRAIN measuring system?

Make sure that ALL the following steps are checked:
1. The batteries of the mobile phone/tablet and the BRAIN system are charged
2. You have installed the latest version of the BRAIN APP (check the Google Play Store or Apple Store)
3. The version of the mobile phone/tablet's operating system is Android 7 or higher, or iOS 11 or higher
4. The Bluetooth version of the mobile phone/tablet is 4.2 or higher
5. Only for Android mobile phones/tablets:
• in the Android settings, the BRAIN APP has all the permissions (storage, geolocation)
• as first thing, pair the mobile phone/tablet to the BRAIN, from the Android settings, as described in the BRAIN user manual
• if the system keyboard does not allow the correct decimal separator to be entered, install the "Gboard" app which allows the standard Google keyboard to be used
6. The measuring probe is correctly connected to the BRAIN reel connector, as described in the user manual
7. Once the measuring probe (inclinometer, spiral meter or T-REX) has been connected, start a measurement or checking the system with the appropriate button of the app: the led on the BRAIN reel must never be red. A red LED means that the BRAIN reel does not see the measuring probe connected correctly.

T-REX Incremental Extensometer
B.R.A.IN MEMS inclinometer systems
B.R.A.IN App

 
FAQ#116 - How do I configure a WR-Log digital node to read RS485 Sisgeo TIMED sensors?

Sisgeo digital instruments can operate in two powering modes: TIMED or ALWAYS-ON (for more information see F.A.Q.#094 here https://www.sisgeo.com/products/faq/item/which-are-the-available-powering-mode-for-sisgeo-digital-sensors.html ).
A string of mixed instruments consisting of TIMED gauges and ALWAYS-ON gauges cannot work.
The first thing to do is therefore to check that ALL connected instruments in your array are set to TIMED mode.
You can check the powering mode of your gauges in the calibration reports of each instrument as in the example below.
The numbers "3-3" after "TIMED" are the "warming delay" and "address delay" values to be entered in the APP wizard set-up page.

TIMED example

 

In order to correctly set-up the WR-Log app for reading a string of Sisgeo digital gauges in TIMED powering mode, please follow the next screenshot as example:

- choose the protocol "Sisgeo v3" 
- insert the correspondent Warming delay value (in our example 3)
- insert the correspondent Adress delay value (in our example 3)
- insert the addresses of the gauges in your string, separated by comma without any space, in ASCENDING order (do NOT inser the addresses in random order!)
NOTE: in TIMED mode, the reading time is about WARMING_DELAY x HIGHER_RS485_ADDRESS, in our case 3 x 20 = about 60 seconds.
So, if your string is composed by 20 gauges BUT with addresses from 200 to 220, the reading time is about 3 x 220 = 660 seconts (11 minutes) to read the same 20 gauges. So that, is really important to correctly set-up the addresses of the gauges of the string to be read.

Digital node TIMED

DEX and DEX-S 3D extensometer
Electric Anchor Load Cells
MEMS In-place Inclinometers
RDS Railway Deformation System
Tilt Beam (TB) sensors
D-Tiltmeter - Digital MEMS Tiltmeters
H-Level - Liquid Level Systems
BH-Profile in-place Inclinometers
Horizontal In Place Inclinometers
WR LOG wireless dataloggers
LT-Inclibus
MD-Profile system

 
FAQ#115 - What is the best power supply for the OMNIAlog logger used to manage the FLX-Rail system?

The OMNIAlog logger for FLX-Rail has a fairly high power consumption due to the router.
If OMNIAlog is set to send data through the router after each acquisition (so every 5 minutes) it needs to be powered from the network (e.g. 220Vac)
If OMNIAlog is set to send data through the router once a day, it can be powered by solar or grid power.

OMNIAlog Datalogger

 
FAQ#113 - Why I’m not able to connect my mobile/tablet to MIND readout?

Verify that the mobile phone/tablet used does have the minimum required features:
Bluetooth Low Energy BLE 4.2
APPLE iOS 14 or higher
Android OS 9 (suggested Android OS 10 or higher)

Then please check that the mobile phone/tablet has Bluetooth on and that the MIND unit has a sufficiently charged battery.

MIND Readout

 
FAQ#112 - Which are the main troubleshooting that I have to know for MIND readout?

The up-date troubleshootings are available within MIND readout User Manual (see relevant DOWNLOD area or product page).

The main troubleshootings are:

troubleshooting 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


troubleshooting 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


troubleshooting 3

MIND Readout

 
FAQ#111 - Why I cannot read correctly my 4-20mA current loop gauge?

It could be a problem connected to the power supply given by the readout or logger. When the power supply is in the current loop (2-wire gauge) it is necessary to consider the effect of voltage drop across the shunt resistor on the voltage applied to the gauge.

For example, suppose a 4-20mA gauge requires at least 12 V to operate correctly and the readout powered with 16 V. The voltage the gauge sees is the voltage supplied by the readout minus the voltage drop in the rest of the current loop. At 20 mA output, the voltage drop across the commonly used 100 ohm resistor is 2 V.

When the voltage supplied by the readout is 16 V, this leaves 14 V for the gauge and everything is fine.
However, if the readout is powered with less than 14 V, at 20 mA current it will leave less than 12 V for the gauge. In this case, the output of the transmitter may be in error.

Wire Deformeters
MEMS In-place Inclinometers
Wire Crackmeters
Multipoint settlement gauges
MPBX - Multipoint Borehole Extensometers
MEXID Miniaturized MPBX
Fixed Extensometers
Electric Anchor Load Cells
Earth Pressure Cells
Electro-hydraulic Load Cells for Steel Linings and Struts
Crackmeters and Jointmeters
Mini OMNIAlog datalogger
Flat Jack Testing Accessories
Solid Resistive Load Cells for Pile Testing
H-Level - Liquid Level Systems
Convergence extensometer (DISCONTINUED)
Piezo-Resistive piezometers
Vented pressure transducers
Removable pressure transducers
Titanium piezometers
Drive-in piezometers
MEMS Analogue Tilt Meters

 
FAQ#110 - What's the purpose of the linear and polynomial factors written in the Calibration Reports?

Utilize the Linear Sensitivity Factors (A, B) and Ploynomial Sensitivity Factors (A, B, C, D) of the Calibration Reports permit to obtain readings in engineerig units with a maximum error as for the Calibration Report.

In the case of analogue gauges, the factors shall be applied on the electrical readings (i.e. mA, mV, digit, etc...)

In the case of digital gauges in "Legacy mode" (digital gauges with FW version 0.X, 1.X, 2.X or 3.X), the factors shall be applied on the output in engineering units (i.e. sin angle, kPa, etc...)

In the case of digital gauges in "Normal Mode" (digital gauges with FW version 3 or higher), the factors are already applied inside the gauge, so the Sensitivity Factors shall not be utilized with these instruments.
NOTE: all the new digital gauges are in "Normal mode".

For more information regarding SISGEO Calibration Report, refer to the following video https://youtu.be/BF8e3ZRcaYU

For more information on "how to use" the Sensitivity Factors with analogue gauges and with digital gauges in Legacy Mode, refer to the instruments manuals or to the following document: https://www.sisgeo.com/uploads/manuali/Addendum_data_processing/ADDENDUM_-_DATA_PROCESSING_-_EN_00.pdf

 

 

LT-Inclibus
MD-Profile system

 
FAQ#109 - Which are the limitations in terms of instruments that can be connected to WR-LOG Digital Nodes?

The limitations in terms of instruments to be connected on WR-LOG digital nodes are the following:

  • - it is not possible to connect on the same node digital gauges of different model (i.e. digital H-Levels and digital IPIs)
  • - the gauges connected on the same node shall have the same engineering unit output (i.e. degrees)
  • - the gauges connected on the same node shall have the same powering mode (i.e. ALWAYS-ON)
  • - if the instruments connected to the same node have an output with a multiplication factor (i.e. 20000 sin angle where 20000 is the multiplication factor), all the instruments shall have the same multiplication factor.

WR LOG wireless dataloggers

 
FAQ#108 - Compatible 4G and 3G bands for OMNIAlog routers model 0OMXRO4G0EU, 0OMXRO4G0NA and 0OMXRO4G0AP

ROUTER MODEL 0OMXRO4G0EU "EUROPE":
4G BANDS: B1, B3, B7, B8, B20
3G BANDS: B1, B8
Automatic fallback to 3G

 

ROUTER MODEL 0OMXRO4G0NA "NORTH AMERICA":
4G BANDS: B2, B4, B5, B12/B13
3G BANDS: B2, B5
Automatic fallback to 3G

 

ROUTER MODEL 0OMXRO4G0AP "APAC":
4G BANDS: B1, B3, B5, B7, B8, B18, B19, B21, B28, B38,B39, B40,B41
3G BANDS: B1, B5, B6, B8, B9, B19,B39
Automatic fallback to 3G

OMNIAlog Datalogger

 
FAQ#107 - Which are the WWAN capabilities of the 4G gateways?

 

Technologies Band Data rate

LTE

 

 

 

 

 

 

 

 

 

 

 

Band 1 (2100)Band 1 (2100)
Band 2 (1900 PCS)
Band 3 (1800+)
Band 4 (1700/2100 AWS-1)
Band 5 (850)
Band 7 (2600)
Band 8 (900)
Band 12 (700 ac)
Band 13 (700 c)
Band 18 (800 lower)
Band 19 (800 upper)
Band 20 (800 DD)
Band 25 (1900+)
Band 26 (850+)
Band 28 (700 APT)
Band 38 (TD 2600)
Band 39 (TD 1900+)
Band 40 (TD 2300)
Band 41 (TD 2600+

 

LTE FDD:
- Max 150Mbps (DL)
- Max 50Mbps (UL)


LTE TDD:
- Max 130Mbps (DL)
- Max 35Mbps (UL)

 

 

 

 

 

 

 

WCDMA

 

 

 

 

 

Band 1 (2100)Band 1 (2100)
Band 2 (1900 PCS)
Band 4 (1700/2100 AWS-1)
Band 5 (850)
Band 6 (850 Japan)
Band 8 (900)
Band 19 (800 upper)

 

 

DC-HSDPA:
- Max 42Mbps (DL)
HSUPA:
- Max 5.7Mbps(UL)
WCDMA:
- Max 384Mbps (DL)
- Max 384Mbps (UL)

 

 

GSM

 

 

B2 (1900 PCS)B2 (1900 PCS)
B3 (1800 dcs)
B5 (850)
B8 (900)

 

EDGE:
- Max 296Mbps (DL)
- Max 236.8Mbps (UL)
GPRS:
- Max 107Mbps (DL)
- Max 85.6Mbps (UL)

 

WR LOG wireless dataloggers

 
FAQ#094 - Which are the available powering modes for SISGEO digital sensors?

 

All SISGEO digital gauges can be settled in two different powering mode:

  • ALWAYS ON: all digital sensors switched on together. Faster solution, but high power consumption. The system will take about 1 second to read each gauge.
  • TIMED: the sensors are powered and switched-on one by one. Reading of the chain take more time than "always on", but the power consumption is lower. In this case the system will take about 3 seconds to read each gauge.

The STANDARD powering mode is ALWAYS ON, so unless otherwise requested by the Customer, the sensors are settled as default in ALWAYS ON.

 

 

 

 

DEX and DEX-S 3D extensometer
MEMS In-place Inclinometers
Tilt Beam (TB) sensors
D-Tiltmeter - Digital MEMS Tiltmeters
H-Level - Liquid Level Systems
BH-Profile in-place Inclinometers
LT-Inclibus
MD-Profile system

 
FAQ#092 – If I us a WR-LOG wireless system, when data will be available on the Gateway (SLOT TIME) and on my FTP?

WR-LOG system can send three type of data:
- Nodes data file
- Nodes health file
- Compacted or Custom Compacted file
In order to optimize the availability time, the Sampling Rate (SR) of each node must be inserted into the Gateway, so that Sisgeo STRONGLY SUGGEST to insert the sampling rates of each node into the Gateway.
If the sampling rate is not set from the gateway, the system will use a default SLOT TIME of 1 hour for Nodes data files and Compacted or Custom Compacted files.

SAMPLING RATES INSERTED INTO GATEWAY

Calculation of the SLOT TIME (data available on the Gateway)
NODES DATA FILE: (Number of nodes x 7.5 sec)
NODES HEALTH FILE: (Number of nodes x 7.5 sec) – sent to Gateway every 7 hours
COMPACTED/CUSTOM FILE: [(Number of nodes x 7.5 sec) x 1.8 ] + 600 sec

Calculation of data transmission from GATEWAY to FTP (data available on the FTP)
NODES DATA FILE: 3 minutes
NODES HEALTH FILE: 3 minutes
COMPACTED/CUSTOM FILE: 18 minutes

SAMPLING RATE SET FROM THE GATEWAY (default)
As default, the SLOT TIME is 1 hour

WR LOG slot time 2

WR LOG wireless dataloggers

 
FAQ#090 - Are the old 16/32 ch multiplexers compatible with OMNIAlog?

The OLD multiplexers 16/32 channels are compatible with OMNIAlog model GT-816.

Starting from the OMNIAlog firmware version 25.56.00, old mux 16/32ch continue to be compatible but all the new features available with 24ch multiplexers will be not available.

With OMNIAlog model GT-2400 the OLD multiplexers 16/32 ch are NOT compatible and do not work.

 

 
FAQ#089 - Which is Gateway model to choose for WR LOG wireless system?

The available gateways for WR LOG system are:

- 0LSWR868GW0 

- 0LSWR915GW0

- 0LSWR923GW0

These models differ from the frequency utilized by the internal 2G/3G modem.

In order to choose for the right gateway, please refer to the document to be downloaded by clicking on the "Document" icon.

If more than one model is suggested for the installation Country, you have to contact your Provider of mobile services in order to request which frequency it utilize.

 

WR LOG wireless dataloggers

 
FAQ#086 - How to solve the problem with dial-up connection under Windows in some languages version

When you create the dial-up remote connection to communicate with miniOMNIAlog, there could appear an error regarding the driver of the Standard Modem 56000bps used for the connection. This error appears only if you use certain versions of Windows in languages different from Italian and English.

This problem could appear both configuring manually the connection and using the software supplied from SISGEO “miniOMNIAlog Connection Tool”. This software automatically configures the connection. Otherwise, the user should configure the connection manually.

If you start the connection, there could appear an error regarding the Standard Modem 56000bps and the connection could fail.

To solve this problem, SISGEO has a special version of miniOMNIAlog Connection Tool which allows indicating which drivers for modem 56000bps can be used. Therefore, you could avoid using the drivers on the Windows version installed on the PC. In addition to the Tool, SISGEO supplies a folder containing the working drivers. These drivers originate from an English Windows version and therefore are genuine and safe.

When you are trying to connect to miniOMNIALog, and an error about drivers appears or the connection fails, it is necessary to ask to SISGEO for the special tool by opening a support ticket:

OPEN SUPPORT TICKET

After receiving the new tool, it is necessary to proceed as follow:

  • Uninstall the previous version of miniOMNIAlog Connection Tool
  • Remove any modem of dial-up connections created with the previous tool
  • Extract on desktop the content of file .ZIP
  • Install the new Tool

After having started the new Tool, you could see a new button which allows selecting the drivers in the folder of the ZIP file and so, not those on the operating system.

In so doing, a new connection which uses the working drivers creates.

Mini OMNIAlog datalogger

 
FAQ#083 – How does the TRIGGER function of OMNIAlog digital input work?

The TRIGGER function of the two digital inputs available on OMNIAlog datalogger is typically used with seismic station. In case of an event (earthquake), the seismic station is usually able to supply a certain tension on its output (typically 5Vdc). If this output is connected to the digital input of OMNIAlog, and OMNIAlog is conveniently configured, the extemporaneous acquisitions of all the sensors connected to OMNIAlog will be done (the number of acquisitions is programmable on OMNIAlog web pages). This way, after an earthquake, it is possible to compare the readings of the instrumentation connected to the two dataloggers. Therefore, it is no necessary to wait for the planned acquisitions that could take place several hours after the earthquake.

In case the extemporaneous reading generated from the digital input overlies the planned reading, this one will be done at the end of the “extemporaneous acquisition”.

In case there are different “extemporaneous acquisitions” that overlie the planned acquisition, this one has the priority. Therefore, at the end of the first extemporaneous acquisition, the planned acquisition will be done. At the end of the planned acquisition, the remaining extemporaneous readings will be executed.

The extemporaneous acquisitions are read as “normal” acquisition from OMNIAlog. Therefore, the planned alarms are notified and the acquisition is saved in OMNIAlog memory.

In events log, the event linked to the extemporaneous acquisitions appears, in order to identify them.

OMNIAlog Datalogger

 
FAQ#082 – Is there any precaution to adopt for the number of measurements saved on the OMNIAlog / miniOMNIAlog memory?

OMNIAlog is equipped with a microSD 2GB memory. This memory allows to save a very high number of readings. For this reason, it is necessary to bear in mind what follows:

  • if there are numerous readings saved in datalogger memory, exportation time both with USB pen and through web pages can take long time. For example, to export with an USB pen about 5.000.000 data point with related events logs and alarms logs, OMNIAlog needs 4-5 hours.
  • the traditional spreadsheets have some limits in number of lines and columns management. For example, Microsoft Excel and Open Office manage up to1.048.576 lines and 16.384 columns. Using the same example of the previous point, the measurement file (log measurements) extensively overtakes these limits. Therefore, opening the file, not all the measurements will be shown.
  • if the exportation needs a time period  that is superior to the configured acquisition time, the acquisitions that where planned are not done.

Therefore SISGEO strongly suggests to periodically download data and, later, to delete them from OMNIAlog memory. This way it is guaranteed an efficient data download.

 

 

 

OMNIAlog Datalogger
Mini OMNIAlog datalogger

 
FAQ#080 - What dimensions has the .CSV file in columns that contains the measures acquired with OMNIAlog and miniOMNIAlog?

The dimensions of the measures file “in columns” downloaded with OMNIAlog and miniOMNIAlog vary according to the number of sensors acquired and the stored cycles of acquisition. The higher is the number of sensors acquired and the number of cycles of acquisition stored, bigger is the dimension of the file.

It could be used the following formula to have an estimate of file dimensions:

Dimension[byte]: [(4+n)*10]+[(4+n)*6]*m

Where:

n= number of acquired channels

m= number of acquisition cycles

 

The result is expressed in “byte”

This data could be used to evaluate the data consumption in case of a transmission by e-mail or on FTP server.

 

Ces données peuvent etre utilisées pour évaluer la consommation des données en cas de transmission par email ou sur serveur FTP.

OMNIAlog Datalogger
Mini OMNIAlog datalogger

 
FAQ#079 - Is it possible to send SMS in case of alarms with miniOMNIAlog?

Yes, if miniOMNIAlog is equipped with 2G (GSM/GPRS) modem.

To do so, the user must have already configured the relative web pages.

Mini OMNIAlog datalogger

 
FAQ#078 - Is it possible to send SMS in case of alarms with OMNIAlog?

Yes, if OMNIAlog is equipped with a 2G (GSM/GPRS) modem, connected through a serial cable to its RS232 port.

OMNIAlog allows to set up alarm thresholds and the notification of these alarms could occur:

- by SMS;

- by email;

- by FTP;

- increasing the acquisition frequency;

- managing a digital output (for example to manage a siren)

In order to correctly use the first three notification modes, it is necessary to consider a suitable interface of communication:

- with a 2G modem on RS232 it is possible to send SMS, email and on FTP;

- with a HSPA router on LAN it is possible to send email and on FTP (but not SMS).

OMNIAlog Datalogger

 
FAQ#077 - Which are the maximum cable lengths from instrument to datalogger?

 

The cable lengths depend from many factors, first of all installation and cable protections (screen, earth, etc...). Assuming that instruments are installed in a workmanlike, for the maximum cable lengths should be followed the next suggestions:

DIGITAL INSTRUMENTS: see FAQ#073

ANALOGUE INSTRUMENTS: see both documents:

Cable length guide line with internal multiplexers
Cable length guide line with external multiplexers

 

 

 

LT-Inclibus
MD-Profile system

 
FAQ#076 - Why it is necessary add a termination resistor to the last digitized sensor of each RS-485 chain?

All SISGEO digitized instruments  (IPIs, Tiltmeters, H-Level…) use the RS-485 serial communication protocol

The RS485 protocol contemplate a termination resistor.

The recommended chain connection is point-to-point (multidropped) nodes as a bus mode (line). Star, ring or multiply network connection are not recommended.

SISGEO dataloggers has already a termination resistor assembled (typically 120Ω). On the opposite side (sensors side) is necessary to mount a resistor on the last device of each chain.

Without termination resistors, reflections of fast driver edges can cause multiple data edges and consequently data corruption. Termination resistors also reduce electrical noise sensitivity. The value of each termination resistor should be equal to the cable characteristic impedance (typically, 120 Ω for twisted pairs and for only one chain).

SISGEO supply the correct termination resistor (120 Ω, 240 Ω, etc.), considering the number of the chains connected to the same master unit (i.e. OMNIAlog).

The termination resistor must be connected on the appropriate sensor connector.

At the following link an example scheme:

SCHEME

OMNIAlog Datalogger
RDS Railway Deformation System
Tilt Beam (TB) sensors
D-Tiltmeter - Digital MEMS Tiltmeters
Mini OMNIAlog datalogger
H-Level - Liquid Level Systems
BH-Profile in-place Inclinometers
Horizontal In Place Inclinometers
LT-Inclibus
MD-Profile system

 
FAQ#074 - Which kind of datalogger is necessary to read a SISGEO digital sensors?

The sensors are read connecting the end cable to a Modbus Master unit (i.e. OMNIAlog or miniOMNIAlog) with RS-485 interface (DCE, Half duplex, no Echo) able to manage communication with SISGEO Modbus RTU communication protocol.

SISGEO’s communication protocol is available for the release upon request.

The power [W] of power supply must be chosen according to the sensor quantity  and power supply mode.

SISGEO suggests not to change the parameters set in factory (serial number, calibration, factors etc..)

The Modbus master unit (readout unit) must be set according to the IPI’s factory sensor configuration.

OMNIAlog Datalogger
RDS Railway Deformation System
Digital MEMS Inclinometer System (DISCONTINUED)
MEMS In-place Inclinometers
Tilt Beam (TB) sensors
D-Tiltmeter - Digital MEMS Tiltmeters
Mini OMNIAlog datalogger
H-Level - Liquid Level Systems
BH-Profile in-place Inclinometers
Horizontal In Place Inclinometers

 
FAQ#073 - Which is the maximum number of digitized sensors (RS-485, Modbus), the maximum number of chains and the maximum length of cable in a RS-485 network?

Last update: October 2021

All the SISGEO digitized sensors utilize a RS485 interface with Modbus protocol.

1.The maximum number of digitized sensors in a RS-485 network are 247 (theoretical)

2.The maximum number of digitized sensors chains that is possible to connect to Modbus master unit (as OMNIAlog or miniOMNIAlog) are 4.

3. About the maximum number of sensors in a chain and lengths, please follow the next tables:

Always ON Digital gauges

TIMED digital instruments

NOTE: The sum of “A” and “C” lengths can’t exceed 1000m. The compliance of points A and B, avoids the excessive voltage drop on the RS-485 line and guarantees the correct RS-485 network operation.

 

 

RDS Railway Deformation System
OMNIAlog Datalogger
Digital MEMS Inclinometer System (DISCONTINUED)
MEMS In-place Inclinometers
Tilt Beam (TB) sensors
D-Tiltmeter - Digital MEMS Tiltmeters
Mini OMNIAlog datalogger
H-Level - Liquid Level Systems
BH-Profile in-place Inclinometers
Horizontal In Place Inclinometers
LT-Inclibus
MD-Profile system

 
FAQ#072 - Why pushing RUN in a miniOMNIAlog webpage with 3G/2G modem the local connection with the PC gets lost?

The loss of the local connection with the PC is normal. This happens because the communication “bus” is the same between PC and miniOMNIAlog and between miniOMNIAlog and 3G/2G modem. Therefore, if you start miniOMNIAlog from the web, the communication is directed towards the 3G/2G modem. This allows to the modem to send SMS, e-mail or data on FTP server in case of need.

Mini OMNIAlog datalogger

 
FAQ#071 - Why miniOMNIAlog is supplied through the PC when it is connected through USB?

This feature allows to not consume the internal batteries during the configuration phase or during the data download.

In this way, independently from the duration of the activities above described, the internal batteries are used only during the field activities (acquisition, data dispatch etc). This guarantees a superior duration of exercise.

 

Mini OMNIAlog datalogger

 
FAQ#070 - If you disconnect the USB cable from miniOMNIAlog, the datalogger resets. Is it normal?

Yes, it is. This takes place because when you connect the PC though USB connection, miniOMNIAlog is powered by the PC. If you disconnect the USB cable, miniOMNIAlog resets to change its supply source and returns to the supply through internal battery or from an external source (solar panel or electrical supply).

Mini OMNIAlog datalogger

 
FAQ#069 - If miniOMNIAlog is supplied with internal batteries, can it read the digitized sensors SISGEO?

No, in case you have to read the SISGEO digitized sensors, it is necessary to use an additional module of power supply (code 0OMX24V030W). This is necessary to power the instrument with the necessary power supply.

This module considers the supply or from solar panel or electrical.

Mini OMNIAlog datalogger

 
FAQ#068 - Using miniOMNIAlog, is it possible to do acquisitions leaving it connected to the PC?

No, it is not possible.

miniOMNIAlog, to do correct measurements, needs to be powered or from the internal battery or from an external power supply (solar panel, electrical supply) to supply to the connected instruments the right tension and current.

Leaving connected miniOMNIAlog to the PC through USB cable, the instrument is powered directly to the PC. The USB port supplies a tension of 5Vdc and a maximum current of 500mA. These values guarantee the correct functioning of miniOMNIAlog for what concerns its management (configuration, web server surfing etc.) but they don’t guarantee the correct functioning in case of acquisitions.

Therefore, it is necessary to physically disconnect the PC from miniOMNIAlog during the acquisition cycles to do correct measurements.

 

Mini OMNIAlog datalogger

 
FAQ#067 - Is it possible to avoid the manual configuration of the dial-up remote connection and of the virtual modem necessary to communicate with miniOMNIAlog?

Yes, it is. You have to use the tool “miniOMNIAlog communcation tool” that you could find on the USB pen supplied together with miniOMNIalog and on SISGEO website in the product section.

It is not necessary to install the tool on the PC. Once you extracted it in a PC local folder, simply starting it, it is possible to do automatically both the configuration of the dial-up remote connection and the virtual modem configuration.

The addition of new miniOMNIAlogs is totally automatic. It is sufficient to connect the new miniOMNIAlog and start the software. In this case the tool adds the virtual modem associated to the new miniOMNIAlog to the already existing dial-up remote connection.

The tool is compatible with Microsoft Windows 7, Microsoft Windows 8 in version 32bit and 64bit.

 

Mini OMNIAlog datalogger

 
FAQ#066 - Why opening the file of log .CSV of OMNIAlog/miniOMNIAlog in French with Microsoft Office Excel some “strange” characters are visualized instead of some letters?

The cause of this is problem is that Excel opens the CSV files with an incorrect encoding. In the CSV files in French, there are some particular characters (example: “é”, “à”) that, to be correctly visualized, need the encoding UNICODE UTF-8. This encoding is not that of default of Excel, so the file is codified in a non-opportune way.

To correctly visualize the characters it is necessary (*):

  1. open Excel;
  2. select from the menu bar the tab “Data” and then the entry “From text”;
  3. in the window that displays, select the CSV file that you want to open;
  4. a window of file settings opens; select the entry “Delimited” and in the field “File origin” select “65001: Unicode (UTF-8)” and push “Forward”;
  5. in field “Delimiters” select “Comma” and push “Forward”;
  6. in the new screen push “End”
  7. in the window “Import data” push “OK”

* example executed on Microsoft Excel 2010

OMNIAlog Datalogger
Mini OMNIAlog datalogger

 
FAQ#065 - What kind of cable I have to use if I want to connect OMNIAlog to a PC using a LAN cable?

For a direct connection between PC and OMNIALOG, the right cable to use is a CROSSED cable.

However, it could happen that also using a STRAIGHT LAN cable, it is possible to establish the connection with OMNIAlog. This occurs because from 2011 it has been realized a function called Auto-MDIX, that is available on some Ethernet (NIC) network cards. Auto-MDIX is a physical auto-sensing directly implemented on the NIC of the used PC. Furthermore, on this PC it has to be installed the specific driver of the same card. This is necessary because with the generic drivers of Microsoft Windows this function couldn’t work correctly despite it is on the NIC.

To understand if the NIC supports the Auto-MDIX it is necessary to verify it on the technical sheets of the used PC.

Anyway, it is possible to generalized saying that if a PC works with Microsoft Windows 7 or Microsoft Windows 8 (and any hardware post 2011), it has this function enabled in the 90% of cases. Pay attention if you own a PC with Microsoft Windows XP as operating system.

OMNIAlog Datalogger

 
FAQ#064 - If I’m using the 3G/2G modem connected on port RS232 of OMNIAlog, can I simultaneously use the LAN connection, too?

No, when you use the modem connected on port COM RS232, OMNIAlog is configured (through its webserver) to transmit the traffic on serial port. This could cause connection problems if you connect the PC on the LAN port of OMNIAlog.

To use the communication on LAN port, it is necessary to disconnect the RS232 cable (or from OMNIAlog or from modem) and reboot OMNIAlog. OMNIAlog, at reboot, tries anyway to communicate with the modem through the port COM RS232 but it doesn’t find any answer, so the communication is transmitted on LAN port.

When the activity on LAN port is finished, it is necessary to do the opposite procedure: disconnect the LAN cable, connect the RS232 cable (and so the modem) and reboot OMNIALog. At reboot, OMNIAlog tries to communicate with the modem and, finding a valid answer, transmits the communication on serial port.

OMNIAlog Datalogger

 
FAQ#063 - Is it possible to connect to OMNIAlog and download data through a 2G (GSM/GPRS) or 3G (HSPA,UMTS, EDGE, GPRS,GSM) modem connected on port RS-232?

Yes. It is possible to connect to OMNIAlog and download data also by means of a Dial-up connection (with protocol PPP). The connection is established using a modem on the normal low frequency voice telephony. The connection is established through the composition of a normal telephonic number, using opportune programs called “dialer”.

The maximum speed is 9600bps, therefore the download of data from OMNIAlog could be very long.

In addition, the connection to the network ceases at the end of the call. The accidental interruption of the telephonic connection determines the disconnection of the client computer from the network. This causes the failure of the download, forcing the user to restart from the beginning.

SISGEO suggests to use the Dial-up PPP connection only in case of emergency.

The use of a 2G modem or 3G modem connected to OMNIAlog is necessary to send data through e-mail or on FTP server, or to send alarm SMS.

For remote connection to OMNIAlog, on mobile network, it is therefore preferable to use  HSPA router.

 

OMNIAlog Datalogger

 
FAQ#062 - Which ports use OMNIAlog services?

It is possible to have access to OMNIAlog mini webservers on board using any internet browser. OMNIAlog could be configured to send data / alarms through e-mail and on FTP. In addition, it has a FTP server on board and a command line mode that uses the TELNET protocol.

To use these services, OMNIAlog utilizes the following ports:

TELNET: 23

FTP SERVER: 21

SMTP: 25 (default) or that used from the user account

WEB SERVER: 80

 

OMNIAlog Datalogger

 
FAQ#061 - Does the 2G (GSM/GPRS) modem of miniOMNIAlog support 3G networks?

No. The internal modem of miniOMNIAlog is a 2G (GSM/GPRS) modem and therefore it doesn’t support 3G (UTMS) and superior networks. We recommend to ascertain with your ISP (Internet Service Provider) the presence of the 2G signal in the place chosen to install the datalogger. Otherwise, miniOMNIAlog couldn’t establish an internet connection through its modem. Normally, 3G network represents an evolution of 2G network but with different antennas and network devices. It is a common practice to maintain in operation both networks to give a global covering to all users. However, in those countries that in the past were never covered by wireless systems (2G network), the new installations consider the adoption of the last existing technology (3G or 4G networks). For this reason, there could be places where there is only a 3G signal and no 2G signal.

 

Mini OMNIAlog datalogger

 
FAQ#060 - Which characters is it possible to use in the editable fields of OMNIAlog webpages?

The characters supported by OMNIAlog webpages and by the export files are those of the standard ASCII charts (not extended). In addition to all the alphabet letters and numbers, the characters supported are:

caratteri supportati faq 59 en

You can find an example of an ASCII chart at the following link:

http://www.asciitable.com/

NOTE: The maximum number of characters for IDENTIFICATION and DESCRIPTION fields is respectively 12 and 8.

OMNIAlog Datalogger

 
FAQ#059 - Which characters is it possible to use in the editable fields of miniOMNIAlog webpages?

The characters supported by miniOMNIAlog webpages and by the export files are those of the standard ASCII charts (not extended). In addition to all the alphabet letters and numbers, the characters supported are:

caratteri supportati faq 59 en

You can find an example of an ASCII chart at the following link:

http://www.asciitable.com/

NOTE: The maximum number of characters for IDENTIFICATION and DESCRIPTION fields is respectively 12 and 8.

Mini OMNIAlog datalogger

 
FAQ#058 - To communicate through USB connection with miniOMNIAlog, is it necessary to install some software or driver?

Yes, to communicate with miniOMNIAlog by USB connection a small driver (FTDI Driver) is needed, to permit to the PC to recognize the miniOMNIAlog. Usually, if your PC is already connected to the internet when you connect miniOMNIAlog, Microsoft Windows is able to download and install this driver automatically. If Microsoft Windows does not install the driver automatically or your PC is not connected to the internet, you can download the driver for free at the following link:

http://www.ftdichip.com/Drivers/VCP.htm

You have to do this operation only one time for each PC utilized with miniOMNIAlog. After that, every time a new miniOMNIAlog is connected to these PCs, it will be automatically recognized because the driver is already installed on your PC. SISGEO suggests to check periodically the new releases of driver at the previous link.

Mini OMNIAlog datalogger

 
FAQ#057 - OMNIAlog powered by internal batteries: what to expect?

With the internal batteries power mode, OMNIAlog is automatically configured to work with reduced speed (20MHz) and the network adapter card is forcedly shut down to minimize power consumption.
Normal working expects only the data download through USB flash drive, so it’s not necessary to turn on the network adapter card.
OMNIAlog configuration through web pages should be carried out powering OMNIAlog with an external power supply unit to avoid draining the internal batteries. So if you need to configure OMNIAlog we recommend to remove for a while the internal batteries and configure OMNIAlog to work with external power supply.

OMNIAlog Datalogger

 
FAQ#056 - Are SMTPS (SSL) and SFTP supported by OMNIAlog?

OMNIAlog can be configured to send readings file by e-mail using simple authentication (SMTP) or on simple FTP.
SFTP and SMTPS (SSL) are not supported.
OMNIAlog  does not manage the security certificates.

OMNIAlog does not support also encrypted authentication (i.e. NTLM, MD5 etc.).

However, SISGEO supplies the datalogger carrying an already configured SMTP account, to allow the sending of e-mail (for sending data and alarm notifications).

The SMTP account will have the following format omniaNNNN@omnialogmail.com where "NNNN" are the last 4 digits of the serial number of the logger itself.

OMNIAlog Datalogger

 
FAQ#055 - Using the miniOMNIAlog system, is it necessary the grounding system?

To make efficient and effective the protections of miniOMNIAlog, it is INDISPENSABLE to have a grounding system. The ground is no longer necessary to guarantee quality-measurements (“measurement ground”), but it is considered only as “functional ground”.

Mini OMNIAlog datalogger

 
FAQ#054 - Can the connected PC power the miniOMNIAlog?

MiniOMNIAlog can be powered from 6 AA batteries or through an external power supply (i.e. from a little solar panel).
To preserve the batteries life, during PC connection, the power supply is automatically taken from the PC through USB cable connection. In any case a power supply (internal batteries or external power supply) is necessary to be connected.
NOTE: max current permitted on the mini USB connector is 500mA. It is not possible turn on the GPRS modem when the USB cable is connected to the PC and it is not possible to power the digitalized sensors connected to the RS485.

 

Mini OMNIAlog datalogger

 
FAQ#053 - SIM card for 3G/2G Modem

If the miniOMNIAlog has equipped with the internal  3G/2G modem a SIM with APN for internet connection is needed. The SIM selected must be enabled for internet traffic to send e-mail and file on FTP Server (for further details call your ISP “Internet Service Provider”). SISGEO suggest a Flat profile.

Mini OMNIAlog datalogger

 
FAQ#052 - Is it necessary to use an isolated USB cable?

USB port in miniOMNIAlog is not isolated.
For the connection between PC and miniOMNIAlog, SISGEO recommends to use an isolated USB cable:
this is the professional tool to avoid and fight ground loops and equalizing currents and to protect against overvoltage, that could damage miniOMNIAlog or cause flood readings.
Isolated USB cable is especially recommended when the PC and miniOMNIAlog are connected to the main electricity network.

Mini OMNIAlog datalogger

 
FAQ#050 - Are SMTPS (SSL) and SFTP supported by miniOMNIAlog?

miniOMNIAlog can be configured to send readings files via e-mail or on FTP server, using simple SMTP authentication protocol or FTP simple protocol. The protocols SFTP and SMTPS (SSL) are not supported. miniOMNIAlog does not support security layer. miniOMNIAlog also does not support encrypted authentication (eg. NTLM, MD5 etc.).

However, SISGEO supplies the datalogger carrying an already configured SMTP account, to allow the sending of e-mail (for sending data and alarm notifications).

The SMTP account will have the following format momniaNNNN@omnialogmail.com where "NNNN" are the last 4 digits of the serial number of the logger itself.

 

 

Mini OMNIAlog datalogger

 
FAQ#049 - Does miniOMNIAlog support remote connection?

No, to manage (i.e. to configure) a miniOMNIAlog it is necessary to connect a PC directly through an USB cable.

Mini OMNIAlog datalogger

 
FAQ#048 - Is it possible to use an Apple Mac to manage a miniOMNIAlog?

No software is necessary to be installed: simply connect the PC to the USB port and establish a dial-up PPP connection.
Last Apple Mac Operating System seems not support anymore dial-up PPP connection.

Mini OMNIAlog datalogger

 
FAQ#047 - Is it possible to change channels configuration of miniOMNIAlog?

Power supply type (internal batteries or external power supply), the measure type of each analog channel (current, voltage, NTC, Wheatstone bridge) and the presence of the GPRS module are configured at the factory. The user is not able to modify these settings.

Mini OMNIAlog datalogger

 
FAQ#046 - OMNIAlog: something to know to communicate with optical fiber technology

The optical fiber interface you can find in SISGEO catalogue is an ethernet switch with 4 10/100Base-TX ports (to link other LAN devices, in addition to OMNIAlog) and 2 100Base-FX ports (store and forward architecture). This interface is suitable for multi-mode fibres (50/125µm and 62.5/125µm) that allow lengths of maximum 2 km; for longer sections, you need to use a different model and single-mode fibres (9/125µm).

Generally, the supplied cables (“trunks”) have 4 mono-tube fibres, of which 2 are only in store. In SISGEO catalogue, the fibre is already connectorized (with SC-connectors) , but this solution is appropriate only if sections don’t exceed 200-300mt.

Despite they are equipped with a protection system for connectors and with a traction system for laying, it is difficult to trail some pre-connectorized trunks from a well to another for long distances. The maximum applicable traction force is approximately 500N, about 50kg. Furthermore, you need to take into account the weight of the same cable, rubbing and friction. For long lengths, it is advisable to do the connectorization on site (the intervention of a specialized technician with the right equipment is needed).

OMNIAlog Datalogger

FAQ#045 - Using the OMNIAlog system, is it necessary the grounding system?
FAQ#045 - Using the OMNIAlog system, is it necessary the grounding system?

To make efficient and effective the protections of miniOMNIAlog, it is INDISPENSABLE to have a grounding system. The ground is no longer necessary to guarantee quality-measurements (“measurement ground”), but it is considered only as “functional ground”.

OMNIAlog Datalogger

FAQ#043 - Can OMNIAlog acquire 8 or 16 instruments, without any multiplexer boards?
FAQ#043 - Can OMNIAlog acquire 8 or 16 instruments, without any multiplexer boards?

OMNIAlog is nominally a datalogger with 8 differential channels.

For every one of the 8 differential channels it is possible to connect up to:

  • N.2   2-wires 4-20mA (current loop)*
  • N.2   3 or 4-wires 4-20mA*
  • N.2   potentiometers with a 3-wires Volt output*
  • N.2   4-wires Volt-output instruments*
  • N.1   6-wires biaxial servo-inclinometer
  • N.1   5-wires uni-axial servo-inclinometer
  • N.1.  6-wires electrical load cell (Wheatstone bridge)
  • N.1   4-wires platinum resistance PT-100
  • N.1   NTC Thermistor
  • N.1   vibrating wire
  • N.1   vibrating wire + NTC Thermistor

* channels with power supply shared on the same channel

OMNIAlog Datalogger

 
FAQ#042 - Is it possible to connect a rain gauge to OMNIAlog datalogger?

Yes, the rain-gauge is connected to one of the two digital input placed in the posterior side of OMNIAlog.

For the system autonomy, it is necessary to bear in mind that OMNIAlog connected to a rain-gauge it is always in measurement mode. Therefore, it will never go in “sleep-mode”.

OMNIAlog takes a sample of the sensor continually and every 60 minutes it saves data. This interval is not configurable. At the end of every acquisition cycle, the reading is automatically reset.

OMNIAlog Datalogger

FAQ#041 - 3G/2G modem or 4G/3G router: which technology should be chosen?
FAQ#041 - 3G/2G modem or 4G/3G router: which technology should be chosen?

The use of 3G/2G modem is allowed only in these events:

  • when it is necessary only the transmission of data on user’s FTP server or e-mail automatically after every capture or one time per day)
  • when it is necessary to send an SMS in case of warning

With 3G/2G modem, the remote connection has to be considered an emergency connection. Pages uploading is extremely slow in case of inadequate signal quality. The remote connection requires a pc equipped with a GSM modem or an analogic modem connected to the phone network (not digital and not passing through telephone exchanges).

SIM card has to be:

  • Internet-enabled (with APN) for the transmission of data on FTP
  • M2M for remote connection

CONCLUSION: In case of need to manage OMNIAlog from remote, it is strongly suggested the use of routers 4G/3G.

OMNIAlog Datalogger

FAQ#040 - Does the management of 4G/3G router change according to the power supply of OMNIAlog?
FAQ#040 - Does the management of 4G/3G router change according to the power supply of OMNIAlog?

There are two communication alternatives, varying according to the power sources available on site:

  • with AC power supply it is possible to set up OMNIAlog to leave the router always turned on; therefore, the user could connect to every OMNIAlog with an Internet connection at any time;
  • with photovoltaic panels supply, being the router consumption very high, OMNIAlog has to be programmed to leave the router always turned off. The router has to be turned on only after every data capture (or one time per day) to transmit automatically the data on user’s FTP or by e-mail. In addition, the router will turn on in a 15-minutes temporary window, one time per day: during this temporary window the user can connect to OMNIAlog to set up the datalogger (once you are connected, you can stay online for all the necessary time).

OMNIAlog Datalogger

FAQ#039 - 4G/3G Router: which to choose?
FAQ#039 - 4G/3G Router: which to choose?

In order to connecting to OMNIAlog using the Internet, it is necessary to install a 3G router inside the OMNIAlog box and to insert a SIM card (with APN) into the router. This card should be Internet enabled (SIM card not included).

DUTIES:

1 - Dynamic IP traceability

  • SOLUTION A: when you send a SMS to the SIM card number, the router communicates the current IP address, that is assigned by the provider (this operation has to be done every time you want to access from remote)
  • SOLUTION B: you should create an account on a service website (for example DynDNS). Thus, the dynamic IP address will be always updated without any user intervention.
  • SOLUTION C: the user has to have a data SIM card with APN and STATIC IP.

2 – Incoming traffic block (it depends from the provider) If the provider blocks the incoming traffic of data, the only usable router is mod. 0OMXROUTVPN

  • ROUTER INTERNET HSPA-VPN HTTP (mod. 0OMXROUTVPN) With this router the user has only to get an Internet enabled SIM (with APN). The above mentioned problems could be solved thanks to a free VPN service and the configuration done at Sisgeo laboratories using all the data supplied through the “APPLICATION FORM”
  • ROUTER INTERNET HSPA 4G (mod.0OMXROUT4G0) With this router, users have to get an Internet enabled SIM card (with APN) that allows the bi-directionality (both the incoming and outgoing traffic).

CONCLUSION: with router 0OMXROUTVPN the problems of providers that supply Internet enabled SIM (with APN) only for outgoing traffic (not bi-directional) and the dynamic IP traceability could be solved. If the provider doesn’t display these critical issues, it is possible to use router 0OMXROUT4G. The dynamic IP traceability could be solved as mentioned above.

OMNIAlog Datalogger

FAQ#032 - Which is the reading method of the new generation of SISGEO vibrating wire readouts and loggers?
FAQ#032 - Which is the reading method of the new generation of SISGEO vibrating wire readouts and loggers?


For VW sensors Sisgeo has developed automatic algorithms to search for the resonant frequency in case of environmental noise or poor signal. In this way you can distinguish between the natural frequency of the sensor and the frequency of the noise, thereby reducing measurement errors and false alarms.

This method also provides improvement in the resolution.

A parameter, logged with the reading, shows the ‘quality’ of the readings. The reading quality parameter allows miniOMNIAlog and OMNIAlog to retake the measure automatically (second step) from a different start frequency.

From OMNIAlog FW ver. 7.13.19, miniOMNIAlog FW ver. 0.12.22 and CRD-400 FW ver. 1.0.31 an adaptive excitation method is added. Also a ‘tracking’ function has been added to avoid the phase of the wire research in order to reduce the measurement time.

OMNIAlog and miniOMNIAlog dataloggers also let you set some parameters (Excitation time [msec], Delay time [msec], sweep range [Hz]) for each channel.

OMNIAlog Datalogger
New Leonardo Datalogger (DISCONTINUED)
Galileo Datalogger (DISCONTINUED)
Mini OMNIAlog datalogger