Geosense LS-G6-VW Bedienungsanleitung

User Guide V1.9

Vibrating Wire Node

5-Channel

(LS-G6-VW)

1-Channel Aluminum

Version

(LS-G6-VW-1M)

 Table of contents 
 Before starting to use Vibrating Wire Data logger   2 
 Overview of the Loadsensing Vibrating Wire Devices   3 
 Vibrating Wire Logger Speciﬁcations   4 
 Equipment provided   5 
 Sensor connection   7 
 Powering the wireless data logger   8 
 Loadsensing Device Conﬁguration   10 
 Safely Closing the Vibrating Wire Logger   19 
 Node Surge Protection   21 
 Maintenance and troubleshooting   28 
 Battery Lifespan   29 
 Data Storage   30 
 FAQs   32 
 CONTACT WORLDSENSING   35 
 
1 

Before starting to use Vibrating Wire Data logger

Please read these instructions carefully and ensure that the required conditions speciﬁed in this

document are met before using the product. Each of our edge devices includes this information

inside the packaging

General warnings

●

Follow these precautions to avoid a battery explosion or leakage of ﬂammable liquid or gas:

○

Use the correct battery type. Dispose of the batteries according to instructions. Do not dispose of the

batteries by throwing them into a ﬁre or a hot oven, or mechanically crush or cut them.

○

Do not leave the batteries in an extremely high-temperature environment.

○

Do not subject the batteries to extremely low air pressure. It may result in an explosion or leakage of

ﬂammable liquid or gas.

○

Do not short circuit the batteries. This will blow the protection fuse.

●

Batteries and equipment to be connected via the data port must meet IEC 62368-1 ES1 and PS1 requirements.

●

Equipment to be installed in restricted access areas.

Symbol

Description

Caution. Do not proceed until the instructions are clearly understood and all required

conditions are met.

Read the instructions for use carefully before using.

Caution, hot surface.

According to the European Union WEEE Directive 2012/19/EU, this product and its batteries

should not be discarded as unsorted waste.

Please send them to separate collection facilities for recovery and recycling.

It is your responsibility to dispose of your waste equipment and batteries properly. The

correct disposal of your old equipment and batteries will help prevent potential negative

consequences for the environment and human health.

Overview of the Loadsensing Vibrating Wire Devices

This user guide explains the basic procedure for conﬁguring and operating

Worldsensing’s Loadsensing LS-G6 vibrating wire nodes (LS-G6-VW, LS-G6-VW-1M). You

can ﬁnd further technical details in our data sheets.

The Loadsensing Vibrating Wire data logger is a low-power, long-range wireless edge

device. Two models are available: a 5-channel vibrating wire node where up to 5

vibrating wire sensors can be connected at the same time, and a single-channel

vibrating wire node for a single sensor.

We oer metallic versions of the single-channel and multichannel nodes.

The Loadsensing Vibrating Wire data logger can also be used as a standalone logger for

manual monitoring. It can be conﬁgured easily and connected with a USB cable and an

Android phone.

Loadsensing Vibrating Wire devices are able to read most of the vibrating wire sensors of

the market. These are used for geotechnical applications in civil works, tunnel

construction, landslides and mining.

Vibrating Wire Logger Speciﬁcations

LS-G6-VW, LS-G6-VW-1M

VIBRATING WIRE

Measurement method: embedded algorithms increasing immunity to noise.

Excitation wave

+/- 5 V

Measurement range

300 - 7000 Hz

Resolution (-40ºC to +85 ºC)

< 0,01 Hz

Accuracy (-40ºC to +85 ºC)

Resolution and accuracy depends on the sweep, as follows:

Vibrating wire

sweep range

Excitation

Frequencies (Hz)

Accuracy -

Error (%)

Resolution (Hz)

Sweep A

450 - 1 125

0.013

0.002

Sweep B

800 - 2 000

0.008

0.002

Sweep C

1 400 - 3 500

0.010

0.004

Sweep D

2 300 - 6 000

0.009

0.007

THERMISTOR

Measurement range:

0 ohm to 4 Mohm

Resolution

1 ohm

Accuracy (20 ºC)

0,05ºC (0,04 % FS)

BAROMETER

Pressure range

300 to 1.100 hPa

Relative accuracy (900 to 1050 hPa at 25ºC)

+/- 0,12 hPa

* Since ﬁrmware node version 2.43 resolution and accuracy have been improved according to the

sweep frequency group. It is very important to conﬁgure the sensor according to its sweep

frequency group, as this will be aecting both parameters.

Equipment provided

The Loadsensing nodes are shipped with the following accessories:

●

Vibrating wire data logger.

●

Antenna.

●

Antenna adapter.

The package does not include:

●

A USB-OTG conﬁguration cable.

●

Batteries.

●

A grounding connector.

●

Mounting support .

The vibrating wire logger comprises:

1. Casing.

2. RP N female connector.

Male RP N connector to RP - SMA

male and aerial with RP - SMA

male.

4. External mini USB B female

connection

5. Gore valve for protection against

condensation.

6. A grounding screw for metallic

nodes.

Cable gland.

Check the labels in the image on the right to determine the position of each component.

Data Logger Mounting

All vibrating wire data loggers can be deployed as follows, depending on the application

and the conditions of the site:

●

On a wall, using a metallic (LS-MEC-MP-001) or polycarbonate (LS-ACC-MP-P)

mounting support.

●

On a 35-mm or 50-mm mounting pole, using an aluminum mounting plate

(LS-ACC-POLE35-2/LS-ACC-POLE50-2). This includes nuts and U-bolts for

pole diameter of less than 35 mm and 50 mm.

●

Inside a manhole, with a plastic or metallic cover. No special accessories are

available for this type of mounting. Even though the data loggers are IP67

certiﬁed, if they are closed following the instructions in the chapter on Safely

closing the vibrating wire data logger from this User Guide, we strongly

recommend reading the Data Logger Installation in Manholes

guide.

You can ﬁnd drawings for our supports in the Accessories List in our knowledge base.

Sensor connection

Most vibrating wire sensors can be connected to the Loadsensing vibrating wire data

loggers. Further information can be found in the vibrating logger speciﬁcation chapter.

The data logger has a cable gland for each channel, to allow you to adjust dierent

sensor cable diameters. Each terminal block has a group of ﬁve connectors and each

group has:

●

2 vibrating wire connectors (with no polarity) VW

+/ -

●

2 thermistor connectors (with no polarity)

TH +/-

●

1 shield terminal

SHLD

The terminal blocks accept wires prepared by stripping a short length of insulation from

the end.

Wires and their pinouts must be checked with the sensor data sheet from the

manufacturer. As a workaround, pairs can be checked with a multimeter.

After you connect each terminal block, we recommend you take some sensor readings to

make sure the connections have been made correctly. Also, taking several readings will

help you check that the sensor is correctly wired to the logger and the sensor wires.

An alternative can be to compare the sensor reading at installation with a portable

readout unit.

Powering the wireless data logger

The Loadsensing vibrating wire nodes are shipped closed, without batteries. To power it

up, follow these steps:

1. Open the vibrating wire node using a 2.5 mm Allen key.

2. A small RTC battery was shipped inside the ½ AA size battery holder in our

multichannel data loggers in order to keep time regar dl ess of whether C-type

batteries are also inserted in the data logger.

Since serial 52594 and above, the ½ AA size battery holder and its battery have

been removed from the battery board to simplify the product installation and

maintenance and in line with our thrust to provide more environmentally

sustainable products by reducing battery waste.

Please take note that this update shall have no impact whatsoever on the

performance of the edge device, as since Gateway ﬁrmware version 1.12.1 the

Gateway is able to check if the node is on time. If it's not, a time synchronization

message is sent.

3. The data logger always uses UTC time, although data can be visualized in local

time in our gateway.

4. Insert C-type batteries in the battery holders. The single channel node takes only

one battery and the multichannel node has up to four (more batteries will give the

logger a longer life for a given conﬁguration). See our LS G6 data logger

recommended batteries guide for further information.

Please note our devices have reverse battery protection but it is not safe to keep

batteries reversed in the node for a long time.

Warning: There is a risk of explosion if you use the wrong batteries. Dispose of batteries according

to instructions and refer to the General Warnings from bellow.

5. As well as batteries, the logger can be powered with external power. There is a

power mode switch on the node. Turn it to whichever power mode you are using.

Please take a look at the External power options document before using this

option.

General Warnings

● We advise during usage of the batteries to observe the following precautions:

○ Risk of explosion if the battery is replaced with an incorrect type.

○ Disposal of the battery into ﬁre or a hot oven, or mechanically crushing or

cutting of a battery, can result in an explosion.

○ Leaving the battery in an extremely high temperature surrounding

environment can result in an explosion or the leakage of ﬂammable liquid or

gas.

○ The battery subjected to extremely low air pressure that may result in an

explosion or the leakage of ﬂammable liquid or gas.

○ Short-circuiting the battery will result in blowing the protection fuse.

● Batteries and equipment to be connected via the data port must meet the

requirements of ES1 and PS1 according to the IEC 62368-1.

● Equipment to be installed in restricted access areas.

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