Sigicom INFRA C20 User manual

Manual
Copyright © Sigicom AB 2021 Art.no. ML089-05220-0En
INFRA C20
Wireless Vibration Monitor
Art no. 080-05220-0
Manual ver. N
Valid for firmware 2.5.1

Copyright © Sigicom AB 2021
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IMPORTANT SAFETY INSTRUCTIONS
– read this before use
Operating conditions and limitations:
• The C20 shall not be submerged.
• Safe operating temperature range is -30 to +50 ºC
(-22 to +122 ºF).
• This instrument includes built-in radio transmitters and antennas.
It should be installed away from the operator or third-party
persons to be safe; a recommended minimum distance is
1 m (3 ft.).
• Before installing the instrument, make sure there are no
restrictions of the use of radio transmitters at the intended site.
• Do not use the instrument in presence of flammable fumes or
gases, or in explosive atmospheres.
Li-Ion batteries:
•
Only use batteries and power supplies provided or recommended by
Sigicom, see chapter 8 Accessories.
•
Do not use C20 batteries in other products than applicable Sigicom
products.
•
A power source connected to the C20 must not be able to supply more
than 20V and 3A. A solar panel with maximum 25W power and with an
open-circuit voltage of 22V is allowed.
•
Replacement and other handling of the batteries shall only be executed
by persons who have carefully read the instructions in this manual.
•
Never keep the batteries at temperatures above 50ºC (122ºF).
•
Transportation of Li-Ion batteries by aircraft is regulated by UN and
IATA. See Appendix B - Appendix D.
•
Transportation by road or railway is exempt from dangerous goods
transportation regulations. Care should still be taken with handling and
packaging to avoid severe injury.
•
If damaged, the batteries should be individually embedded into sand in a
sturdy plastic drum container during transport. It is also recommended to
affix a “Lithium Ion” label with an additional text: ‘Damaged batteries’
on the package.
A worn-out battery, a battery with cracks or with signs of swelling or

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leakage, shall be replaced.
Note! Damaged or worn out batteries are prohibited in air freight.
•
Never incinerate, disassemble or expose the batteries in water.
•
If the terminals of the battery are shorted, the battery may become very
hot and permanently damaged.
•
Prepare your warehouse and charging sites according to Appendix C and
Appendix D.
•
Use stand-alone chargers in a well-ventilated room, well away from
flammable material, open fire and electric sparks.
•
If the battery case is penetrated, it may burn with open flame.
This equipment falls under the Waste Electrical and Electronic Equipment
Directive (WEEE directive) 2012/19/EU, category 9: monitoring and
control instruments:
• Scrapped equipment should be sent back to the manufacturer of
the equipment (Sigicom AB) for proper handling according to the
WEEE directive.
• Sigicom uses a certified local partner for recycling of scrapped
equipment.
The batteries used in this equipment falls under the Battery Directive
2006/66/EC:
• When the equipment is sold to customers in the European Union
(EU), except Sweden, the customer is the importer of the battery.
The customer must follow the rules and regulations as ratified by
each individual European Union member state, or send the
battery/equipment back to the manufacturer of the equipment
(Sigicom AB) for proper disposal.
• Swedish customers can recycle the battery in the national battery
collection system.
• Users outside the EU may send the batteries back to the
manufacturer of the equipment (Sigicom AB) for proper disposal.

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Table of Contents
1. Introduction ......................................................................................... 7
1.1. INFRA System .......................................................................... 7
1.2. INFRA C20 Vibration Monitor ................................................. 7
1.3. INFRA C20 Enclosure .............................................................. 8
1.4. Unpacking and Parts Identification ........................................... 9
2. Product Description .......................................................................... 10
2.1. Keypad .................................................................................... 10
2.2. Display .................................................................................... 11
2.3. Batteries ................................................................................... 12
2.4. External Power Connector ...................................................... 12
2.5. USB Connector (Micro-B Type) ............................................. 12
2.6. Memory Card .......................................................................... 13
2.7. SIM Cards ............................................................................... 13
3. Measuring Parts ................................................................................ 15
3.1. Measuring Hardware ............................................................... 15
3.1.1. Vibration Sensor ................................................................. 15
3.1.2. Analog Electronics .............................................................. 15
3.1.3. Analog-Digital Conversion ................................................. 15
3.1.4. Digital Signal Processing .................................................... 15
3.2. Measuring Logic ..................................................................... 16
3.2.1. Measurement Standards ...................................................... 16
3.2.2. Interval Measurements ........................................................ 16
3.2.3. Transient Recording ............................................................ 17
3.2.4. Overload Handling .............................................................. 17
3.3. Data Storage ............................................................................ 18
3.3.1. Transient Data ..................................................................... 18
3.4. Additional Hardware ............................................................... 18
3.4.1. Humidity Sensor ................................................................. 18
3.4.2. GPS Receiver ...................................................................... 18
4. Configuration and Installation .......................................................... 19
4.1. Configurations and Settings .................................................... 19
4.1.1. INFRA Net Communication Schedule ............................... 19
4.1.2. Flight Mode ......................................................................... 19
4.1.3. Configuration Menu ............................................................ 19
4.1.4. INFRA Net Messages ......................................................... 19
4.1.5. Factory Default Settings ..................................................... 19
4.2. Mounting ................................................................................. 20

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4.3. Site Startup Check ................................................................... 20
5. Operation .......................................................................................... 21
5.1. Startup ..................................................................................... 21
5.2. Start Monitoring ...................................................................... 21
5.2.1. Sensor Test .......................................................................... 22
5.3. Stop Monitoring ...................................................................... 22
5.4. INFRA Net Communication ................................................... 23
5.4.1. Automatic INFRA Net Communication ............................. 23
5.4.2. Manual INFRA Net Communication .................................. 23
5.4.3. More Communication Information ..................................... 24
5.5. Power Off ................................................................................ 24
5.6. Power Lost .............................................................................. 24
5.7. Removal and replacement of Li-Ion batteries: ........................ 25
5.8. GUI Menu ............................................................................... 26
5.8.1. Monitoring config ............................................................... 26
5.8.2. Communication Mode ........................................................ 27
5.8.3. Clock Set ............................................................................. 28
5.8.4. Clock format ....................................................................... 28
5.8.5. USB Memory Interface Mode ............................................ 29
5.8.6. Firmware Upgrade .............................................................. 30
5.8.7. Errors and Warnings ........................................................... 32
5.8.8. Power Off and Reboot ........................................................ 33
5.9. GUI Passcode .......................................................................... 34
5.10. INFRA Net Remote Control ................................................... 35
5.10.1. Remote Firmware Upgrade ................................................. 36
5.10.2. Remote Reboot ................................................................... 36
5.10.3. Remote Shut Down ............................................................. 37
5.10.4. Remote Update GPS Position ............................................. 37
6. Other Functions ................................................................................. 38
6.1. Disable Communication .......................................................... 38
6.2. GPS position ............................................................................ 38
6.3. GPS time synchronization ....................................................... 39
6.4. Time Synchronization through Internet .................................. 39
6.5. Daylight Saving Time ............................................................. 40
7. Technical Specifications ................................................................... 41
8. Accessories ....................................................................................... 42
9. Maintenance and Calibration ............................................................ 43
10. Contact and Support .......................................................................... 44

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Appendix A. Battery Level Limits .......................................................... 45
Appendix B. Li-Ion Battery Transport .................................................... 46
Appendix C. Safe Handling of Li-Ion Batteries ...................................... 47
Appendix D. In Case of Li-Ion Battery Fire ............................................ 48
Appendix E. Errors and Warnings .......................................................... 49
Appendix F. Measurement Standards ..................................................... 50
Appendix G. Configure APN ................................................................... 55
Appendix H. Enter SIM PIN code ........................................................... 56
Appendix I. Configure PPP authentication ............................................ 58
Developed and manufactured by:
Sigicom AB
Glasfibergatan 8
SE – 124 45 Älvsjö, Sweden
Support: [e-mail]

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1. Introduction
1.1. INFRA System
The INFRA field measurement system consists of rugged sensors which
sends data and status to INFRA Net, where it is processed, stored and
presented through a web interface. There are sensors which monitor
several important quantities at construction sites and infrastructure
projects, such as vibration, noise and dust etcetera.
All data is sent to INFRA Net, using the built-in cellular modem, at
various occasions:
• Monitoring is started or stopped.
• A trigger event has occurred.
• An error event has occurred.
• Manual communication is performed by the operator.
• At scheduled communication.
1.2. INFRA C20 Vibration Monitor
The C20 instrument is a complete wireless vibration monitor measuring in
vertical direction. It consists of vibration sensor elements, analog
measuring electronics, analog-digital converters, an embedded
microcontroller/DSP for digital signal processing etc., a small color
display, a six-button keypad, a memory card, a cellular modem, antennas
and batteries.
The C20 instrument requires INFRA Net for full remote control
capability, data presentation, alarms/alerts configuration and setup, and
instrumentation settings. However, most instrument settings can be done
directly at the unit using the keypad/display.

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1.3. INFRA C20 Enclosure
The enclosure base is milled out of solid aluminum and includes:
• A horizontal hole for wall-mounting (M6 or ¼” bolt).
• A vertical hole for floor-mounting (M6 or ¼” bolt).
• A front lid covering the two batteries.
• A plug at the back of the enclosure covers a desiccant bag which
needs to be replaced at regular intervals (see chapter 9).
• A plastic cap on the top covers the antennas. Removing it gives
access to the microSD memory card and SIM card, but will
seldom need to be opened.
• A separate hole at the lower left side of the unit may be used for
a wire to lock the unit to a fix and solid structure for theft
prevention.
• Three mounting setoff screws, located on the back of the
instrument enable sufficient, secure and plumb contact between
instrument and uneven vertical (or near vertical) surfaces. These
screws are not used for mounting (attachment) but used to
ensure that the instrument is plumb in the vertical direction when
attached (mounted) to a vertical surface.
• All lids, plugs and connectors are O-ring sealed.
Note! C20 instruments are not intended to be submerged in water.

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1.4. Unpacking and Parts Identification
The INFRA C20 Vibration Monitor has been shipped in protective
packaging. Please keep this and use it when transporting your equipment.
Verify the package content with the following list:
• C20 Vibration Monitor instrument.
• Foam (shock protection during transportation).
• Two (2) batteries, either inserted in unit or separate.
Note! Because of shipping regulations, batteries are charged
below 30% state of charge at delivery.
• Calibration document.
Any damage or omission should be reported immediately to Sigicom.
Keep record of the instrument’s serial number. You will be asked to give
this number in any C20 related communication you may have with
Sigicom.

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2. Product Description
2.1. Keypad
A six-button keypad is placed on the right-hand side of the unit.
Display ON / Exit / Cancel / Display OFF
Up / Increase
Down / Decrease
Monitoring start/stop
Communication status
Menu / Enter / Acknowledge / Activate
For more information about operation of the graphical user interface, see
chapter 5 Operation.
Note! The LED indicator (the green circle in the picture above) is only
used at firmware upgrade.

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2.2. Display
A color display is used to show data and status. The start screen below
presents product type, serial number and firmware version.
Press any key, or wait for a few seconds, to proceed to main screen:
The main screen is divided in six sections:
1. STATUS: FW-files available; Date and time; GPS time sync
enabled; external power; battery status and charging.
2. DATA: Measurement standard. Vibration data; interval (INTV)
or transient (EVT) values in three directions. Live values for
three directions = maximum over the last three seconds.
3. MONITORING status.
4. COMMUNICATION status.
5. GPS position status
6. ERRORS and WARNINGS
See chapter 5 for more information about this.

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2.3. Batteries
The power supply of the C20 has two Li-Ion batteries and uses the battery
with the highest voltage. The switch-over between the batteries is
automatic.
If the unit is firmly mounted, the batteries can be replaced one at the time
during normal operation without interrupting the measurement. A lock
lever holds both batteries in place when the battery lid is removed. See the
safety section at the beginning of this manual on how to replace the
batteries. Voltage, current, temperature and a digital identity of both
batteries are monitored to ensure safe use and charging.
Note! Make sure that both batteries are inserted.
2.4. External Power Connector
The external power connector is located at the left-hand side of the
instrument. Input for a 12V power supply is supported. When the battery
level is low, the external power will charge the batteries
1
. For a complete
charge, the batteries must be removed from the instrument and charged
separately.
Note! Use the plastic cap to protect the external power connector
when not in use.
2.5. USB Connector (Micro-B Type)
A Micro-USB connector, mainly used for maintenance, is on the left-hand
side of the unit. C20 is never powered through the USB interface. Do
never monitor vibrations with the USB connected.
When set through the graphical user interface, the memory card can be
accessible as a Windows drive via the USB interface. See section 5.8.5.
Firmware upgrade is normally performed remotely via INFRA Net but
may also be done via the USB interface. See section 5.8.6.
1
Only charging up to battery level 60%, in order to extend battery life

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Note! Use the plastic cap to protect the USB connector when not in
use.
2.6. Memory Card
The C20 uses a microSD memory card. It is used to store recorded data,
system logs and various status files to be communicated to INFRA Net.
No configuration data is saved on the memory card.
File formats on the memory card are only compatible with the INFRA Net
server and are not described in this manual.
The memory card can be accessible as a removable drive via the USB
connector, see section 5.8.5.
If the memory card is unintentionally missing (or corrupt), an error
message will be displayed at start-up, see Appendix E.
Please contact Sigicom Support for guidance regarding memory card
formatting or other memory card issues.
Note! Only use a memory card approved by Sigicom.
2.7. SIM Cards
If activated when ordering, the embedded SIM card is used. This is pre-
configured for each customer.
If the customer needs to use their own SIM card, a mini-SIM card can be
inserted. The mini-SIM card must have an active “data plan”. The inserted
mini-SIM card will then be used instead of the embedded SIM card.

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Figure 1. The location of the mini-SIM card.
Insert with the cut corner first and to the right.
Note! The PIN-code lock of the removable mini-SIM card must be
deactivated before use in C20. Contact your network provider for
pin-code lock deactivation.
For activation or deactivation of the embedded SIM card, please contact
Sigicom Support.

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3. Measuring Parts
3.1. Measuring Hardware
3.1.1. Vibration Sensor
The C20 uses a geophone with a low frequency response down to 4.5 Hz.
The low frequency resonance of the geophone is electrically dampened,
and their characteristics are measured during calibration and saved in the
instruments calibration memory. This data is later used as input for the
digital frequency compensation used in some measurement standards.
3.1.2. Analog Electronics
An adjustable amplifier enhances the geophone signal according to the
selected measurement standard. The signal is then low-pass filtered with
an analog filter to avoid aliasing. Then the signal passes through an
analog-digital converter and all subsequent signal processing is digital.
3.1.3. Analog-Digital Conversion
All sampling is performed at 4096 Hz. The analog-digital converter has a
16 bits resolution which, at measurements up to 250 mm/s (10 in/s) in the
largest range, provides a minimum resolution of 0.01 mm/s (0.0004 in/s).
In the display, the resolution of interval values is set to 0.05 mm/s (0.002
in/s) in this range.
3.1.4. Digital Signal Processing
The main processor of the C20 is a combined general processor and a
digital signal processor (DSP). The DSP part of the processor filters,
compensates and detects the signals according to the selected
measurement standard

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3.2. Measuring Logic
3.2.1. Measurement Standards
The C20 contains several pre-configured measurement standards, used in
different countries and for different types of measurements. More
measurement standards may be added in future firmware versions.
Measurement standard is selected through INFRA Net or the graphical
user interface.
Note! Remember to review all measurement settings after any change
of standard.
A more thorough description of the available measurement standards is
given in Appendix F.
3.2.2. Interval Measurements
The C20 processes the vibration signal through the filters and detectors of
the selected measurement standard. The interval value is the maximum
value of the processed signal within a selected interval time. When the
interval end time is reached, the maximum value is saved, and a new
interval is started. The timestamp of the interval is set to the interval end
time.
The interval time can be set to a value between 5 seconds and 20 minutes.
It is set through INFRA Net or the graphical user interface.

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3.2.3. Transient Recording
When an instantaneous value exceeds the selected trigger level, a transient
recording is initiated. A transient recording can also be initiated via the
Menu of the graphical user interface (“Manual trigger”, see section 5.8).
The trigger level can be changed through INFRA Net or the graphical user
interface. The maximum and minimum value depends on the selected
measurement standard. The trigger level is common for all standards
having the same unit, e.g. mm/s.
Note! It is very important to set to an adequate trigger level. When set too
high, there will be no recordings. If, on the other hand, the level is set too
low, there will be lots of (continuous) triggering/recordings, which would
lead to:
• Increase of battery consumption.
• Lots of data storage on memory card.
• High data transfer rate/cost.
The length of the recording is 1 second before the trigger point plus an
adjustable time between 1 and 40 seconds. The adjustable time is referred
to as “Record time” in the graphical user interface and “Transient time” in
INFRA Net.
For the maximum value (“EVT” in the graphical user interface) of the
channel transients, a frequency is estimated using a zero-crossing
algorithm.
3.2.4. Overload Handling
If analog or digital overload occurs in one or more samples during an
interval period, the interval value of that interval period is tagged with an
overload flag. Similarly, if analog or digital overload occurs in one or
more samples during recording of a transient, the corresponding transient
will be tagged with an overload flag. In this way INFRA Net can indicate
possible overload in its interval and transient data reports.
Overload is indicated in the display with a “>” before the value.

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3.3. Data Storage
C20 follows the data storage model for the new generation of Sigicom’s
INFRA instruments. Although data files are accessible through the USB
interface (see section 5.8.5), data is only readable after post-processing
through INFRA Net.
3.3.1. Transient Data
In INFRA Net it is possible to override the default setting, and filter
according to another measurement standard. INFRA Net includes all
implemented standard filters.
3.4. Additional Hardware
3.4.1. Humidity Sensor
The C20 is equipped with a humidity sensor. A warning message is sent to
INFRA Net if the relative humidity is higher than 95%. The last measured
value of the humidity can be read in the GUI, by selecting Instrument
status in the Menu, see section 5.8.
3.4.2. GPS Receiver
The C20 is equipped with a GPS receiver to locate the position of the unit
and is activated after the start of monitoring. The position data is
communicated to INFRA Net when Monitoring is started. For further
information see section 6.2.

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4. Configuration and Installation
4.1. Configurations and Settings
The customer’s INFRA Net account is pre-set from Sigicom prior to
delivery and cannot be changed by the customer. Contact Sigicom
Support if this needs to be changed.
4.1.1. INFRA Net Communication Schedule
Through INFRA Net you can set which hours the C20 shall connect
(when monitoring is on). The connection will start within the first 15
minutes (randomly distributed) of each configured hour. If there are
communication difficulties, the unit will continue to communicate until
successful, using a time delay pattern to minimize power consumption.
4.1.2. Flight Mode
C20 can be set to run in flight mode where INFRA Net (and other)
communication is inhibited, see section 5.8.2 for details.
4.1.3. Configuration Menu
For setup of monitoring parameters, go to the Monitoring configuration
menu, see section 5.8.1.
4.1.4. INFRA Net Messages
All messages are handled through INFRA Net under the Messages tab.
4.1.5. Factory Default Settings
• Communication schedule: Each hour
• Measurement standard: 1A (SS 460 48 66 Spräng, 250mm/s)
• Threshold: 2.0 mm/s (ON)
• Interval time: 2 minutes
• Record time: 4 seconds
• GPS timesync: Disabled

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4.2. Mounting
1. Identify an even surface where the C20 can be mounted.
2. Drill for the fastener (e.g a concrete anchor).
3. Insert fastener.
4. Screw a nut to the head of the bolt, keep it loose but close to head
of the screw.
5. Attach a washer to the bolt/nut.
6. Insert the bolt through the center hole of the C20 and screw the
bolt into the anchor (C20 hanging loose).
7. Hold the head of the bolt still with one tool and use an appropriate
tool to tighten the nut to secure the C20 to the wall.
If the wall or ground is not completely flat, you can adjust one or two of
the mounting screws to ensure all three have full contact with the wall.
Make sure that the C20 is firmly attached and aligned (plumb and level).
For correct measuring results, the mounting angle of the instrument must
not exceed 5º relative to the horizontal plane. Refer to Sigicom product
catalog for more information on mounting solutions.
Note! The instrument must not be submerged in water.
4.3. Site Startup Check
After mounting, it is recommended to start the instrument and check:
• Battery level
• Clock Set
• INFRA Net communication
• Monitoring