ELPRO RT2e User manual

Wireless Sensor RT2e
EL6107E
Wireless Sensor RT2e
Operation Manual

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Table of Contents
1. Product description.........................................................................................5
2. General application and safety information...................................6
2.1 Antenna position.....................................................................................................6
2.2 Temperature effect .................................................................................................6
2.3 Exceptional environmental conditions ....................................................................6
2.4 Precautionary measures for handling units containing lithium batteries.................7
3. Wireless Sensor RT2e....................................................................................8
3.1 Initial startup ...........................................................................................................8
3.1.1 Transmitted frequency & radio channel.................................................8
3.2 Operation................................................................................................................9
3.3 Maintenance ...........................................................................................................9
4. Status and error messages......................................................................10
5. Technical data....................................................................................................11
5.1 Radio settings.......................................................................................................11
5.2 Environment.........................................................................................................12
5.3 Wireless Sensor RT2e - 2 external temperature sensors.....................................12
5.4 Part no. System & Accessories ............................................................................13
5.4.1 Wireless Sensor RT2e........................................................................13
5.4.2 Accessories.........................................................................................13
5.5 Label Locations.....................................................................................................14
5.6 Dimensional drawing ............................................................................................15
6. Approvals..............................................................................................................16
6.1 ETSI......................................................................................................................16
6.2 Wireless Communication reliability.......................................................................16
6.3 FCC ......................................................................................................................17
6.4 INDUSTRY CANADA ...........................................................................................18
6.5 Conclusion............................................................................................................18
Index...................................................................................................................................20

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Symbols and description codes used
Information
IMPORTANT INFORMATION AND WARNINGS
Reference to related chapter or document
CHANGES OR MODIFICATIONS MADE TO THIS EQUIPMENT MAY VOID THE ETSI / FCC
AUTHORIZATION TO OPERATE THIS EQUIPMENT.
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES AND WITH RSS-210 OF
INDUSTRY CANADA. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:
(1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE.
(2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING
INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.
- This product is subject to CE marking.
- The manufacturer guarantees that this product complies with the relevant guidelines: EN
61000-6-2 : 2001 and EN 61000-6-4 : 2001
- FCC ID: Z45-E11645398
- IC: 9954A-E11645398
- This product must be disposed of in accordance with WEEE (Waste electrical and electronic
equipment, 2002/96/EC)!
In the interest of our customers, we reserve the right to make changes due to ongoing technical
development. Asa result, images, descriptions and scope of delivery arenotbinding!Therelease
of this document is available on the printed and archived original only.
This manual is valid for firmware version 1.02 elproLOG ANALYZE 3.63

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Product description
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1. Product description
The Wireless Sensor RT2e works autonomously and is supplied with power via internal batteries.
On the front side there is a status display (green/red LED) and a type label which documents the wireless
sensor designation and the ID number of the sensor.
1.Aerial
2.Status display 3.2 Operation
3.Type label with ID numbers
4.3 batteries for the types inside the wireless sensor
5.Sensors
A wireless sensor can be connected with up to 2 sensing devices.

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General application and safety information
2. General application and safety information
2.1 Antenna position
Range approx.
1000m

Therange(alwaysdependentuponthestructural conditions of the building suchascement ceilings, water
pipes etc.) is approx. 100m in a typical office environment 5.1 Radio settings.
In which direction
should
the antenna
point?

With this type of antenna, the signal is emitted at right angles from the antenna. The direction can be
visualized as being like a CD that is skewered on the antenna. This makes it clear that it is best for the
antenna to be placed vertically, pointing upward, so that it transmits to all rooms on the same floor. If the
antenna is placed horizontally, reception is best on the floors above and below.
Metal objects such as shelves, reinforced concrete walls, ventilation and energy shafts, but also the
opening of a refrigerator door can lead to the weakening of the signal. This kind of effect is usually very
much limited to the location.
Moving the wireless sensor within an area of 2.5 meters (sometimes just a few centimeters) is usually
adequate to completely change the reception ( 3.1.1 Transmitted frequency & radio channel). Move
the wireless sensor forward, backward, up and down within this area. The wireless sensor should always
be mounted at least 1.5m above the ground.
If no direct line of sight to the wireless sensor is available, the angular position (angle in relation to the
horizontal axis and rotation of direction) can improve reception.
Placingthewireless sensors inanopenstairwellis an additionalpossibilitytoavoid one ormorereinforced
steel ceilings that are an obstacle.
For additional details regarding the antennas 5.1 Radio settings
2.2 Temperature effect
- For the range of application,5. Technical data.
- It can't be guaranteed that the loggers will function properly if the datalogger is exposed to
temperatures which exceed the specified threshold range. Experience shows that at storage
temperatures below -50°C, the battery freezes, measurements are no longer taken and setpoint
tracking may be temporarily interrupted. Once it has been returned to room temperature, the logger
must be reprogrammed before it can be used again.
- At temperatures below - 20°C, the display is not easily readable; however, longterm use is not
affected.
- For longterm use above 40°C, lithium battery passivation can lead to temporary reading problems
(self-discharge protection), which can be resolved with repeated utilization.
- At temperatures above 45°C, battery self-discharging increases. With long term use above 45°C, the
battery lifetime can be reduced by about 1/3.
- Exposure to temperatures above 55°C can result in permanent discoloration of the display.
- There is danger of a gas explosion if the lithium battery is heated to temperatures exceeding 100°C.
2.3 Exceptional environmental conditions
Pay attention to the following when using the wireless sensor in exceptional environmental conditions:
- IR radiation (heat) and superheated steam can damage the surface coating of the casing
- There is a risk that the battery may explode if the logger is used under microwave radiation
Initial startup

THE WIRELESS SENSOR MUST BE AT ROOM TEMPERATURE BEFORE INITIAL
STARTUP!

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2.4 Precautionary measures for handling units containing lithium batteries
Lithium batteries

- Do not short-circuit and charge batteries: Explosion hazard
- Do not throw units which contain batteries into fire: Explosion hazard
- Do not subject batteries to mechanical stress and do not dismantle them as leaking battery fluid is
highly corrosive and lithium can generate severe heat or can ignite a fire if it comes into contact with
moisture.
- Do not heat battery operated units to temperatures exceeding 100°C: Explosion hazard
- Avoid excessive impact
- Follow the manufacturer specifications for storing batteries
- Return batteries to the supplier for correct waste disposal

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Wireless Sensor RT2e
3. Wireless Sensor RT2e
3.1 Initial startup
The wireless sensor casing contains various operating equipment, 3 batteries and the sensor
connections.
Technical data and the assignment of terminals in the :SENSORS" field 5.3 Wireless Sensor RT2e
- 2 external temperature sensors.
Batteries

The wireless sensor uses 3 lithium 3.6V batteries. The battery capacity is sufficient for operation time of
2 - 3 years.
Replacement batteries 5.4.2 Accessories
BATTERY ERROR
This LED lights up red when the battery is inserted incorrectly.
SET key
The battery counter is reset by pressing and holding the SET key (6 seconds).
3.1.1 Transmitted frequency & radio channel
The frequency band setting is factory hard-wired. The set frequency band is marked on the top side of the
pcb during manufacturing.
The radio channel used is defined using the positions of the internal rotary switch.
SET key
By quickly pressing the SET key (1 second), the settings are acknowledged and the test of the radio
connection is started. The test lasts approx. 2 seconds. The test result is represented by repeated color
blinking in the status display at a rate of 1 per second.
RT2e 2 external PT100 temperature sensors
The external PT100 sensors can be used with 3- or 4-wire connections.
Appropriate antennas are to be used.

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In the event of a poor test result, shifting the wireless sensor can lead to an improvement in the radio
connection 2.1 Antenna position.
If no radio connection can be established, the channel settings should be checked. Radio channel
change

If the radio channel needs to be changed during operation, it is necessary to briefly press the SET key
after selecting the new channel.
3.2 Operation
Undisrupted operation is indicated by a green, blinking light of the status indicator at intervals of 10
seconds.
Status indicator

3.3 Maintenance
Maintenance
schedule

To ensure proper functioning of the wireless sensor, the following steps should be part of a periodic
maintenance schedule:
- Calibrate wireless sensor
- Replace batteries 5.4.2 Accessories
Replacing battery

Monitoring of the battery is based on an energy consumption count. For this reason, only the specific
manufacturer recommended battery should be used. Do not remove the battery from the wireless sensor
when it is not in use. The use of third party batteries or removal of batteries will produce incorrect status
information at the battery indicator.
Status display - test result
Quality of the radio connection Blinks, number Color
good radio connection 100% 5 green
80% 4 green
60% 3 green
40% 2 green
poor radio connection 20% 1 green
No radio connection or wrong settings* 1 red
Status indicator - Operation
Quality of the radio connection Blinks, number Color
good radio connection 1 green
No radio connection or wrong settings* 1 red
AFTER THE BATTERIES ARE CHANGED, THE SET KEY MUST BE PRESSED AND HELD
FOR 6 SECONDS, OTHERWISE THE ENERGY COUNTER WILL NOT FUNCTION

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Status and error messages
4. Status and error messages
Operation Blinks green at an interval of 10 seconds
Failure The interruption of the radio connection is indicated by a red blinking light at an
interval of 10 seconds. Reestablishing the radio connection can take up to 1 minute.
Connection test Blinks green / red 3.1.1 Transmitted frequency & radio channel
In the housing:
BATTERY ERRORThis LED lights up red when if one of batteries is inserted incorrectly.

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5. Technical data
5.1 Radio settings
Aerial

• External, omnidirectional
• 1/4 wavelengths
• Synthetic whip
• RP-SMA connection
• The range is approximately 1000m in open areas and with line of sight
Signal weakening
in air

This example makes the dramatic relation between free space damping and transmission frequency very
clear.
The damping factor for solid materials is 4 - 6 times higher than the factor for free space damping (air).
Channel
FCC (MHz) Color coding of
the aerial
0 - F 915 yellow
Frequency band (MHz) Signal weakening at a distance of:
10m 100m
dB Factor dB Factor
915 51.5 380 71.5 3800

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Technical data
5.2 Environment
5.3 Wireless Sensor RT2e - 2 external temperature sensors
Sensor connection
The terminal assignment for the PT100 sensors is presented in the adjacent figure.
PT100 sensors with 3 or 4 leads can be used.
Connection cables
In order to guarantee that the sensor cable has good contact, the lead ends should have between 8.5 -
9.5mm of the insulation stripped
Ambient temperature -30°C ...55°C, non-condensing
Protective class IP30
external power supply
UB
10 ...30VDC
24VDC; up to 1.6A startup current, 70mA
operation
Ambient temperature -30°C ...55°C, non-condensing
Protective clase IP54
Power supply / operating
time 3 internal lithium batteries / 2-3 years
Measurement range /
sensors -200°C ...200°C / PT100
Accuracy 25.1°C ...200.0°C +/- 0.50°C
(without sensor) -10.0°C ...25.0°C +/- 0.30°C
-200.0°C ...-10.1°C +/- 0.50°C
Length sensor cable max. 20m

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5.4 Part no. System & Accessories
5.4.1 Wireless Sensor RT2e
5.4.2 Accessories
Part no. Function
3454-US RT2e wireless sensor - 2 x external temperature
Part no. Name
2760-US Aerial 915 MHz band FCC, yellow
Included in scope of delivery
31xx-xx Diverse PT100 sensors
2820-A Replacement battery, can be stored for at least 5 years, for wireless sensor

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Technical data
5.5 Label Locations

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5.6 Dimensional drawing

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Approvals
6. Approvals
6.1 ETSI
The standards used in the evaluation of this product establish the threshold values for use in residential
areas, business and commercial areas as well as in small businesses whereby the use of the product is
intended for a business environment.
This includes the following, typical sites and spaces:
- Residential buildings/living spaces such as houses, apartments and rooms, etc.;
- Retail areas such as stores, supermarkets, etc.;
- Business premises such as municipal offices, banks, etc..;
- Entertainment businesses such as cinemas, public establishments, etc.;
- Outdoor locations such as gas stations, parking lots, sports facilities, etc.;
- Small business offices such as workshops, service centers, etc.
All areas of application are characterized by the fact that they are connected to the public low-voltage
power supply. When using in a location in a severely electromagnetically disrupted environment such as
typical industry environments, problems are likely to occur as a result of the product's inadequate
interference immunity.
R&TTE Guideline 99/5/EG
EN 300 220-1 V2.1.1 (2006-04) EN 60950-1 (2006-11)
EN 300 220-2 V2.1.2 (2007-06)
EN 301 489-1 V1.8.1 (2008-04)
EN 301 489-3 V1.4.1 (2002-08)
EMV Guideline 2004/108/EG
EN 55022 (2008-05)
EN 50130-4 (2003-09)
EN 50371 (2002-11)
Low Voltage Directive 2006/95/EG
EN 60650-1 (2006-11)
EN 61000-6-1 (2007-10)
EN 61000-6-3 (2007-09)
6.2 Wireless Communication reliability
The communication reliability for the Elpro radio sensor system, often referred to as Quality of service
(QoS) is based on the following principles:
"The used modulation is of the "Gaussian Frequency-Shift Keying (GFSK)" type. This is a type of
frequency shift keying modulation that uses a Gaussian filter to smooth positive/negative frequency
deviations:
- FCC compatible
- Address match for detection of incoming package
- Automatic retransmission of data packages
- Automatic CRC and preamble generation
- Build in test function for the radio signal
- Use of frequency hopping in the 915MHz band
- Limited number of sensors and transmitters used
- Installation requirements
Risk assessment
for Receivers and
Transmitters
The Elpro wireless system is made up of a receiver and a transmitter function in the wireless datalogger
andineach radio sensor. The receiversaredividedintothreeclasses, each having its own setofminimum
performance criteria. The classification is based upon the impact the equipment has on persons in case
of a failure.
The Elpro radio sensor system complies to a class 2 system:
A failure causes loss of function but not physical risk of a person

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6.3 FCC
In the USA, the FCC (Federal Communications Commission) regulates the use of frequencies for RF
equipment. CFR 47 part 15 (Code of Federal Regulations) covers the unlicensed ISM bands. This is
usually referred to as FCC part 15. All equipment must be certified with the FCC with the issuance of a
Grant of Authorization by the FCC. When the product is approved, the FCC issues an identification
number which the product must be marked with.
The part 15 sections for ISM band radios are:
- 15.19 / RSS-210: Manual requirements
- 15.35: General rules for certification measurements
- 15.105: Manual requirements
- 15.109: Radiated emission limits for unintentional radiators
- 15.205: Restricted bands of operation
- 15.209: Radiation limits for intentional radiators
- 15.247:FrequencyHoppingand SpreadSpectrum(FHSS), operationwithinthe bands902- 928MHz,
2400 - 2483.5 MHz
Spuriousemissions
and restricted
bands
A large part of the FCC Part 15 is about the limit of spurious emissions (harmonic component) and
restricted bands. The main concept behind part 15 is that a general set of rules must be followed, but with
exceptions for different application and frequency bands.
Emissions are divided into two parts:
- Unintended radiators, like receivers and transmitters in standby or other radiators requirements are
given in 15.109
- Intended radiators, like active transmitters requirements are given in 15.209
There are a number of restricted frequencies according to 15.205 which cannot be used for active
transmissions, but spurious emissions can be produced. The levels are given in EIRP, Electrical Field
Strength Power, at a distance of 3 meters
White Paper915MHz band
Section 15.249 gives the opportunity to use the 902-928MHz band with an output power of 50mV/m at 3
meters or -1.2dBm. The harmonics are limited to 500uV/m or -41.2dBm. This band is commonly referred
to as the 915MHz band in the USA. There are no restrictions on duty cycle or the application.
Even higher output power can be used according to section 15.247. This implies the use of frequency
hopping. The following requirements must be fulfilled for the use of the 902-928MHz band under section
15.247:
- Hopping channels shall be separated by minimum 25 kHz or the 20dB bandwidth of the hopping
channel, whichever is greater.
- The system shall hop to channel frequencies that are selected at the system hopping rate from a
pseudorandomly ordered list of hopping frequencies.
- If the 20 dB bandwidth of the hopping channel is less than 250 kHz, the system shall use at least 50
hopping frequencies and the average time of occupancy on any frequency shall not be greater than
0.4 seconds within a 20 second period.
- If the 20 dB bandwidth of the hopping channel is 250 kHz or greater, the system shall use at least 25
hopping frequencies and the average time of occupancy on any frequency shall not be greater than
0.4 seconds within a 10 second period.
- The maximum allowed 20 dB bandwidth of the hopping channel is 500 kHz.
- Maximum peak conducted output power is 1W in the 902-928MHz band if more than 50 hopping
channels are used. The limit is 0.125W for 25 to 50 hopping channels.
Frequency Electrical Field Strength EIRP
216-960MHz 200mV/m -49.2dBm

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Approvals
FCC STATEMENT This product has been tested and complies with the specifications for a Class B digital device, pursuant
to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used according to the instructions, may cause harmful interference to radio
communications.
However, there is no guarantee that interference will not occur in a particular installation. If this equipment
does cause harmful interference to radio or television reception, which is found by turning the equipment
off and on, the user is encouraged to try to correct the interference by one or more of the following
measures:
- Reorient or relocate the receiving antenna
- Increase the separation between the equipment and receiver
- Connect the equipment to an outlet other than the receiver's
- Consult a dealer or an experienced radio/TV technician for assistance
RadiationExposure
Statement This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and
your body.
6.4 INDUSTRY CANADA
This Class B digital apparatus complies with Canadian ICES-003, RSS210.
The use of this device in a system operating either partially or completely outdoors may require the user
to obtain a license for the system according to the Canadian regulations.
6.5 Conclusion
The data transfer between wireless dataloggers and radio sensors could be seen as a safe way to
exchange data.
This conclusion is valid as long as the wireless datalogger system is secured against any kind of fraud
from the inside or outside of the company. This security task has to be fulfilled by the company internal IT
department or other related departments.
Further information More information regarding rules and requirements are found at:
http://www.fcc.gov
ETSI standards are found at:
http://www.etsi.org
The CEPT/ERC rec 70-03 are found at:
http://www.ero.dk
The ARIB STD-T66 regulation is found at:
http://www.arib.or.jp/english/index.html
The Australian/New Zealand Standard AS/NZS 4268:2003 are found at:
http://www.standards.org.au

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Revision History
Author Date Version Description
A. Gubler 26.06.2012 -- First edition