E+E Elektronik EE212 User manual

User Manual
Modular Humidity and
Temperature Sensor
EE212

User Manual EE212
Modular Humidity and Temperature Sensor | 2
Content
1 General Information...................................................................................................................................... 3
1.1 Explanation of Warning Notices and Symbols ....................................................................................... 3
1.2 Safety Instructions ................................................................................................................................ 4
1.2.1. General Safety Instructions ......................................................................................................................... 4
1.2.2. Intended Use............................................................................................................................................... 4
1.2.3. Mounting, Start-up and Operation................................................................................................................ 4
1.3 Environmental Aspects.......................................................................................................................... 5
1.4 ESD Protection .................................................................................................................................... 5
2 Scope of Supply ........................................................................................................................................... 5
3 Product Description ..................................................................................................................................... 6
3.1 General................................................................................................................................................. 6
3.2 Dimensions ........................................................................................................................................... 6
3.3 Electrical Connection ............................................................................................................................ 8
3.4 Display.................................................................................................................................................. 9
4 Mounting and Installation .......................................................................................................................... 10
4.1 General............................................................................................................................................... 10
4.2 Outdoor Installation with Radiation Shield........................................................................................... 10
5 Setup and Configuration ............................................................................................................................ 11
5.1 EE-PCS Product Configuration Software ............................................................................................ 12
5.2 RS485 Digital Interface ....................................................................................................................... 14
5.2.1. Hardware Bus Termination ........................................................................................................................ 14
5.2.2. Device Address ......................................................................................................................................... 14
5.2.3. BACnet Protocol Settings .......................................................................................................................... 15
5.2.4. Modbus RTU Protocol Settings.................................................................................................................. 15
5.3 Modbus Register Map ......................................................................................................................... 17
5.4 Modbus RTU Example ........................................................................................................................ 18
6 Maintenance and Service ........................................................................................................................... 19
6.1 Sensing Module Replacement ............................................................................................................ 19
6.2 Filter Cap Exchange ........................................................................................................................... 20
6.3 Display Change................................................................................................................................... 20
6.4 Repairs ............................................................................................................................................... 20
6.5 Spare Parts......................................................................................................................................... 21
7 Technical Data ............................................................................................................................................ 21
8 Conformity .................................................................................................................................................. 23
8.1 Declarations of Conformity.................................................................................................................. 23
8.2 FCC Part 15 Compliance Statement ................................................................................................... 23
8.3 ICES-003 Compliance Statement........................................................................................................ 23

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1 General Information
This user manual serves for ensuring proper handling and optimal functioning of the device. The user manual
shall be read before commissioning the equipment and it shall be provided to all staff involved in transport,
installation, operation, maintenance and repair. E+E Elektronik Ges.m.b.H. does not accept warranty and liability
claims neither upon this publication nor in case of improper treatment of the described products.
This document may contain technical inaccuracies and typographical errors. The content will be revised on a
regular basis. These changes will be implemented in later versions. The described product(s) can be improved
and changed at any time without prior notice.
The user manual may not be used for the purposes of competition without the written consent of E+E Elektronik
Ges.m.b.H. and may not be forwarded to third parties. Copies may be made for internal purposes. All information,
technical data and diagrams included in these instructions are based on the information available at the time of
writing.
PLEASE NOTE
Find this document and further product information on our website at www.epluse.com/ee212.
1.1 Explanation of Warning Notices and Symbols
Safety precautions
Precautionary statements warn of hazards in handling the device and provide information on their prevention.
The safety instruction labeling is classified by hazard severity and is divided into the following groups:
DANGER
Danger indicates hazards for persons. If the safety instruction marked in this way is not followed, the hazard
will verly likely result in severe injury or death.
WARNING
Warning indicates hazards for persons. If the safety instruction marked in this way is not followed, there is a
risk of injury or death.
CAUTION
Caution indicates hazards for persons. If the safety instruction marked in this way is not followed, minor or
moderate injuries may occur.
NOTICE
Notice signals danger to objects or data. If the notice is not observed, damage to property or data may
occur.
Informational notes
Informational notes provide important information which stands out due to its relevance.
INFO
The information symbol indicates tips on handling the device or provides additional information on it. The
information is useful for reaching optimal performance of the device.
The title field can deviate from “INFO” depending on the context. For instance, it may also read “PLEASE
NOTE”.

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1.2 Safety Instructions
1.2.1. General Safety Instructions
NOTICE
Improper handling of the device may result in its damage.
▪ The EE212 enclosure, the sensing probe and the sensing module shall not be exposed to unnecessary
mechanical stress.
▪ Do not apply the supply voltage to the RS485 data lines.
▪ The EE212 electronics is sensitive to electrostatic discharge (ESD), appropriate protective measures shall
be taken when touching it.
▪ Use the EE212 only as intended and observe all technical specifications.
1.2.2. Intended Use
The EE212isanhumidity / temperature(RH / T)sensorfordemandingclimatecontrol,suchasinpharmaceutical
and agricultural industries. It is available for wall or duct mounting as well as outdoor use.
WARNING
Non-compliance with the product documentation may cause safety risk for people and the entire
measurement installation.
The manufacturer cannot be held responsible for damages as a result of incorrect handling, installation, and
maintenance of the device.
▪ Do not use EE212 in explosive atmosphere or for measurement of aggressive gases.
▪ This device is not appropriate for safety, emergency stop or other critical applications where device
malfunction or failure could cause injury to human beings.
▪ The device may not be manipulated with tools other than specifically described in this manual.
NOTICE
Failing to follow the instructions in this user manual may lead to measurement inaccuracy and device
failures.
▪ The EE212 may only be operated under the conditions described in this user manual and within the
specification included in chapter 7 Technical Data.
▪ Unauthorized product modification leads to loss of all warranty claims. Modification may be accomplished
only with an explicit permission of E+E Elektronik Ges.m.b.H.!
1.2.3. Mounting, Start-up and Operation
The EE212 has been produced under state of the art manufacturing conditions, has been thoroughly tested and
has left the factory after fulfilling all safety criteria. The manufacturer has taken all precautions to ensure safe
operation of the device. The user must ensure that the device is set up and installed in a way that does not impair
its safe use. The user is responsible for observing all applicable local and international safety guidelines for
safe installation and operation of the device. This user manual contains information and warnings that must be
observed by the user in order to ensure safe operation.
PLEASE NOTE
The manufacturer or his authorized agent can be only be held liable in case of willful or gross negligence.
In any case, the scope of liability is limited to the corresponding amount of the order issued to the
manufacturer. The manufacturer assumes no liability for damages incurred due to failure to comply with the
applicable regulations, operating instructions or the specified operating conditions. Consequential damages
are excluded from the liability.

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WARNING
Non-compliance with the product documentation may cause accidents, personal injury or property damage.
▪ Mounting, installation, commissioning, start-up, operation and maintenance of the device may be
performed by qualified staff only. Such staff must be authorized by the operator of the facility to carry out
the mentioned activities.
▪ The qualified staff must have read and understood this user manual and must follow the instructions
contained within.
▪ All process and electrical connections shall be thoroughly checked by authorized staff before putting the
device into operation.
▪ Do not install or start-up a device supposed to be faulty. Make sure that such devices are not accidentally
used by marking them clearly as faulty.
▪ A faulty device shall be removed from the process.
▪ Service operations other than described in this user manual may only be performed by the manufacturer.
1.3 Environmental Aspects
PLEASE NOTE
Products from E+E Elektronik Ges.m.b.H. are developed and manufactured in compliance with all relevant
environmental protection requirements. Please observe local regulations for the disposal of the device.
For disposal, the individual components of the device must be separated according to local recycling
regulations. The electronics shall be disposed of correctly as electronics waste.
1.4 ESD Protection
The sensing elements and the electronics board are ESD (electrostatic discharge) sensitive components
of the device and must be handled as such. The failure to do so may damage the device by
electrostatic discharges when touching exposed sensitive components.
2 Scope of Supply
▪ EE212ModularRH / TSensoraccordingtoorderingguide
▪ Mounting flange for duct mount version (Type T2)
▪ Inspection certificate according to DIN EN 10204-3.1
▪ Test report according to DIN EN 10204-2.2
Additionally for EE212 with RS485 interface:
▪ Quick Guide - EE212 RS485 Setup
▪ 1 x cable gland

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3 Product Description
3.1 General
TheEE212isaRH / Tsensorfordemandingapplicationsinclimatecontrol,pharmaceuticalandagricultural
industries. It is available for wall or duct mounting as well as an outdoor version compatible with radiation shield
HA010501 (not included in the scope of supply). Besides measuring RH and T, the sensor calculates the following
humidity related physical quantities:
▪ Absolute humidity
▪ Dew point temperature
▪ Enthalpy
▪ Frostpoint temperature
▪ Mixing ratio
▪ Water vapour partial pressure
▪ Wet bulb temperature
The measured and calculated data is available as analogue output (current or voltage) or on the digital interface
(RS485 with BACnet MS/TP or Modbus RTU protocol).
The pluggable sensing module with rapidX technology can easily be exchanged on-site and even during
operation without switching off the EE212 sensor (hot-swap). Refer to chapter 6.1 Sensing Module Replacement
for details.
For a setup deviating from default, the EE212 can be configured manually by means of the free EE-PCS Product
Configuration Software. Refer to chapter 5 Setup and Configuration for details.
The optional display (available for wall or duct mounting option) features backlight and shows up to 3 measurands
including the symbol of the physical quantity and the measurement unit. The font size automatically adapts to the
number of lines.
3.2 Dimensions
Valuesinmm / inch
Type T1 Type T2
FOR CONDUIT
INSTALLATION
CABLE GLAND M16x1.5
~55
~2.16
Ø 12
Ø 0.47
90
±0.3
3.54
±0.11
46
1.81
5
0.2
80.6
3.17
90
±0.3
3.54
±0.11
Ø > 13
Ø > 0.51
101
3.98
19
0.75
GASKET
Length according to ordering guide
L = filter cap length mm (inch)
Membrane 34 (1.4)
Stainless steel 33 (1.3)
Metal grid 33 (1.3)

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Type T13 Mounting flange
in the scope of supply for type T2
80
37.2
80
55
12
1.5
3.5
3.5
2.2
0.5
L
Ø > 16
Ø > 0.63
6
0.24
60
±0.3
2.36
±0.11
Radiation shield HA010501 for type T13
(needs to be ordered separately)
44 (1.73)
Ø5 (Ø0.2)
20 (0.79)
20 (0.79)
1.5 (0.06)
122 (4.8)
44 (1.73)
Ø105 (Ø4.13)
174 (6.85)
94 (3.7)

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3.3 Electrical Connection
EE212 features screw terminals for connecting the power supply and the outputs. The cables are fed into the
enclosure through the M16 cable gland.
NOTICE
It is important to make sure that the cable glands are closed tightly for the power supply and outputs cable.
This is necessary for assuring the IP rating of the enclosure according to EE212 specification, as well as for
stress relief at the screw terminals on the EE212 board.
WARNING
Incorrect installation, wiring or power supply may cause overheating and therefore personal injuries or
damage to property.
For correct cabling of the device, always observe the presented wiring diagram for the product version used.
The manufacturer cannot be held responsible for personal injuries or damage to property as a result of
incorrect handling, installation, wiring, power supply and maintenance of the device.
20...30 V DC RL<500 Ohm
11...30 V DC RL<50 Ohm
Output: 4-20 mA
OUT1
OUT2
Output: 0-5 V
0-10 V
0-20 mA
15...35 V DC
24 V AC ±20 %
V
mA V
mA
OUT1
OUT2
Output: 0-5 V
0-10 V
15...35 V DC
24 V AC ±20 %
VV
OUT1
OUT2
EE212-A6
EE212-A2/A3
EE212-A2/A31)
EE212-A5
1
2
3
4
5
6
7
1
2
3
4
1
2
3
4
5
5
6
1) When ordered with option D2 (display with backlight)
EE212-J3
Output:
Modbus RTU or
BACnet MS/TP
15...35 V DC
24 V AC ±20 %
8
1
2
3
4
5
6
9

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20...30 V DC RL<500 Ohm
11...30 V DC RL<50 Ohm
Output: 4-20 mA
OUT1
OUT2
Output: 0-5 V
0-10 V
0-20 mA
15...35 V DC
24 V AC ±20 %
V
mA V
mA
OUT1
OUT2
Output: 0-5 V
0-10 V
15...35 V DC
24 V AC ±20 %
VV
OUT1
OUT2
EE212-A6
EE212-A2/A3
EE212-A2/A31)
EE212-A5
1
2
3
4
5
6
7
1
2
3
4
1
2
3
4
5
5
6
1) When ordered with option D2 (display with backlight)
EE212-J3
Output:
Modbus RTU or
BACnet MS/TP
15...35 V DC
24 V AC ±20 %
8
1
2
3
4
5
6
9
Fig. 1 EE212 connection options
No. Function
1
Green LED
Information during operation
On normal operation
Flashing the main board does not recognize the probe’s measurement electronics
Off no power supply or main board failure
2
Blue LED
Information during setup with the optional USB configuration adapter HA011066 and
the EE-PCS Product Configuration Software
On USB connection to PC, no communication with EE-PCS
Flashing communication with EE-PCS in progress
Off no USB connection to PC
3Configuration connector (USB configuration adapter)
4FFC cable socket for the display
5Screw terminals for power supply and outputs
6Screw terminals, do not connect
7Outputsignal(I / U)selection
8Busterminationresistor120Ω(jumper)
9Address DIP switch for RS485 interface
Tab. 1 Parts of the EE212 electronics board types
3.4 Display
The optional display is available for wall mount (T1) and duct mount (T2) types. Per factory setup the display
shows the two measurands selected for output 1 and output 2 for analogue versions (according to ordering code).
For digital output versions the display shows RH and T.
The user can change the display layout to 1, 2 or 3 lines and select the parameters to be displayed. Refer to
chapter 5 Setup and Configuration for details.
PLEASE NOTE
The display is available as spare part, intended for replacement only, not for retrofitting an EE212 originally
ordered without display.
PLEASE NOTE
The EE212 (4 - 20 mA, 2-wire version) with display operates correctly only if both outputs are connected.

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4 Mounting and Installation
4.1 General
For mounting, the cable gland (in the scope of supply) onto the EE212 enclosure use a matching wrench.
When using EE212 with conduit connection for the North American market use a flat screwdriver to knock open
the blind at the top of the enclosure, carefully. Take good care to avoid damaging the electronics inside the
enclosure. The conduit adapter is not included in the scope of supply. The M16x1.5 opening for the cable gland
shall be tightly closed using the blind plug included in the scope of supply (see also chapter 3.2 Dimensions).
For best measurement results, the EE212
▪ must be installed in an environment where the medium to be measured flows sufficiently around the probe.
▪ shall not be placed near influencing objects such as heating radiators or fan heaters. See also mounting
positions of the radiation shield for Type T13.
▪ selfheatingeffectsarecompensated.ForTypeT13theaccuraciesarevalidat24VDCand250Ωload
resistance for A6 versions.
4.2 Outdoor Installation with Radiation Shield
EE212-T13xxx (outdoor type) can be installed with a radiation shield (ordrer code HA010501). Choose an
appropriate place to mount the sensor observing the general mounting instructions and recommended mounting
positions of the radiation shield.
Fig. 2
> 1m
L1
B1 < L1
L2
B2 < L2
N
N.W AB C
Mounting position
Follow these steps to mount the EE212 in the radiation shield (see Fig. 3):
1. Drill the holes according to the mounting template (see chapter 3.2 Dimensions) and mount the radiation
shield in a vertical position using the screws and dowels (included in the scope of supply).
2. Fix the EE212 on the mounting plate with four M4x10 screws (included in the scope of supply).
3. Insert the EE212 in the radiation shield and fix the mounting plate with two M4x10 screws on the radiation
shield (included in the scope of supply).
4. Connect the power supply and the analogue outputs. Close the cover of the EE212 sensor.

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Fig. 3
2 pcs.
wallplug S6 (Fischer)
2 pcs.
4,2 x 38 BN695
4 pcs.
M4 x 10
2 pcs.
M4 x 10
44 mm
Ø 6 mm
1
3
2
4
Mounting instruction
5 Setup and Configuration
The EE212 is ready to use and does not require any configuration by the user. The factory setup of EE212
corresponds to the type number ordered. Please refer to the datasheet at www.epluse.com/ee212. If needed, the
user can change the factory setup with the help of the free EE-PCS Product Configuration Software and the USB
configuration adapter (HA011066).
The user can change the display settings and the output configuration. Refer to chapter 5.1 for details.
NOTICE
The EE212 may not be connected to any additional power supply when using the USB configuration adapter
HA011066.
PC
HA011066
Fig. 4 EE212 connected to a PC running EE-PCS

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5.1 EE-PCS Product Configuration Software
To use the software for performing adjustments and changes in settings, please proceed as follows:
1. Download the EE-PCS Product Configuration Software from www.epluse.com/configurator and install it on the
PC.
2. Connect the E+E device to the PC using the USB configuration adapter.
3. Start the EE-PCS software.
4. Follow the instructions on the EE-PCS opening page for scanning the ports and identifying the connected
device.
5. Click on the desired setup or adjustment mode from the main EE-PCS menu on the left and follow the online
instructions of the EE-PCS
Analogue output configuration options:
▪ Measurand assignment
▪ Current and/or voltage scaling
▪ Unit selection
▪ Output value fixing (measured value or current/voltage value)
Fig. 5 EE212 with current or voltage output (selectable)

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Fig. 6 EE212 with current output
Digital output configuration options:
▪ Address
▪ Baud rate
▪ Parity
▪ Stop bits
Fig. 7 EE212 digital interface communication settings

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Display configuration options:
▪ Display layout
▪ Measurand selection
▪ Display appearance (backlight, brightness, contrast)
Fig. 8 EE212 display configuration
5.2 RS485 Digital Interface
5.2.1. Hardware Bus Termination
ForbusterminationEE212featuresaninternal120Ωresistorwhichcanbeactivatedusingthejumperonthe
electronics board (see also chapter 3.3 Electrical Connection for details).
▪ Jumper not mounted (right position = factory setup): bus is not terminated
▪ Jumper mounted (left position): bus is terminated
5.2.2. Device Address
Address Switch
Address setting via EE-PCS Product Configuration Software
AllDIPswitchesatposition0→addresshastobesetviaEE-PCS
Modbus (slave device): factory setting 46 (permitted values: 1…247).
BACnet (master device): factory setting 46 (permitted values: 1…127).
Example: Address is set via configuration software = factory setting.
00000000
0
1

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Address Switch
Address setting via DIP switch
Modbus (slave device): Setting the DIP switches to any other address than 0,
overrules the Modbus address set via EE-PCS
(permitted values: 1…247).
BACnet (master device): Setting the DIP switches to any other address than
0, overrules the BACnet address set via configuration software. BACnet Note:
permitted values are 0…127. The 8th bit of the DIP switches is ignored (ID 127
= 0111 111). To set address 0 via DIP switches, the 8th bit shall be set to 1 (ID
0 = 1000 0000).
Example: Address set to 11 (= 0000 1011 binary).
11010000
0
1
5.2.3. BACnet Protocol Settings
Factory settings User selectable values (via EE-PCS)
Baud rate As per type number ordered 9 600,19 200,38 400,57 600,76 800,115 200
Data bits 8 8
Parity None None
Stop bits 1 1
BACnet address 46 0…127
Tab. 2 BACnet protocol settings
PLEASE NOTE
TherecommendedsettingsformultipledevicesinaBACnetMS/TPnetworkare38 400,8,none,1.
The EE212 PICS (Product Implementation Conformance Statement) is available on the E+E website at
www.epluse.com/ee212.
BACnet address and baud rate can be set via:
▪ EE-PCS Product Configuration Software and the USB configuration adapter HA011066.
▪ BACnet protocol, see the PICS.
5.2.4. Modbus RTU Protocol Settings
Factory settings User selectable values (via EE-PCS)
Baud rate As per type number ordered 9 600,19 200,38 400,57 600,76 800,115 200
Data bits 8 8
Parity Even None, odd, even
Stop bits 11, 2
Modbus address 46 1...247
Tab. 3 Modbus RTU protocol settings
PLEASE NOTE
The recommended settings for multiple devices in a Modbus RTU network are 9600, 8, even, 1.

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Device address, baud rate, parity and stop bits can be set via:
▪ EE-PCS Product Configuration Software and the USB configuration adapter HA011066.
The EE-PCS can be downloaded free of charge from www.epluse.com/configurator.
▪ Modbus protocol in the register 1 (0x00) and 2 (0x01).
See Application Note Modbus AN0103 (available at www.epluse.com/ee212).
The serial number as ASCII-code is located in read-only registers 1 - 8 (0x00 - 0x07, 16 bits per address).
The firmware version is located in register 9 (0x08) (bit 15...8 = major release; bit 7...0 = minor release). The
sensor name is located in register address 10 (0x09).
NOTICE
When reading the serial number or the sensor name, it is always necessary to read all 8 registers, even if the
desired information requires less.
NOTICE
For obtaining the correct floating point values, both registers have to be read within the same reading
cycle. The measured value can change between two Modbus requests, exponent and mantissa may get
inconsistent then.
Communication settings (INT16)
Parameter Register number1) [Dec] Register address2) [Hex]
Write register: function code 0x06
Modbus address 10x00
Modbus protocol settings3) 20x01
Device information (INT16)
Parameter Register number1) [Dec] Register address2) [Hex]
Read register: function code 0x03 / 0x04
Serial number (as ASCII) 1 0x00
Firmware version 9 0x08
Sensor name 10 0x09
1) Register number starts from 1.
2) Protocol address starts from 0.
3) For Modbus protocol settings see Application Note Modbus AN0103 (available at www.epluse.com/ee212).
Tab. 4 EE212 registers for device setup

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5.3 Modbus Register Map
The measured data is saved as a 32 bit floating point values (data type FLOAT32) and as 16 bit signed integer
values (data type INT16).
FLOAT 32
Parameter Unit1) Register number2) [DEC] Protocol address3) [HEX]
Read register: function code 0x03 / 0x04
Temperature °C, °F 26 0x19
Relative humidity %28 0x1B
Water vapour partial pressure mbar, psi 30 0x1D
Dew point temperature °C, °F 32 0x1F
Wet bulb temperature °C, °F 34 0x21
Absolute humidity g/m3, gr/ft336 0x23
Mixing ratio g/kg, gr/lb 38 0x25
Specific enthalpy kJ/kg,BTU/lb 40 0x27
Frost point temperature °C, °F 42 0x29
INT16
Parameter Unit1) Scale4) Register number2) [DEC] Protocol address3)
[HEX]
Read register: function code 0x03 / 0x04
Temperature °C, °F 100 301 0x12C
Relative humidity %100 302 0x12D
Water vapour partial pressure mbar, psi 100 303 0x12E
Dew point temperature °C, °F 100 304 0x12F
Wet bulb temperature °C, °F 100 305 0x130
Absolute humidity g/m3, gr/ft3100 306 0x131
Mixing ratio g/kg, gr/lb 100 307 0x132
Specific enthalpy kJ/kg,BTU/lb 100 308 0x133
Frost point temperature °C, °F 100 309 0x134
1) The choice of measurement units (metric or non-metric) must be done according to the ordering guide, see EE212 datasheet.
Switching from metric to non-metric or vice versa by using the EE-PCS is not possible.
2) Register number starts from 1
3) Register address starts from 0
4) Examples: For scale 100, the reading of 2550 means a value of 25.5. For scale 50, the reading of 2550 means a value of 51.
Tab. 5 EE212 FLOAT32 and INT16 measured data registers

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5.4 Modbus RTU Example
The EE212’s Modbus address is 46 [0x2E].
Please refer to
▪ MODBUS APPLICATION PROTOCOL SPECIFICATION V1.1b3, chapter 6:
www.modbus.org/docs/Modbus_Application_Protocol_V1_1b3.pdf
▪ E+E Application Note Modbus AN0103 (available at www.epluse.com/ee212)
Read the temperature (FLOAT32) T = 25.087642669677734375 °C from register address 0x19:
Master (e.g. PLC) EE212
Request [Hex]:
Modbus
address
Function
code
Starting
address Hi
Starting
address Lo
Qty. of
registers Hi
Qty. of
registers Lo CRC
2E 03 00 19 00 02 12 53
Response [Hex]:
Modbus
address
Function
code
Byte
count
Register 1
value Hi
Register 1
value Lo
Register 2
value Hi
Register 2
value Lo CRC
2E 03 04 B3 7E 41 C8 53 AB
Tab. 6 Example temperature query
Decoding of floating point values:
Floating point values are stored according to IEEE754. The byte pairs 1, 2 and 3, 4 are transformed as follows
(numbers taken from T reading Modbus request/response example above):
Modbus response [Hex]
Byte 3 Byte 4 Byte 1 Byte 2
B3 7E 41 C8
MMMMMMMM MMMMMMMM SEEEEEEE EMMMMMMM
Tab. 7 Modbus response
IEEE754
Byte 1 Byte 2 Byte 3 Byte 4
41 C8 B3 7E
0100 0001 1100 1000 1011 0011 0111 1110
SEEE EEEE EMMM MMMM MMMM MMMM MMMM MMMM
Decimal value: 25.087642669677734375
Tab. 8 Data representation according to IEEE754

User Manual EE212
Modular Humidity and Temperature Sensor | 19
6 Maintenance and Service
6.1 Sensing Module Replacement
If needed, the EE212M sensing module can be replaced by a new one. Please refer to chapter 6.5 Spare Parts
for the order code.
The sensing module with rapidX technology allows a fast and tool-free exchange even during operation. There is
no need to switch off the EE212 for this purpose (hot-swap).
PLEASE NOTE
Extreme working conditions such as highly polluted, aggressive and chemically contaminated environment
might require periodical maintenance of the device. The maintenance is facilitated by the modular design.
The sensing module replacement under above conditions represents a standard maintenance operation,
whereby the sensing module is a wear component. A possible measurement drift or the failure of the sensing
module caused by harsh working environment are excluded from any warranty claims.
PLEASE NOTE
For a newly ordered EE212M sensing module the inspection certificate according to DIN EN 10204-3.1 is
available online only from https://certificates.epluse.com. The serial number is lasered onto the module as a
2D bar code. Please refer to Fig. 9.
Fig. 9 Location of EE212M serial number 2D bar code
Fig. 10 EE212 modular construction

User Manual EE212
Modular Humidity and Temperature Sensor | 20
Procedure:
1. Remove the filter cap by turning it counter-clockwise.
2. Remove the sensing module by pulling it straight out from the probe.
3. Plug the new EE212M sensing module into the output unit.
4. Screw the filter cap fingertight onto the probe.
NOTICE
For EE212 sensors using EE212M sensing modules purchased before 31 March 2023, the EE212 supply
must be switched off before connecting or disconnecting the sensing module. After an EE212 sensor was
successfully equipped with a hot-swap capable EE212M module (purchased after 31 March 2023), further
replacement is allowed during operation without switching off the EE212 sensor (hot-swap).
6.2 Filter Cap Exchange
In a dusty, polluted environment it might be necessary to replace the filter cap once in a while. In most of
the cases, a clogged filter shows visible contamination or dirt. Longer response time of the measurement
also indicates a clogged filter cap. In such cases, replace the filter by a new, original one, see datasheet
“Accessories”.
Procedure:
1. Turn the filter cap counter-clockwise for removing it.
2. Install the new filter cap fingertight by turning it clockwise.
6.3 Display Change
Fig. 11 Display and FFC cable connection on the EE212 electronics board
When connecting the display’s FFC cable to the EE212 electronics board, please observe the correct orientation.
The blue cable stiffener needs to be on the left side as shown in Fig. 11.
NOTICE
Disconnecting or connecting the display while the EE212 is powered may cause damages to EE212 and to
the display.
Always switch off the EE212 before exchanging the display
6.4 Repairs
Repairs may be carried out by the manufacturer only. The attempt of unauthorized repair excludes any warranty
claims.