E+E Elektronik EE680 User manual

BA_EE680 // v1.0 // Modification rights reserved
User Manual
EE680
Air Velocity and Temperature Sensor
for Laminar Flow

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.
The 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 products can be improved and changed
at any time without prior notice.
© Copyright E+E Elektronik Ges.m.b.H. All rights reserved.
EMC note USA (FCC):
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15
of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when
the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his own expense.
EMC note Canada (ICES-003):
CAN ICES-3 (A) / NMB-3 (A)

CONTENT
1 General .................................................................................................................................................4
1.1 Explanation of Symbols.................................................................................................................................4
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........................................................................................................................5
1.3 Environmental Aspects..................................................................................................................................5
2 Scope of Supply ..................................................................................................................................5
3 Product Description ............................................................................................................................5
3.1 General..........................................................................................................................................................5
3.2 Dimensions....................................................................................................................................................6
3.3 Electrical Connection.....................................................................................................................................7
4 Probe Mounting ...................................................................................................................................8
5 Setup and Configuration ....................................................................................................................9
5.1 EE-PCS Product Configuration Software ....................................................................................................10
5.2 Digital Interface RS485 with Modbus RTU Protocol....................................................................................10
5.3 Modbus Register Map .................................................................................................................................10
5.4 Sensor Configuration with the EE-PCS.......................................................................................................11
5.4.1 Analogue Outputs .............................................................................................................................................. 11
5.4.2 Lower Limit for the Air Velocity Measurement.................................................................................................... 12
5.4.3 Reference Values for the Standardized Air Velocity...........................................................................................12
5.4.4 Digital Interface Configuration............................................................................................................................13
5.4.5 Selection between Analogue and Digital Output................................................................................................ 13
5.4.6 Optical Status Indication for Probe and Laminar Flow.......................................................................................14
6 vn / T Adjustment and Calibration ...................................................................................................16
6.1 Selecting the Appropriate Adjustment Method ............................................................................................16
6.1.1 General Information on 1-Point vn/T Adjustment: .............................................................................................. 16
6.1.2 General Information on 2-Point vn/T Adjustment: .............................................................................................. 16
6.2 Velocity Adjustment .....................................................................................................................................17
6.3 Temperature Adjustment .............................................................................................................................19
6.4 Resetting to Factory Adjustment .................................................................................................................20
6.5 Calibration and Adjustment at E+E Elektronik.............................................................................................20
7 Maintenance and Service .................................................................................................................20
7.1 Cleaning ......................................................................................................................................................20
7.2 Transportation .............................................................................................................................................21
7.3 Repairs ........................................................................................................................................................21
7.4 Error Indication on the Analogue Output (NAMUR).....................................................................................21
7.5 Error Indication on the EE-PCS...................................................................................................................21
8 Accessories .......................................................................................................................................22
9 Technical Data ...................................................................................................................................23

4User Manual EE680 Air Velocity and Temperature Sensor for Laminar Flow
1 General
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. The user manual may not be used for the
purposes of competition without the written consent of E+E Elektronik 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.
Disclaimer
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.
1.1 Explanation of Symbols
This symbol indicates safety information.
It is essential that all safety information is strictly observed. Failure to comply with this information can
lead to personal injuries or damage to property. E+E Elektronik assumes no liability if this happens.
This symbol indicates instructions.
The instructions shall be observed in order to reach optimal performance of the device.
1.2 Safety Instructions
1.2.1 General Safety Instructions
The probe shall not be exposed to unnecessary mechanical stress.
The sensing element is sensitive to electrostatic discharge (ESD), avoid touching the sensing
element whenever possible, appropriate protective measures should be taken when touching it.
Installation, electrical connection, maintenance and commissioning shall be performed by qualified
personnel only.
Use the EE680 only as intended and observe all technical specifications.
Do not use EE680 in explosive atmosphere or for measurement of aggressive gases.
Do not apply the nominal voltage to the RS485 data lines.
This device is not appropriate for safety, emergency stop or other critical applications where device
malfunction or failure could cause injury to human beings.
1.2.2 Intended Use
The EE680 is intended for monitoring laminar flows fulfilling highest requirements for the use in GMP
Grade A and B or ISO class 5 clean rooms and above. It measures the standardized air velocity (vn)
and the temperature (T) highly accurate. Its GMP-compliant design makes it the ideal solution for
branches like microelectronics, pharmaceutical industry and other life science fields. The EE680 is
not designed for outdoor applications. It is suitable for use in clean gases (air) free from oils, residue-
forming substances or abrasive particles.
The use of the EE680 in any other way than described in this manual bears a safety risk for people and
the entire measurement installation and is therefore not allowed.
The manufacturer cannot be hold responsible for damages as a result of incorrect handling, installation,
and maintenance of the equipment.
In order to avoid damage to the instrument or health hazards, the measuring equipment must never be
manipulated with tools that are not specifically described in this manual.
The sensor may only be utilized in accordance with the conditions defined in the technical data.
Otherwise, measurement inaccuracies will occur and equipment failures cannot be ruled out.

5
User Manual EE680 Air Velocity and Temperature Sensor for Laminar Flow
The steps recommended by the manufacturer for installation, inspections and maintenance work must
be observed and carried out for the safety of the user and for the functionality of the equipment.
Unauthorized product modification leads to loss of all warranty claims. This may be accomplished only
with an explicit permission of E+E Elektronik!
1.2.3 Mounting, Start-up and Operation
The EE680 air velocity and temperature sensor for laminar flow 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 manner that does not have a negative
effect on its safe use. The user is responsible for observing all applicable safety guidelines, local and
international, with respect to safe installation and operation on the device. This user manual contains
information and warnings that must be observed by the user in order to ensure safe operation.
Mounting, 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 may only be investigated and possibly repaired by qualified, trained and authorized
staff. If the fault cannot be fixed, the 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
Products from E+E Elektronik are developed and manufactured in compliance with all relevant
environmental protection requirements. Please observe local regulations for the device disposal.
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.
2 Scope of Supply
EE680 – Air Velocity and Temperature Sensor for Laminar Flow (with protection cap)
EE680 stainless steel mounting flange
Inspection certificate according to DIN EN 10204-3.1
Quick guide
3 Product Description
3.1 General
The EE680 probe is optimized for highly accurate and reliable standardized air velocity (vn) and
temperature (T) measurement in GMP Grade A and B or ISO class 5 clean rooms and above. Its GMP
compliant design makes it the ideal probe for laminar flow monitoring in clean rooms with the highest
requirements. The probe is suitable for air velocity measurement down to 0.1 m/s (20 ft/min).
The EE680 is available as straight and angled version with various probe lengths. All variants provide
an optical status indication - see chapter 5.4.6.
The probe employs an E+E thin-film sensing element with excellent accuracy, long term stability and
low angular dependency. The E+E proprietary coating protects the sensing element against H2O2
sterilization processes and corrosive cleaning agents.

6User Manual EE680 Air Velocity and Temperature Sensor for Laminar Flow
The air velocity and temperature measured data is available as current or voltage analogue output or
on the RS485 interface with Modbus RTU protocol. The analogue output and other settings can be
configured with the EE-PCS.
3.2 Dimensions
L according to ordering code
9.7 (0.4)
Ø 8
(0.3)
89 (3.5)
12
(0.47)
M12x1
Ø 25 (0.3)
Fig. 1 EE680 straight probe, dimensions in mm (inch)
M12x1
9.7 (0.4)
Ø 8
(0.3)
89 (3.5)
12
(0.47)
Ø 25
(0.3)
300 (11.8)
300 (11.8)
Fig. 2 EE680 angled probe, dimensions in mm (inch)

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User Manual EE680 Air Velocity and Temperature Sensor for Laminar Flow
Ø 5.5
(0.22)
30 (1.2) 5
(0.2)
15
(0.6)
Ø 18...20 (0.71...0.79) drilling diameter
40 (1.6)
56 (2.2)
Fig. 3 Mounting flange for EE680, dimensions in mm (inch)
3.3 Electrical Connection
Pin number Function Wire colors for accessories:
- Flange coupling HA010705
- Connection cable HA010819/820/821
1Supply voltage
24 V DC +/- 20% (Class III) brown
2Analogue out 2 or RS485 (D-), Data white
3GND blue
4Analogue out 1 or RS485 (D+), Clock black
5Conguration pin gray
mA
2
4
5
1
3
V
+
-
Voltage output
Current output
GND analogue output
Power supply 10 - 35 V DC*
GND
front view
1 2
34
5
*The supply circuit must be fused with ≤8A
front view
M12 device plug
Tab. 1 EE680 pin assignment
To meet the EMC Directive 2004/108/EC a shielded connection cable must be used.

8User Manual EE680 Air Velocity and Temperature Sensor for Laminar Flow
4 Probe Mounting
The EE680 can be mounted on walls, ceilings or inside safety workbenches. Fig. 4 and Fig. 5 show the
principal probe mounting alternatives, depending on the probe type.
Fig. 4 EE680 mounting on a wall
Fig. 5 EE680 mounting on a ceiling
The stainless steel mounting flange allows for the probe to be mounted on a wall or inside a safety
workbench.
After fastening the flange, feed the connection cable through the flange for connecting it with the
sensor. For convenient handling, the cable should extend 5 cm (2 in) from the flange and there should
be enough space for it behind the flange. Connect the sensor with the M12 connector. Insert the sensor
into the flange and adjust the sensor position for parallelism of the sensing element and the air flow.
Finally, fasten the sensor with the imbus screw in the flange.
For facilitating sheet metal wall mounting, there is a mounting set available as accessory (HA011601)
consisting of counter plate, sealing and screws.See Fig. 7.
In case of site cleaning, remove the sensor and protect the electrical connection with the help of the
sealing plug which is avalable as accessory (HA011602). See Fig. 8
Remove the sensor protection cap before commissioning.

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User Manual EE680 Air Velocity and Temperature Sensor for Laminar Flow
Flow direction
For best measuring accuracy the sensing element of the EE680 must be aligned exactly in the direction
of the laminar flow in which factory adjustment took place.
An arrow symbol on the sensor tip indicates factory adjustment direction. The arrow on the sensor
probe should be pointing exactly in the direction of the laminar air flow.
The angular deviation must be kept to a minimum.
Fig. 6 Correct laminar flow alignment
Fig. 7 EE680 mounting flange and mounting set (HA011601)
Fig. 8 EE680 mounting flange and sealing plug (HA011602)
5 Setup and Configuration
The EE680 is ready to use and does not require any configuration by the user. The EE680 factory setup
corresponds to the type number ordered. Please refer to the data sheet at www.epluse.com/EE680. The
user can change the factory setup with the help of the EE-PCS Product Configuration Software and the
Modbus configuration adapter (order code HA011018).
Besides the measurand selection of the analogue and digital outputs and their scaling, the digital
interface settings may be changed. The RH and T measurement is offset and 2-point adjustable. It is
possible to enable or disable the optical status indication and the NAMUR error indication (factory setting:
disabled). Temperature and barometric pressure reference values for standardized air velocity calculation
can be set.
Please note: The EE680 may not be connected to any additional power supply when using the Modbus
configuration adapter HA011018.
PC
Fig. 9 EE680 configuration and adjustment

10 User Manual EE680 Air Velocity and Temperature Sensor for Laminar Flow
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 EE680 to the PC using the Modbus 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
5.2 Digital Interface RS485 with Modbus RTU Protocol
Item Factory settings Selectable values (via EE-PCS)
Baud rate 9 600 9 600, 19 200, 38 400, 57 600, 76 800, 115 200
Data bits 8 8
Parity Even None, odd, even
Stop bits 1 1, 2
Slave address 68 1...247
Tab. 2 Digital interface default settings
The recommended settings for multiple devices in a Modbus RTU network are 9600, 8, even, 1.
The EE680 represents 1 unit load on an RS485 network.
Device address, baud rate, parity and stop bits can be set via:
1. EE-PCS Product Configuration Software, the Modbus configuration adapter HA011018.
The EE-PCS can be downloaded free of charge from www.epluse.com/Configurator
Please refer also to chapter 5.4.4
2. Modbus protocol in the register 60001 (0x00) and 60002 (0x01).
See Modbus Application Note AN0103 (available at www.epluse.com/EE680)
The serial number as ASCII-code is located in the register addresses 0x00...0x07 (16 bits per address).
The firmware version is located in the register address 0x08 (bits 15...8 = major release; bits 7...0 =
minor release). The sensor name is located in register address 0x09. The beforementioned registers can
be read out with function code 0x03 or 0x04.
Please note: 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.
Please note: 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, therefore,
exponent and mantissa may get inconsistent.
Communication settings (INTEGER 16 bit)
Parameter Register number1) [DEC] Protocol address2) [HEX]
Write register: function code 0x06
Slave ID (Modbus address) 1 0x00
Modbus protocol settings3) 2 0x01
Device information (INTEGER 16 bit)
Parameter Register number1) [DEC] Protocol 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/EE680).

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User Manual EE680 Air Velocity and Temperature Sensor for Laminar Flow
5.3 Modbus Register Map
The measured data is saved as a 32 bit floating point values (data type FLOAT) and as 16 bit signed
integer values (data type INTEGER).
INTEGER 16 bit:
Parameter Unit Scale4) Register number1) [Dec] Register address2) [HEX]
Read register: function code 0x03 / 0x04
Air velocity vn3)
m/s 100 4023 0xFB6
ft/min 0.1 4024 0xFB7
Temperature T °C 100 4002 0xFA1
°F 50 4003 0xFA2
FLOAT 32 bit:
Parameter name Unit Register number1) [Dec] Register address2) [HEX]
Read register: function code 0x03 / 0x04
Air velocity vn3)
m/s 1045 0x414
ft/min 1047 0x416
Temperature T °C 1003 0x3EA
°F 1005 0x3EC
1) Regi󰀬er number 󰀬arts from 1
2) Regi󰀬er address 󰀬arts from 0
3) Standardized air velocity vn at 󰀬andard conditions (factory setup): Tn = 23 °C (73 °F), pn = 1 013.25 hPa (14.7 psi), settable via EE-PCS
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.
5.4 Sensor Configuration with the EE-PCS
5.4.1 Analogue Outputs
Menu Item Configurable Items
Outputs Selection between current and voltage output
Selection of scaling, measurand and error indication
Fig. 10 Configuration of analogue outputs
Both outputs are either voltage or current at the same time, a change in one output automatically
changes the other one. Measurand selction, unit selection and scaling of the measured value are done
here.
The probe can be configured to simulate an arbitrary reference value by checking one of the “Fixed
value” boxes and entering the required value.
The NAMUR error indication can be changed. It is enabled by factory default.

12 User Manual EE680 Air Velocity and Temperature Sensor for Laminar Flow
5.4.2 Lower Limit for the Air Velocity Measurement
Menu Item Configurable Items
Low-flow cut-off Conditions for switching off and on measurement at low air velocity
Fig. 11 Value setting for low-flow cut-off
The Low-flow cut-off can be switched on or off and the threshold together with a hysteresis value can
be defined. Measurement of the standardized air velocity is stopped below the “switch off” value and
resumed as soon as the “switch off” value plus the hysteresis is exceeded.
5.4.3 Reference Values for the Standardized Air Velocity
Menu Item Configurable Items
Process parameters Temperature and barometric pressure reference values for standardized air velocity
calculation
Fig. 12 Standard reference values setting
For the measurement of the standardized air velocity, the EE680 uses the temperature and barometric
pressure values defined in this section. The factory settings are 23 °C (73 °F) and 1 013.25 hPa (14.7 psi).

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User Manual EE680 Air Velocity and Temperature Sensor for Laminar Flow
5.4.4 Digital Interface Configuration
Menu Item Configurable Items
Interface settings RS485 interface parameters incl. device ID
Fig. 13 Digital interface settings
The interface parameters for Modbus communication can be changed. Fig. 13 shows the recommended
values, they are set in the factory.
5.4.5 Selection between Analogue and Digital Output
Menu Item Configurable Items
Output mode Selection between analogue and digital output
Fig. 14 Analogue/digital output selection
Select from analogue and digital output. Please observe the information provided.

14 User Manual EE680 Air Velocity and Temperature Sensor for Laminar Flow
5.4.6 Optical Status Indication for Probe and Laminar Flow
Menu Item Configurable Items
Optical status
indication
Status indication active or inactive
Selection between error indication and laminar flow status
Fig. 15 Selection of optical status indication mode
The status of the laminar flow and the probe is indicated optically by the LED ring embedded in the
probe body. The user can adjust the behaviour of the optical status indication and choose from the
following options:
Status indication is active / inactive
If active, two status indication modes are selectable :
Error indication - probe status: normal operation (GREEN)/ failure (RED FLASHING)
Laminar flow status: measurand within (GREEN) /out of a given range (YELLOW FLASHING)
+Error indication - probe status: normal operation (GREEN)/ failure (RED FLASHING)
The table below summarizes the meaning of LED indication:
Colour Function / Failure
None No suitable supply, status indication disabled
GREEN Probe status: normal operation, no failure
Laminar ow status: measured value in range
YELLOW FLASHING Probe status: normal operation, no failure
Laminar ow status: measured value out of range
RED FLASHING Probe status: failure, return sensor for investigation
Tab. 3 Meaning of LED ring light characteristics
The laminar flow status is monitored with the help of one of the measurands and an associated value
range. On delivery, the EE680 monitors the standardized air velocity using the factory preset values
according to Tab. 4. Via the EE-PCS, the standardized air velocity vn or the temperature can be
selected for monitoring together with the according range upper and lower limit (refer to Fig. 16). In this
mode, the status indication shows both, the flow status and the probe status. In case of a probe failure,
the RED FLASHING overrides the flow status indication.
Please note: Setting the parameters for laminar flow monitoring is independent of activation of the
optical status indication. See Fig. 16: The parameters come into effect as soon as the optical status
indication is turned on.

15
User Manual EE680 Air Velocity and Temperature Sensor for Laminar Flow
Fig. 16 Laminar flow monitoring parameter setting
Measurand Value
Standardized air velocity vn 0.45 m/s 88.6 ft/min
Range ±20 %
Range lower limit 0.36 m/s 70.9 ft/min
Range upper limit 0.54 m/s 106.3 ft/min
Tab. 4 Factory default values for laminar flow monitoring
Fig. 17 Response time setting
The fastest response time possible is 1.5 s with averaging over 1 value. Averaging over n measurement
values corresponds to a response time of n seconds. The vn measurement response time t90 can be
changed in the range between 1.5 and 40 s. The factory setting is 1.5 s.

16 User Manual EE680 Air Velocity and Temperature Sensor for Laminar Flow
6 vn / T Adjustment and Calibration
The EE680 can be calibrated / adjusted with the help of the EE-PCS. For this purpose, the probe needs
to be connected to a PC via a Modbus configuration adapter.
Definitions
■Calibration documents the accuracy of a measurement device. The device under test (specimen) is
compared with the reference and the deviations are documented in a calibration certificate. During
the calibration, the specimen is not changed or improved in any way.
■Adjustment improves the measurement accuracy of a device. The specimen is compared with the
reference and brought in line with it. An adjustment can be followed by a calibration which documents
the accuracy of the adjusted specimen.
Please note: To achieve comparable results to the E+E factory setting, please observe the following
instructions:
a) The adjustment should be done in a wind tunnel with homogeneous, low turbulent flow profile.
b) Insert the probe 10 cm (4") deep into the flow channel.
c) The fixtures should be mounted outside the flow channel and should not rise into the air stream
6.1 Selecting the Appropriate Adjustment Method
The EE680 can be adjusted in 2 different ways:
■1-point vn/T adjustment:
Quick and easy option for obtaining precise measuring results at a specific working point.
1-point adjustment should only be used for very limited working ranges.
■2-point vn/T adjustment:
With 2-point adjustment, precise measuring results can be obtained over the entire vn/T measuring
range. The more complicated 2-point adjustment procedure is preferable to 1 point adjustment, if
higher precision or a wider working range is required.
6.1.1 General Information on 1-Point vn/T Adjustment:
If possible the selected adjustment point should be similar to the working point (of the limited working
range) of the sensor.
Example: Working range vn 0...2 m/s (0...400 ft/min) adjustment point at 1.0 m/s (200 ft/min); working
range T 18...22°C (64.4...71.6°F) adjustment point at 20°C (68°F).
6.1.2 General Information on 2-Point vn/T Adjustment:
With 2-point adjustment, vn/T adjustment is performed at 2 different adjustment points.
To ensure the smallest possible deviation in measuring results over the entire measuring range, the two
adjustment points should be selected as follows:
■The low adjustment point should be in the lower third of the measuring range.
Adjustment shall be performed using the “Low“ point in the drop-down.
■The high adjustment point should be in the upper third of the measuring range.
Adjustment shall be performed using the “High“ point in the drop-down.
■There is also an “Auto“ option for adjustment point selection. This option means that the smaller
value will automatically be taken as the low adjustment point and the bigger value as the high one.
Example: EE680 - measuring range = 0...2 m/s (0...400 ft/min).
Low adjustment point (V-CAL LOW) should be around 0.4 m/s (0...0.7 m/s) / 79 ft/min (0...138 ft/min).
High adjustment point (V-CAL HIGH) should be around 1.8 m/s (1.4...2 m/s) / 354 ft/min (276...400 ft/min).

17
User Manual EE680 Air Velocity and Temperature Sensor for Laminar Flow
6.2 Velocity Adjustment
Fig. 18 vn 1-point adjustment
Measurands
Air Velocity1)
Measuring range 0...2 m/s (0...400 ft/min)
Accuracy2) 0.1...2 m/s (20...400 ft/min): ± (0.5 % of mv + 0.05 m/s)
in air at 23 °C (73 °F) and 1 013 hPA (14.7 psi) mv = measured value
Dependence of inflow angle < 3 % for α < 20°
Dependence of inflow direction < 3 %
Response time t90, typ. < 1.5...40 s (Factory setting: 1.5 s, configurable via EE-PCS)
Temperature
Measuring range -20...70 °C (-4...158 °F)
Accuracy2) ± 0.5 °C (± 0.9 °F)
in air at 23 °C (73 °F)
Response time t90, typ. 10 s
Outputs
Analogue 0 - 5 V / 0 - 10 V -1 mA < IL< 1 mA
0 - 20 mA / 4 - 20 mA (3-wire) Load resistance ≤ 350 Ω
Digital interface RS485 (EE680 = 1 unit load)
Protocol Modbus RTU
Default settings Baud rate 9 600, parity even, stop bits 1, slave ID 68
General
Supply voltage 24 V DC ± 20 %
Current consumption, typ. < 30 mA
Electrical connection M12x1, 5 poles, stainless steel 1.4404
Protection rating IP65
Enclosure material Stainless steel 1.4404
Pressure range 700...1 300 hPa (10.2...18.9 psi)
Electromagnetic compatibility EN 61326-1
(Industrial Environment) EN 61326-2-3
Storage conditions -20...70 °C (-40...158 °F)
0...95 % RH, non condensing
Configuration and Adjustment EE-PCS (Product Configuration Software, free download)
and configuration adapter
1) Standardized air velocity vn at standard conditions (factory setup): Tn = 23 °C (73 °F), pn = 1013.25 hPa (14.7 psi), settable via EE-PCS
2) The accuracy statement includes the uncertainty of the factory calibration with an enhancement factor k=2 (2-times standard deviation). The accuracy was calculated in
accordance with EA-4/02 and with regard to GUM (Guide to the Expression of Uncertainty in Measurement); T accuracy: at air flows ≥ 0.45 m/s

18 User Manual EE680 Air Velocity and Temperature Sensor for Laminar Flow
Fig. 19 vn 2-point adjustment
Modbus configuration adapter HA011018
E+E Product Configuration Software EE-PCS
(free download: www.epluse.com/configurator)
Protection cap M12 female connector HA010781
Protection cap M12 male connector HA010782
Connection cable M12 - flying leads (1.5 m (4.9 ft) / 5 m (16.4 ft) / 10 m (32.8 ft))
HA010819/20/21
T-coupler M12 - M12 HA030204
M12 cable connector for self assembly HA010708
Mounting set EE680 HA011601
M12 sealing plug stainless steel HA011602

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User Manual EE680 Air Velocity and Temperature Sensor for Laminar Flow
6.3 Temperature Adjustment
Fig. 20 T 1-point adjustment
Fig. 21 T 2-point adjustment

20 User Manual EE680 Air Velocity and Temperature Sensor for Laminar Flow
6.4 Resetting to Factory Adjustment
If necessary, the sensor can be reset to the factory settings (factory adjustment data), after a vn or T
customer adjustment has been performed.
Fig. 22 Reset to factory adjustment
6.5 Calibration and Adjustment at E+E Elektronik
Calibration and/or adjustment can be performed in the E+E Elektronik calibration laboratory. For
information on the E+E capabilities in ISO or accredited calibration please see www.eplusecal.com.
7 Maintenance and Service
EE680 does not require any special maintenance, nevertheless for highly accurate measurements
it is recommended to calibrate the probe every 6-12 months. Contamination on the sensor element
and the sensor head may lead to false measurement values. The sensor head must therefore be
checked regularly for contamination. If needed, the enclosure and the sensing head may be cleaned
as described below and the device may be re-adjusted as described in chapter 6.
7.1 Cleaning
The EE680 was optimized in means of used materials (probe and sensor head made of stainless steel
1.4404) for best resistance against H2O2sterilization processes and corrosive cleaning agents.
Approved cleaning methods are: H2O2sterilization, 6 % concentrated H2O2surface cleaning agents,
isopropyl alcohol.
Inappropriate cleaning agents can deposit on the sensor element and thus lead to incorrect
measurements results, or permanently damage the sensor element.
Prior to cleaning measures for any other then the approved methods the protection cap included in
the scope of the supply (see chapter 2) must be used.
Cleaning of the sensor head/probe body
If the sensor head or especially the sensing element is dusty or dirty, it may be carefully cleaned with
oil-free compressed air.
Do not apply any hard pressure shocks on the sensing element.
If cleaning with compressed air is not successful the sensor head can be carefully cleaned using
isopropyl alcohol by repeated immersion and drying.