epluse EE771 Flow Sensor for Compressed Air and Gases User Manual

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User Manual
EE771
Flow Sensor for Compressed
Air and Gases DN15 (1/2″) – DN50 (2″)

www.epluse.com

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.
All information, technical data and diagrams included in this document are based on the information available at the time of writing. It may contain technical inaccuracies and typographical errors. The contents will be revised on a regular basis and changes will be implemented in subsequent versions. The described product(s) and the contents of this document may be changed or improved at any time without prior notice.
All rights reserved by E+E Elektronik Ges.m.b.H. No part of this document may be reproduced, published or publicly displayed in any form or by any means, nor may its contents be modified, translated, adapted, sold or disclosed to a third party without prior written permission of E+E Elektronik Ges.m.b.H.

PLEASE NOTE
Find this document and further product information on our website at www.epluse.com/ee771.

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 very 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 that 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”.

1.2 Safety Instructions
1.2.1. General Safety Instructions

NOTICE
Improper handling of the device may result in its damage.

• The EE771 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.
• Use the EE771 only as intended and observe all technical specifications.

1.2.2. Intended Use
The flow sensor is intended to be used for the measurement of air and other non-corrosive gases in pipelines only. Please consult E+E Elektronik if measurement shall be carried out in wet or filthy gases.
The EE771 flow sensor design allows for measurement in a pressurized system up to PN16 (16 bar / 230 psi).

WARNING
Non-compliance with the product documentation may cause safety risks for people and the entire measurement installation.

• Prior to the start of the installation, the system has to be depressurized. Before installing or removing the probe or screw cap, the measurement ball valve should be closed.
• Mounting, electrical installation, putting in operation and maintenance should only be done by qualified personnel.
• The use of the flow sensor EE771 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 held responsible for damages as a result of incorrect handling, installation, and maintenance of the equipment.
• To avoid health risks or damage to the equipment, the installation should not be operated on with tools, which are not specifically mentioned or described in this manual.
• Excessive mechanical stress and inappropriate handling must be avoided.
• A short interruption of the flow using the measurement ball valve cannot be avoided when exchanging the sensing probe.
• The flow sensor can only be utilized in accordance with the conditions defined in the technical data. Otherwise, inaccuracies in the measurement will occur and equipment failures cannot be ruled out.
• For the safety of the user and for the functionality of the equipment the recommended steps by the manufacturer to put into operation, to test and to maintain should be taken and completed.

NOTICE
Failing to follow the instructions in this user manual may lead to measurement inaccuracy and device failures.

• The EE771 may only be operated under the conditions described in this user manual and within the specification included in chapter 9 Technical Data.
• Unauthorised product modifications result in the loss of all warranty claims. Modifications may only be made with the explicit authorisation of E+E Elektronik Ges.m.b.H.!

1.2.3. Mounting, Start-up and Operation
The EE771 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 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.

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.
• Disconnect the device from power supply before opening or closing to avoid damages.
• Do not install or start-up a device supposed to be faulty. Ensure that such devices are not used accidentally by clearly marking them 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.

Scope of Supply

• EE771 Flow Sensor for Compressed Air and Gases DN15 (1/2″) – DN50 (2″) according to the Ordering Guide
• Inspection certificate according to DIN EN 10204-3.1
• User Manual

Product Description

3.1 General
The EE771 flow sensor operates on the thermal mass flow measurement principle and is suitable for measuring the flow of compressed air and gases in pipelines. Gases can be e.g. air, nitrogen, argon, CO2 or other noncorrosive and non-flammable gases.
The EE771 measures flow velocity and volume flow at standard conditions according to DIN 1343 (pn = 1013.25 mbar (14.7 psi); Tn = 0 °C (32 °F)). Additionally, it measures mass flow, consumption and temperature. The value of the integrated consumption meter is not lost after a power failure.
Two signal outputs are available. Depending on the ordered version, the outputs can be configured as analogue (current or voltage) output, as switch output or as pulse output for consumption metering and optionally with additional digital interface (Modbus RTU or M-Bus).
The freely available configuration software can be used to configure all outputs, to perform sensor adjustment, to change process parameters and standard conditions, to enter the current process pressure for compensation and to set the communication parameters of the digital interface.
The measured data is indicated on the optional display, with selectable measurands to be displayed. Please refer to chapter 6.3 Display / Indicator with Keypad (Optional).

1. Signal conditioning with optional display
The enclosure with the signal conditioning is mounted either on the measurement probe (type T19 or T20 compact) or is remote with a pluggable sensor cable up to 10 m (33 ft) (type T3 with remote probe).|
2. Sensing probe with measurement electronics
The interchangeable sensing probe contains the sensor element and the measurement electronics, in which the data
of the factory calibration is stored. The sensing probe is easy and quickly interchangeable in the field, independent of the electronics for the signal conditioning. After the exchange, theconfiguration of the outputs is unchanged.
3. Sensor cable (only for type T3 with remote sensing probe)The sensor cable allows for the remote installation, up to 10 m(33 ft) of the sensing probe from the enclosure with the signal conditioning.|
4. Measurement valve with shut-off function
The measurement ball valve assembly allows for easy and reliable installation within the pipeline. During the installation in the pipeline, the required inlet and outlet paths (see chapter  4.3 Required Length of Straight Pipe) should be observed. Thenominal size of the measurement ball valve assembly must match the nominal size of the pipe. The measurement valve with shut-off function allows the sensor to be installed and removed with only a brief interruption to the process flow. The measurement ball valve assembly is suitable for pressures up to 16 bar (PN16) and available for pipe diameters DN15 (1/2″) to DN50 (2″).|
5. Screw cap
The screw cap, with female thread, is screwed in place if the flow sensor is not installed and the pipeline has to be used.

Tab. 1 Parts description
3.2 Dimensions
Values in mm (inch)
EE771 compact
Type T19, T20 Type T19, T20 EE771 compact
Type T19: flow direction right to left Type T20: flow direction left to right EE771 remote
Type T3:Cross-section bore hole The bottom part of the enclosure is mounted with 4 screws (not in the scope of supply). Max. screw diameter: 4.5 mm (0.17 inch), e.g. 4.2 x 38 mm DIN 7938H screws
Measurement valve with shut-off function

Valve| Thread’)| A| B| C| D13)| D2| ISO| NPT
---|---|---|---|---|---|---|---|---
DN15| Rp1/2″| 100±8 (3.94±0.32)2)| 55 (2.28)| 43 (1.69)| 36 (1.46)| 92 (3.62)| HA075015| Not available
DN20| Rp or NPT 3/4″| 73 (2.83)| 55 (2.28)| 43 (1.69)| 36 (1.46)| 92 (3.62)| HA075020| HA175020
DN25| Rp or NPT 1″| 88 (3.27)| 67 (2.28)| 52 (2.00)| 48 (1.73)| 125 (4.92)| HA075025| HA175025
DN32| Rp 1 1/4″| 100 (3.94)| 77 (2.64)| 62 (2.44)| —| 125 (4.92)| HA075032| Not available
DN40| Rp or NPT 1 1/2″| 110 (4.33)| 83 (3.27)| 74 (2.91)| —| 147 (5.79)| HA075040| HA175040
DN50| Rp or NPT 2″| 131 (5.16)| 88 (3.46)| 90 (3.54)| —| 147 (5.79)| HA075050| HA175050

1. Female thread: BSP thread acc. to EN 10226 (old DIN 2999) or NPT.
2. Including reduction 3/4″ – 1/2″
3. Phasing out, mixed deliveries are possible in the transition phase.

Tab. 2 Dimensions
3.3 Display
EE771 is available with an optional 2-line liquid crystal display and soft keys. Please find details on capabilities and operation in chapter 6.3 Display / Indicator with Keypad (Optional).

Mounting and Installation

4.1 Determining Installation Site
▪ The installation site should be easy to access and free of vibrations and shocks.
▪ A clearance of at least 120 mm (5 inches) must be maintained above the enclosure with signal conditioning, this will enable removal of the sensor if necessary.
▪ The ambient temperature should not exceed the value as stated in the specifications (please refer to chapter 1 General Information) – consider heating by radiation.
▪ Air purity on the installation site according to ISO 8573-1:2010: at least class 3.4.4
▪ The fluid should not condense at the installation site. Condensation on the tip of the sensing probe must be avoided.
▪ In compressed air systems, the installation must be downstream of the dryer. In case of no dryer, there must at least be a steam trap and suitable filters.
▪ The direction of the flow by the installation (see chapter 4.4 Assembly of the Measurement Ball Valve) must be observed.
▪ The recommended straight pipe lengths up and downstream must be observed, in order to warrant the specified measurement accuracy.
▪ The flow sensor should be installed as far as possible from any flow disturbance. Valves or check-valves should be installed in a respective distance from the flow sensor.

4.1.1. Process Pressure
Due to its measurement principle, the thermal mass flow sensor EE771 is largely independent of the process pressure and is factory calibrated at a pressure of 7 bar (100 psi).
In order to achieve the highest measurement accuracy, the slight dependence on process pressure can be compensated for in two ways:
▪ If the process pressure is stable, by programming the pressure value in the configuration software (see chapter 10.5.6 Setting up Process Parameters).
▪ In case of strong fluctuations of the process pressure (e.g. 3…10 bar (40…150 psi)), an external pressure sensor can be installed and connected to the pressure compensation input (see chapter 10.5.7 External Pressure Sensor for Pressure Compensation).
WARNING
Modifying the measuring system in a pressurised piping system may cause safety risks for people and the entire measurement installation.
In order to install, modify or remove the measurement section the pipeline system should be depressurized.
4.2 Installation Position
Make sure that the arrow on the tip of the sensing probe is pointing in the direction of the flow.

++ … Recommended installation position
+ ….. Not recommended if there is vibration on the pipeline
– …… Not recommended
Tab. 3 Correct sensor position
4.3 Required Length of Straight Pipe
The flow sensor should be installed as far as possible from disturbances of the flow. The causes for disturbance of the flow are for instance reducers, elbows, T-pieces, valves, gate valves, etc. The specified measurement accuracy can be achieved only when the following straight inlet and outlet pipe lengths are installed:
▪ The wall thickness of the inlet and outlet pipe should be 2.6 mm (0.1″).
▪ The stated values are a minimum. If possible, larger distances should be planned.
▪ Valves or gate valves should be installed downstream of the flow sensor.
▪ With lighter gases the inlet straight pipe should be longer.

Fig. 1 Optimum conditions to achieve the specified measurement accuracy

4.4 Assembly of the Measurement Ball Valve
NOTICE
▪ All connections must be made with appropriate sealing material on the threads.
▪ The sealing material should not change the area of the inner cross section of the pipe. It must be ensured that the connections are leak-free after installation.
▪ All fittings must be tested for seal tightness.
▪ During the assembly of the measurement section, it has to be ensured that the arrows on the pipe section and the measurement ball valve are pointing in the same direction as the flow.
▪ The recess for the alignment pin must be at the side of the outlet.Fig. 2 Position of the recess for the alignment pin
4.4.1. Assembly without Flow Sensor, but With Screw Cap Instead (Blind Cap) Fig. 3 Screw Cap
In order to use the measurement section without the flow sensor, the blind screw cap (in the scope of supply) must be screwed tight onto the opening of the measurement ball valve.
Tighten the red coloured retainer nut by hand. Hand-tightening should be sufficient.
NOTICE
If the seal is not leak tight, carefully tighten the nut a little further using a suitable tool.
Maximum torque 25 Nm!
If the screw cap is not needed, it can be screwed onto the handle of the measurement valve with shut-off function  and stored.
4.4.2. Shut Off the Measurement Ball Valve
The measurement ball valve assembly allows for the installation and removal of the flow sensor within seconds, with only a very short interruption of the flow.Fig. 4 Ball valve position open and closed
WARNING
Working with a pressurised piping system may cause safety risks for people and the entire measurement installation.
Never remove the flow sensor or the blind screw cap while the measurement ball valve is open.

4.5 Installation of the Flow Sensing Probe
4.5.1. Flow Direction
The flow direction is indicated by an arrow on the tip of the probe. Due to the alignment pin, installation of the sensing probe in the measurement ball valve is only possible in the direction of flow. After removal, the sensing probe will be re-installed in the measurement section at exactly the same position as done at the factory.
Maximum reproducibility is therefore guaranteed.
4.5.2. Installation of the Sensing Probe Fig. 5 Correct sensor position in flow direction
WARNING
Working with a pressurised piping system may cause safety risks for people and the entire measurement installation.
Make sure that the measurement ball valve is shut off.

1. Remove the transport protection cap of the head of the sensing probe.

2. Mount the sensing probe in the measurement valve with shut-off function in a way that the alignment pin fits into the recess on the measurement ball valve.

3. Screw the retainer nut by hand until a certain amount of resistance can be felt.Fig. 6 Correct installation position of the flow sensor

4. Check the correct installation position of the flow sensor. The alignment pin must fit in the recess on the measurement ball valve.
   NOTICE
   If the seal is not leak tight, carefully tighten the nut a little further using a suitable tool.
   Maximum torque 25 Nm!

5. The mechanical installation of the flow sensor is now complete.

Fig. 7 Fixation of the flow sensor

Electrical Connection

NOTICE
The power supply must be switched off before the electrical connection is made. If not observed, the
electronics can be damaged as a result. Only a qualified electrical engineer may install the device.
▪ Unscrew the four screws and remove the cover of the enclosure.
▪ The screw terminals are located in the bottom part of the enclosure.
▪ For the electrical connection of the flow sensor a 6-wire cable is needed (e.g. 6×1 mm2 (AWG 17))

5.1 Connection Diagram
WARNING
Incorrect installation, wiring or power supply may cause overheating and therefore personal injuries or property damage.
▪ 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 property damage as a result of incorrect handling, installation, wiring, power supply or maintenance of the device.Fig. 8 EE771 connection options
▪ Screw terminal OUT 1-1 for the analogue output is internally connected with GND.
▪ The enclosure should be grounded to achieve optimal electromagnetic compliance.

5.1.1. Relay and Pulse Output, Internal Switching The relay switch and pulse outputs are potential free.
5.1.2. Connection with Optional Plug for Power Supply and Outputs (Order Code E4) Connection plug for the power supply and analogue outputs (rear view of the terminals)

Setup and Configuration

6.1 Jumpers for output configuration
If the signal output is altered from the relay to the analogue output or vice versa, Jumper Output 1 has to be relocated. If the analogue output is altered from a current to a voltage output or vice versa, Jumper Out-1 has to be relocated. 6.2 USB Configuration Interface
The USB connector is located behind the blind screw cap, at the side of the enclosure.

1. Remove the blind screw cap with a screwdriver
2. Plug in the USB cable which connects the sensor to the PC.

PLEASE NOTE
Install the configuration software that is included in the scope of supply. The configuration software can also be downloaded from our website www.epluse.com/ee771. 6.3 Display / Indicator with Keypad (Optional)
An optional 2-line display is available for the flow sensor EE771. The display is integrated into the enclosure cover and has two softkeys for controlling the display.Depending on the configuration of the outputs either the measured values, the status of the relay or the consumption is indicated.

6.3.1. Indication of the Analogue and Pulse Output
Line 1 always indicates the configured measurand at output 1. In line 2 the desired measurement value can be displayed using the UP and DOWN keys.
6.3.2. Indication of the Switch Output
Line 1 indicates the status of the switch output. In line 2 the desired measurement value can be indicated using the UP and DOWN keys.
The display shows an inverse image if the relay output is active (relay has switched). 6.3.3. Indication of the MIN / MAX Values
Keep the DOWN key pressed for >3 seconds to indicate the MIN value.
Keep the UP key pressed for >3 seconds to indicate the MAX value.After that the several different measurement values can be indicated using the UP or DOWN keys.
Keep the UP or DOWN key pressed for >3 seconds to exit the MIN / MAX mode. 6.3.4. Reset of the Consumption Meter or the MIN / MAX Value
Keep both the UP and DOWN key pressed for >3 seconds to enter the menu for resetting the consumption meter or the MIN / MAX value. Select the desired menu item by pressing the UP or DOWN key briefly.To confirm the selected choice of the menu keep the UP or DOWN key pressed for >3 seconds.Select menu item “NO” or “EXIT” to cancel without resetting.

6.3.5. Maximum Consumption Meter

The maximum consumption meter readout on the display is 999 999 999.0 m3 or 99 999 999.0 ft3 . Then it shows “LCD maximum”. The internal memory continues counting. The maximum counter reading is 3.4*10 38 m3.
It is possible to read-out the counter reading with the configuration software.
6.4 Bus Output (Optional)
6.4.1. M-Bus (Meter-Bus)
The M-Bus (Meter Bus) is a field Bus for recording consumption data. Transmission is carried out serially on a
reverse polarity protected 2-wire line. The flow sensor as an M-Bus slave requires a separate supply voltage. Nospecific topology (line or star) is prescribed for the cabling. Normal telephone cable of type J-Y(St)Y Nx2x0.8 mmcan be used. A maximum of 250 meters is permitted per segment (primary address).
Read-out of the current measurement/consumption data
The following measurement/consumption values are transmitted during a standard query:
▪ Standardized volume flow (32 bit Real)
▪ Temperature (32 bit Real)
▪ Mass flow (32 bit Real)
▪ Consumption meter status (32 bit Real)
▪ Flow velocity (32 bit Real)
▪ Standardized volume flow (32 bit Integer)
▪ Temperature (32 bit Integer)
▪ Mass flow (32 bit Integer)
▪ Consumption meter status (64 bit Integer)
▪ Flow velocity (32 bit Integer)
The table below shows the package structure of the measurement/consumption data sent by the EE77x sensor:
Header**** 68| Start of the telegram
---|---
4F 4F| L-field (length)
68| Second starting signal
08| C-field (RSP_UD)
XX| A-field (address)

Start User Data****

Data Record 1: Volume Flow****

Data Record 2: Temperature****

Data Record 3: Mass Flow****

Data Record 4: Consumption Meter Reading****

Data Record 5: Flow Rate****

Data Record 6: Pressure****

Data Record 7: Volume Flow****

Data Record 8: Temperature****

Data Record 9: Mass Flow****

Data Record 10: Consumption Meter Reading****

Data Record 11: Flow Rate****

Data Record 12: Pressure****

End User Data****

Tab. 4 Package structure of the measurement and consumption data
Secondary Addressing
In addition to primary addressing, the EE77x sensor provides the option of secondary addressing. The fields of identification number, manufacturer, version and medium are used together as the secondary address. The exact sequence of the secondary addressing is described in detail in the M-Bus Standard: https://m-bus.com/assets/downloads/MBDOC48.PDF.
6.4.2. Modbus RTU Register Map
The measured data is saved as 32 bit floating point values (data type FLOAT32). Depending on the measurementunit selected, measurements are saved in SI or US/GB units. The measurement unit can be changed using the configuration software.
For resetting the MIN / MAX values, write 0 to the corresponding write register.
For Modbus protocol setting please see Application Note AN0103 available at www.epluse.com/ee771.

FLOAT32

Parameter| SI Unit| US/GB Unit| Register number 1) [DEC]| Register address 2) **[HEX]**
Read register: function code 0x03 / 0x04
Standardized flow| m/s| SFPM| 026| 19
Standardized volume flow| m3/h| SCFPM| 028| 1B
Temperature| °C| °F| 030| 1D
Mass flow| kg/h| kg/h| 032| 1F
Consumption meter reading| m3| ft3| 034| 21
Pressure| bar| psi| 036| 23
MIN value standardized flow| m/s| SFPM| 261| 104
MAX value standardized flow| m/s| SFPM| 263| 106
MIN value standardized volume flow| m3/h| SCFPM| 265| 108
MAX value standardized volume flow| m3/h| SCFPM| 267| 10A
MIN value temperature| °C| °F| 269| 10C
MAX value temperature| °C| °F| 271| 10E
MIN value mass flow| kg/h| kg/h| 273| 110
MAX value mass flow| kg/h| kg/h| 275| 112
MIN value pressure| bar| psi| 277| 114
MAX value pressure| bar| psi| 279| 116

1. Register number starts from 1.
2. Register address starts from 0.

Tab. 5 EE771 FLOAT32 measured data registers

Write registers for resetting values (INT16)

Parameter| Register number 1) [DEC]| Register address 2) **[HEX]**
Write register: function code 0x06
Reset MIN/MAX value standardized flow| 261| 104
Reset MIN/MAX value standardized volume flow| 262| 105
Reset MIN/MAX value temperature| 263| 106
Reset MIN/MAX value mass flow| 264| 107
Reset MIN/MAX value pressure| 265| 108

1. Register number starts from 1.
2. Register address starts from 0.

6.4.3. Data Transmission****

| Factory settings| Selectable values
---|---|---
M-Bus| Modbus RTU| M-Bus| Modbus RTU
Baud rate| 2 400| 9 600| 600…9 600| 9 600…57 600
Data bits| 8| 8| 8| 8
Parity| Even| Even| None, Odd, Even| None, Odd, Even
Stop bits| 1| 1| 1 or 2| 1 or 2
Address| 1| 1| 0…254| 1…247

6.4.4. Device Address
User Manual EE771
The DIP switches on the electronics board can be used to set the device address directly on-board or to switch to software configuration.
The flow sensors are factory-set to address 1.
Fig. 13 Address setting

Maintenance and Service

7.1 Error Messages
In case the flow sensor is equipped with the optional display, the following error message can be indicated.

Check the head of the sensing probe for visual damage.
Check the sensor cable from the sensing probe to the electronics of the signal conditioning
02| The EEPROM for storing of the consumption meter and MIN / MAX value is defect.
The consumption meter and MIN / MAX values are no longer available. All measurement values are still indicated. The analogue, relay and pulse output are still functional.| Return the faulty unit to E+E for service

7.2 Maintenance
Regular cleaning of the sensor is required for applications in wet or filthy gases. The sensor must be cleaned before calibration or evaluation.
Removal of the Sensing Probe of the Flow Sensor
WARNING
Working with a pressurised piping system may cause safety risks for people and the entire measurement installation.
Never remove the flow sensor while the measurement ball valve is open.

1. Shut-off the measurement valve with the shut-off function (see chapter 4.4 Assembly of the Measurement Ball Valve).
2. Turn off the power supply, remove the cover and disconnect the power wires from the screw terminal.
3. Loosen the retainer nut and pull the sensor probe from the measurement section.

For operation without the flow sensor installed please refer to chapter 4.4.1 Assembly without Flow Sensor, but With Screw Cap Instead (Blind Cap).
7.3 Cleaning the Sensing Element of the Flow Sensor
Clean the head of the sensor probe by carefully swirling it in warm water or isopropyl alcohol. It is recommendedto use isopropyl alcohol if the pollution is grease or oil.
PLEASE NOTE
Do not use an abrasive cleaning agent, an organic solvent containing halogen or acetone.
PLEASE NOTE
Do not touch the sensor with fingers or solid objects like screwdrivers or brushes.
Let the device dry in the ambient air.
7.4 Repairs
Repairs are to be carried out by the manufacturer only. The attempt of unauthorized repair invalidates any warranty claims.

Replacement Parts / Accessories

8.1 Order Code Replacement Sensor

Order Examples
PE771-T19HV31N25E4

Fig. 14 Replacement sensor, compact ri-le
PE771-T3HV31N25

Fig. 15 Replacement sensor, remote probe
8.2 Order Code Miscellaneous

Measurement ball valve
DN15
DN20
DN25
DN32
DN40
DN50| HA075015
HA075020
HA075025
HA075032
HA075040
HA075050
Probe cable (for type T3) Cable length
2 m
5 m
10 m| ****

HA010816
HA010817
HA010818

Screw cap (blind cap)| HA010201

Technical Data

Measurands

Standard conditions| Factory setting according to DIN 1343 pn = 1 013.25 mbar (14.7 psi), Tn= 0 °C (32 °F)
---|---
Measuring range
Standardized volume flow in| Medium| Pipe-diameter| HV31| HV33
| Air| DN15 (1/2″)| 0.32…63 m3/h (0.19. 37.1 SCFM)| 0.32…126 m3/h (0.19. 74.1 SCFM)
DN20 (3/4″)| 0.57…113 m3/h (0.34. 66.5 SCFM)| 0.57…226 m3/h (0.34…133 SCFM)
DN25 (1″)| 0.90…176 m3/h (0.53. 103.5 SCFM)| 0.90…352 m3/h (0.53. 207.1 SCFM)
DN32 (1 1/4″)| 1.45…289 m3/h (0.85. 170.0 SCFM)| 1.45…578 m3/h (0.85…340 SCFM)
DN40 (1 1/2″)| 2.26…452 m3/h (1.33. 265.9 SCFM)| 2.26…904 m3/h (1.33. 531.8 SCFM)
DN50 (2″)| 3.50…700 m3/h (2.06. 411.8 SCFM)| 3.50…1 400 m3/h (2.06. 823.6 SCFM)
Measuring range
Standardized flow in| Medium| Pipe-diameter| HV31| HV33
| Air, CO 2,
Nitrogen, Argon| ≤DN50 (2″)| 0.5…100 m/s (100…19 685 SFPM)| 0.5…200 m/s (100…39 370 SFPM)
O 2| ≤DN25 (1″)| 0.5…77 m/s (100…15 157 SFPM)| 0.5…200 m/s (100…39 370 SFPM)
Accuracy 1)
in air @ 7 bar (101.5 psi) (abs) and 23 °C (73 °F)| ±(1.5 % of measured value + 0.5 % of full scale)
Temperature dependency| ±(0.1 % of measured value/°C)
Response time t 90, typ.| <1 s
Sampling interval| 0.1 s

1. 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).
   The accuracy specifications apply when using inlet and outlet sections of suitable length, see Accessories and chapter 4.3 Required Length of Straight Pipe.

Temperature (T)

Measuring range| -20…+80 °C (-4…+176 °F)
Accuracy @ 20 °C (68 °F)| ±0.7 °C (±1.26 °F)

Outputs

Analogue|
---|---
Signal range and measurands are freely configurable| 0 – 10 V
0 mA < IL < 1 mA
IL = load current
4 – 20 mA 3-wire
RL < 500 Ω
RL = load resistance
0 – 20 mA 3-wire
RL < 500 Ω
Switch output| Potential free, max. 44 V DC, 500 mA switching capacity
---|---
Pulse output| Totalizer, pulse length: 0.02…2 s

Digital (optional)

Protocol 1) Factory settings
Supported Baud rates Measured data types| Modbus RTU
9 600 Baud, parity even, 1 stop bit, Modbus address 1
9 600, 19 200, 38 400 and 57 600
FLOAT32
Protocol 2) Factory settings
Supported Baud rates| M-Bus
2 400 Baud, parity even, 1 stop bit, M-Bus address 1
600, 1 200, 2 400, 4 800 and 9 600

1. Find more details about communication setting in chapter 6.4 Bus Output (Optional) and the Modbus Application Note at www.epluse.com/ee771.
2. Find more details about communication setting in chapter 6.4 Bus Output (Optional).

Input

External Dynamic Pressure Compensation

Requirements to the pressure sensor| 4 – 20 mA (2-wire, 15 V) (relevant for gases other than air and nitrogen)

General

Power supply class III USA & Canada: Class 2 supply necessary, max. voltage 30 V DC| 18 – 30 V AC/DC
---|---
Current consumption , max.| <200 mA (with display)
Electrical connection| Cable gland M16 and screw terminals max. 1.5 mm2 (AWG 16), optional with connector M12x1, 8 poles
Nominal pressure| 16 bar (232 psi)
Humidity range| 0…100 %RH, non-condensing
Temperature range Ambient, Storage Medium| -20…+60 °C (-4…140 °F)
-20…+80 °C (-4…+176 °F)
Material Enclosure Probe Probe head Measurement valve| AlSi9Cu3 (Metal) Stainless steel Stainless steel / glass Brass
Protection rating Enclosure| IP65 / NEMA 4X
Electromagnetic compatibility| EN 61326-1
FCC Part15 Class B
EN 61326-2-3 ICES-003 Class B
Industrial environment
Conformity|

Factory Setting of Outputs – SI Units

Standardized volume flow
DN15
DN20
DN25
DN32
DN40
DN50| 0
0
0
0
0
0| 60
110
175
285
450
700| 120
220
350
570
900
1 400| m3/h
m3/h
m3/h
m3/h
m3/h
m3/h
Mass flow
DN15
DN20
DN25
DN32
DN40
DN50| 0
0
0
0
0
0| 75
140
220
360
570
890| 150
280
440
720
1 140
1 780| kg/h
kg/h
kg/h
kg/h
kg/h
kg/h
Standardized flow| ≤DN50| 0| 100| 200| m/s
Temperature| all Ø| -20| 80| 80| °C
Switching output| From| To| Unit
---|---|---|---
Switching point / Hysteresis|
Standardized volume flow
DN15
DN20
DN25
DN32
DN40
DN50| 50/5
90/9
150/15
230/23
360/36
560/56| 100/10
180/18
300/30
460/46
720/72
1 120/112| m3/h
m3/h
m3/h
m3/h
m3/h
m3/h
Mass flow
DN15
DN20
DN25
DN32
DN40
DN50| 60/6
110/11
200/20
290/29
460/46
700/70| 120/12
220/22
400/40
580/58
920/92
1 400/140| kg/h
kg/h
kg/h
kg/h
kg/h
kg/h
Standardized flow| ≤DN50| 80/8| 180/18| m/s
Temperature| all Ø| 30/3| 70/7| °C
Pulse output|
---|---
Pulse value = 1 m3| Pulse duration = 0.1 s

Factory Setting of Outputs – US Units

Standardized volume flow
DN15
DN20
DN25
DN32
DN40
DN50| 0
0
0
0
0
0| 35
60
100
165
260
410| 70
120
200
330
520
820| SCFM
SCFM
SCFM
SCFM
SCFM
SCFM
Mass flow
DN15
DN20
DN25
DN32
DN40
DN50| 0
0
0
0
0
0| 75
140
220
360
570
890| 150
280
440
720
1 140
1 780| kg/h
kg/h
kg/h
kg/h
kg/h
kg/h
Standardized flow| ≤DN50| 0| 20 000| 40 000| SFPM
Temperature| all Ø| -4| 176| 176| °F
Switching output| From To| | Unit
---|---|---|---
Switching point / Hysteresis|
Standardized volume flow
DN15
DN20
DN25
DN32
DN40
DN50| 30/3
50/5
80/8
130/13
210/21
330/33| 60/6
100/10
160/16
260/26
420/42
660/66| SCFM
SCFM
SCFM
SCFM
SCFM
SCFM
Mass flow
DN15
DN20
DN25
DN32
DN40
DN50| 60/6
110/11
200/20
290/29
460/46
700/70| 120/12
220/22
400/40
580/58
920/92
1 400/140| kg/h
kg/h
kg/h
kg/h
kg/h
kg/h
Standardized flow| ≤DN50| 15 000/1 500| 30 000/3 000| SFPM
Temperature| all Ø| 90/9| 150/15| °F
Pulse output|
---|---
Pulse value = 1 CF| Pulse duration = 0.1 s

Configuration Software

10.1 Introduction
The configuration software allows for a user-friendly adaptation of the flow sensor to the application. In addition, the measurement values for flow and temperature can be calibrated / adjusted.
The configuration software can be downloaded free of charge at www.epluse.com/ee771.
LIMITED LIABILITY
E+E Elektronik shall not be held liable for any damages or consequential damages (for example, but not restricted to, loss of earnings, interruption of business, loss of information and data or any other financial losses) resulting from the installation, use or impossibility of use of an E+E Elektronik software product and any associated support services or non- performance of support services.
The system requirements for the installation and execution of the software are:
▪ Windows XP with SP3, Windows Vista or Windows 7
▪ .NET framework 3.5 with SP1
▪ USB 2.0 interface
PLEASE NOTE
During setup there will be no installation of .NET Framework 3.5 SP1 – if the required version is not already installed on the computer, the following error message will appear at the start of the configuration software.
.NET Framework 3.5 SP1 can be installed using Windows Update. 10.2 Installation
In order to set up a smooth installation of the configuration software of the EE771, admin authorization for the personal computer is required.
▪ During installation of the software the EE771 should NOT be connected to the computer via the USB cable.
▪ With Setup.exe the InstallShield-Wizard for the EE771 configurator will be started.
▪ Follow the instructions on the screen to install the software.
PLEASE NOTE
▪ First, the configuration software is installed, then the installation of the USB driver is activated – unless the user has specified that the USB setup is disabled.
▪ The USB driver will be installed automatically the moment the first connection is made with the EE771.
▪ The dialogue boxes that appear can be handled with the settings “No. Do not download driver from the Internet” and “Install the hardware automatically”.
If the EE771 configuration software and the USB driver are installed correctly, and the EE771 is connected to the personal computer via the USB interface, a connection “Silicon Labs C210x USB to UART Bridge” should have been created in the device manager.
See: Start → Settings → Control Panel → System → Hardware → Device Manager Configuration of the USB Interface (VirtualCOM)
After the startup of the software, the correct VirtualCOM interface for the USB driver must be configured. The number for the used USB interface can be found under:
Start → Settings → Control Panel → System → Hardware → Device Manager The setting is done under menu “Extras” and menu item “Optional extras …” Select the COM-port number as shown in the device manager. PLEASE NOTE
These settings are done only once and at the first start of the configuration software. The settings are stored for future use.
10.3 User Interface

After retrieving the data from the sensor, the basic information of the device is shown here.
2| Status message:
Here the status messages and other information are displayed.
3| Input screen:
Input screen for the configuration or adjustment of the flow sensor.
4| Menu tool bar:
** Selection of menu items.

10.4 Menu Toolbar
10.4.1. File

10.4.2. Transmitter
PLEASE NOTE
The term “Transmitter” is used synonymously with “Sensor” in this user manual.

The following settings are uploaded to the transmitter.
▪  Units
▪  Output 1
▪  Output 2
▪  Display mode
▪  Pressure transmitter

Prior to uploading the “new” configuration to the transmitter, a dialog box will show a summary of the changes.
Click on the button “OK” and the configuration will be uploaded to the transmitter, click “Cancel” to cancel the operation.
10.4.3. Extras
Configurations of the VirtualCOM interface (see “Configuration of the USB Interface (VirtualCOM)” in chapter 10.2 Installation).
10.5 Input Screen
10.5.1. Output 1, Output 2
In this screen the actual settings of the transmitter for the outputs 1 and 2, resp. relay 1 and 2 are shown. The user can alter and upload these settings to the transmitter, together with other changes of the configuration.
Output Mode
Here the mode of signal output can be determined.
▪ Output 1: Analogue or switch (relay) output
▪ Output 2: Switch (relay) or pulse output
PLEASE NOTE
In case the mode of output 1 is changed, the Jumper J1 on the board of the signal conditioning electronics has to be relocated as well (see chapter 6.1 Jumper J1 and J2).

Measurand
Here it is determined which measurand will be represented at the particular output.
Units
Choice of the engineering units of the selected measurand in either SI- (m/s; °C; m3 /h) or US-units (SFPM; °F; SCFM).
PLEASE NOTE
The setting “Units” on the tabs for Output 1 and Output 2 are in sync with each other. If the units are changed on one of the output tabs, automatically the units on the other output tab are changed accordingly.
Output Mode – Analogue

| Within the limits of measurement range and the scaling of the output, the analogue output can be freely configured and scaled. Either a standard output signal (0 – 5 V, 0 – 10 V, 0 – 20 mA, 4 – 20 mA) can be selected or a user defined range for the current / voltage output (e.g. 1 – 9 V).

PLEASE NOTE
In case the analogue output is changed (from current to voltage or vice versa), the Jumper J2 on the board of the signal conditioning electronics has to be relocated as well (see chapter 6.1 Jumper J1 and J2).
Output Mode – Switch (Relay)

| In the field for the “Switch-mode”, one can select “Hysteresis” or “Window”.
Menu| Description
---|---
| The field “Type” is to determine the switch action of the relay, NO = Normally Open (activate to close), NC = Normally Close (activate to open).

Under “Measuring range” in the field “From” the low value of the measuring range can be entered and the high value in the field “To”.

| The hysteresis of the set point is entered as a percentage of the measuring range.
[Measuring range] = high measuring value – low measuring value e.g. hysteresis Set point = 500 m3/h and reset point is 450 m3/h Hysteresis = 50 m3/h = 0.5 % of measuring range

Hysteresis When the measurement value reaches set point 1, the relay will be activated. The value at the reset point is the value at set point 1 minus the hysteresis.
e.g. set point 1 = 100 m3 /h and the hysteresis 5 m3 /h. The relay switches at 100 m3 /h. The reset point is at 96 m3 /h. Window

Output Mode – Pulse
If output 2 is configured for pulse, the measurand can only be consumption. The duration of the pulse and the pulse value (significance level of the pulse) can be freely configured under “Pulse”. The duration of the pulse can be set between 0.02 and 2 seconds.

The pulse/interval ratio must be at least 1:2, meaning that the duration of the pulse interval must be at least twice the duration of the pulse itself.Calculation of the minimum “pulse value” or the maximum “pulse duration”.
IMPW_MIN = NORMV_MAX [m3 /h] IMPL [s] / 1200 IMPL_MAX = IMPW [m3 ] 1200 / NORMV_MAX [m3 /h]

10.5.2. Minimum Flow Shutdown
The minimum flow shutdown is switched on and off using the “active” checkbox.
If the output signal is ≤ than the set “Shutdown value”, the flow sensor issues 0 on the analogue output. 10.5.3. Display
If an optional display is installed, at the tab Display the following items can be entered:
Drop-down input field “Display-Mode”
▪ Single spaced
▪ Double spaced (default)
Checkbox “Backlight”
▪ Checked = ON
▪ Unchecked = OFF 10.5.4. Adjustment
The user can perform an adjustment for the measurands normflow and temperature in air.
The configuration software automatically distinguishes between a 1-point and a 2-point adjustment, depending on how many reference points for adjustments are entered.
The values entered for the customer’s adjustment are stored in the electronics of the sensing probe and are therefore not lost if the electronics of the signal conditioning are replaced (see chapter 3 Product Description ) If the checkbox “Performing customer-adjustment” is checked, the adjustment mode will be activated and the actual measuring value in the set interval automatically retrieved from the flow sensor (transmitter).
PLEASE NOTE
▪ At first change to “Calibration gas” in the tab “Process parameters”.
▪ While the customer-adjustment is active all other pages, functions and commands are deactivated.

| Adjustment| The measurand to be adjusted is selected
Measuring value| The actual measurement value of the transmitter is indicated. The update- interval can be set.
Reference value| The measurement value of the standard is entered.

After clicking the “send” button, a control dialog box appears in which the values can be corrected if necessary.
The reference value is then loaded into the flow sensor (transmitter) and the setting process is complete.
The reference point of the customer-adjustment must be within the determined measuring range.
The customer-adjustment results in a slight rotation of the characteristic line, in such a way that the measurement deviation at the upper and lower adjustment points equals zero.
The configuration software determines, depending on its position, if it is an upper or lower adjustment point.
1-point Adjustment

Possibility| Lower adjustment point| Upper adjustment point| m.r. = measuring range
---|---|---|---
1| 0 – 50 % of m.r.| 100 % of m.r.
2| 0 % of m.r.| >50 – 100 % of m.r.

Upper adjustment point at 80% of measuring range
Lower adjustment point automatically at 0% of m.r. Lower adjustment point at 20% of measuring range
Upper adjustment point automatically at 100% of m.r. 2-point Adjustment
With a 2-point adjustment procedure the lower adjustment point must be between 0 and 40% of the measuring range and the upper adjustment point between 60 and 100% of the measuring range. If the adjustment point is between 40 and 60% of the measuring range, automatically a 1-point adjustment procedure will be executed instead.

Possibility| Lower adjustment point| Upper adjustment point| m.r. = measuring range
---|---|---|---
1| 0 … <40 % of m.r.| 60…100 % of m.r.
2| 40 … <50 % of m.r.| 100 % of m.r.
3| 0 % of m.r.| 50 – <60 % of m.r.

Lower adjustment point at 10% of measuring range
Upper adjustment point at 90% of measuring range

Reset to Factory Settings
Customer-adjustment can be reset to the factory settings by checking the appropriate checkbox and subsequently clicking the “reset” button. 10.5.5. Measuring Values Overview
The tab “measuring values” provides an overview of the retrieved actual measurement values of the flow sensor (transmitter).

| Clicking on “Fetch values” will retrieve the actual measurement and MIN / MAX values for flow, volume flow, temperature, mass flow and pressure (only if a pressure transmitter is connected) from the transmitter – additional the reading of the consumption meter is retrieved as well.
Checking the “Polling” checkbox will retrieve the measuring data from the transmitter at the selected interval.

Reset of the MIN / MAX Values
The MIN / MAX values of each measurand, as stored in the flow sensor (transmitter), can be reset by checking the appropriate checkbox and subsequently clicking the “Clear MIN / MAX” button. Reset of the Consumption Meter (Totalizer)
The reading of the consumption meter can be reset by clicking the “Reset meter” button. 10.5.6. Setting up Process Parameters
In the tab “Process Parameters” the Process gas (medium) can be changed and the pressure compensation can be set.
Change the Process Gas
PLEASE NOTE
This function is only active if the flow sensor has been ordered (see order code “Medium” in the datasheet) for a medium other than air.

| Calibration gas| The gas (medium) in which the flow sensor was calibrated in the factory. Unless otherwise specified, the flow sensor is always calibrated in air at the factory.
Process gas| The gas (medium) in the measured process.
The adjustable process gases are set at the factory and can be selected from a list.

The flow sensor is factory set to the ordered gas (medium). If the setting for the process gas is modified or changed between calibration and process gas, the changed setting has to be sent to the transmitter. Use “send data to the transmitter and read …” button. The “active gas” to which the flow sensor is set can be seen in the basic information field. Changing the Standard Conditions
The flow sensor is factory-set to standard conditions conforming to DIN 1343.
Factory setting: pn = 1013.25 mbar, Tn = 0 °C (32 °F).
The corrected volume flow value is calculated in line with the standard conditions set. Pressure Compensation
The flow sensor is factory-adjusted to 7 bar (abs). At an operating pressure other than 7 bar (abs), the error can be corrected via the pressure coefficient of +0.5% of the measured value per bar by entering the actual system pressure.
The “Send” button is used only to send the process pressure to the transmitter. 10.5.7. External Pressure Sensor for Pressure Compensation
In order to achieve the highest accuracy, the input from an external pressure transmitter will be very useful if the pressure fluctuates strongly (e.g. 3 to 10 bar (45 to 150 psi)). An absolute pressure transmitter with a 2-wire loop, powered 4 – 20 mA output, should be used.
On the tab “Pressure transmitter” the measuring range can be entered. 10.5.8. Bus Configuration
If the flow sensor is equipped with an optional bus module, the data transfer rate and the network address can be set on the “Bus configuration” tab.
The network address set is only used when the DIP switches on the flow sensor PCB are set to 255 (see 6.4.1 M-Bus (Meter-Bus)).

Conformity

11.1 Declarations of Conformity
E+E Elektronik Ges.m.b.H. hereby declares that the product complies with the respective regulations listed below:
European directives and standards
and
UK statutory instruments and designated standards
Please refer to the product page at www.epluse.com/ee771 for the Declarations of Conformity.

11.2 FCC Part 15 Compliance Statement
This equipment has been tested and found to comply with the limits 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 in accordance with the installation manual, 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 can be determined 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 into an outlet on a circuit different from that to which the receiver is connected.
▪ Consult the dealer or an experienced radio/TV technician for help.
11.3 ICES-003 Compliance Statement
This Class B digital apparatus complies with Canadian ICES-003.

Company Headquarters &
Production Site
E+E Elektronik Ges.m.b.H.
Langwiesen 7
4209 Engerwitzdorf | Austria
T +43 7235 605-0
F +43 7235 605-8
info@epluse.com
www.epluse.com
Subsidiaries
E+E Sensor Technology (Shanghai) Co., Ltd.
T +86 21 6117 6129
info@epluse.cn
E+E Elektronik France SARL
T +33 4 74 72 35 82
info.fr@epluse.com
E+E Elektronik Deutschland GmbH
T +49 6171 69411-0
info.de@epluse.com
E+E Elektronik India Private Limited
T +91 990 440 5400
info.in@epluse.com
E+E Elektronik Italia S.R.L.
T +39 02 2707 86 36
info.it@epluse.com
E+E Elektronik Korea Ltd.
T +82 31 732 6050
info.kr@epluse.com
E+E Elektronik Corporation
T +1 847 490 0520
info.us@epluse.com
BA_EE771 | Version v4.6 | 02-2024 | 193296
© Copyright E+E Elektronik Ges.m.b.H. | All rights reserved.
www.epluse.com

References

• Sensor Technology: Humidity, CO2, Flow & Temperature Measurement

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