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User Manual EE895

Miniature Sensor Module for CO

2

 , Temperature and Barometric Pressure  |  3

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/ee895

.

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”.

Содержание EE895

Страница 1: ...User Manual Miniature Sensor Module for CO2 Temperature and Barometric Pressure EE895...

Страница 2: ...2 1 Mounting via Solder Pads 7 3 2 2 Mounting via Side Plated Contacts 7 3 3 EE895 Block Diagram 8 3 5 Pin Description 9 3 6 Electrical Characteristics 11 3 7 Typical Applications 12 3 7 1 EE895 Conne...

Страница 3: ...NOTE Find this document and further product information on our website at www epluse com ee895 1 1 Explanation of Warning Notices and Symbols Safety precautions Precautionary statements warn of hazar...

Страница 4: ...tion or failure could cause injury to human beings NOTICE Failing to follow the instructions in this user manual may lead to measurement inaccuracy and device failures The EE895 may only be operated u...

Страница 5: ...t 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 el...

Страница 6: ...the instructions in this user manual may lead to measurement inaccuracy and device failures The EE895 housing and the circuit board shall not be exposed to unneccessary mechanical stress during instal...

Страница 7: ...he EE895 module can be mounted onto a pluggable female header or directly onto the electronics board by using a pin header with 2 54 mm 0 1 inch pitch The minimum clearance of 2 mm 0 08 inch shall be...

Страница 8: ...ter infra red lamp IR L 2 VCC_IO Power supply Power supply for the microcontroller 3 EN Input Enable the module Tie to Vcc_IO for normal operation 4 GND Power supply Ground1 5 GND Power supply Ground1...

Страница 9: ...s of the EN pin by an external host controller When the EN pin is pulled down to the logic Low 0 0 4 V the internal voltage regulator of EE895 is switched off and the current consumption is typically...

Страница 10: ...on the interface selected with pin 7 ISEL Pin 7 ISEL connected to ground EE895 features I2 C interface Pin no Mode Comment 8 SCL serial clock External pull up resistor to V bus high voltage level is r...

Страница 11: ...nd maximum current values in each individual state during the sampling interval which is shown in the current profile in Fig 8 Power Supply VCC_IO VCC_EM Status 3 3 V 5 V Idle measurement 6 2 9 9 mA 0...

Страница 12: ...ltage regulator The host can read the values at any time pin 6 RDY is not used 3 7 2 EE895 in Battery Powered Devices Fig 10 Example battery powerd devices Pin 7 ISEL is connected to the ground the EE...

Страница 13: ...described in detail in the Modbus Application Note AN0103 available at www epluse com ee895 4 1 I2 C Interface The EE895 supports the standard I2 C specification For detailed information about the I2...

Страница 14: ...value Lo CRC Stop S BF 03 04 00 00 41 DC 74 3F P For decoding of float values stored according standard IEEE 754 please refer also to the Modbus Application Note AN0103 Example of Decoding Modbus res...

Страница 15: ...130 means 1 013 mbar Tab 7 Data availability from the EE895 Miniature Sensor Module Example for reading all measurands 7 bit address shifted EE895 Request Hex S BC 00 P Start Slave address 7 bit shif...

Страница 16: ...e p 0x2670 9840 984 0 mbar Tab 9 Interpretation of data from the response 4 2 UART Interface 4 2 1 Modbus Protocol Over UART Interface Modbus slave address 0x5F The interface settings are Baud rate 96...

Страница 17: ...Register number1 DEC Protocol address2 HEX Read register function code 0x03 Temperature T C 100 4002 0xFA1 Temperature T F 50 4003 0xFA2 Temperature T K 50 4005 0xFA4 CO2 average pc4 ppm 1 4031 0xFBE...

Страница 18: ...s 0 terminated 1 Register address starts from 0 Tab 13 Available commands for I2 C and UART PLEASE NOTE When reading the serial number or the sensor name it is always necessary to read all 8 registers...

Страница 19: ...ble Measuring trigger command for the single shot measurement For accurate measurement results there are recommended six single shot measurements under stable temperature conditions Function code Regi...

Страница 20: ...fault 4 0x1452 CO2 customer offset ppm 16 bit integer signed Range 32 786 32 785 Default 0 ppm 1 Register address starts from 0 Tab 18 CO2 parameter settings The EE895 features an exponential moving a...

Страница 21: ...Residual pressure dependency2 typ 0 014 of the measured value mbar ref to 1 013 mbar Initialisation time power on 1 s Response time t63 140 s with measured data averaging smooth output 75 s without m...

Страница 22: ...ltage 3 3 5 V DC 5 Average current consumption typ for supply voltage 5 V 1 6 mA at 15 s sampling interval 196 A at 1 h sampling interval with standby between measurements 8 A at 1h sampling interval...

Страница 23: ...ance 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 Elekt...

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