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F-901B Reference Manual

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Table of Contents

IMPORTANT SAFEGUARDS ................................................................................................................................................ 2

F-901B Specifications ......................................................................................................................................................... 3

Instrument Overview ......................................................................................................................................................... 4

Cables and Tubes Installation ............................................................................................................................................ 4

Cables Assembly ................................................................................................................................................................ 5

Principle of Operation ....................................................................................................................................................... 6

Flow cycle ...................................................................................................................................................................... 6

Operating modes ........................................................................................................................................................... 6

MODBUS ............................................................................................................................................................................ 7

RTU RS485 Configuration .............................................................................................................................................. 7

Pin Description ............................................................................................................................................................... 7

Absolute Maximum Rating ............................................................................................................................................ 8

RS485 Modbus Parameters ........................................................................................................................................... 8

F-901B MODBUS Specifications ..................................................................................................................................... 8

Input Registers ........................................................................................................................................................... 8

Holding Registers ....................................................................................................................................................... 9

Coils ......................................................................................................................................................................... 10

Maintenance of the F-901B ............................................................................................................................................. 11

Replacing th

e Ethylene (C2H4), Oxygen (O₂) Sensor and Potassium Permanganate Filter (KMnO4)

......................... 11

Calibration ................................................................................................................................................................... 13

User calibration ....................................................................................................................................................... 13

Warranty Information ..................................................................................................................................................... 14

Warranty Registration Card ............................................................................................................................................. 15

Summary of Contents for F-901B

Page 1: ...July 2019 F 901B Reference Manual Version 1 4 6 15 16 1554 NE 3rd Ave Camas WA 98607 USA Phone 360 833 8835 www felixinstruments com...

Page 2: ...6 Operating modes 6 MODBUS 7 RTU RS485 Configuration 7 Pin Description 7 Absolute Maximum Rating 8 RS485 Modbus Parameters 8 F 901B MODBUS Specifications 8 Input Registers 8 Holding Registers 9 Coils...

Page 3: ...e socket If sampling via tubing make sure that the tubes are securely attached to the device before operating Use the included hydrophobic filter to prevent liquid water from entering device See Cable...

Page 4: ...m Lower Detection Limit 2 ppm Response Time T90 3 minutes Temperature Range 0 C to 50 C Pressure Range 1013mbar 10 Relative Humidity Range 15 to 90 R H non condensing Long Term Output Drift 5 per mont...

Page 5: ...CURED BEFORE POWERING UP DEVICE MAKE SURE THERE IS NO FLOW OBSTRUCTION AT INLET OUTLET BEFORE POWERING UP DEVICE USE HYDROPHOBIC FILTER DURING SAMPLING TO PROTECT THE SENSOR FROM CONDENSATION Waterpro...

Page 6: ...ts not supplied Part number Description Manufacture 767KS12 DC Power Plug Sealed IP68 Switchcraft 630125673867 Patch Cable Cap IP67 water and dust protection InstallerParts Lock Ring 12VDC GND Plug ha...

Page 7: ...cycle for 30 seconds The whole routine will then repeat after some idle time Final sensor readings are updated at the end of sampling cycle and remain the same until the next update see TRIGGER_INTEV...

Page 8: ...n Pin Name Type Description 1 3 3V Reference potential 3 3V Reference Voltage 2 GND Reference potential Local device ground 3 UART_TX Digital Output Firmware update interface 4 B D Bus In Out Driver o...

Page 9: ...te Single Register o 0x0F Write Multiple Coils o 0x10 Write Multiple Registers Exception messages supported Default address o RTU 50 o TCP IP 192 168 1 50 Input Registers Mode Read only size 16 bits N...

Page 10: ...ibration parameter TRIGGER_INTERVAL 20 0 Interval between Trigger measurements in seconds Writing a value greater than 0 to this register enables Trigger mode see Operating modes Writing a 0 to this r...

Page 11: ...rite size 1 bit Name Address Default Description ZERO_C2H4 4 False Request to zero C2H4 sensor ZERO_O2 5 False Request to zero O2 ZERO_CO2 6 False Request to zero CO2 sensor ZERO_CONF 7 False Confirma...

Page 12: ...ic discharge protection Follow the below steps carefully to ensure proper sensor installations Step 2 Apply even forces at both ends to pull the Filter Tube off connectors Step 4 Pull C2H4 sensor off...

Page 13: ...ove old C2H4 sensor from connector Plug in the new C2H4 sensor then push into socket push into socket Step 7 screw new O2 sensor into socket then plug in connector Step 8 Apply force to both ends gent...

Page 14: ...on typically involves a zero baseline and a span sensitivity calibration Zero calibration commonly uses zero gas such as 100 N2 while span calibration uses target gas for calibration Below are recomme...

Page 15: ...re to be covered only by the warranty of its manufacturer Felix Instruments will not be liable to the Buyer for loss damage or injury to persons or to property by the use of equipment manufactured by...

Page 16: ...ax _____________________________ Felix Instruments Serial Number s ________________________________________ Purchase Date _____________________Purchase Price _______________________ Your opinions will...

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