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F-901B Reference Manual 

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IMPORTANT SAFEGUARDS  

To reduce the risk of fire, electrical shock, injury to persons or permanent damage to this device, 
these safety precautions should always be followed:  

 

Use  the  included  12VDC  power  supply  or  specified  power  connector  to  operate  this  device. 
Inappropriate voltage supply or power connector could cause irreparable damage to this device. 
See 

Cables Assembly

. 

 

Make sure power plug and Modbus cable are plugged  in and secured before powering up the 
device. Power connector will not make connection to GND if not fully plugged into the 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 

Cables and Tubes Installation

. 

 

Do not operate  the device  with an obstructed  flow path. Obstruction during air sampling will 
damage the internal micropump.  

 

Do not expose this device to any liquids.  

 

Sensors  must  not  be  exposed  to  temperature,  humidity  and  pressure  that  are  outside  the 
operating range. See sensor 

Specifications

. 

 

Lifetime of up to 2 years for C2H4/O2 sensor and 5 years for CO2 sensor can be expected for 
discontinuous sampling. Continuous exposure  to relative humidity >90% or <15% and Volatile 
Organic Compounds (VOCs) over a long period of time must be avoided. See 

Operating mode

 

 

 

 

Содержание F-901B

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

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