Accusafe Sensor Module User Manual 1 06/21/2021
Table of Contents
Section 1 - Introduction...................................................................................................................................... 2
1.1 Important Safeguards .............................................................................................................................. 2
1.2 Accusafe F901B Sensor Specifications..................................................................................................... 3
1.2.1 Sensor MODULE Configuration......................................................................................................... 3
Section 2 - Installation ........................................................................................................................................ 4
2.1 Enclosure Wall Mounting......................................................................................................................... 4
2.2 Wiring and Pneumatic Connections ........................................................................................................ 4
2.1.1 Power and MODBUS connections .................................................................................................... 4
2.1.2 Pneumatic connections..................................................................................................................... 5
Section 3 - Operation.......................................................................................................................................... 7
3.1 Pump & Sensor Operation....................................................................................................................... 7
3.2 MODBUS Operation................................................................................................................................. 7
3.2.1 RTU RS485 Configuration.................................................................................................................. 8
3.2.2 F-901B MODBUS Specifications........................................................................................................ 9
3.2.3 Input Registers.................................................................................................................................. 9
3.2.4 Holding Registers ............................................................................................................................ 10
3.2.5 Coils................................................................................................................................................. 10
Section 4 - Calibration....................................................................................................................................... 12
4.1 Zero Calibration ..................................................................................................................................... 12
4.1.1 Zero Calibration Procedure............................................................................................................. 13
4.2 Span Calibration..................................................................................................................................... 15
4.2.1 Gas Calibration Procedure......................................................................................................... 15
4.2.2 Digital Calibration Procedure.......................................................................................................... 18
Section 5 - Maintenance of the F-901B............................................................................................................ 20
5.1 Replacing the Gas Sensor....................................................................................................................... 20
5.2 Particulate Filter Maintenance .............................................................................................................. 21
Section 6 –Sensor Module Tester App............................................................................................................. 22
Section 7 - Warranty......................................................................................................................................... 25