Emerson Hart Rosemount 935 Reference Manual
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Emerson Hart Rosemount 935 Reference Manual

Open path gas detector
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Reference Manual
00809-0300-4035, Rev AA
October 2021
®
HART
Communication
™
Rosemount
935 Open Path Gas Detector

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Summary of Contents for Emerson Hart Rosemount 935

  • Page 1 Reference Manual 00809-0300-4035, Rev AA October 2021 ® HART Communication ™ Rosemount 935 Open Path Gas Detector...

  • Page 3: Table Of Contents

    Reference Manual Contents 00809-0300-4035 October 2021 Contents Chapter 1 Introduction......................5 ® Chapter 2 Connecting to the HART Communicator..............7 ® 2.1 Connect HART Communicator to wiring terminals..............7 ® 2.2 Connect HART Communicator to intrinsically safe (IS) port............8 ® 2.3 Connecting two HART Communicators (primary and secondary master)........
  • Page 4 Contents Reference Manual October 2021 00809-0300-4035 Emerson.com/Rosemount...

  • Page 5: Chapter 1 Introduction

    Reference Manual Introduction 00809-0300-4035 October 2021 Introduction Using digital communication with the Rosemount Rosemount 935 Open Path Detector, the operator can monitor the status of the detector, determine factory settings, and initiate field tests. ® This document provides guidance for establishing HART communication and describes the HART menu structure when using the detector with a HART Hand-held Communicator, personal computer (PC), or other process interface device that supports...
  • Page 6 Introduction Reference Manual October 2021 00809-0300-4035 Emerson.com/Rosemount...

  • Page 7: Connectingto The Hart Communicator

    ® Reference Manual Connectingto the HART Communicator 00809-0300-4035 October 2021 ® Connectingto the HART Communicator The host connects to the detector via the two-wire 4-20 mA current loop or via the intrinsically safe (IS) port. Refer to the Rosemount Rosemount 935 Reference Manual for connection details.

  • Page 8: Connect Hart ® Communicator To Intrinsically Safe (Is) Port

    If the HART Communicator finds the detector, it displays the Main Menu. Postrequisites If the HART Communicator doesn't find the detector, check the connections and verify the presence of a 500 ohms load resistance in series to the loop. Emerson.com/Rosemount...

  • Page 9: Connecting Two Hart ® Communicators (Primary And Secondary Master)

    ® Reference Manual Connectingto the HART Communicator 00809-0300-4035 October 2021 ® Connecting two HART Communicators (primary and secondary master) A. Rosemount Rosemount 935 Gas Detector B. 4-20 out C. 4-20 mA current D. Load resistor, defined in HART standard as 250-600 ohm E.
  • Page 10 ® Connectingto the HART Communicator Reference Manual October 2021 00809-0300-4035 Emerson.com/Rosemount...
  • Page 11 ® Reference Manual HART device description language (DDL) 00809-0300-4035 October 2021 ® HART device description language (DDL) The HART protocol incorporates a concept called the DDL that enables all suppliers of HART instruments to define and document their products in a single, consistent format. This format can be read by hand-held communicators, personal computers (PCs), and other process interface devices, regardless of manufacturer, allowing full functionality from any HART device.

  • Page 12: Hart ® Device Description Language (Ddl)

    ® HART device description language (DDL) Reference Manual October 2021 00809-0300-4035 Emerson.com/Rosemount...
  • Page 13 ® Reference Manual HART menu structure 00809-0300-4035 October 2021 ® HART menu structure Overview menu ® When you first establish HART communication, the first menu displayed is the Overview menu. Figure 4-1: Overview Menu Structure Overview 1. Device Status 2. Analog Output Value 3.

  • Page 14: Hart Menu Structure

    5. View All 1. Primary 1. Analog Variables Variable Output Value 2. Analog Output (Gauge) 1. Secondary 1. Electronics Variable Temperature 2. Electronics Temperature (Gauge) 3. Third 1. Supply Variable Voltage 2. Supply Voltage (Gauge) 4. Fourth 1. Heater State Variable Emerson.com/Rosemount...

  • Page 15: Overview Menu

    ® Reference Manual HART menu structure 00809-0300-4035 October 2021 6. Device 1. Detection Summary 2. Detector Gas Status 3. Electronics Temperature 4. Supply Voltage 5. Heater Slate 6. Heater Control 7. Operating Time 8. Signal 9. Reference 10. NQ Ratio 11.
  • Page 16 Descriptor Text associated with the field device that Read can be used by the operator in any way. Message Text associated with the field device that Read can be used by the operator in any way. Emerson.com/Rosemount...
  • Page 17 ® Reference Manual HART menu structure 00809-0300-4035 October 2021 Revision Numbers menu Table 4-5: Revision Numbers Menu Options Number Option Description Field type ® Universal rev HART protocol revision. Example: 7 Read Fld dev rev Field device revision. Example: 1 Read Software rev Field device software revision.
  • Page 18 Signal Signal reading. Read Reference Reference signal reading. Read NQ Ratio Normalized ratio. Read Gain Detector's current amplifying level. Read Gas Type Ethylene, methane, or propane. Read Full Scale Ethylene: 8 LEL*M Read Methane and propane: 5 LEL*M Emerson.com/Rosemount...

  • Page 19: Configure Menu

    ® Reference Manual HART menu structure 00809-0300-4035 October 2021 Configure menu Figure 4-2: Configure Menu Structure Configure 1. Guided Setup 1. Initial Setup 1. Configure Device 2. Optional 1. Gas Type Setup 2. Heater Mode Setting 3. Loop Current Mode 2.
  • Page 20 4. Revision 1. Universal revision Numbers 2. Field device revision 3. Software revision 4. Hardware revision 5. Device Driver Revision Table 4-12: Configure Menu Options Number Option Description Field type Guided Setup Guided setup Menu Manual Setup Manual setup Menu Emerson.com/Rosemount...
  • Page 21 ® Reference Manual HART menu structure 00809-0300-4035 October 2021 4.2.1 Guided Setupmenu Table 4-13: Guided Setup Menu Options Number Option Description Field type Initial Setup Detector's initial setup Menu Optional Setup Detector's optional setup Menu Initial Setup menu Table 4-14: Initial Setup Menu Options Number Option Description Field type...
  • Page 22 Change Polling Change detector's HART polling address. Method Address Device Information menu Table 4-21: Device Information Options Number Option Description Field type Device Model Rosemount 935 Read Device Device identification Menu Identification Information Information Menu Revision Numbers Revision numbers Menu Emerson.com/Rosemount...
  • Page 23 ® Reference Manual HART menu structure 00809-0300-4035 October 2021 Device Identification menu Table 4-22: Device Identification Menu Options Number Option Description Type Text that is associated with the field device Read/Write installation (8 characters). The operator can modify and use this text in any way. Long Tag Text that is associated with the field device Read/Write...

  • Page 24: Service Tools Menu

    9. Detector Gas Status 10. Detector Fault Number 11. Detector’s Gain 12. Reference Signal 13. Detector’s Signal 14. Ration 15. NQ Ration 16. Reference to Noise Ratio 17. Signal to Noise Ratio 18. Gas Detection Value 19. Electronics Temperature 20. Input Voltage Emerson.com/Rosemount...
  • Page 25 ® Reference Manual HART menu structure 00809-0300-4035 October 2021 Table 4-25: Service Tools Menu Options Number Option Description Field type Status Detector status Method Device Variables Device variables Menu Calibration Calibration Method Log Data Get and view log data Menu 4.3.1 Device Variables menu Table 4-26: Device Variables Menu Options...
  • Page 26 Signal to noise ratio (SNR) calculation on Read Ratio reference signal. Signal to Noise Ratio SNR calculation on signal. Read Gas Detection Value Gas reading in LEL*M. Read Internal Detector's internal temperature in degrees Read Temperature Internal Voltage Detector's actual supply voltage. Read Emerson.com/Rosemount...

  • Page 27: Statuses

    ® Reference Manual HART menu structure 00809-0300-4035 October 2021 Statuses Status code Description (state of the problem) Category Recommended action Searching for signal Failed Check optical alignment and source. Parameter fault Failed Send for repair. Internal electrical fault Failed Send for repair. Internal electrical fault Failed Send for repair.
  • Page 28 2021 Emerson. All rights reserved. Emerson Terms and Conditions of Sale are available upon request. The Emerson logo is a trademark and service mark of Emerson Electric Co. Rosemount is a mark of one of the Emerson family of companies. All other marks are the property...

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