Honeywell SmartLine ST 800 User Manual (English)

Bradley EvansAug 5, 2025

What to do if Honeywell SmartLine ST 800 Transmitter shows Meter Body Comm fault?

P
pcampbellAug 5, 2025
If the Honeywell Transmitter displays a Meter Body Comm fault, it indicates that communication between the meter body and the electronics module has failed. Here's what you should do: * First, check the ribbon cable connecting the meter body to the electronics module to ensure it’s securely plugged in. * Verify that all pins are properly connected within the connector. * Next, cycle power to the transmitter. If the problem persists, replace the electronics module. If replacing the electronics module doesn't resolve the issue, then replace the meter body.

Housing Material	Aluminum or Stainless Steel
Type	Transmitter
Output Signal	4-20 mA HART
Communication Protocol	HART
Ambient Temperature	-40 to 185 °F (-40 to 85 °C)
Hazardous Area Approvals	ATEX, IECEx, FM, CSA
Process Connection	1/2" NPT
Enclosure Rating	NEMA 4X, IP66

Housing Material

Aluminum or Stainless Steel

Type

Transmitter

Output Signal

4-20 mA HART

Communication Protocol

HART

Ambient Temperature

-40 to 185 °F (-40 to 85 °C)

Hazardous Area Approvals

ATEX, IECEx, FM, CSA

Process Connection

1/2" NPT

Enclosure Rating

NEMA 4X, IP66

Summary

About This Manual

Release Information

Details revisions made to the ST 800 SmartLine Pressure Transmitters User's Manual.

1 Introduction

1.1 Overview

Provides an introduction to the physical and functional characteristics of Honeywell's ST 800 SmartLine pressure transmitters.

1.2 Features and Options

Details the various models, protocols, HMI, materials, approvals, and mounting options for the ST 800 transmitter.

1.3 ST 800 Transmitter Name Plate

Explains the information found on the transmitter nameplate, including model number and configuration details.

1.4 Safety Certification Information

Describes the location and content of the approvals name plate, detailing transmitter compliance information.

1.5 Transmitter Adjustments

Outlines how to perform zero and span adjustments using the optional three-button assembly or other tools.

1.6 Display Options

Lists and describes the characteristics of the available basic, standard, and advanced display options for the transmitter.

1.7 Optional 3-Button Assembly

Details the features and capabilities provided by the optional external three-button assembly for transmitter operation.

2 Application Design

2.1 Overview

Discusses considerations for deploying a Honeywell ST 800 SmartLine pressure transmitter in a process system.

2.1.1 Accuracy

Explains how the ST 800 transmitter measures and reports process pressure accurately.

2.1.2 Diagnostic Messages

Covers the critical and non-critical diagnostic messages reported by the transmitter to indicate operational status.

2.1.3 Safety Integrity Level (SIL)

Addresses the ST800's intended integrity against systematic errors and its use in Safety Instrumented Functions.

2.1.4 Plugged Impulse Line detection (PILD)

Describes the PILD option that indicates a plugged impulse line or process connection through diagnostic signals.

3 Installation and Startup

3.1 Installation Site Evaluation

Guides the evaluation of the installation site considering environmental conditions and potential noise sources.

3.2 Honeywell Versatilis Configurator

Introduces the HVC as a handheld solution for configuring, calibrating, monitoring, and diagnosing field devices.

3.3 Display Installation Precautions

Provides precautions regarding display readability and update rates at temperature extremes.

3.4 Mounting ST 800 SmartLine pressure transmitters

Covers mounting procedures for various transmitter models, including bracket and flange installations.

3.5 Piping the ST 800 Transmitter

Details piping arrangements, suggested locations, and guidelines for connecting the transmitter to the process.

3.6 Wiring a Transmitter

Explains the procedures for wiring the transmitter, including loop wiring, lightning protection, and supply voltage requirements.

3.7 Startup

Outlines typical startup tasks, including checking inputs/outputs and applying process pressure for the transmitter.

4 Operation

4.1 Overview

Covers information and processes for Digitally Enhanced (DE) and HART operation using the three-button option.

4.2 Three-Button Operation

Explains the user interface and operational capabilities provided by the optional three-button interface.

4.2.1 Menu Navigation

Details how to navigate through menus using the three-button interface for configuration and adjustments.

4.2.2 Data Entry

Describes the process for entering data, selecting characters/digits, and editing numeric values using the buttons.

4.2.3 Editing a Numeric Value

Explains the step-by-step process for editing numeric values on the transmitter display.

4.2.4 Selecting a new setting from a list of choices

Guides users on how to select new settings for parameters that present a list of available choices.

4.2.5 The Advanced Display Menus

Organizes the advanced display menus into three levels, detailing diagnostics, setup, calibration, and information options.

4.2.7 The Basic Display Menu

Describes the basic display menu, including LCD contrast, PV display, and units configuration.

4.2.8 Selecting a new setting from a list of choices

Provides a procedure for selecting new settings from parameter lists, applicable to PV Display and Pressure Units.

4.3 Three Button Operation with no display Installed

Explains how to perform Zero and Span adjustments without an installed display using the three-button interface.

4.3.1 Zero Adjustment

Details the procedure for performing a zero adjustment equivalent to setting the LRV on the display.

4.3.2 Span Adjustment

Details the procedure for performing a span adjustment equivalent to setting the URV on the display.

4.4 Changing the Default Failsafe Direction

Details how to change the failsafe direction from upscale to downscale by moving a jumper.

4.5 Monitoring the Basic, Standard and Advanced Displays

Explains how to monitor information shown on the operator screens of the advanced and basic displays.

5 Maintenance

5.1 Overview

Provides information on preventive maintenance and replacing damaged parts for the transmitter.

5.2 Preventive Maintenance Practices and Schedules

Recommends typical inspection and maintenance routines based on process medium characteristics.

5.3 Inspecting and Cleaning Barrier Diaphragms

Guides on inspecting and cleaning barrier diaphragms to prevent faulty measurements caused by sediment.

5.4 Replacing the Communication Module

Details the procedure for replacing the communication module, including connectors and cable alignment.

5.5 Replacing the Meter Body

Explains how to replace the complete meter body or just the meter body using existing process heads.

5.6 PILD Option Licensing

Describes the process for obtaining and activating a license to enable the PILD option for the transmitter.

6 Calibration

6.1 Recommendations for Transmitter Calibration

Advises against periodic calibration, recommending removal from service and controlled environment calibration.

6.2 Calibration Procedures

Covers calibration procedures for analog mode transmitters using handheld communicators or local displays.

7 Troubleshooting

7.1 Overview

Discusses responding to error messages, primarily displayed by the HVC, and identifying critical conditions.

7.2 Critical Diagnostics Screens

Explains how critical diagnostics are displayed and provides a table of fault conditions and corrective actions.

8 Parts List

8.1 Overview

Lists individually saleable parts for transmitter models, identified by part number and key number.

9 PRODUCT CERTIFICATIONS

9.1 Safety Instrumented Systems (SIS) Installations

Refers to the Safety Manual for installation procedures and system requirements for safety certified installations.

9.2 European Directive Information (CE Mark)

Presents the EU Declaration of Conformity for ST 800 and ST 700 Series Pressure Transmitters.

9.3 Hazardous Locations Certifications

Details hazardous location certifications (FM, CSA, ATEX, IECEx, SAEx, INMETRO, NEPSI, EAC, KOSHA) by agency and protection type.

9.4 Control Drawing

Provides control drawing information and associated parameters for HART/DE and Foundation Fieldbus/PROFIBUS protocols.

9.5 Marine Approvals

Lists marine approvals from ABS, BV, DNV, KR, and LR for the ST 800 pressure transmitter family.

9.6 Measurement Instruments Directive (MID)

Details MID certification, including mechanical class, electromagnetic environment, and pressure ranges for ST 800 models.

9.7 Recycling and disposal of product

Advises on considering recycling and proper disposal of the product and packaging materials according to regulations.

Honeywell SmartLine ST 800 User Manual

Table of Contents

Questions and Answers:

Honeywell SmartLine ST 800 Specifications