ABB 266CSH User Manual

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ABB MEASUREMENT & ANALYTICS | OPERATING INSTRUCTION
266CRH / 266CRT, 266CSH / 266CST
Multivariable pressure transmitter
With Modbus communication
Measurement made easy
Introduction
The multivariable transmitters in the 266CRH/CRT,
266CSH/CST are used for differential pressure flow
measurements.
Apart from pressure- and / or temperature-
dependent changes to the density of the fluid, the
parameters such as the discharge coefficient,
thermal expansion of pipelines and primary device
and the Reynolds number are also corrected. It can
also be used for DP level measurement if density
compensation is necessary due to process
temperature changes.
This could make any level measurement much more
reliable.
In addition to high precision, the multivariable 266
also offers the advantage that only a single device
needs to be used for the measuring point instead of
several transmitters and a flow calculator.
For more information
Additional documentation on 266CRH / 266CRT,
266CSH / 266CST is available for download free of
charge at www.abb.com/pressure.
Alternatively simply scan this code:

ABB 266CSH Specifications

General

Ambient Temperature	-40 to 85°C (-40 to 185°F)
Power Supply	10.5 to 45 V DC
Housing Material	Aluminum or Stainless Steel
Operating Temperature	-40 to 85°C (-40 to 185°F)
Type	Pressure Transmitter
Output Signal	4 to 20 mA with HART
Process Temperature	-40 to 120 °C (-40 to 248 °F)
Protection Class	IP66, IP67
Process Connection	1/2" NPT
Electrical Connection	1/2 - 14 NPT, M20 x 1.5
Material	316L SST, Hastelloy C-276
Protection Rating	IP66, IP67

Summary

Safety

General Information and Instructions

Important product information and retention advice.

Warnings

Explains the meaning of DANGER, WARNING, CAUTION, NOTICE.

Intended Use

Intended Use

Specifies the purpose of the multivariable pressure transmitters.

Use in Potentially Explosive Atmospheres

Ex Marking

Details ATEX, IECEx, and FM certifications for hazardous locations.

Ex Explosion Protection Aspects (Europe and International)

Ex Explosion Protection Aspects (United States and Canada)

Type of Protection: 'Explosion-proof' Certification (Code ET)

Product Identification

Name Plate

Explains the information found on the device's rating plate and special data plates.

Installation

Mounting

General considerations and requirements before installing the transmitter.

Venting / Draining Transmitters Without Diaphragm Seals

Mounting Position

Guidance on optimal transmitter orientation and potential zero point offsets.

Opening and Closing the Housing

Adjusting the Transmitter Position

Instructions for rotating the transmitter housing for better visibility.

Rotate the LCD Display

Connecting Impulse Lines

Safety and procedural guidelines for connecting impulse lines.

Process Connections

Mounting Recommendations

Guidance on arranging impulse lines for steam/liquid flow measurements.

Mounting Recommendations

Fill Level Measurement on Closed Tanks

Fill Level Measurement on Open Tanks with Fluids

Mounting and connection for level measurement in open tanks.

Fill Level Measurement on the Steam Boiler (Drum Water Level)

Electrical Connections

Safety Instructions for Electrical Installation

Crucial safety warnings and precautions for electrical hookup.

Installing the Connecting Cables

Procedure for installing cables, including drip loops.

Cable Entries

Safety Instructions for Use in Division 1

Specific safety guidelines for hazardous area installations (Division 1).

Grounding

Requirements and methods for proper grounding of the transmitter housing.

Electrical Connection

Details terminal assignments for power supply and communication.

Connection on the Device

Commissioning

General Notes

Zero Point Correction Following Installation

Procedure to check and correct the transmitter's zero point after installation.

DIP Switches on the Secondary Electronics

Parameterization of the Device

Configuration Via the LCD Indicator With the Operating Buttons (Optional)

Configuration With the PC / Laptop

Operation

Safety Instructions

Safety precautions for operating the device.

Menu Navigation

Menu Levels

Error Messages on the LCD Display

Switching to the Configuration Level (Parameterization)

Steps to access configuration level and set access privileges.

Selecting and Changing Parameters

Overview of Parameters on the Configuration Level

Overview of Parameters on the Configuration Level

Damping and Transmission Function

Transmission Function

Interface Description

Communication Parameters

Modbus Message

Modbus Register Tables

16 / 32 bit-Register

16 / 32 bit-Register

Coil Register

Application of the Diagnosis Main and Main 2 Registers

Diagnosis / Error Messages

Calling Up the Error Description

Steps to access detailed error information via the operator menu.

Error States and Alarms

Error States and Alarms

Lists final error codes, causes, and recommended measures.

Maintenance

Repair

Safety Instructions

Safety warnings for disassembly and repair procedures.

Opening and Closing the Housing

Replacing the Measuring Cell

Specification

Operating Limits 266CRx

Operating Limits 266CSx

Static Pressure Limits