Sierra Multi-Trak 670S Manuale utente

Multi-Trak™

Model 670S Multi-Point Mass Flow Meter System

INSTRUCTION MANUAL

IM-Multipoint

Revision: B, April 2015

CORPORATE HEADQUARTERS

5 Harris Court, Building L Monterey, CA 93940

Phone (831) 373-0200 (800) 866-0200 Fax (831) 373-4402

www.sierrainstruments.com

EUROPE HEADQUARTERS

Bijlmansweid 2 1934RE Egmond aan den Hoef

The Netherlands

Phone +31 72 5071400 Fax +31 72 5071401

ASIA HEADQUARTERS

Rm. 618, Tomson Centre, Bldg A, 188 Zhang Yang Road

Pu Dong New District, Shanghai, P.R.China

Phone: + 8621 5879 8521 Fax: +8621 5879 8586

Sierra Instruments’ Instruction Manual Multi-Trak™ Model 670S

IMPORTANT CUSTOMER NOTICE

Sierra Instruments, Inc. is not liable for any damage or personal injury, whatsoever, resulting from

the use of Sierra Instruments standard mass flow meters or controllers for oxygen gas. You are

responsible for determining if this mass flow meter or controller is appropriate for your oxygen

application. You are responsible for cleaning the mass flow meter or controller to the degree

required for your oxygen flow application.

No part of this publication may be copied or distributed, transmitted, transcribed, stored in a

retrieval system, or translated into any human or computer language, in any form or by any

means, electronic, mechanical, manual, or otherwise, or disclosed to third parties without the

express written permission of Sierra Instruments. The information contained in this manual is

subject to change without notice.

TRADEMARKS

Multi-Trak™, Mult-Trak System™, Dry-Sense™, and Steel-Mass™ are trademarks of Sierra

Instruments, Inc. Other product and company names listed in this manual are trademarks or trade

names of their respective manufacturers.

Sierra Instruments’ Instruction Manual Multi-Trak™ Model 670S

Table of Contents

CHAPTER 1: INTRODUCTION .......................................................................................................4

Welcome to the Multi-Trak™....................................................................................................4

Safety Information.....................................................................................................................5

Receipt Of Your Instrument ......................................................................................................5

Definitions Used In This Manual...........................................................................................6

CHAPTER 2: INTRODUCTION TO THE MULTIPOINT ...................................................................7

CHAPTER 3: INSTALLATION .........................................................................................................8

Installation Guide.............................................................................................................9

Connecting Modbus Communication to Individual Model 640S Meters.......................9

Installation: Daisy Chaining the Units Together.....................................................10

Installation: Installing Into Duct Or Pipe ............................................................11

Installation Depth Of The 640S In The Duct

..............................................11

CHAPTER 4: SETTING UP THE MENU.........................................................................................12

Advanced Menu ...........................................................................................15

CHAPTER 5: TECHNICAL SUPPORT & SERVICE.......................................................................17

Technical Support ........................................................................................17

APPENDIX A: WARRANTY POLICY…………………………………………………..………………..18

Sierra Instruments’ Instruction Manual Multi-Trak™ Model 670S

CHAPTER 1: INTRODUCTION

Welcome to the Multi-Trak™

Sierra's Multi-Trak™ Model 670S is an advanced state-of-the-art instrument for measuring

mass flow rates in very large ducts or stacks that have non-uniform velocity profiles, high

turn-down requirements, dirty gas streams, wide temperature ranges and fast velocity and

temperature changes. The Model 670S dynamically compensates for changes in the flow

profile by using up to four independent mass flow sensing points to measure the

instantaneous average gas mass flow velocity. The Multi-Trak™ is commonly used in

petrochemical refining, coal-fired electric power generation, steel manufacturing and many

other industrial processes that face the challenge of accurate and repeatable gas mass flow

measurement in very large pipes or ducts.

An innovative, versatile and user-friendly microprocessor-based Human Machine Interface

(HMI) controls all functions of the Multi-Trak™ system. The HMI is used to collect, visualize

and store flow data, as well as set up the individual sensor points, thus allowing the entire

system to be easily configured in the field. The Model 670S’HMI integrates the functions of

flow measurement, flow-range adjustment, field validation and diagnostics, and displays

mass flow rate and totalized flow, as well as other configuration variables. All of this data is

easily programmable from the HMI's easy-to-use touch screen.

Unlike single probe insertion sensors where each sensor point is on the same insertion

probe, each Model 670S sensor point is completely independent of the others, allowing for

easy field swap-out or cleaning of individual transmitters.

The Multi-Trak™ offers a variety of features for ease of operation.

Averages the flow of 2-4 meters

Convert units f.i. for NLPS to SLPH

Setup density of the gas for mass flow measurement

Setup of the individual meters

Easy setup of the HMI system

Alarm setup

Touch screen operated

And many more…visit www.sierrainstruments.com

Sierra Instruments’ Instruction Manual Multi-Trak™ Model 670S

SAFETY INFORMATION

Caution and warning statements are used throughout this manual to draw your attention to

important information.

RECEIPT OF YOUR INSTRUMENT

When receiving the instrument, carefully check the outside packing carton for damage that may

have incurred during shipment. If the carton is damaged, notify the local carrier and submit a

report to the factory or distributor. Remove the packing slip and check that all ordered

components are present and match your specifications (as ordered). Do not return any equipment

to the factory without first contacting Technical Support Center.

Warning!

Caution!

This statement appears with information

that is important to protect people and

equipment from damage. Pay very close

attention to all warnings that apply to

your application.

This statement appears with information

that is important for protecting your

equipment and performance. Read and

follow all cautions that apply to your

application.

Sierra Instruments’ Instruction Manual Multi-Trak™ Model 670S

DEFINITIONS USED IN THIS MANUAL

The following terms are used frequently in this manual. They are presented here with

their definitions for your information.

FFS = Factory full scale of the 640S meter

UFS = User full scale of the 640S meter

HMI = Human machine interface

Note: It is recommended to you read:

“Sierra Steel-Mass™ Model 640S Insertion Mass Flow Meter Instruction Manual.”

Sierra Instruments’ Instruction Manual Multi-Trak™ Model 670S

CHAPTER 2: INTRODUCTION TO THE MULTIPOINT

The Multi-Trak™is used for bigger pipes to dynamically compensate for changes in the flow

profile due to changes in flow. The basic principle is that flow is measured at several locations in

the pipe, then those points are added together and divided by the number of points to get the

grand-average flow rate.

Multi-Trak™ consists of:

-4 x 640S meters with Modbus. (see Sierrainstruments.com for

-information about Model 640S meters)

-1 x Control box, with HMI and 4-20mA/0-5V output module.

-3 x cable’s (power, output 4-20mA/0-5V, cable for daisy chaining

-the 640S meters)

In the default mode the four models of the 640S are added together

and divided by four, but the operator can turn units On or Off.

For example, if one unit is turned off the average is divided by three.

Each unit and total average can have a multiplication factor

(the default is 1.00):

XtotAverage 4Flow4X4Flow3X3Flow2X2Flow1X1

Figure 1: Sierra Instruments’Multi-Trak™Demo

Sierra Instruments’ Instruction Manual Multi-Trak™ Model 670S

CHAPTER 3: INSTALLATION

Wiring: The Multi-Trak™ requires 24VDC approximately 2A.

Figure 2: Wiring Ports on the HMI

All three connectors are different; they

are keyed differently to prevent

mistakes.

The middle connector is the 24 VDC

Power supply in.

The left connector is 4-20mA

output with the grand-average

flow rate. This is an active

output; do not apply loop

power.

The right connector is for

daisy chaining the 640

meters. This is a 4-wire daisy

chain: two wires for the power

supply and two wires for the

modbus communication.

Figure 3: Pinouts of the HMI

24VDC in

Output 4-20mA

24VDC out and Modbus A and B

Sierra Instruments’ Instruction Manual Multi-Trak™ Model 670S

Installation Guide

DC Power Wiring Individual Model 640S Meters

The DC power wire size must be 18 to 19 AWG with the wire stripped 1/4 inch (6 mm). Connect to

the terminals marked (1) PWR+ and PWR(2)–on the terminal block. Torque all connections to

4.43 to 5.31 in-lbs (0.5 to 0.6 Nm).

All EEx installations must use an approved EEx fitting at both cable entries into the enclosure. If

conduit seals are used, they must be installed within 18 inches of the enclosure.

Figure 4: DC Power Wiring

Connecting Modbus Communication to Individual Model 640S Meters

After opening the enclosure, the modbus communication TB is visible on the right side.

Figure 5: Modbus Wiring

Sierra Instruments’ Instruction Manual Multi-Trak™ Model 670S

Installation: Daisy Chaining the Units Together

Daisy chain the cable with the 4 x 640S meters as shown in the picture below and tighten the

cable glands:

Figure 6: Daisy Chaining of 640S Units

Make sure that the last 640S meter (#4) has a terminator

resistor between the yellow and green wire.

Daisy chain the modbus A and B for all four 640S meters to the connector of the HMI. The shield

of the cable can be connected to the connector pin called shield (See Figure 2) and to the

modbus communication print number 3 of the 3 way terminal.

The RS485 is an optical isolated interface. Don’t connect the RS485 shield to ground

of the power supply unless the isolated interface isn’t required.

NOTE: The communication cable can not be longer then 1200m.

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