Sierra Multi-Trak 670S Bedienungsanleitung

MultiTrak™

670S Multi-Point Mass Flow Meter System

INSTRUCTION MANUAL

IM-Multipoint

Revision: D, July 2019

CORPORATE HEADQUARTERS

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

www.sierrainstruments.com

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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 MultiTrak™ 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

MultiTrak™, MultTrak System™, DrySense™, and SteelMass® 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 MultiTrak™ 670S

Table of Contents

Chapter 1: Introduction.....................................................................................................................4

Chapter 2: Introduction to The Multipoint ..........................................................................................7

Chapter 3: Installation .......................................................................................................................8

Chapter 4: Setting Up The Menu.....................................................................................................12

Chapter 5: Technical Support & Service .........................................................................................17

Appendix A: Warranty Policy...........................................................................................................18

Sierra Instruments’ Instruction Manual MultiTrak™ 670S

Chapter 1: Introduction

Welcome to the MultiTrak™

Sierra's MultiTrak™ 670Sis 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 670Sdynamically 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 MultiTrak™ 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 MultiTrak™ system. The HMI collects velocity data from

the 4 flow meters using Modbus communication. The HMI will 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. The processed flow data is then

made available as an analog 4-20 mA. or 0-5 Volt output signal to connect to your process.

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

probe, each 670Ssensor point is completely independent of the others, allowing for easy

field swap-out or cleaning of individual transmitters.

The MultiTrak™ offers a variety of features for ease of operation.

✓Averages the flow of 4 meters

✓Convert engineering units in LCD menu

✓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 MultiTrak™ 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 MultiTrak™ 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

Modbus-RTU = A standard digital communication protocol using RS485

Note: For information about the meters it is recommended to you read:

Steel-Mass™ Model 640S Insertion Mass Flow Meter Instruction Manual

http://www.sierrainstruments.com/userfiles/file/manuals/640s-instruction-manual.pdf

The 670 can also be built using 4 620S Fast Flow light industrial Thermal insertion flow

meters. The 620s is electrically identical to the 640S, but uses lighter duty 3/8 inch

diameter probes.

FastFlo™Model 620S Insertion Mass Flow Meter Instruction Manual

http://www.sierrainstruments.com/userfiles/file/manuals/620s-instruction-manual.pdf

Sierra Instruments’ Instruction Manual MultiTrak™ 670S

Chapter 2: Introduction to The Multipoint

The MultiTrak™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.

MultiTrak™ 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’MultiTrak™Demo

Sierra Instruments’ Instruction Manual MultiTrak™ 670S

Chapter 3: Installation

Installation Depth of the 640S in the Duct

If you don’t know the flow profile or you are not familiar on how to determine the flow profile, there

is a basic rule on how to set the depth of the 640S meters in the duct.

Be aware that this might not be the most accurate way for your application, knowing the

flow profile and install according to that profile is preferred

Divide the duct in four equal quadrants. Insert the middle of the sensors of the probe to 0.15 x D

(D=diameter of the duct) into the duct. Make sure that the probes are turned 90º from each other.

See picture below.

Although a MultiTrak™ theoretically compensates for distorted flow profiles it is recommended

that there be as much straight length of pipe possible before the measurement point.

Sierra Instruments’ Instruction Manual MultiTrak™ 670S

Wiring of the HMI and 640S flow meters

The MultiTrak™ 670 requires 24VDC at approximately 2A that will be used to power the HMI and

the four 640S meters.

Analog Outputs

640S Power & Data

24 VDC Power

Figure 2: Wiring Ports on the HMI

Figure 3: Pin-outs of the HMI & Wire colors

Sierra Instruments’ Instruction Manual MultiTrak™ 670S

Cables

When ordering the 670 you will need to complete the “Multipoint ADS Cable

Configuration”sheet so we can pre-build the cables for your application to the lengths

you need.

Cable A –From HMI averaged 4-20 mA/0-5 volt signals to your system

White –4-20 mA. output (active)

Black –Output Common

Red –0-5 Volt Output

Cable B –Customer supplied 24 VDC power supply to power the HMI and 640S meters

Black –24 VDC Minus

Red –24 VDC Plus

Cable C –From HMI to 640S #1

Cable D –From 640S #1 to #2.

Cable E –From 640S #2 to #3.

Cable F –From 640S #3 to #4, terminator resistor on Modbus wires.

These are assembled as one continuous cable.

The wire colors are:

Red/Purple +24 VDC

Black/Blue -24VDC

Green –Modbus (A)

Yellow + Modbus (B)

Daisy chain the DC Power & Modbus Wiring to the Individual 640S Meters

The provided cables C through F are used to supply power and collect the flow data from the 4

640S meters using Modbus. Connect all 4 meters as shown below. Note the last meter will have a

terminator resistor across the A & B Modbus terminals supplied with the cables.

Daisy chain the C through F cable assembly to the 4 x 640S meters as shown in the picture

below and tighten the cable glands:

Figure 6: Daisy Chaining of 640S Units

Cable D

Cable E

Cable F

640S #1

640S #3

640S #2

640S #4

Cable C

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