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Flexim FLUXUS G831ST-HT Operating Instruction

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Operating instruction
FLUXUS G831ST-HT
UMFLUXUS_G831ST-HTV1-0EN

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Summary of Contents for Flexim FLUXUS G831ST-HT

  • Page 1 Operating instruction FLUXUS G831ST-HT UMFLUXUS_G831ST-HTV1-0EN...
  • Page 2 FLUXUS is a registered trademark of FLEXIM GmbH. FLEXIM GmbH Boxberger Straße 4 12681 Berlin Germany Tel.: +49 (30) 936 67 660 Fax: +49 (30) 936 67 680 E-mail: info@flexim.com www.flexim.com Operating instruction for FLUXUS G831ST-HT UMFLUXUS_G831ST-HTV1-0EN, 2021-06-01 Article number: 22811 Copyright (©) FLEXIM GmbH 2021...

  • Page 3: Table Of Contents

    FLUXUS G831ST-HT Table of contents Table of contents Introduction ................7 Safety instructions .
  • Page 4 Table of contents FLUXUS G831ST-HT Measurement ................74 Parameter input .
  • Page 5 FLUXUS G831ST-HT Table of contents Advanced functions ..............121 17.1...
  • Page 6 Table of contents FLUXUS G831ST-HT 2021-06-01, UMFLUXUS_G831ST-HTV1-0EN...

  • Page 7: Introduction

    Copyright The contents of this operating instruction are subject to changes without prior notice. All rights reserved. No part of this operating instruction may be reproduced in any form without FLEXIM's written permission. UMFLUXUS_G831ST-HTV1-0EN, 2021-06-01...

  • Page 8: Safety Instructions

    The measuring equipment has to be checked for proper condition and operational safety before each use. If troubles or damages have occurred during installation or operation of the measuring equipment, please inform FLEXIM. It is not allowed to make unauthorized modifications or alterations to the measuring equipment.

  • Page 9: Intended Use

    • With the exceptions stated in chapter 11, the measuring equipment is maintenance-free. Any components and spare parts may only be replaced by FLEXIM. The operator shall carry out periodic checks for changes or damages that can present a danger. For further information, contact FLEXIM.

  • Page 10: Safety Instructions For Electrical Work

    • The module must not be removed from the housing. The transmitter does not contain any components to be maintained by the user. For repair and service work, please contact FLEXIM. • Observe the safety and accident prevention regulations for electrical systems and equipment.

  • Page 11: Safety Instructions For Transport

    → Wear the required personal protective equipment. → Observe the applicable rules. • If you detect a transport damage when unpacking the delivery, please contact the supplier or FLEXIM immediately. • The transmitter is a sensitive electronic measuring instrument. Avoid shocks or impacts.

  • Page 12: General Principles

    3 General principles 3.1 Measurement principle FLUXUS G831ST-HT General principles In the ultrasonic flow measurement, the flow velocity of the fluid in a pipe is determined. Further physical quantities are derived from the flow velocity and from additional physical quantities, if necessary.
  • Page 13 3 General principles FLUXUS G831ST-HT 3.1 Measurement principle 3.1.2 Measurement of the flow velocity The flow velocity of the fluid is measured using the correlation principle. 2 pairs of ultrasonic transducers of the same type are mounted one after the other at a distance Δx on the pipe which is completely filled with the fluid. The transducer pairs form the measuring barriers A and B.

  • Page 14: Measurement Arrangements

    3 General principles 3.2 Measurement arrangements FLUXUS G831ST-HT Measurement arrangements 3.2.1 Terms The transducers of a measuring barrier are mounted on opposite sides of the pipe. Sound path The distance covered by the ultrasonic signal of a transducer pair after crossing the pipe once.

  • Page 15: Acoustic Penetration

    3 General principles FLUXUS G831ST-HT 3.3 Acoustic penetration Sound beam plane Plane containing the sound paths of the measuring barriers. Fig. 3.4: 2 sound paths in 1 plane Acoustic penetration The pipe has to be acoustically penetrable at the measuring point. The acoustic penetration is given when pipe and fluid do not attenuate the sound signal so strongly that it is completely absorbed before reaching the second transducer.
  • Page 16 3 General principles 3.4 Undisturbed flow profile FLUXUS G831ST-HT Tab. 3.1: Recommended distance from disturbances D – nominal pipe diameter at the measuring point l – recommended distance between disturbance and transducer position disturbance: 90° elbow inlet: l ≥ 10 D outlet: l ≥...

  • Page 17: Product Description

    4 Product description FLUXUS G831ST-HT 4.1 Measuring system Product description Measuring system The measurement system consists of the transmitter, 2 pairs of ultrasonic transducers and the pipe on which the measurement is carried out. Fig. 4.1: Example of a measurement arrangement 1 –...
  • Page 18 4 Product description 4.2 Handling concept FLUXUS G831ST-HT Tab. 4.1: Description of the program branches Program branch Description Parameters Before starting a measurement, the transducer, pipe and fluid parameters have to be entered in the program branch Parameters. Having entered the parameters for the measuring point, the measurement can be started in the Measurement program branch Measurement.

  • Page 19: Display

    4 Product description FLUXUS G831ST-HT 4.3 Display Display Structure Fig. 4.3: Menu item of the program branch Parameters 1 – program branch 2 – currently edited menu item 3 – area for scroll lists, selection fields or input fields Tab. 4.2:...

  • Page 20: Keyboard

    4 Product description 4.4 Keyboard FLUXUS G831ST-HT Keyboard The keyboard consists of the following keys: ENTER, BRK, CLR, . The keys are operated using a magnetic pen with the housing being closed. Tab. 4.3: General functions ENTER confirmation of selection or input...

  • Page 21: Transport And Storage

    The measuring equipment must be packaged properly for transport. For weight indications, see technical specification. • Use, if possible, the original packaging by FLEXIM or an equivalent cardboard box. • Position the transmitter, transducers and accessories in the middle of the cardboard box.

  • Page 22: Mounting

    6 Mounting FLUXUS G831ST-HT Mounting Danger! Risk of explosion when using the measuring equipment in explosive atmospheres (ATEX, IECEx) This may result in personal or material damage or dangerous situations. → Observe the "Safety instructions for the use in explosive atmospheres" (see document SIFLUXUS).

  • Page 23: Transmitter

    6 Mounting FLUXUS G831ST-HT 6.1 Transmitter Transmitter 6.1.1 Opening and closing the housings Important! Do not open the housings using objects which may damage the thread or housing gasket. The transmitter has 3 set screws which have to be unscrewed before the housings can be opened. After the installation of the transmitter, make sure that the housings are closed correctly and that the set screws are tightened.
  • Page 24 6 Mounting 6.1 Transmitter FLUXUS G831ST-HT 6.1.2 Installation of the transmitter Caution! The transmitter can fall down during installation. There is a danger of crushing body parts or damaging the measuring equipment. → Secure the transmitter against falling. → Wear the required personal protective equipment.
  • Page 25 6 Mounting FLUXUS G831ST-HT 6.1 Transmitter 6.1.2.2 Pipe mounting Notice! The pipe has to be sufficiently stable to withstand the pressure exerted by the transmitter and the shackles. Mounting on a 2'' pipe The instrument mounting plate (2) is fixed to the pipe using the shackles (1).

  • Page 26: Transducers

    6 Mounting 6.2 Transducers FLUXUS G831ST-HT Transducers Mounting Caution! Warning of severe injuries from hot or cold components Touching hot or cold components can lead to severe injuries (e.g., thermal damage). → Any mounting, installation or connection work has to be concluded.
  • Page 27 6 Mounting FLUXUS G831ST-HT 6.2 Transducers 6.2.1.2 Pipe preparation Caution! Contact with grinding dust This may result in injuries (e.g., breathing difficulties, skin reactions, eye irritations). → Wear the required personal protective equipment. → Observe the applicable rules. Important! The pipe has to be sufficiently stable to withstand the pressure exerted by the transducers and the fasteners.
  • Page 28 6 Mounting 6.2 Transducers FLUXUS G831ST-HT 6.2.2 Installation of the transducers 6.2.2.1 Orientation of the transducers and determination of the distance between the transducers and measuring barriers Observe the orientation of the transducers. If the transducers of a transducer pair have been mounted properly, the engravings on them form an arrow pointing in the flow direction.
  • Page 29 6 Mounting FLUXUS G831ST-HT 6.2 Transducers 6.2.2.2 Transducer arrangement The transducers can be arranged in the mounting rails in different ways: Fig. 6.5: Transducer arrangement in mounting rails all transducers in one pair of rails a small, Δx small each transducer pair in its own pair of rails: a small, Δx large...
  • Page 30 6 Mounting 6.2 Transducers FLUXUS G831ST-HT 6.2.2.4 Mounting with Variofix L (PermaRail) Mounting For measurements in diagonal arrangement, the transducer mounting fixtures are mounted on opposite sides of the pipe. Mounting the transducer pairs in one pair of rails is not possible when using Variofix L. In the following, the installation of 2 pairs of rails in diagonal arrangement is described (each transducer pair in its own pair of rails).
  • Page 31 6 Mounting FLUXUS G831ST-HT 6.2 Transducers Step 2: Fixation of the clasps to the tension straps • Select the installation instruction of the supplied clasp: Band clamp clasp The clasp is fixed to the tension strap, see Fig. 6.8. Quick release clasp The clasp is fixed to the tension strap, see Fig.
  • Page 32 6 Mounting 6.2 Transducers FLUXUS G831ST-HT Step 3: Fixation of the tension strap to the pipe One tension strap is fixed to the pipe using 2 opposite tension strap clamps. The second tension strap is mounted later. Fig. 6.11: Tension strap with clamp and metal spring on the pipe 1 –...
  • Page 33 6 Mounting FLUXUS G831ST-HT 6.2 Transducers Fig. 6.14: Tension strap with band clamp clasp 1 – clasp screw • Place the tension strap around the pipe and insert it into the clasp, see Fig. 6.13. • Tighten the tension strap.
  • Page 34 6 Mounting 6.2 Transducers FLUXUS G831ST-HT Fig. 6.16: Ratchet clasp with tension strap 1 – sense of rotation 2 – edge 3 – lever 4 – clasp screw with slot Step 4: Fixation of the rail to the pipe • Place the tension strap clamp (2) in the rail, see Fig. 6.17. Observe the orientation of the tension strap clamp.
  • Page 35 6 Mounting FLUXUS G831ST-HT 6.2 Transducers Band clamp clasp • Insert the tension strap into the tension strap clamp (2). • Place the tension strap around the pipe and insert it into the tension strap clamp on the opposite side and the tension strap (see Fig.
  • Page 36 6 Mounting 6.2 Transducers FLUXUS G831ST-HT Ratchet clasp • Insert the tension strap into the tension strap clamp (2) and the metal spring, see Fig. 6.19 and Fig. 6.22. • Place the tension strap around the pipe and insert it into the tension strap clamp on the opposite side and the slot of the clasp screw (see Fig.
  • Page 37 6 Mounting FLUXUS G831ST-HT 6.2 Transducers Fig. 6.24: Pipe with 2 rails Step 5: Installation of the transducers in the mounting fixture Variofix L • Press the transducers firmly into their clamping fixtures in the covers until they are tightly fixed (see Fig. 6.25). Observe the correct orientation of the transducers.
  • Page 38 6 Mounting 6.2 Transducers FLUXUS G831ST-HT Fig. 6.26: Adjustment of the distance between the measuring barriers Δx 1 – cover 2 – strain relief clamp 3 – equipotential bonding terminal Δx – distance between measuring barriers Notice! Make sure that the coupling foil remains on the contact surface of the transducers. For information concerning the coupling foil, see the safety data sheet.
  • Page 39 6 Mounting FLUXUS G831ST-HT 6.2 Transducers 6.2.2.5 Mounting with Variofix C Mounting For measurements in diagonal arrangement, the transducer mounting fixtures are mounted on opposite sides of the pipe. Depending on the transducer distance a and the measuring barrier distance Δx, 1 or 2 pairs of rails have to be mounted.
  • Page 40 6 Mounting 6.2 Transducers FLUXUS G831ST-HT Step 1: Disassembly of the transducer mounting fixture Variofix C • Disassemble the transducer mounting fixture Variofix C. In order to remove the cover from the rail, bend the outer sides of the cover outwards.
  • Page 41 6 Mounting FLUXUS G831ST-HT 6.2 Transducers • Insert approx. 100 mm of the tension strap into one of the slots of the tension strap clamp and bend it, see Fig. 6.31. • Insert the long end of the tension strap into the 2 tension strap clamp and the metal spring, see Fig. 6.32). Place the tension strap around the pipe, see Fig.
  • Page 42 6 Mounting 6.2 Transducers FLUXUS G831ST-HT Mounting the rail with ratchet clasp • Cut the tension strap to length (pipe circumference + at least 120 mm). Caution! The edge of the tension strap is very sharp. Risk of injury! → Debur sharp edges.
  • Page 43 6 Mounting FLUXUS G831ST-HT 6.2 Transducers Fig. 6.37: Ratchet clasp with tension strap 1 – sense of rotation 2 – edge 3 – lever 4 – clasp screw with slot • Put the rails on the tension strap clamps (see Fig. 6.38).
  • Page 44 6 Mounting 6.2 Transducers FLUXUS G831ST-HT • Tighten the tensioning screws. • Fix the spacing elements on the rail to mark the transducer position. • Check whether the transducer distance of transducer pair B corresponds to the value displayed by the transmitter.
  • Page 45 6 Mounting FLUXUS G831ST-HT 6.2 Transducers Fig. 6.41: Removal of the cover 1 – lever tool 2 – fixture 6.2.2.6 Installation with WaveInjector The WaveInjector is a transducer mounting fixture for the ultrasonic flow measurement at extreme temperatures. Fig. 6.42: Transducer mounting fixture WaveInjector WI-400x-xx-C For the installation of the WaveInjector, see document SUFLUXUS_WI.

  • Page 46: Temperature Probe

    6 Mounting 6.3 Temperature probe FLUXUS G831ST-HT Temperature probe Mounting 6.3.1 Pipe preparation Caution! Contact with grinding dust This may result in injuries (e.g., breathing difficulties, skin reactions, eye irritations). → Wear the required personal protective equipment. → Observe the applicable rules.
  • Page 47 6.3 Temperature probe Fig. 6.43: Clasp Fig. 6.44: Temperature probe on the pipe 6.3.2.2 Installation with FLEXIM clasp Caution! The edge of the tension strap is very sharp. Risk of injury! → Debur sharp edges. → Wear the required personal protective equipment.
  • Page 48 6 Mounting 6.3 Temperature probe FLUXUS G831ST-HT 6.3.2.3 Installation with quick release clasp Caution! The edge of the tension strap is very sharp. Risk of injury! → Debur sharp edges. → Wear the required personal protective equipment. → Observe the applicable rules.

  • Page 49: Connection

    7 Connection FLUXUS G831ST-HT Connection Danger! Risk of explosion when using the measuring equipment in explosive atmospheres (ATEX, IECEx) This may result in personal or material damage or dangerous situations. → Observe the "Safety instructions for the use in explosive atmospheres" (see document SIFLUXUS).
  • Page 50 7 Connection FLUXUS G831ST-HT The transmitter has 2 housings. The terminals for the connection of the transducers are in the lower housing, the terminals for the connection of the outputs and of the power supply on the rear side of the upper housing.

  • Page 51: Transducers

    7 Connection FLUXUS G831ST-HT 7.1 Transducers Transducers The transmitter has 2 cable glands for the connection of the transducers. If the transmitter has only one measuring channel, one of the openings is closed with a blind plug. It is recommended to run the cables from the measuring point to the transmitter before connecting the transducers to avoid load on the connectors.
  • Page 52 7 Connection 7.1 Transducers FLUXUS G831ST-HT 7.1.1 Connection of the transducer cable to the transmitter Important! The degree of protection of the transmitter is only ensured if all cables are tightly fitted using cable glands and the housing is firmly screwed.
  • Page 53 7 Connection FLUXUS G831ST-HT 7.1 Transducers 7.1.2 Connection of the extension cable to the transmitter The extension cable is connected to the transmitter via the transducer connection. • Remove the blind plug for the connection of the transducer cable. • Open the cable gland of the extension cable. The compression part remains in the cap nut.
  • Page 54 7 Connection 7.1 Transducers FLUXUS G831ST-HT 7.1.3 Connection of the transducer cable to the junction box • Remove the blind plug for the connection of the transducer cable. • Insert the transducer cable into the junction box. • Fix the transducer cable by tightening the cable gland.
  • Page 55 7 Connection FLUXUS G831ST-HT 7.1 Transducers 7.1.4 Connection of the extension cable to the junction box 7.1.4.1 Connection without potential separation (standard) The connection of the extension cable to the junction box without potential separation ensures that the transducer, junction box and transmitter are on the same potential. The extension cable should always be connected in this manner, especially if power current cables are nearby.
  • Page 56 7 Connection 7.1 Transducers FLUXUS G831ST-HT Fig. 7.6: Connection of the extension and transducer cable to the junction box cable gland 1 – extension cable 2 – external shield, brushed back 3 – cap nut 4 – compression part 5 – basic part 6 –...
  • Page 57 7 Connection FLUXUS G831ST-HT 7.1 Transducers Important! The external shield of the extension cable must not have electrical contact to the junction box. Therefore, the extension cable has to remain completely insulated up to the shield terminal. • Fix the extension cable and the external shield to the shield terminal.
  • Page 58 7 Connection 7.1 Transducers FLUXUS G831ST-HT 7.1.5 Transducer module (SENSPROM) The transducer module contains important transducer data for the operation of the transmitter with transducers. If transducers are replaced or added, the transducer module has to be replaced or added as well.

  • Page 59: Power Supply

    7 Connection FLUXUS G831ST-HT 7.2 Power supply Power supply Connection The installation of the power supply is carried out by the operator. The operator has to provide an overcurrent protector (fuse or similar device) disconnecting all energizing wires in case of an inadmissible high current consumption. The impedance of the protective earth has to be low ohmic in order not to allow touch voltage pass the permissible limit.

  • Page 60: Outputs

    7 Connection 7.3 Outputs FLUXUS G831ST-HT 7.2.1 Cable connection • Remove the blind plug to connect the cable to the transmitter. • Prepare the cable with an M20 cable gland. The used cable has to have a wire cross-section of 0.25…2.5 mm².
  • Page 61 7 Connection FLUXUS G831ST-HT 7.3 Outputs Tab. 7.7: Output circuits output transmitter external circuit explanation internal circuit connection current output Ix, = 29 V intrinsically safe, passive = 100 mA = 0.725 W = 1 nF = 50 nH ≤ U >...

  • Page 62: Inputs

    7 Connection 7.4 Inputs FLUXUS G831ST-HT Inputs Fig. 7.12: Connection of the inputs to the transmitter upper housing, back view lower housing, ARS AVS BRSBVS front view 7.4.1 Current input Important! Observe the correct polarity in order to avoid damaging the current source. A permanent short circuit can lead to the destruction of the current input.

  • Page 63: Temperature Probe

    7 Connection FLUXUS G831ST-HT 7.5 Temperature probe Temperature probe Connection It is possible to connect the temperature probes Pt100/Pt1000 (4-wire) to the inputs of the transmitter (optional). Fig. 7.13: Connection of the inputs to the transmitter upper housing, back view...
  • Page 64 7 Connection 7.5 Temperature probe FLUXUS G831ST-HT Tab. 7.10: Connection systems direct connection connection with extension cable connection with junction box transmitter transmitter transmitter transmitter 7.5.1 Direct connection of the temperature probe • Remove the blind plug for the connection of the temperature probe.
  • Page 65 7 Connection FLUXUS G831ST-HT 7.5 Temperature probe Tab. 7.11: Terminal assignment (transmitter) terminal temperature probe red/blue white/blue white 7.5.2 Connection with extension cable • Remove the blind plug for the connection of the temperature probe. • Open the cable gland of the extension cable. The compression part remains in the cap nut.
  • Page 66 7 Connection 7.5 Temperature probe FLUXUS G831ST-HT Connection of the extension cable to the junction box • Remove the blind plug for the connection of the extension cable. • Open the cable gland of the extension cable. The compression part remains in the cap nut.
  • Page 67 7 Connection FLUXUS G831ST-HT 7.5 Temperature probe Connection of the temperature probe to the junction box • Remove the blind plug for the connection of the temperature probe. • Open the cable gland of the temperature probe. The compression part remains in the cap nut.

  • Page 68: Service Interface

    7 Connection 7.6 Service interface FLUXUS G831ST-HT Service interface Connection 7.6.1 USB interface The transmitter can be connected directly to the PC via the USB interface. The USB interface may only be connected outside the explosive atmosphere (housing cover open).

  • Page 69: Start-Up

    8 Start-up FLUXUS G831ST-HT Start-up Danger! Risk of explosion when using the measuring equipment in explosive atmospheres (ATEX, IECEx) This may result in personal or material damage or dangerous situations. → Observe the "Safety instructions for the use in explosive atmospheres" (see document SIFLUXUS).

  • Page 70: Start-Up Settings

    8 Start-up 8.1 Start-up settings FLUXUS G831ST-HT Start-up settings When starting up the transmitter for the first time, the following settings are required: • language • time/date • unit of measurement These displays will only be indicated when the transmitter is switched on for the first time or after an initialization.

  • Page 71: Switching On

    8 Start-up FLUXUS G831ST-HT 8.2 Switching on Switching on As soon as the transmitter is connected to the power supply, the menu is displayed in the adjusted language. The language can be changed. Notice! The parameters cannot be changed during the measurement. The measurement has to be stopped in order to change the parameters.

  • Page 72: Language

    8 Start-up 8.4 Language FLUXUS G831ST-HT Language Special functions\System settings\Language The language of the transmitter can be selected: • Select the menu item Language. • Press ENTER. • Select the desired language from the scroll list. • Press ENTER. Afterwards the menu will be displayed in the selected language. The selected language remains activated when the transmitter is switched off and on again.

  • Page 73: Information Regarding The Transmitter

    8 Start-up FLUXUS G831ST-HT 8.7 Information regarding the transmitter Information regarding the transmitter Special functions\System settings\Transmitter info • Select the menu item Transmitter info. • Press ENTER. • Press to scroll through the list. • Press BRK to return to the menu item System settings.

  • Page 74: Measurement

    9 Measurement FLUXUS G831ST-HT Measurement Danger! Risk of explosion when using the measuring equipment in explosive atmospheres (ATEX, IECEx) This may result in personal or material damage or dangerous situations. → Observe the "Safety instructions for the use in explosive atmospheres" (see document SIFLUXUS).

  • Page 75: Parameter Input

    9 Measurement FLUXUS G831ST-HT 9.1 Parameter input Parameter input Notice! All settings changed in this program branch will be stored at the beginning of the measurement. Notice! Avoid a simultaneous parameter entry via the keyboard and the USB or process interface. The parameter records received via these interfaces will overwrite the current transmitter parameterization.
  • Page 76 9 Measurement 9.1 Parameter input FLUXUS G831ST-HT Parameters\Connected transd. The parameters can also be entered without connected transducers or transducer module. • Select the list item Connected transd. • Press ENTER. The display Transducer not found will be indicated if neither transducers nor transducer module are connected.
  • Page 77 9 Measurement FLUXUS G831ST-HT 9.1 Parameter input Sound speed of the pipe material Parameters\Pipe material\Other material\c material • Enter the sound speed of the pipe material. Notice! There are 2 sound speeds for pipe materials: the longitudinal and the transversal one. Enter the sound speed which is nearer to 2500 m/s.
  • Page 78 9 Measurement 9.1 Parameter input FLUXUS G831ST-HT Sound speed of the lining material Parameters\Lining material\Other material\c material • Enter the sound speed of the lining material. Notice! For pipe materials there are 2 sound speeds, the longitudinal and the transversal one. Enter the sound speed which is nearer to 2500 m/s.
  • Page 79 9 Measurement FLUXUS G831ST-HT 9.1 Parameter input 9.1.3 Input of fluid parameters Fluid temperature Parameters\Fluid temp. The fluid temperature is used: – at the beginning of the measurement for the interpolation of the sound speed and therefore for the calculation of the recommended transducer distance –...

  • Page 80: Measurement Settings

    9 Measurement 9.2 Measurement settings FLUXUS G831ST-HT Measurement settings • Select the program branch Options. • Press ENTER. Options Measurement\Measurement Measurement Units of measurement • Select the menu item Measurement. Physical quantity Flow velocity • Press ENTER. Unit of measurement...
  • Page 81 9 Measurement FLUXUS G831ST-HT 9.2 Measurement settings 9.2.4 Input of the error delay Options\Measurement\Error value delay The error delay is the time interval after which the error value is transmitted to the output. This display will only be indicated if the list item Edit is selected in the menu item Special functions\Dialogs/ Menus\Error value delay.
  • Page 82 9 Measurement 9.2 Measurement settings FLUXUS G831ST-HT Assignment of a source item A source item has to be assigned to each selected output. Options\Outputs\...\Source item • Select a source item whose measured value, status value or event value is to be transmitted to the output.
  • Page 83 9 Measurement FLUXUS G831ST-HT 9.2 Measurement settings Depending on the selected source item, it is possible to output measured values, status values or event values. Tab. 9.2: Output of measured values, status values or event values source item measured value...
  • Page 84 9 Measurement 9.2 Measurement settings FLUXUS G831ST-HT Example v [m³/h] source item: volumetric flow rate output: current output output range: 4…20 mA error delay: t > 0 The volumetric flow rate cannot be measured during the time interval t ...t .
  • Page 85 9 Measurement FLUXUS G831ST-HT 9.2 Measurement settings Measuring range The sign of the measured value and the measuring range are determined. Options\Outputs\...\Measured values\Absolute value • Select Sign if the sign of the measured values is to be considered for the output.
  • Page 86 9 Measurement 9.2 Measurement settings FLUXUS G831ST-HT Options\Outputs\...\Enter test value • Enter a test value for the selected physical quantity. It has to be within the measuring range. • Press ENTER. If the external measuring instrument displays the entered value, the output functions correctly.
  • Page 87 9 Measurement FLUXUS G831ST-HT 9.2 Measurement settings Options\Outputs\...\Enter test value • Enter a test value. It has to be within the output range. • Press ENTER. If the external measuring instrument displays the entered value, the output functions correctly. • Select Repeat to repeat the test or Finish to display the next menu item.
  • Page 88 9 Measurement 9.2 Measurement settings FLUXUS G831ST-HT Output function test The function of the output can now be tested. • Connect an external measuring instrument to the terminals of the installed output. Options\Outputs\...\Test signal • Select Yes to test the output. Select No to display the next menu item.

  • Page 89: Start Of The Measurement

    9 Measurement FLUXUS G831ST-HT 9.3 Start of the measurement Start of the measurement • Select the program branch Measurement. Measurement • Press ENTER. If the parameters in the program branch Parameters are Installation Start measurement not valid or incomplete, the error message Invalid parameters will be displayed.
  • Page 90 9 Measurement 9.3 Start of the measurement FLUXUS G831ST-HT Adjustment of the distance between the measuring barriers Measurement\...\Barrier distance The recommended distance between measuring barriers will be displayed. The measuring barrier distance is the distance between the transducers of the transducer pairs A and B.

  • Page 91: Display Of Measured Values

    9 Measurement FLUXUS G831ST-HT 9.4 Display of measured values Display of measured values The measured values are displayed during the measurement as follows: Fig. 9.2: Display of measured values 1 – program branch, status indicators 2 – display toggling between physical quantity and fluid 3 –...

  • Page 92: Display Of Parameters

    9 Measurement 9.5 Display of parameters FLUXUS G831ST-HT Display of parameters The parameters can be displayed during the measurement. • Press BRK during the measurement. The following display appears: Fig. 9.4: Scroll list in the program branch Measurement 1 – status indication The measurement is running in the background.

  • Page 93: Repeated Display Of Measured Values

    9 Measurement FLUXUS G831ST-HT 9.6 Repeated display of measured values Repeated display of measured values • Select the program branch Measurement to return to the measured value display. • Press ENTER. The following display appears: Fig. 9.6: Scroll list in the program branch Measurement Measurement\Show measurement •...

  • Page 94: Stop Of The Measurement

    9 Measurement 9.8 Stop of the measurement FLUXUS G831ST-HT Taking a snap Measurement\Execute command\Take a snap • Select the list item Take a snap. • Press ENTER. A snap will be taken. This display will only be indicated if snap function is enabled in the menu item Special functions\Snap\ Configuration\Snap.

  • Page 95: Troubleshooting

    10 Troubleshooting FLUXUS G831ST-HT Troubleshooting Danger! Risk of explosion when using the measuring equipment in explosive atmospheres (ATEX, IECEx) This may result in personal or material damage or dangerous situations. → Observe the "Safety instructions for the use in explosive atmospheres" (see document SIFLUXUS).

  • Page 96: Problems With The Measurement

    The signal is lost during the measurement. • If the pipe was without any pressure and afterwards no measuring signal has been received, contact FLEXIM. • Wait a moment until the acoustic contact is reestablished. The measurement can be interrupted by a temporarily high portion of liquid and solids in the fluid.

  • Page 97: Measuring Point Selection

    10 Troubleshooting FLUXUS G831ST-HT 10.2 Measuring point selection 10.2 Measuring point selection • Make sure that the recommended min. distance to any disturbance is observed. • Avoid measuring points with deposit formation in the pipe. • Avoid measuring points in the vicinity of deformations and defects on the pipe as well as welds.

  • Page 98: Maintenance And Cleaning

    11 Maintenance and cleaning FLUXUS G831ST-HT Maintenance and cleaning Danger! Risk of explosion when using the measuring equipment in explosive atmospheres (ATEX, IECEx) This may result in personal or material damage or dangerous situations. → Observe the "Safety instructions for the use in explosive atmospheres" (see document SIFLUXUS).

  • Page 99: Maintenance

    11 Maintenance and cleaning FLUXUS G831ST-HT 11.1 Maintenance 11.1 Maintenance The transmitter and the transducers are practically maintenance-free. In order to ensure security, the following maintenance intervals are recommended: item maintenance step interval measure stainless steel housing visual inspection for corrosion...

  • Page 100: Examination Of The O-Ring

    Use original spare parts only. Store the O-ring replacement in a hermetically sealed and dark place. Housing with increased safety Defective O-rings have to be replaced. Important! O-rings of increased safety housings may only be replaced by qualified FLEXIM personnel. Fig. 11.1: Transmitter 1 – housing with increased safety (Ex e) 2 –...

  • Page 101: Examination Of Housing And Sight Glass

    → In order to ensure ignition protection, the housing and the sight glass have always to comply with the regulations. Modifications on the housing must only be realized by FLEXIM. The housing and the sight glass must be regularly checked for damages. Cracked or scratched sight glasses or damaged housings have to be replaced by FLEXIM personnel immediately.

  • Page 102: Dismounting And Disposal

    Avoiding environmental damage by correct disposal of components Depending on the material, the corresponding parts have to be disposed of in residual or special waste or recycled. FLEXIM accepts the return of the components. For further information, contact FLEXIM. 2021-06-01, UMFLUXUS_G831ST-HTV1-0EN...

  • Page 103: User Modes

    13 User modes FLUXUS G831ST-HT User modes The user modes allow an advanced diagnostic of signals and measured values as well as the definition of additional Special functions parameters adapted to the application. The following user modes can be selected: System settings •StandardUser...

  • Page 104: Standarduser Mode

    13 User modes 13.1 StandardUser mode FLUXUS G831ST-HT 13.1 StandardUser mode In the StandardUser mode, all measurements can be carried out for the corresponding application. At the first start-up the transmitter operates in the StandardUser mode. 13.1.1 Cut-off flow The cut-off flow is a lower limit for the flow velocity. All measured flow velocities that are below the limit are set to zero.
  • Page 105 13 User modes FLUXUS G831ST-HT 13.1 StandardUser mode Options\Special settings\Multi-point calibration\Point x=act. value • Enter the measured value of the transmitter. • Press ENTER. Options\Special settings\Multi-point calibration\Point x=set value • Enter the measured value of the reference flowmeter. • Press ENTER.
  • Page 106 13 User modes 13.1 StandardUser mode FLUXUS G831ST-HT 13.1.5 High voltage High voltage increases the excitation voltage of the transducers. When measuring using the correlation principle, high voltage is activated by default. Options\Special settings\High voltage • Select the menu item Special settings in the program branch Options.

  • Page 107: Expertuser Mode

    13 User modes FLUXUS G831ST-HT 13.2 ExpertUser mode 13.2 ExpertUser mode Some menu items that are not visible in the StandardUser mode are displayed. Notice! The ExpertUser mode is intended for experienced users with advanced application knowledge. Changed parameters can affect the StandardUser mode and lead to wrong measured values or to a measurement failure when setting up a new measuring point.
  • Page 108 13 User modes 13.2 ExpertUser mode FLUXUS G831ST-HT Notice! If the limit of the flow velocity +Flow velocity limit is too low or -Flow velocity limit is too high, a measurement might be impossible because most of the measured values will be marked as invalid.

  • Page 109: Superuser Mode And Superuser Ext. Mode

    13 User modes FLUXUS G831ST-HT 13.3 SuperUser mode and SuperUser ext. mode 13.3 SuperUser mode and SuperUser ext. mode Some menu items that are not visible in the StandardUser or ExpertUser mode are now displayed. In the SuperUser ext. mode it is not possible to carry out any plausibility test of the entered parameters.
  • Page 110 13 User modes 13.3 SuperUser mode and SuperUser ext. mode FLUXUS G831ST-HT Example factor: 1.1 offset: -10 cm/s = -0.1 m/s If a flow velocity v = 5 m/s is measured, before the calculation of the derived quantities it will be corrected as follows: = 1.1 ·...

  • Page 111: Inputs

    14 Inputs FLUXUS G831ST-HT 14.1 Configuration of an input Inputs The inputs are configured in the program branch Special functions and assigned to the individual measuring channels in the program branch Options. 14.1 Configuration of an input If the transmitter is equipped with inputs, they have to be configured.
  • Page 112 14 Inputs 14.1 Configuration of an input FLUXUS G831ST-HT The correction value is automatically added to the measured temperature. The temperature correction is used e.g., if the characteristic curves of the two temperature probes differ considerably from each other or a known and constant temperature gradient exists between the measured temperature and the actual temperature.
  • Page 113 14 Inputs FLUXUS G831ST-HT 14.1 Configuration of an input 14.1.3 Definition of a switching condition A switching condition can be defined. Special functions\Inputs\...\Trigger value • Select Yes if a switching condition is to be defined. Select No to display the next menu item.

  • Page 114: Assignment Of An Input

    14 Inputs 14.2 Assignment of an input FLUXUS G831ST-HT 14.1.4 Terminal assignment Inputs\...\Input info The terminals for the connection of the input are displayed. By pressing further information is displayed. • Press ENTER. 14.1.5 Function test of the input The function of the installed input can now be tested.

  • Page 115: Data Logger

    15 Data logger FLUXUS G831ST-HT 15.1 Configuration of the data logger Data logger The transmitter has a data logger which stores the measured values during the measurement. Special functions Data logger Notice! In order to store measured data, the data logger has Configuration to be configured.
  • Page 116 15 Data logger 15.1 Configuration of the data logger FLUXUS G831ST-HT Example actual time: 09:06 am setting: Full 10 minutes The storing starts at 09:10 am. Notice! Make sure that the time of all transmitters is synchronized. Event-based starting time...
  • Page 117 15 Data logger FLUXUS G831ST-HT 15.1 Configuration of the data logger Special functions\Data logger\Configuration\Start storing\Event-based\Buffer time ->П • Enter the time interval for the measured values to be stored before the event occurs. • Press ENTER. Special functions\Data logger\Configuration\Start storing\Event-based\Buffer time П->...
  • Page 118 15 Data logger 15.1 Configuration of the data logger FLUXUS G831ST-HT Storage mode Special functions\Data logger\Configuration\Storage mode • Select the menu item Configuration. • Press ENTER until the menu item Storage mode is displayed. • Press ENTER. • Select Sample to store the current measured value.

  • Page 119: Deletion Of The Data Logger

    15 Data logger FLUXUS G831ST-HT 15.2 Deletion of the data logger 15.2 Deletion of the data logger Special functions\Data logger\Delete meas. values • Select the menu item Delete meas. values. • Press ENTER. • Select Yes or No. • Press ENTER.

  • Page 120: Data Transmission

    It allows to: • read measured values, setup settings and snaps from the transmitter and store them to files on the PC • send files to FLEXIM to support the service • monitor the measurement For the operation of FluxDiagReader see the help function of this program.

  • Page 121: Advanced Functions

    17 Advanced functions FLUXUS G831ST-HT 17.1 Totalizers Advanced functions 17.1 Totalizers The total volume or total mass of the fluid at the measuring point can be determined. There are 2 totalizers, one for the positive and the other for the negative flow direction. The unit of measurement used for totalizing corresponds to the volume or mass unit selected for the physical quantity.
  • Page 122 17 Advanced functions 17.1 Totalizers FLUXUS G831ST-HT The number of decimal places is constant. The max. value of the totalizers decreases with an increasing number of decimal places. decimal places max. value max. display < 10 ±9999999999 < 10 ±99999999.9 <...
  • Page 123 17 Advanced functions FLUXUS G831ST-HT 17.1 Totalizers Notice! The overflow of a totalizer influences all output channels, e.g., the data logger and the online transmission of data. The sum of both totalizers (throughput Q) transmitted via an output is no longer valid after one of the totalizers has overflowed for the first time.

  • Page 124: Diagnosis With The Help Of The Snap Function

    17 Advanced functions 17.2 Diagnosis with the help of the snap function FLUXUS G831ST-HT 17.2 Diagnosis with the help of the snap function 17.2.1 Configuration By means of the snap function it is possible to store measuring parameters which are useful for the evaluation of measuring results or diagnostic purposes.

  • Page 125: Modification Of The Limit For The Inner Pipe Diameter

    17 Advanced functions FLUXUS G831ST-HT 17.3 Modification of the limit for the inner pipe diameter 17.2.3 Deletion of snaps Special functions\Snap\Delete snaps • Select the menu item Delete snaps. • Press ENTER. • Select Yes or No. • Press ENTER.

  • Page 126: Remote Functions

    17 Advanced functions 17.4 Remote functions FLUXUS G831ST-HT 17.4 Remote functions Remote functions can be triggered by event triggers, triggerable analog inputs or binary inputs. Options In order to define an input for a remote function, it has to be enabled in the menu item Special functions\Inputs.

  • Page 127: Event Triggers

    17 Advanced functions FLUXUS G831ST-HT 17.5 Event triggers Reset of the totalizers • Select the list item Reset totalizers. • Press ENTER. The totalizers are set to zero. Totalizing starts at zero again, as soon as the condition for the remote function is no longer met.
  • Page 128 17 Advanced functions 17.5 Event triggers FLUXUS G831ST-HT Tab. 17.1: Source items source item list item output Flow quantities Flow velocity flow velocity Operation vol. flow operating volumetric flow rate Mass flow rate mass flow rate totalizer for the volumetric flow rate in positive flow direction...
  • Page 129 17 Advanced functions FLUXUS G831ST-HT 17.5 Event triggers Definition of the switching condition Options\Event trigger\Rx Enable\Source item\...\Function • Select the switching condition. • Press ENTER. Definition of the holding behavior Options\Event trigger\Rx Enable\Source item\...\Type • Select the type of the holding behavior.
  • Page 130 17 Advanced functions 17.5 Event triggers FLUXUS G831ST-HT Definition of the switching delay Options\Event trigger\Rx Enable\Source item\...\Glitch interval • Enter a time interval after which the event trigger has to switch in case the event occurred. • Press ENTER. Options\Event trigger\Rx Enable\Source item\...\Failure delay •...

  • Page 131: Event Protocol

    17 Advanced functions FLUXUS G831ST-HT 17.6 Event protocol 17.5.4 Status display of the event triggers Notice! There is no visual or acoustic indication of event trigger switching. The state of the event triggers is displayed during the measurement. • Press to scroll through the second line from below until the event trigger status is displayed.

  • Page 132: Settings

    18 Settings 18.1 Dialogs and menus FLUXUS G831ST-HT Settings 18.1 Dialogs and menus Special functions\Dialogs/Menus • Select the menu item Dialogs/Menus in the program branch Special functions. • Press ENTER. Pipe circumference Special functions\Dialogs/Menus\Pipe circumference • Select the menu item Pipe circumference.
  • Page 133 18 Settings FLUXUS G831ST-HT 18.1 Dialogs and menus Measuring point number Special functions\Dialogs/Menus\Measuring point no. • Select the menu item Measuring point no.. • Select Number if the measuring point number should only consist of numeric characters. Select Text if the measuring point number should only consist of alphabetic characters.

  • Page 134: Measurement Settings

    18 Settings 18.2 Measurement settings FLUXUS G831ST-HT 18.2 Measurement settings Special functions\Measurement\Measurement settings • Select the menu item Measurement in the program branch Special functions. • Press ENTER. • Select the menu item Measurement settings. • Press ENTER. Multi-point calibration A multi-point calibration allows a very precise output of measuring results.

  • Page 135: Units Of Measurement

    18 Settings FLUXUS G831ST-HT 18.3 Units of measurement 18.3 Units of measurement It is possible to set the global units of measurement for length, temperature, pressure, sound speed, density and kinematic viscosity. Special functions\Units of measurement • Select the menu item Units of measurement.

  • Page 136: Working With Parameter Records

    18 Settings 18.5 Working with parameter records FLUXUS G831ST-HT 18.5 Working with parameter records 18.5.1 Introduction Parameter records are data sets that contain all information necessary to perform a certain measurement task: • pipe parameters • transducer parameters • fluid parameters •...

  • Page 137: Contrast Settings

    18 Settings FLUXUS G831ST-HT 18.6 Contrast settings 18.6 Contrast settings Special functions\System settings\Display contrast • Select the menu item System settings in the program branch Special functions. • Press ENTER. • Select the menu item Display contrast. • Press ENTER.

  • Page 138: Key Lock

    18 Settings 18.8 Key lock FLUXUS G831ST-HT Language The language selection can either be carried out in the program branch Special functions or by entering a HotCode: language HotCode English 909044 German 909049 French 909033 Spanish 909034 Dutch 909031 Russian...
  • Page 139 18 Settings FLUXUS G831ST-HT 18.8 Key lock Deactivation of the key lock • Select the menu item System settings in the program branch Special functions. • Press ENTER. Special functions\System settings\Key lock • Select Key lock. • Press ENTER. • Enter a 6-digit key lock code. For the input of numbers see section 4.4.
  • Page 140 18 Settings 18.8 Key lock FLUXUS G831ST-HT 2021-06-01, UMFLUXUS_G831ST-HTV1-0EN...

  • Page 141: Annex

    Annex FLUXUS G831ST-HT A Menu structure Annex Menu structure Program branches Parameters Measurement Options Special functions Transducer Measuring point no. Measurement System settings Outer diameter Expected max. flow Units of measurement Inputs Pipe material Transducer distance A Outputs Outputs Pipe wall thickness...
  • Page 142 Annex A Menu structure FLUXUS G831ST-HT Parameter input Parameters Transducer Connected transd. Select transducer Outer diameter Pipe material Pipe wall thickness Lining Lining 2 Coating Roughness Automatic Customized Fluid Fluid temp. Fluid pressure Extension cable Legend only if enabled in Special functions > Dialogs/Menus...
  • Page 143 Annex FLUXUS G831ST-HT A Menu structure Measurement settings Options Measurement Units of measurement Physical quantity Flow velocity Volumetric flow rate → Operation vol. flow → Mass flow rate → Flow velocity Volume total Unit of measurement Mass flow rate Damping...
  • Page 144 Annex A Menu structure FLUXUS G831ST-HT Data logger Special functions Data logger Configuration Delete meas. values Print meas. values Transmission settings Data logger info Start storing Delete spaces → Activated → Logger full → Meas. val. Series → Occup. Logger Event-based →...
  • Page 145 Annex FLUXUS G831ST-HT A Menu structure Measurement start Parameters Measurement Installation Start measurement Measuring point no. Expected max. flow Transducer distance A Barrier distance Transducer distance B Parameter search Measurement Stop measurement Show measurement Show parameters Read-only mode UMFLUXUS_G831ST-HTV1-0EN, 2021-06-01...
  • Page 146 Annex A Menu structure FLUXUS G831ST-HT Configuration of outputs Options Special functions Outputs Current output → Current Active Passive … Enable NAMUR NE43 Source item Flow quantities Totalizers Fluid properties Diagnostic values Miscellaneous Event trigger Status Values → R1 → R2 →...
  • Page 147 Annex FLUXUS G831ST-HT A Menu structure Configuration of the inputs Special functions Inputs → Temperature → Current Temperature Tx Enable Pt100/Pt1000 Temperature offset → Temperature Trigger value Function → Within range → MAX (x>limit) → Out of range → MIN (x<limit) →...
  • Page 148 Annex A Menu structure FLUXUS G831ST-HT Configuration of the inputs Special functions Current Inputs Ix Enable → Temperature → Current Source item Customized Current → Temperature → Pressure → Density Input name → Kin. viscosity → Dyn. viscosity Unit of measurement...
  • Page 149 Annex FLUXUS G831ST-HT A Menu structure Special settings Options Linear calibration Special settings Cut-off flow Default Default Customized Profile correction Flow velocity limit Default Default Customized Multi-point calibration Signal search range High voltage Averaging factor Crest factor threshold Legend only in SuperUser mode only in ExpertUser, SuperUser and SuperUser ext.
  • Page 150 Annex A Menu structure FLUXUS G831ST-HT Results – overview Trigger Input quantities Physical quantities Special functions Options → Temperature → Flow quantities → Current → Sound speed → Totalizers → Fluid properties → Diagnostic values Condition Event trigger → Switching condition →...
  • Page 151 Annex FLUXUS G831ST-HT A Menu structure Definition of event triggers Options Event trigger Select Rx Enable Rx Source item Flow quantities Totalizers Fluid properties Diagnostic values Miscellaneous Function → MAX (x>limit) → MIN (x<limit) → Within range → Out of range →...
  • Page 152 Annex A Menu structure FLUXUS G831ST-HT Remote functions Trigger Special functions Options Condition Inputs Event trigger Temperature Current Select Rx Enable Enable Enable Rx Pt100/Pt1000 Source item Source item Function Condition Trigger value → MAX (x>limit) → MIN (x<limit) → Within range →...
  • Page 153 Annex FLUXUS G831ST-HT A Menu structure Event-based storing of measured values Trigger Special functions Options Condition Inputs Event trigger Temperature Current Select Rx Enable Enable Enable Rx Pt100/Pt1000 Source item Source item Function Condition Trigger value → MAX (x>limit) → MIN (x<limit) →...

  • Page 154: B Units Of Measurement

    Annex B Units of measurement FLUXUS G831ST-HT Units of measurement Length/roughness unit of measurement description millimeter inch Temperature unit of measurement description °C degree Celsius °F degree Fahrenheit Pressure unit of measurement description bar(a) bar (absolute) bar(g) bar (relative) psi(a)
  • Page 155 Annex FLUXUS G831ST-HT B Units of measurement Operating volumetric flow rate unit of measurement description operating volume (totalized) m3/d cubic meter per day m3/h cubic meter per hour m3/min cubic meter per minute m3/s cubic meter per second km3/h cubic kilometer per hour...
  • Page 156 Annex B Units of measurement FLUXUS G831ST-HT unit of measurement description operating volume (totalized) MMCFH million cubic feet per hour MMCF Igpd (Imp-gal/d) gallon per day Igal Igph (Imp-gal/h) gallon per hour Igal Igpm (Imp-gal/m) gallon per minute Igal Igps (Imp-gal/s)

  • Page 157: C Reference

    The following tables provide assistance for the user. The accuracy of the data depends on the composition, temperature and processing of the material. FLEXIM does not assume liability for any inaccuracies. Sound speed of selected pipe and lining materials at 20 °C The values of some of these materials are stored in the internal database of the transmitter.

  • Page 158: D Terminal Assignment

    Annex D Terminal assignment FLUXUS G831ST-HT Terminal assignment outputs, inputs variant connection terminal G831ST-HT-AA1 HART, intrinsically safe 11 (+), 12 (-) current output I1, intrinsically safe 11 (+), 12 (-) G831ST-HT-AA2 HART, intrinsically safe 11 (+), 12 (-) current output I1, intrinsically safe...

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