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Ultraflux Uf 821 User Manual
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Ultraflux Uf 821 User Manual

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2014 ULTRAFLUX S.A.
All rights reserved. No part of this document may be reproduced without prior written authorisation from
ULTRAFLUX S.A. ULTRAFLUX, Uf 821 are registered trademarks of ULTRAFLUX S.A.
NT UF 821 CP GB (a) / April 2014
Uf 821
(full pipe)
User manual
9, Allée Rosa Luxemburg
95610 ÉRAGNY, FRANCE
Tél : 33 (0)1 30 27 27 30
Fax : 33 (0)1 30 39 84 34

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  • Page 1 Fax : 33 (0)1 30 39 84 34 2014 ULTRAFLUX S.A. All rights reserved. No part of this document may be reproduced without prior written authorisation from ULTRAFLUX S.A. ULTRAFLUX, Uf 821 are registered trademarks of ULTRAFLUX S.A. NT UF 821 CP GB (a) / April 2014...

  • Page 2: Table Of Contents

    3.5 Tool-free removal of the lid ______________________________________________________ 21 3.6 Wiring instructions _____________________________________________________________ 22 3.7 Connection to the protective ground (to be carried out first) ____________________________ 22 3.8 Wiring the Terminals ___________________________________________________________ 22 3.9 USB Connection _______________________________________________________________ 27 NT UF 821 CP GB (a) / April 2014...
  • Page 3 4.2 Choosing the measurement location _______________________________________________ 29 4.3 Choosing the probe location _____________________________________________________ 33 4.4 Installing probes and connectors __________________________________________________ 35 CHAPTER 5: USING AND CONFIGURING THE Uf 821 ____________________ 38 5.1 Using the Uf 821 ______________________________________________________________ 39 5.2 Main configuration elements _____________________________________________________ 42 5.3 Configuring the Uf 821 __________________________________________________________ 42...

  • Page 4: Chapter 1: Overview

    CHAPTER 1: OVERVIEW NT UF 821 CP GB (a) / April 2014...

  • Page 5: General View Of The Converter

    Two cable glands for Eight cable glands for Cable gland the inputs/outputs and the four chords for the power the serial link supply Seal Protective earth Wall Retaining connection mounting screw plate NT UF 821 CP GB (a) / April 2014...

  • Page 6: Unit Open

    110-240V ac Serial link power supply connection connection RS232/485 Cable hooks Metalwork set back to allow for bending the cables 10-32V dc Protective earth power supply connection connection NT UF 821 CP GB (a) / April 2014...

  • Page 7: Nature Of The Equipment

    1.2 Nature of the equipment The Uf 821 is an ultrasonic flow meter used to measure flows using the transit time difference method. The measurement can be taken using an installation with up to 4 ultrasonic measurement chords. (One chord designates the acoustic path between two probes, each alternating between emitting and receiving.

  • Page 8: Power Supply

    1.7 Communication The Uf 821 has a serial link which can be wired using RS232 or RS485 mode, as well as a USB port. For this communication interface, the standard protocol chosen is the Slave JBUS (MODBUS). This enables the unit to be connected to an instrumentation and control system or to a computer.

  • Page 9: Inputs/Outputs

    The probes (inputs) on the 4-20 mA loop must be powered from an external power supply. 1.9 Ultrasound chords The Uf 821 enables the control of a maximum of 4 ultrasonic chords, or 8 probes. 8 cable glands are provided to pass the probe cables through.

  • Page 10: Operating Lights

    To change a row, select it using  or  and change the value using  or .  If no key is pressed for approximately one minute, the Uf 821 automatically returns to "measurement" mode and to the display chosen as priority using "B".

  • Page 11: Functions

    1.15 Cleaning the flow meter The box may be cleaned with water, diluted alcohol or detergent using a sponge or a soft cloth. Do not use abrasive materials or solvents. NT UF 821 CP GB (a) / April 2014...

  • Page 12: Recycling The Flow Meter

    2009 relating to the collection, treatment and disposal of electrical and electronic equipment, batteries and accumulators in France, Ultraflux delegates the responsibility for financial and also logistical recovery to the user, who will manage their own waste. The separate collection and recycling of your waste at the time of its disposal will help to preserve natural resources and guarantee recycling that is least harmful to the environment and human health.

  • Page 13: Chapter 2: Safety Instructions

    CHAPTER 2: SAFETY INSTRUCTIONS NT UF 821 CP GB (a) / April 2014...

  • Page 14: Using The Flow Meter

    Should the temperature of the unit rise abnormally, it is recommended to power off the flow meter and call Ultraflux for expert advice. In the event of a fire inside the flow meter, power it off without opening or touching it, then call the competent services in order to secure the premises.

  • Page 15: Equipment Connected To The Flow Meter

    Hazard risk; please refer to the precautions in these user instructions. The unit's protective ground must be connected. Do not throw in the bin. Follow the recycling procedure indicated in these instructions. NT UF 821 CP GB (a) / April 2014...

  • Page 16: Maintenance Work On The Flow Meter

    See paragraphs 3.6 & 3.8 on wiring of the above terminal boards. 2.4 Maintenance work on the flow meter Work relating to maintenance on the flow meter must only be carried out by Ultraflux staff (SAV) and using only parts supplied by Ultraflux (*).

  • Page 17: Contact Address

    For any requests for information, please contact us at: ULTRAFLUX 9, Allée Rosa Luxemburg 95610 ERAGNY FRANCE http://www.ultraflux.net E-mail : ultraflux@ultraflux.fr Tel.: 33 (0)1 30 27 27 30 Fax: 33 (0)1 30 39 84 34 2014 ULTRAFLUX S.A. NT UF 821 CP GB (a) / April 2014...

  • Page 18: Chapter 3: Installation And Wiring

    CHAPTER 3: INSTALLATION AND WIRING NT UF 821 CP GB (a) / April 2014...

  • Page 19: General

    Make fixing holes in the wall which should be of sufficiently solid construction. First, attach the wall plate supplied with the unit. The Uf 821 is then mounted on this plate, using the notches provided. Finally, lock the unit vertically against the lower return on the wall plate, using the M4 screw supplied.

  • Page 20: Using The Cabinet

    120 mm of clear space must be left below the glands to allow for connecting the cables. 3.3 Using the cabinet The Uf 821 enclosure was designed for installation on a wall only, where wiring operations are simpler, and following the order of work given below: Start by fixing the wall mounting plate.

  • Page 21: Using The Lid Stay

    Before removing the lid, it is essential that the Uf 821 is disconnected from the power and that the ribbon cable is also disconnected (ref (A) in the left hand illustration). The ribbon cable must also be re- connected with the power off.

  • Page 22: Wiring Instructions

    For the ground connection, it is recommended to use a copper braid. When choosing the braid, it is important to adhere to the following rule: Length / Width < 3. At the end of the Uf 821 ground connection contact there should be an M6 stud bolt fitted with appropriate washers and nuts. In all cases, the section of the conductor used must be greater or equal to that of the device's power supply cable conductors (see §3.8.1).

  • Page 23: Ultrasonic Chords

    Connect the terminals to suitable positions, then place the shield connection jumper. NT UF 821 CP GB (a) / April 2014...

  • Page 24: Input/Output Terminals

    4/20 mA outputs and the ones next to this, to double relay modules. Please refer to the following tables for the wiring to be carried out according to each type of module. NT UF 821 CP GB (a) / April 2014...

  • Page 25: Wiring Of The Current Output Modules

    Function Voltage A (+) Voltage A (-) Voltage B (+) Voltage B (-) 4) Wiring of the relay modules Terminal pin configuration: Function relay A relay A relay B relay B NT UF 821 CP GB (a) / April 2014...

  • Page 26: Wiring Of The Temperature Modules

    To connect the shielding, it is recommended that the same precautions are followed as for the inputs/outputs and the ultrasonic chords (copper tape). Use shield connection jumpers designed for this purpose. NT UF 821 CP GB (a) / April 2014...

  • Page 27: Usb Connection

    3.9 USB Connection Use of the USB port requires the Uf 821's lid to be open beforehand. The lid will be held at the required angle by the stay. NT UF 821 CP GB (a) / April 2014...

  • Page 28: Chapter 4: Installing A Measuring Point

    CHAPTER 4: INSTALLING A MEASURING POINT NT UF 821 CP GB (a) / April 2014...

  • Page 29: Composition Of A Measuring Point

    Apart from the electronic converter (the unit), a measuring point includes the following components:  1 to 4 pairs of probes  1 to 8 special cables for the probes (provided by Ultraflux) 4.2 Choosing the measurement location It is essential to follow the instructions given in our document “Ultrasonic ".
  • Page 30 NT UF 821 CP GB (a) / April 2014...

  • Page 31: Multichord Measurement

    10 %. Recommended locations Vertical pipes with rising flow Low points of horizontal pipes Siphon mounting for pipes with a slight slope NT UF 821 CP GB (a) / April 2014...
  • Page 32 Locations not recommended Vertical pipe with downflow, particularly in the case of free flow. High points NT UF 821 CP GB (a) / April 2014...

  • Page 33: Choosing The Probe Location

    For each chord, enter the length (in meters) between the faces of the two probes. To help you, read our document “Ultrasonic transit time flowmeter”. Also enter the projected length (Daxe) of this measurement relative to the axis of the pipe. NT UF 821 CP GB (a) / April 2014...
  • Page 34 On the other hand, the ultrasound echo will be weaker the longer the distance and therefore difficult to measure. A compromise must therefore be found between accuracy and ease of finding the ultrasounds. This compromise depends on the application (fluid, quality of the wall, diameter, etc.). NT UF 821 CP GB (a) / April 2014...

  • Page 35: Installing Probes And Connectors

    - "traditional" gel for temporary measurements at ambient temperature and without too much humidity, - high temperature gel (<300°C), - grease in the case of high humidity (quality depending on temperature). NT UF 821 CP GB (a) / April 2014...

  • Page 36: Installing The Probe

    (the coupling medium film could be altered/broken). 4.4.3. Inserted probes Preliminary comment: before you do anything, you must check with Ultraflux whether your probes can be extracted under load or not. Whether an inserted probe may be extracted under load or not is determined by the probe used and the application conditions of your measuring point (pressure, fluid measured, etc.).

  • Page 37: Screw Probes

    2) Screw probes step: Check the position of the bosses relative to the drawing provided by Ultraflux step: Check the state of the seal face which must be free of irregularities and dirt. Seal faces which are rusted, battered or generally in a bad state of repair must not be used.

  • Page 38: Chapter 5: Using And Configuring The Uf 821

    CHAPTER 5: USING AND CONFIGURING THE Uf 821 NT UF 821 CP GB (a) / April 2014...

  • Page 39: Using The Uf 821

    5.1 Using the Uf 821 The Uf 821 has a screen and a keypad which can be used to configure and view measurements as they are taken. LEDs indicate the status of the measurement and of the flow meter communication.

  • Page 40: Keypad

    If you are on the first page of a menu, pressing "A" causes selection of the last page of the menu. If you are on the last page of the menu, pressing "B" returns you to the first page. NT UF 821 CP GB (a) / April 2014...

  • Page 41: Leds

    "Measurement" Mode:  After powering on the Uf 821, the machine moves into measurement mode after a few seconds and displays the screen (or page) that was previously selected as priority. To choose this "default" Measurement screen, select and validate it by pressing "B"...

  • Page 42: Main Configuration Elements

    Advanced: mode allowing the complete adjustment of the flow meter settings. This mode is reserved for users with detailed knowledge of the transit time difference flow measuring technique and with some idea of hydraulic concepts. NT UF 821 CP GB (a) / April 2014...

  • Page 43: Flow Meter Menu ("Settings" Mode)

    ADVANCED CONFIGURATION: settings of the simulation mode, the special probes, the specific codes for ultrasonic treatment, etc.  ECHO DISPLAY: display of the echo signals of the ultrasonic probes.  FIRMWARE UPDATE: update of the firmware. NT UF 821 CP GB (a) / April 2014...

  • Page 44: Simple Configuration

    This command reinitialises the flow meter (to factory configuration). 3) Confirmation (of reinitialisation) Reinitialisation of the flow meter requires the user to enter a field requiring confirmation (protection against handling errors). NT UF 821 CP GB (a) / April 2014...

  • Page 45: Configuration

    Each flow meter can be assigned a label with up to 8 characters (registration number). The position of the current character is chosen using the ▼ and ▲ keys. To scroll through the characters, use the < and > keys. NT UF 821 CP GB (a) / April 2014...

  • Page 46: Back Light

    3) Flow graph The flow graph is one of the Measurement screens. This shows the changes in a particular magnitude in the form of a curve (see the possible magnitudes below). NT UF 821 CP GB (a) / April 2014...

  • Page 47: Chord Settings

    5) Type of fluid In "simple" configuration mode, the fluid must be water at ambient temperature (cannot be modified). 6) Definition of the pipe The pipe diameter, thickness and material must be defined. NT UF 821 CP GB (a) / April 2014...

  • Page 48: Totalizer Configuration" Menu (If Enabled)

    2 parties). On request and before shipping, it is possible to authorise the resetting of totalizers. On site, only an Ultraflux operative will be able to reset the totalizers. To reset a totalizer (if authorised): 1. Switch to measurement mode (long press on the Fn key) on the page of the totalizer concerned, 2.

  • Page 49: Inputs/Outputs" Menu (If Enabled)

    Relay. The menu only appears if inputs or outputs are installed on the flow meter. To install additional inputs/outputs, please contact Ultraflux to find out the specifications of all available inputs/outputs. 1) Current input and voltage input module The possible options are: ...

  • Page 50: Temperature Input Module

    The possible options are:  OFF: disabled,  PT100-PT1000 mode 2-, 3- or 4-wire (for further details, contact Ultraflux). Define: the type of sensor, Pt 100 or Pt 1000, the type of assembly, 2-wire, 3-wire or 4-wire, the value of the filter and the memory, any offset.

  • Page 51: Relay Output Module

    Closed:  The relay is on if the Uf 821 is powered on, and off if it is not powered on. This choice therefore allows the relay to be used to detect the presence of the power supply (positive safety).
  • Page 52 Select the magnitude that you wish to associate with the output using the chapter headers (function) and the chapter items (value). the value relating to 0 hertz. the value relating to 1 Khertz. the value if a fault occurs. NT UF 821 CP GB (a) / April 2014...

  • Page 53: Logger Settings" Menu (If Enabled)

    10 mins, 15 mins, 30 mins, 1 hr, 2 hrs, 6 hrs, 12 hrs and 24 hrs. 6) Logger autonomy This field, which cannot be changed, shows the remaining autonomy of the logger. NT UF 821 CP GB (a) / April 2014...

  • Page 54: Logger Variables

    Flow measurement Logger Time (s) The vertical lines (blue) show when logger recording is triggered. If the variation of the flow is greater than the configured threshold, the logger forces a recording. NT UF 821 CP GB (a) / April 2014...

  • Page 55: Echo Display" Menu

    The measurement is carried out on the first movement to 0 of the cycle which crosses this threshold. On the bottom left is shown the travel time difference of the ultrasounds (does not include ∆ T0). NT UF 821 CP GB (a) / April 2014...

  • Page 56: Normal Configuration

    Then the flow metering system faults itself if there are still no new valid flow rate measurements. Time Configured storage time NT UF 821 CP GB (a) / April 2014...

  • Page 57: Filter

    20 seconds, give the time constant a value of 40 or 60 s. However, you must ensure that the time constant is not too large, since this would risk masking significant events. NT UF 821 CP GB (a) / April 2014...

  • Page 58: Delta T0 And Auto Zero

    - change the Delta C to widen or shorten the search window. If the echo is on the right, the value of C must be lowered. Conversely, if the echo is on the left, the value of C must be increased. NT UF 821 CP GB (a) / April 2014...

  • Page 59: Deletion Rate (Qeff)

    6) Deletion rate (Qeff) The deletion rate is the flow rate below which the flow meter will display 0. This gives you a clear indication of a flow rate considered to be null. NT UF 821 CP GB (a) / April 2014...

  • Page 60: Advanced Configuration

    In Advanced mode, you can define the wall through 3 different materials/layers. If no material shown in the list is the same as that making up your pipe, select "OTHER": you will then be able to define the appropriate celerity for the sound. NT UF 821 CP GB (a) / April 2014...

  • Page 61: Laminar/Turbulent Transition

    Using the maximum gain setting, you can reject measurements if the gain exceeds the value entered in the flow meter. Important: You are strongly advised to contact Ultraflux before modifying these settings. NT UF 821 CP GB (a) / April 2014...

  • Page 62: Weighting Coefficients Of The Chords

    + and – 0.8090 0.1382 Please feel free to contact Ultraflux to determine the value of the weighting coefficients. 5.6.2 "Linearisation settings" menu One last action possible on the flow is the linearisation of the result. Depending on the flow, the flow is corrected by X% based on a pre-defined table: The parameter Q ref defines the maximum flow used for the linearisation.

  • Page 63: Advanced Settings" Menu

    0 and 2 times the indicated value. 2) Special probes It may be necessary in certain cases to define a probe which is not referenced in the list of Ultraflux probes. Before using this option, you are strongly recommended to contact Ultraflux.

  • Page 64: Measurement" Mode

    (the higher the gain, the more difficult it is to obtain a measurement),  IQ quality index (100% indicates a very good measurement, 0% indicates that the measurement is not possible). NT UF 821 CP GB (a) / April 2014...

  • Page 65: Totalizers

    This page shows the status of the logger and the last recording made. 7) Events These pages are used to find out whether there is a problem on the flow meter and to localize it in order to resolve it. NT UF 821 CP GB (a) / April 2014...

  • Page 66: Distance Between Probes

    The information from the various pages in the "measurement" mode allow you to check whether your measurements are consistent. The gain and IQ (Quality Index) values also provide you with information on the quality of your measurement. NT UF 821 CP GB (a) / April 2014...

  • Page 67: Chapter 6: Function Engine

    CHAPTER 6: FUNCTION ENGINE NT UF 821 CP GB (a) / April 2014...

  • Page 68: Principle

    6.1 Principle Each Uf 821 includes a miniature PLC. This PLC allows Ultraflux to easily install additional features for this flow meter. On request, Ultraflux can quickly integrate a new feature for your Uf 821. 6.2 Application example: Calorimetry 6.2.1 Water temperature calculation The water temperature can be determined from its celerity (via a calculation).
  • Page 69 Caloric heat flow measurement on a heater 17:57:07 18:00:00 18:02:53 18:05:46 18:08:38 18:11:31 18:14:24 18:17:17 18:20:10 Time delta_T (°C) Power (kW) Energy (kW.h) NT UF 821 CP GB (a) / April 2014...

  • Page 70: Chapter 7: Pc Software

    CHAPTER 7: PC SOFTWARE NT UF 821 CP GB (a) / April 2014...

  • Page 71: Introduction

    The program is run by double-clicking the icon associated with the software and placed on the desktop, or by selecting the program via Start \ Programs \ Ultraflux \ software corresponding to your flow meter. NT UF 821 CP GB (a) / April 2014...

  • Page 72: Connecting The Flow Meter To The Pc

    7.1.2 Connecting the flow meter to the PC To connect the Uf 821 to the PC, you must connect the lead provided (serial link or USB cable). The exchanges are made in the JBus/ModBus protocol, the PC being the master and the Uf 821, identified by its number, being the slave.

  • Page 73: Configuration Window

    (Excel by default, if this is installed on your computer). It also includes a "Autosearch" button used to automatically detect the presence of an Ultraflux flow meter. Comment: To use the serial link, the transmission speed can be set from 300 to 115,200 bauds, the fastest speed being preferable, especially for data-logger downloads.

  • Page 74: File Menu

    7.1.6 File menu The File menu allows you to open a saved file ("Open" command), or prepare a settings file offline ("New" command). Once the file is saved, you can export it to a Uf 821. 7.1.7 Measurement window The measurement window is opened using the Dialogue/Measurement command.

  • Page 75: General" Tab

    2) "General" tab This tab displays the main information about the measurement: graphic display of the measurement, instant values of the flow rate and flow velocity, totalizers. NT UF 821 CP GB (a) / April 2014...

  • Page 76: Qa" Tab (Flow Rate)

    This tab displays the main information concerning the measurement channel: graphic display of the measurement, instant values of the flow rate and flow velocity and KH; information related to the measuring chords. Comment: There are as many tabs as there are pipes configured. NT UF 821 CP GB (a) / April 2014...

  • Page 77: Inputs/Outputs" Tab

    "Function" tab: definition of the engine input constants accessible to the user (when a function is located in the engine). "Advanced" tab: definition of the Advanced operating mode. "Inputs/outputs" tab: definition of the configuration of the inputs and outputs. NT UF 821 CP GB (a) / April 2014...

  • Page 78: General" Tab (In The "General" Drop-Down Menu)

    The software allows the date and time of the Uf 821 to be synchronized with those of the host PC: select the option "Synchronise with PC time" before saving the settings on the flow meter.

  • Page 79: Logger" Tab (In The "General" Drop-Down Menu)

    4) "Totalizers" tab (in the "General" drop-down menu) The screenshot below shows an example of settings in Advanced mode. All the settings displayed below have been described previously in this document (see section 5.4.3). NT UF 821 CP GB (a) / April 2014...

  • Page 80: Inputs/Outputs" Tab (In The "General" Drop-Down Menu)

    The screenshot below shows an example of settings in Advanced mode. All the settings displayed below have been described previously in this document (see section 5.4.4). You can choose whether or not to activate the Totalizer, Logger and Input/output functions resources. NT UF 821 CP GB (a) / April 2014...

  • Page 81: Pipe" Tab (In The "Pipe" Drop-Down Menu)

    7) "Definition of chords" tab (in the "Pipe" drop-down menu) The screenshot below shows an example of settings in Advanced mode. All the settings displayed below have been described previously in this document (see section 5.4.2). NT UF 821 CP GB (a) / April 2014...

  • Page 82: Linearization" Tab (In The "Pipe" Drop-Down Menu)

    8) "Linearization" tab (in the "Pipe" drop-down menu) The screenshot below shows an example of settings in Advanced mode. All the settings displayed below have been described previously in this document (see section 5.6.2). NT UF 821 CP GB (a) / April 2014...

  • Page 83: Archiving, Processing And Printing Of Saved Files

    You can then freely modify this data. 7.3 Settings files The Uf 821 has 11 spaces in its free memory for the storage of configurations (see part 5.4.1): you can therefore recall or save your selections.

  • Page 84: Appendix I: Characteristic Echo Signals

    Appendix I: Characteristic echo signals NT UF 821 CP GB (a) / April 2014...
  • Page 85 Comment: The signals observed are often longer than the one shown above. This is completely normal, the important criterion being the velocity of the signal rise above the threshold.  Slowly rising signal:  Signal distorted by an incorrect positioning of the probes: NT UF 821 CP GB (a) / April 2014...
  • Page 86 (pollution on the surface of the probe).  Presence of electromagnetic interference Comment: in this case, move the cables (in particular the probe cables) away from the power cables. Check the ground connections and the shielding. NT UF 821 CP GB (a) / April 2014...

  • Page 87: Appendix Ii: Speed Of Sound In Water

    Appendix II: Speed of sound in water NT UF 821 CP GB (a) / April 2014...
  • Page 88 (°C) C (m/s) t (°C) C (m/s) 1422.8. 1506.4. 1426.5. 1520.1. 1447.6. 1529.2. 1466.3. 1536.7. 1482.7. 1542.9. 1497 — — Approximate value: C = 1557 – 0.0245.(74 – t)2 Celerity (m/s) Temperature (C°) NT UF 821 CP GB (a) / April 2014...

  • Page 89: Appendix Iii Troubleshooting

    Appendix III Troubleshooting III.1 Diagnostic indications III.2 Description of fault bits III.3 Fault grid NT UF 821 CP GB (a) / April 2014...

  • Page 90: Iii.1 Diagnostic Indications

    Probes excessively clogged. Fluid too absorbent, too much slurry, excessively aerated. Contact us and we will work with you to find the best solution. Probes defective or Uf 821 malfunctioning. Contact us if your checks result in this conclusion. ...
  • Page 91 The message "open loop" appears permanently when setting a current output Cause: Break in the loop.  The message "outside limits" appears permanently or intermittently when setting an analogue input Cause: Current or voltage outside the range of use. NT UF 821 CP GB (a) / April 2014...

  • Page 92: Iii.2 Description Of Fault Bits

    Fault on an input/output module. Internal clock The clock time must be set correctly. Fault on the Qb pipe. Fault on the Qa pipe. Fault on the total flow. QT not valid Total flow invalid. NT UF 821 CP GB (a) / April 2014...
  • Page 93 Voltage A input value The measurement of voltage A is outside the authorized range. outside range Voltage B input value The measurement of voltage B is outside the authorized range. outside range NT UF 821 CP GB (a) / April 2014...
  • Page 94 Flow calculation Chord taken into account in the flow calculation. Fault Fault on a chord. Not valid Chord not valid. Function fault BIT No. FUNCTION NAME DESCRIPTION Fault Function output fault. NT UF 821 CP GB (a) / April 2014...

  • Page 95: Iii.3 Fault Grid

    The non-volatile memory is faulty; measurement is possible but not archiving by the logger. Contact Ultraflux. logger The logger data cannot be used or is corrupt. Contact Ultraflux. h/w I/O One of the inputs/outputs is no longer responding. Contact Ultraflux.

  • Page 96: Appendix Iv: Link Protocol Of The Uf 821

    Appendix IV: Link protocol of the Uf 821 IV.1 Serial link characteristics IV.2 Reading of N words (with N ≤ 125) IV.3 Modbus/Jbus table IV.4 CRC16 calculation algorithm NT UF 821 CP GB (a) / April 2014...

  • Page 97: Iv.1 Serial Link Characteristics

    For FLOAT type information, it must be possible to read two consecutive words (or 4 bytes). The format complies with the IEEE standard. For LONG type information, two consecutive words (or 4 bytes) must be read. NT UF 821 CP GB (a) / April 2014...

  • Page 98: Iv.2 Reading Of N Words (With N ≤ 125)

    2 bytes Response Data Slave no. number of bytes read value 1st word ….. value last word CRC16 Size 1 byte 1 byte 1 byte 2 bytes ….. 2 bytes 2 bytes NT UF 821 CP GB (a) / April 2014...

  • Page 99: Iv.3 Modbus / Jbus Table

    Height / Channel Description Point (2) FLOAT 0231 0431 1073 Water Height (2) FLOAT 0233 0433 1075 Water Height Max. Delta (2) FLOAT 0235 0435 1077 Fault ULONG 0237 0437 1079 0239 0439 1081 NT UF 821 CP GB (a) / April 2014...
  • Page 100 1135 Gain FLOAT 0271 0471 1137 FLOAT 0273 0473 1139 Fault ULONG 0275 0475 1141 Probe Reference USHORT 0277 0477 1143 Distance Between Probes USHORT 0278 0478 1144 0279 0479 1145 NT UF 821 CP GB (a) / April 2014...
  • Page 101 Value FLOAT 02E1 04E1 1249 Fault ULONG 02E3 04E3 1251 02E5 04E5 1253 IO 04B 02E5 04E5 1253 Value FLOAT 02E5 04E5 1253 Fault ULONG 02E7 04E7 1255 02E9 04E9 1257 NT UF 821 CP GB (a) / April 2014...
  • Page 102 0539 1337 Value FLOAT 0339 0539 1337 Fault ULONG 033B 053B 1339 033D 053D 1341 Function output 10 033D 053D 1341 Value FLOAT 033D 053D 1341 Fault ULONG 033F 053F 1343 NT UF 821 CP GB (a) / April 2014...

  • Page 103: Iv.4 Crc16 Calculation Algorithm

    = number of bits poly = calculation polynomial of CRC16 = 1010 0000 0000 0001 (generator polynomial = 2 X the first byte sent is the one with the least significant bits NT UF 821 CP GB (a) / April 2014...
  • Page 104 3.6 Wiring instructions _____________________________________________________________ 22 3.7 Connection to the protective ground (to be carried out first) ____________________________ 22 3.8 Wiring the Terminals ___________________________________________________________ 22 3.8.1 Alimentation _______________________________________________________ 22 3.8.2 Ultrasonic chords ___________________________________________________ 23 NT UF 821 CP GB (a) / April 2014...
  • Page 105 1) Flanged probes __________________________________________________________________ 36 2) Screw probes ___________________________________________________________________ 37 3) Probes with air lock ______________________________________________________________ 37 CHAPTER 5: USING AND CONFIGURING THE Uf 821 ____________________ 38 5.1 Using the Uf 821 ______________________________________________________________ 39 5.1.1 Operating mode ____________________________________________________ 39 5.1.2 Keypad ___________________________________________________________ 40 5.1.3 LEDs _____________________________________________________________ 41...
  • Page 106 1) Flow __________________________________________________________________________ 64 2) Pipe measurements ______________________________________________________________ 64 3) Specific information relating to the chords ____________________________________________ 64 4) Totalizers ______________________________________________________________________ 65 5) Date and time ___________________________________________________________________ 65 6) Info logger _____________________________________________________________________ 65 NT UF 821 CP GB (a) / April 2014...
  • Page 107 III.1 Diagnostic indications ______________________________________________________ 90 III.2 Description of fault bits_____________________________________________________ 92 III.3 Fault grid _________________________________________________________________ 95 Appendix IV: Link protocol of the Uf 821 ____________________________ 96 IV.1 Serial link characteristics ____________________________________________________ 97 IV.2 Reading of N words (with N ≤ 125) __________________________________________ 98 IV.3 Modbus / Jbus table ________________________________________________________ 99...

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