Manuale d’uso / di manutenzione del prodotto 744 del fabbricante Fluke
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® 744 Documenting Process Calibrator HART Mode Users Guide PN 691292 December 1998 © 1998 Fluke Corporation, All rights reserved. Printed in U.S.
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i Table of Contents Title Page Introduction ................................................................................................................... .. 1 How to Contact Fluke .................................................................
744 HART Mode Users Guide ii Calibrating a Supported HART Transmitter .................................................................... 15 Loop Test....................................................................................................
iii List of Tables Table Title Page 1. Supported vs. Non-Supported Instruments.........................................................................
744 HART Mode Users Guide iv.
v List of Figures Figure Title Page 1. Connecting to a HART Transmitter ........................................................................................ 5 2. 744 HART Mode Menu Tree .............................................................
744 HART Mode Users Guide vi.
1 Documenting Process Calibrator HART Mode Introduction w Warning To avoid electric shock, read the Safety Information in the 744 Users Manual before you use the Fluke 744 Documenting Process Calibrator. With analog transmitters, you must make a hardware adjustment during calibration.
744 HART Mode Users Guide 2 How to Contact Fluke To contact Fluke, call: USA and Canada: 1-888-99-FLUKE (1-888-993-5853) Europe: +31 402-678-200 Japan: +81-3-3434-0181 Singapore: +65- * -276-6196 Anywhere in the world: +1-425-356-5500 Or visit us on the World Wide Web: www.
Documenting Process Calibrator HART Mode Connecting to a HART Transmitter 3 Connecting to a HART Transmitter To connect to and begin to communicate with a HART transmitter, refer to Figure 1 and proce.
744 HART Mode Users Guide 4 pe06s.bmp The Active Device screen provides the following information for all transmitters, supported or generic: • Poll address (if not 0) • Model number and Tag ID .
Documenting Process Calibrator HART Mode Connecting to a HART Transmitter 5 RTD Transmitter -PS +PS M -IN +IN S Z 7 89 456 123 0 . V MEAS SOURCE SETUP mA V Hz TC RTD CLEAR (ZERO) ENTER TC mA mA V V RTD RTD SOURCE 300V MAX 30V MAX 30V MAX 30V MAX MEAS CAT DOCUMENTING PROCESS CALIBRATOR 744 pe01c.
744 HART Mode Users Guide 6 Supported vs. Generic Transmitters The calibrator communicates with virtually all HART transmitters. In addition, the calibrator is programmed to use device-dependent commands for a selection of HART transmitters and their software versions.
Documenting Process Calibrator HART Mode Supported vs. Generic Transmitters 7 Table 1. Supported vs. Generic Transmitters (Devices) Menu Operation Supported Transmitter Generic Transmitter Single Poin.
744 HART Mode Users Guide 8 Communication Operations Figure 2 shows the HART Mode menu tree. Availability of some elements in the menus depends on which transmitter you are using, and whether the transmitter is configured by itself on a current loop or in a multidrop connection.
Documenting Process Calibrator HART Mode Communication Operations 9 • Write protect • Alarm state • HART poll address • HART burst mode • HART burst command • Manufacturer • Model • De.
744 HART Mode Users Guide 10 Sensor From the Active Device screen press the Setup and Sensor softkeys to access the read-only Sensor Setup screen. This is where you can view information about the sensor in the transmitter, including serial number, limits, and span.
Documenting Process Calibrator HART Mode Communication Operations 11 HART Output From the Active Device screen press the Setup and HART Output softkeys to access the read/write HART Output screen. Here you can change the Poll Address (0 = single transmitter, any other address = multidrop), and control burst mode.
744 HART Mode Users Guide 12 Service Operations The Service softkey provides access to Loop Test, Pressure Zero Trim (where applicable), Output Trim, and Sensor Trim operations. For generic transmitters, only Loop Test, Output Trim, and Pressure Zero Trim are available.
Documenting Process Calibrator HART Mode Understanding HART Calibration 13 Understanding HART Calibration An analog transmitter has one stage of electrical conversion from a measured physical parameter to a 4-20 mA current loop output. A HART transmitter has the three stages shown in Figure 3.
744 HART Mode Users Guide 14 HART transmitter Computation Input Physical variable 4-20mA loop Sensor trim Pressure zero trim Loop test Output trim Output PV PV AO 744 Calibrator pe02f.
Documenting Process Calibrator HART Mode Calibrating a Supported HART Transmitter 15 Calibrating a Supported HART Transmitter An “as found” and “as left” transmitter calibration has an easier, more automated process for HART transmitters than for analog transmitters.
744 HART Mode Users Guide 16 7. Proceed with calibration as usual (described in the 744 Users Manual ). 8. Press the Adjust softkey. This returns you to HART mode, and presents you with the Service menu for the transmitter. 9. Do an Output Trim, a Sensor Trim, or both.
Documenting Process Calibrator HART Mode Calibrating a Supported HART Transmitter 17 Output Trim An Output Trim adjusts the tranmitter’s Output stage. You can perform an Output Trim on both generic and supported transmitters. To perform an Output Trim: 1.
744 HART Mode Users Guide 18 2. Use the u and d keys to select the Sensor Trim operation, and press e . 3. Follow the instructions on the display. For pressure, there is a message to connect a pressure module to the calibrator, and another to press the c key to zero the pressure module.
Documenting Process Calibrator HART Mode Cloning a Transmitter 19 Cloning a Transmitter Cloning copies the Basic Setup information from one transmitter to another. You can clone generic and supported transmitters. To use the calibrator to clone a transmitter: 1.
744 HART Mode Users Guide 20.
21 Index —A— abort, 12 active device screen, 4 analog mode, 12 as found, 15 as left, 15 —B— basic setup, 8 browser screen, 6 —C— calibrating a HART transmitter, 15 cloning, 19 communicatio.
744 HART Mode Users Guide 22 —O— output stage, 13 output stage, 16 output trim, 13, 17 —P— phone numbers for Fluke, 2 pressure module, 18 pressure zero trim, 13 process variables, 8 PV, 4 PVAO.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Fluke 744 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Fluke 744 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Fluke 744 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Fluke 744 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Fluke 744, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Fluke 744.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Fluke 744. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Fluke 744 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
