Fluke 754 Manuale utente

July 2011

All product names are trademarks of their respective companies.

754

HART Mode

Users Guide

LIMITED WARRANTY AND LIMITATION OF LIABILITY

This Fluke product will be free from defects in material and workmanship for three years from the date of purchase. This

warranty does not cover fuses, disposable batteries, or damage from accident, neglect, misuse, alteration, contamination, or

abnormal conditions of operation or handling. Resellers are not authorized to extend any other warranty on Fluke’s behalf.

To obtain service during the warranty period, contact your nearest Fluke authorized service center to obtain return

authorization information, then send the product to that Service Center with a description of the problem.

THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH AS FITNESS FOR A PARTICULAR

PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE IS NOT LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR

CONSEQUENTIAL DAMAGES OR LOSSES, ARISING FROM ANY CAUSE OR THEORY. Since some states or countries

do not allow the exclusion or limitation of an implied warranty or of incidental or consequential damages, this limitation of

liability may not apply to you.

Fluke Corporation

P.O. Box 9090

Everett, WA 98206-9090

U.S.A.

Fluke Europe B.V.

P.O. Box 1186

5602 BD Eindhoven

The Netherlands

11/99

Table of Contents

Title Page

Introduction .................................................................................................................... 1

How to Contact Fluke..................................................................................................... 1

HART Channel Selection ............................................................................................... 2

Connect to a HART Transmitter ..................................................................................... 3

Supported vs. Generic Transmitters............................................................................... 6

Communication Operations............................................................................................ 7

See Process Variables .............................................................................................. 9

Setup Operations....................................................................................................... 9

Basic..................................................................................................................... 9

Sensor .................................................................................................................. 10

Device Identification.............................................................................................. 10

HART Output ........................................................................................................ 11

HART Information ................................................................................................. 11

Service Operations .................................................................................................... 11

Abort Softkey............................................................................................................. 12

754

Users Guide

Analog Mode and HART Mode Interaction .................................................................... 12

HART Calibration........................................................................................................... 12

HART Mode Menus for Adjustment ............................................................................... 12

Calibrate a Supported HART Transmitter ...................................................................... 14

Loop Test.................................................................................................................. 15

Output Trim............................................................................................................... 16

Sensor Trim .............................................................................................................. 16

Duplicate a Transmitters Basic Information ................................................................... 18

Introduction

 Warning

To prevent possible electrical shock, fire, or

personal injury, read the Safety Information

in the 753/754 Users Manual before you use

the 754 Documenting Process Calibrator.

Adjustment is necessary for analog transmitters during

calibration. With HART(Highway-Addressable Remote

Transducer) transmitters, adjustments are by remote

command. For these adjustments, use of a

communication tool and a Calibrator is necessary. The

754 (Product or Calibrator) gives communication and

calibration functions in one tool.

This guide tells you how to use the HART communication

mode. HART mode is a procedure for the Product to

communicate over its serial HART interface to a HART

transmitter. See the 753/754 Users Manual for safety

information, analog mode use instructions, specifications,

and more general data. All of the Product functions shown

in the 753/754 Users Manual are available and can be

used with supported HART transmitters. The only

transmitters addressed in this manual are HART

transmitters.

Note

Some specific HART transmitter commands are

only available with supported devices.

How to Contact Fluke

To contact Fluke, call one of the following telephone

numbers:

•Technical Support USA: 1-800-44-FLUKE

(1-800-443-5853)

•Calibration/Repair USA: 1-888-99-FLUKE

(1-888-993-5853)

•Canada: 1-800-36-FLUKE (1-800-363-5853)

•Europe: +31 402-675-200

•Japan: +81-3-3434-0181

•Singapore: +65-738-5655

•Anywhere in the world: +1-425-446-5500

Or, visit Fluke's website at www.fluke.com.

To register your product, visit http://register.fluke.com.

To view, print, or download the latest manual supplement,

visit http://us.fluke.com/usen/support/manuals.

754

Users Guide

HART Channel Selection

For HART communication, use the HART connector on

the side of the Product or the mA jack on the front of the

Product. The procedure you use depends on the

application and preference.

Use Setup mode to choose the correct HART channel:

1. Push s. The first setup screen shows. See

Figure 1.

2. Push or to select HART Channel.

3. Push .

4. Push or to select HART Port or mA Jack.

5. Push .

The selection is kept in Product memory. The Product

uses this selection until it is changed in setup mode.

Depending on the selection, HART Port or mA Jack

shows at the top of the display when you push r.

Note

The figures in this guide show the mA Jack in

use for HART communication.

gnx19s.bmp

Figure 1. HART Channel Selection

HART Mode

Connect to a HART Transmitter

To connect and start communication with a HART

transmitter:

Note

If only a communication connection to a

transmitter that is powered in a loop is

necessary, attach the HART alligator clips to the

loop power terminals on the transmitter and push

1. Connect the Product mA jacks to the loop power

terminals of the transmitter. See Figure 3.

2. Connect the HART interface cable into the HART

jack, and then connect the alligator clips to the

terminals in step 1. There is no incorrect polarity. If

the HART signal is directed through the mA jack in

setup mode, this connection is not required.

3. Push r.

4. If the transmitter is not powered by a loop power

supply, push the Loop Power softkey to start loop

power.

Notes

•The Product supplies loop power

through an internal series resistance of

250

•If the Product shows a measurement of

0 mA, make sure you have not

reversed the current leads.

•If an external loop power supply is

used, a resistance of between 230

and 270

connected in series with the

external loop supply and the transmitter

is necessary.

5. The Product tries to connect to Poll Address 0 (single

transmitter per loop). If no connection is made, push

the Poll softkey to examine Poll Addresses 1 through

15 (multidrop).

6. When the Product establishes communication with

the transmitter, the Active Device screen shows. See

Figure 2. In a multidrop configuration, you must

choose a transmitter from a list, and push .

754

Users Guide

gnx06s.bmp

Figure 2. Active Device Screen

The Active Device screen supplies this data for all

transmitters:

•Poll address (if not 0)

•Model number and Tag ID

•PV (Primary Variable)

•PVAO (digital representation of the Analog Output)

•PV LRV (PV Lower Range Value)

•PV URV (PV Upper Range Value)

•Softkeys for accessing HART operation menus

HART Mode

Connect to a HART Transmitter

+–

754

DOCUMENTING PROCESS CALIBRATOR

gks61.eps

Figure 3. HART Transmitter Connection

754

Users Guide

Supported vs. Generic Transmitters

The Product communicates with most HART transmitters. “Supported Transmitters” are transmitters in which the Product is

programmed to use their device-dependent commands and software version. “Generic transmitters” are transmitters that are

not programmed in the Product. Table 1 shows the operations that are available for supported vs. generic transmitters in

single-point and multidrop configurations.

Table 1. Supported vs. Generic Transmitters (Devices)

Supported Transmitter Generic Transmitter

Menu Operation

Single Point Multidrop Single Point Multidrop

Top Level Active Device screen ••••

Basic (read/write, cloning capability) ••••

Sensor ••Read only Read only

(Temperature) Sensor (read/write) ••

Device Identification (read/write) ••••

HART Output (read/write) ••••

Setup

HART Information (read only) ••••

Loop Test •Not Available •Not Available

Pressure Zero Trim ••••

Output Trim •Not Available •Not Available

Service

Sensor Trim ••Not Available Not Available

Process Detailed process information ••••

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