Fluke 754 User manual

July 2011
© 2011 Fluke Corporation. All rights reserved.
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

i
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
ii
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

1
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: [phone]
•Japan: [phone]
•Singapore: [phone]
•Anywhere in the world: [phone]
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
2
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
3
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
r.
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
Ω .
•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
Ω
and 270
Ω 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
4
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
5
+–
754
DOCUMENTING PROCESS CALIBRATOR
gks61.eps
Figure 3. HART Transmitter Connection

754
Users Guide
6
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 ••••