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Fluke 754 [6/12] Fluke 789 processmete
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Why use “smart”
instrumentation?
Like most process plants, your orga-
nization is probably facing the dual
challenges of maximizing productiv-
ity while minimizing maintenance
costs. “Smart” digital transmitters
offer superior performance and reli-
ability, while saving time and effort
in maintenance and calibration.
Manufacturers of field instruments
have helped accelerate the change-
over by offering smart transmitters
at prices nearly as low as analog
units. As digital instruments using
the HART protocol quickly become
the standard, communicators and
calibrators are becoming essential
everyday tools.
What is HART?
HART, the Highway Addressable
Remote Transducer protocol, uses a
1200 baud Frequency Shift Keying
(FSK) signal to superimpose digital
information on the conventional
4-20 mA analog signal.
The Fluke 789 doubles your power giving you a
multimeter and a loop calibrator in one tool.
Key 789 features:
• 24 V loop power supply
• HART mode setting with loop power
(adds 250 ohm resistor)
• 200 % larger dual display
• mA drive up to 1,200 ohms
• Enhanced backlight with (2) brightness settings
• Improved battery power with (4) AA batteries
• 0 % to 100 % mA Span Check buttons to toggle
from 4 mA to 20 mA
• Infrared I/O serial port compatible with
FlukeView Software
• 5 V measurement capability on the 4 V range
for precise 1 V to 5 V measurements
• DMM designed to meet 1000 V IEC 1010
CAT III standards
• Precision 1000 V, 400 mA digital multimeter
Measure ac and dc volts, ac and dc current,
resistance, continuity and frequency
• True-rms ac voltage measurement
• Frequency measurement to 20 kHz
• 20 mA dc current source/loop calibrator/simulator
Manual Step (100 %, 25 %, Coarse, Fine) plus
Auto Step and Auto Ramp
• Externally accessible battery for easy battery
changes
• V overload protection on V, ohms, frequency, mA
(backed up by 440 mA 1000 V fuse)
Fluke 789 ProcessMeter
™
6 Fluke Corporation 750 Series Brochure
Why use the HART protocol?
HART is an industry standard de-
veloped to define the communica-
tions protocol between intelligent
field devices and a control system,
HART is the most widely used
digital communication protocol in
the process industry. More than
five million HART field instru-
ments are installed in more than
100,000 plants worldwide.
The HART protocol:
• Is supported by all of the major
suppliers of process field instru-
ments supported by the HART
Communication Foundation,
an industry-wide non-profit
organization. See the
http://www.hartcomm.org
for information on the HART
standard.
• Preserves present control
strategies.
• Allows traditional 4-20 mA
signals and digital
communication to share the
same two-wire loops.
• Provides important informa-
tion for installation and main-
tenance: Tag IDs, measured
values, range and span data,
product information and diag-
nostics.
• Reduces operation costs by
making it easier
to manage and fully utilize
“smart” instrument
networks.
Содержание
- Work smarter work faster 1
- Bonus feature available with product registration 2
- Fluke 750 series documenting process calibrators 2
- Get the knowledge straight from the product expert in these process tools videos 2
- Online now at www fluke com ptoolsvideos 2
- Work smarter work faster 2
- Fluke 750 series documenting process calibrators calibrators as versatile as you are 3
- Fluke 754 hart documenting process calibrator get hart ability 3
- It s easy to calibrate and maintain hart instrumentation with one powerful tool 4
- Hart applications 5
- Fluke 789 processmete 6
- Automatically record and document your work 7
- Ac voltage measurement 8
- Confidence interval k 3 8
- Dc current measurement 8
- Dc current output 8
- Dc voltage measurement 8
- Dc voltage output 8
- Frequency measurement 8
- Frequency sourcing 8
- Measurement function specifications 8
- Resistance measurement 8
- Resistance sourcing 8
- Sourcing simulation function specifications 8
- Allowance for traceability fluke specs are not relative specs but total specs 9
- C compensation factors are provided to permit specified use of the calibra tors over a wide 10 c to 50 c range 9
- Confidence interval k 3 9
- For example fluke specifications use a 3 sigma confidence interval k 3 this means that 99 of measurements will remain in specification over the stated period of time other manufacturers use a 2 sigma confidence interval k 2 this means that 95 of measurements will remain in specification over the stated period of time so one in 20 instruments are statistically likely to fail to perform to their specifications 9
- Including an allowance for uncertainty of standards that provide traceability to national standards 9
- Reference uncertainty performance of a calibrator at 23 c 3 c at the time it is 9
- Specifications must be carefully considered when comparing calibrators from different vendors 9
- Specs to limit your calibration support costs you choose your cal interval based upon the performance you need 9
- Temperature fluke process calibrator specs reflect performance from 18 c to 9
- Temperature measurement and simulation specifications 9
- Temperature resistance temperature detector 9
- Temperature thermocouples 9
- The most important components of a process calibrator specification are 9
- Time fluke 750 series calibrators are delivered with both one year and two year 9
- Verified by the manufacturer this specification does not include the effects of time and temperature two of the largest components of calibrator error 9
- Why you can depend on fluke calibrator specifications 9
- Pressure module specifications 10
- Pressure specifications 10
- The fluke family of 50 pressure modules 10
- All specifications in of full span specifications reflect a confidence interval of 95 11
- Pressure module specifications cont 11
- Fluke keeping your world up and running 12
- General specifications 12
- Ordering information 12
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