Atec Fluke-740 Series - Manual (Page 6)

Why use “smart” instrumentation?
Like most process plants, your organization is probably
facing the dual challenges of maximizing productivity
while minimizing maintenance costs. “Smart” digital
transmitters offer superior performance and reliability,
while saving time and effort in maintenance and
calibration. Manufacturers of field instruments have
helped accelerate the changeover 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.
Why use the HART protocol?
HART is an industry standard developed to define the
communications 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 instruments
are installed in more than 100,000 plants worldwide.
The HART protocol:
• Is supported by all of the major suppliers of process
field instruments supported by the HART Communi-
cation Foundation, an industry-wide non-profit
organization. See the Web site HYPERLINK
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 information for installation and
maintenance: Tag IDs, measured values, range and
span data, product information and diagnostics.
• Reduces operation costs by making it easier
to manage and fully utilize “smart” instrument
networks.
The Fluke-789 extends the proven performance of the
evolutionary Fluke-787 and adds many new features
and improvements.
Key New 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
• 0-100 % mA Span Check buttons to toggle from
4-20 mA
• Infrared I/O serial port compatible with FlukeView
Software
• 5 V measurement capability on the 4 V range for
precise 1-5 V measurements
787 features included in the 789:
• 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)
New Fluke 789
ProcessMeter
™
6 Fluke Corporation 740 Series Brochure