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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 .
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
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