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SECTION 1 GETTING STARTED
1.1
Unpacking
Remove the packing list and verify that you have received all equipment.
If you have any questions, contact the nearest Customer Service Department, as
listed on the cover of this manual.
Upon receipt of shipment, inspect the container and equipment for any signs of
damage. Note any evidence of rough handling in transit. Immediately report any
damage to the shipping agent.
Note: The carrier will not honor any claims unless all shipping material is saved for
their examination. After examining and removing contents, save packing materials
and carton in the event reshipment is necessary.
1.2 Safety and EMC Considerations
This instrument is a Class III device (8 to 50 Vdc).
Always use a power supply, which complies with EN 60950 safety standard.
EMC Considerations
• •
Whenever EMC is an issue, always use shielded cables.
• •
Never run signal and power wires in the same conduit.
• •
Use signal wire connections with twisted-pair cables.
• •
Install Ferrite Bead(s) on signal wires close to the instrument if EMC problems
persist.
Failure to follow all instructions and warnings may result in injury!
1.3
General Description
The TX92A Series transmitter accepts platinum 100 ohm sensor type RTDs and will
produce a standard 4-20 mA output signal proportional to that produced by its
attached RTD input. The transmitter does NOT provide isolation between its input and
the 4-20 mA output; therefore, an ungrounded RTD is suggested to prevent possible
ground loops.
The transmitter provides amplification, common-mode rejection and controlling the
current draw from an 8-to-50 Vdc source to produce the 4-to-20 mA output signal.
As much as 800 ohms dropping resistance may be used in the power leads of the
TX92A when the unit is energized from a 24 Vdc source because of the small
compliance voltage needed by the unit.
1
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