Rosemount 3244MV, Reference Manual

Page: 10 / 62

Reference Manual
00809-0100-4799, Rev BA
September 2002
Model 3244MV
2-2
CONSIDERATIONS
General
Electrical temperature sensors such as RTDs and thermocouples produce
low-level signals proportional to temperature. The Model 3244MV
temperature transmitter converts the analog sensor signal to a digital signal
that is relatively insensitive to lead length and electrical noise. This current
signal is then transmitted over the bus to the configuration device and the
control room.
Electrical
Proper electrical installation is necessary to prevent errors due to sensor lead
resistance and electrical noise. Shielded, twisted cable should be used for
best results in electrically noisy environments. Refer to “Sensor Connections”
on page 2-9 for more information.
Power Supply
The transmitter requires between 9 and 32 V dc to operate and provide
complete functionality. The dc power supply should provide power with less
than 2% ripple.
Power Filter
A profibus segment requires a power conditioner to isolate the power supply
filter and decouple the segment from other segments attached to the same
power supply.
Mechanical
The Model 3244MV transmitter can be mounted directly to the sensor or apart
from the sensor using an optional mounting bracket. Using the bracket, the
transmitter can be mounted either to a flat surface or to a 2-inch diameter pipe
(see “Mounting Brackets” on page A-7).
Mounting
The transmitter may require supplementary support under high-vibration
conditions, particularly if used with extensive thermowell lagging or long
extension fittings. Pipe-stand mounting, using one of the optional mounting
brackets, is recommended for use in high-vibration applications.
Access Requirements
When choosing an installation location and position, take into account the
need for access to the transmitter.
Electronics Housing
Mount the transmitter so the terminal side and terminal side is accessible.
Be sure to allow adequate clearance for cover removal. When adding a
LCD meter, mount the circuit-side of the transmitter in a visible position.
Tagging
Commissioning Tag
The Model 3244MV has been supplied with a removable commissioning
tag that contains both the Device ID and a space to record the device tag.
The Device ID is a unique code that identifies a particular device in the
absence of a device tag. The device tag is used as an operational
identification for the device and is usually defined by the Piping and
Instrumentation Diagram (P & ID).