Weather Radio User Manual

1-3
CONSIDERATIONS
General Electrical temperature sensors such as RTDs and thermocouples
produce low-level signals proportional to their sensed temperature. The
Models 244EH and 244ER transmitters convert the low-level sensor
signal to a standard 4–20 mA dc signal that is relatively insensitive to
lead length and electrical noise. This current signal is then transmitted
to the control room via two wires.
Mechanical When choosing an installation location and position, take into account
the need for access to the transmitter.
Wiring Connections
Make wiring connections through the cable entry in the side of the
connection head. Be sure to provide adequate clearance for
cover removal.
Electrical Proper electrical installation is necessary to prevent errors due to
sensor lead resistances and electrical noise. Shielded cable should be
used in electrically noisy environments.
Environmental The transmitter electronics module is permanently sealed within the
housing, resisting moisture and corrosive damage. Verify that the
operating atmosphere of the transmitter is consistent with the
appropriate hazardous locations certifications.