With twisted shielded pair thermocouple extension
wire, an IRt/c can be mounted as far as 300 m
(1.000 ft) from the readout device, even in a very
fierce electrical noise environment. The extraordi-
nary noise suppression characteristics designed
A demonstration test was performed with a 300 m
(1000 ft) coil of twisted shielded pair of extension
wire, with 30 m (100 ft) unwound, connecting an
IRt/c to a fast (100 ms response) A/D conversion
module to a computer.
into the IRt/c make this possible, without using a
transmitter. The IRt/c housing is electrically isola-
ted from the signal leads and is connected to the
Quick installation guide
As a noise generator, a 60 Hz 10,000 volt transformer
and spark generator was set up to spark within 15 cm
shielded ground of the extension cable. For long
(6”) of the wire. The test results showed less than
distances, the twisted shielded extension cable
should be used, and the shield connected to a good
pre-calibrted models
0.1°C (0.2°F) of noise at any relative position of the
wire, spark, and transformer.