This reduces the effects of sensor self-heating which becomes important at low temperatures. The curve can be loaded at the factory or by the user via serial interface. The 234D adds an enclosure and a six-digit LED display of resistance as well as displaying temperature in kelvin. The current output changes linearly with sensor temperature. Output scale depends on the user selected temperature range.
Several switch selected ranges are available.
Highest accuracy and sensitivity are achieved when the output is set for a narrow temperature band. An optional 0 to 20 mA output is also available for users who wish to convert the output to a voltage reading that is scaled from zero. The outputs are isolated so several transmitters can be run off the same supply without interference. Mechanical mounting is made simple because the temperature transmitters are built on a standard size VME card. The transmitter does not use the VME electrical bus format, only its physical shape and power supply.