Permits monitoring of up to nine thermocouples or other transducers
The nine signal channels use a guarded 2-pole configuration
An isothermal block provides electrical isolation up to 42V while assuring excellent thermal conductivity between cold junction terminations
A sensing device mounted in the isothermal block monitors the cold junction and outputs a calibrated reference voltage that is linearly related to the temperature
The Keithley 7057A, Scanner Card, provides a higher change in reference output for improved cold junction sensitivity. Formulae for converting the voltage outputs of all of the most popular thermocouple types are included in the manual. The contact potential of <1µV per channel translates to <0.025ºC error for precision measurements on type K thermocouples.