Keithley KEITHLEY 7402 Thermocouple Scanner Card

The Keithley 7402 Nine Channel Thermocouple Scanner Card 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 42 V 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. Specifications. Number of Channels: 9. Card Configuration: Multiplexer. Contact Configuration: 2 form A. Maximum Voltage: 110 V. Maximum Current: 1 A. Maximum Power: 60 VA. Contact Potential: < uV. Contact Life: >10^8 closures cold switching; >10^6 closures at maximum signal levels. Connection Type: Screw terminal. Temperature Offset: ±0.05° C maximum from HI to LO of any channel or between any two adjacent channels in one column on the isothermal block. ±0.1° C maximum between any two terminals on the isothermal block. Maximum additional dynamic offset due to 10°C step change in environment: ±0.1°C after one hour settling. Reference Output: +200 uV/C (+54.63 mV at 0°C).