Quick Start 1
Keysight 34420A Service Guide 37
To Measure Temperature With Thermocouples
Thermocouple types: B, E, J, K, N, R, S, T
Reference: external thermistor, external fixed value, or internal thermistor.
Channel 2 only.
When using the internal thermistor as the temperature reference, you should
make a custom cable to connect the thermocouple wire directly to the input
terminals (see page 137).