Agilent Technologies Switch/Measure manual Measurement Functions for the MUX Modules

Low Frequency Multiplexer Switch Modules 4

Measurement Functions for the MUX Modules

The MUX modules support the DMM measurement functions as shown in the following table.

	34921A	34922A	34923A	34923A	34924A	34925A	34925A
	40-Ch Arm	70-Ch Arm	40-Ch Reed	80-Ch Reed	70-Ch Reed	40-Ch FET	80-Ch FET
	MUX	MUX	MUX	MUX	MUX	MUX	MUX
Function			(2-Wire)	(1-Wire)		(2-Wire)	(1-Wire)
Voltage, AC/DC	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Current, AC/DC	Yes1	No	No	No	No	No	No
Frequency/Period	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Ohms 2-Wire	Yes	Yes	Yes5	Yes5	Yes5	Yes6	Yes6
Ohms 4-Wire	Yes	Yes	Yes5	No	Yes5	Yes6	No
Thermocouple	Yes2	Yes3	Yes3,4	Yes3,4	Yes3,4	Yes3	Yes3
RTD 2-Wire	Yes	Yes	Yes5	Yes5	Yes5	No	No
RTD 4-Wire	Yes	Yes	Yes5	No	Yes5	Yes6	No
Thermistor	Yes	Yes	Yes5	Yes5	Yes5	No	No

1Direct current measurements are allowed on channels 41 through 44 only (for all other channels, external shunts are required).

2Optional 34921T Terminal Block is required for thermocouple measurements with built-in internal reference junction.

3A fixed or external reference junction temperature is required for thermocouple measurement with this module.

4Impact of higher offset voltage specification (< 50 ∝V) must be taken into consideration.

51 kΩ or higher range used unless 100Ω series resistors are bypassed on module.

610 kΩ or higher range used for loads over approximately 300Ω due to series resistance of FET channels.

34980A User’s Guide 97