Measurement Functions For The Multiplexer Modules - Agilent Technologies 34921A User Manual

Low Frequency Multiplexer Modules

Measurement Functions for the Multiplexer Modules

The MUX modules support the DMM measurement functions shown in the
following table.
Measurement Function(s)
Voltage, AC/DC
Current, AC/DC
Frequency/Period
Ohms 2-Wire
Ohms 4-Wire
Thermocouple
RTD 2-Wire
RTD 4-Wire
Thermistor
1
Direct current measurements are allowed on channels 41 through 44 only (for all other channels, external shunts are required).
2
Optional 34921T Terminal Block is required for thermocouple measurements with built-in internal reference junction.
3
A fixed or external reference junction temperature is required for thermocouple measurement with this module.
4
Impact of higher offset voltage specification (< 50
Ω
5
1 k or higher range used unless 100
Ω
6
10 k or higher range used for loads over approximately 300
2
34921A 34922A 34923A
40-ch 70-ch
Armature Reed Mux
Armature
Mux
Mux
Yes Yes
1
Yes
No
Yes Yes
Yes Yes
Yes Yes
2 3
Yes Yes
Yes Yes
Yes Yes
Yes Yes
µ
V) must be taken into consideration.
Ω
series resistors are bypassed on module.
Ω
due to series resistance of FET channels.
Agilent 34921A-34925A Low Frequency Multiplexer Modules User's Guide
34923A 34924A
40-ch 80-ch
Reed Mux Reed Mux)
(2-Wire) (1-Wire)
Yes Yes
No No
Yes Yes
5 5
Yes Yes
5
Yes No
3,4 3,4
Yes Yes
5 5
Yes Yes
5
Yes No
5 5
Yes Yes
34925A 34925A
70-ch 40-ch 80-ch
FET Mux FET Mux
(2-Wire) (1-Wire)
Yes Yes
No No
Yes Yes
5 6
Yes Yes Yes
5 6
Yes Yes
3,4 3
Yes Yes Yes
5
Yes No
5 6
Yes Yes
5
Yes No
Yes
No
Yes
6
No
3
No
No
No