Keysight 34921A - Measurement Functions for the Multiplexer Modules

10 Keysight 34921A-34925A Low Frequency Multiplexer Modules User’s Guide
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)
34922A
40-ch
Armature
Mux
34922A
70-ch
Armature
Mux
34923A
40-ch
Reed Mu
x
(2-Wire)
34923A
80-ch
Reed Mux
(1-Wire)
34924A
70-ch
Reed Mu
x)
34925
A
40-ch
FETMux
(2-Wire)
34925A
80-ch
FETMux
(1-Wire)
Voltage, AC/DC Yes Yes Yes Yes Yes Yes Yes
Current, AC/DC Yes
1
No No No No No No
Frequency/Period Yes Yes Yes Yes Yes Yes Yes
Ohms 2-Wire Yes Yes Yes
5
Yes
5
Yes
5
Yes
6
Yes
6
Ohms 4-Wire Yes Yes Yes
5
No Yes
5
Yes
6
No
Thermocouple Y
es
2
Yes
3
Yes
3,4
Yes
3,4
Yes
3,4
Yes
3
Yes
3
RTD 2-Wire Yes Yes Yes
5
Yes
5
Yes
5
No No
RTD 4-Wire Yes Yes Yes
5
No Yes
5
Yes
6
No
Thermistor Y
es Yes Yes
5
Yes
5
Yes
5
No No
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 V) must be taken into consideration.
5
1 k or higher range used unless 100 series resistors are bypassed on module.
6
10 k or higher range used for loads over approximately 300 due to series resistance of FET channels.
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