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Specifications

ManualsBrandsAgilent Technologies ManualsComputer equipment34972A
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21
Multiplexer selection guide
Choose between the broad functionality of the 34901A, the
high speed scanning of the 34902A, or the single-ended
density of the 34908A. These three modules are the only
way to connect to the 34970A/34972A internal DMM. They
can be used to scan with external instruments as well.
All multiplexer modules employ break-before-make
scanning, ensuring only one closed channel (or channel
pair) at a time. Multiple channel closures are allowed on
the 34901A and 34902A modules when not configured
for scanning.
The 34908A does not allow multiple channel closures
at any time.
34901A
20-Channel General Purpose Multiplexer
• 60 ch/s scanning
• Two- and four-wire scanning
• Built-in thermocouple reference
junction
• 300 V switching
The Agilent 34901A is the most
versatile multiplexer for general
purpose scanning. It combines
dense, multifunction switching with
60-channel/second scan rates to
address a broad spectrum of data
acquisition applications.
Two- and four-wire channels can
be mixed on the same module. Two
additional fused inputs (22 channels
total) route up to 1 A of current to
the internal DMM, allowing ac and dc
current measurements without the
need for external shunt resistors.
34901A 34902A 34908A
Number of channels 20 + 2 16 40
Max scan speed 60 ch/s 250 ch/s 60 ch/s
Number of contacts 2 or 4 2 or 4 1
Temperature
Thermocouple ● ● ●
2-wire RTD ● ● ●
4-wire RTD ● ●
Thermistor ● ● ●
dc Volts ● ● ●
ac Volts ● ● ●
2-wire Ohms ● ● ●
4-wire Ohms ● ●
Frequency ● ● ●
Period ● ● ●
dc current ●
ac current ●