Agilent Technologies Switch/Measure manual Measurement Functions

2Features and Functions

Measurement Functions

The following table shows which DMM measurement functions are supported by each of the multiplexer modules.

Note that similar considerations must be taken into account on the 34931A, 34932A, and 34933A matrix modules. Since the matrix modules cannot be incorporated into a scan list, you must use the Stand- Alone DMM Mode for these modules.

	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.

Front Panel Operation: DMM or Channel (Configure) > DMM MEASUREMENT

Use the knob (or numeric keypad) to select the desired channel. Then select the desired measurement function for this channel. You are automatically guided to the next level of the menu where you can configure other measurement parameters (range, integration time, etc.).

Remote Interface Operation: You can select the measurement function using the CONFigure and MEASure? commands. For example, the following command configures the specified channel for dc voltage measurements.

CONF:VOLT:DC 10,DEF,(@3001)

16 34980A User’s Guide