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Find by Product Model Number: Examples: 34401A, E4440A

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Can I have multiple math functions (Null, Min-Max, dB, dBm, Limit) on at the same time on the 34401A?
No, the 34401A only allows one math function to be used at a time.

FAQ 2014-04-15

Where can I find manuals for discontinued and obsolete Hewlett-Packard and Agilent test equipment?
Most Agilent products have PDF manuals that can be found on product pages. Other vendors also supply old manuals.

FAQ 2013-11-22

How do I rack mount two instruments of different depths?
There are three ways to rack instruments of different depths side-by-side; for example, an Agilent 33220A with an Agilent 34401A.

FAQ 2010-10-12

What type of calibration certificate is shipped with the 34401A? How do I disable the secure mode for calibration? How often is calibration require...
The Agilent 34401A ships with a NIST (National Institute of Standards and Technology) traceable certificate of calibration.

FAQ 2010-07-23

How does excessive heat and cold affect the accuracy of Agilent 34401A measurements?
This can be determined by using the temperature coefficients published in the User's Guide. Notice the "Temperature Coefficient/degree C" column…

FAQ 2010-07-23

What programming languages does the Agilent 34401A accept?
By default, the Agilent 34401A recognizes the SCPI programming language.

FAQ 2009-11-30

Does the Agilent 34401A measure "true RMS" ac voltage and ac current?
Yes. The Agilent 34401A uses an analog conversion technique that gives true RMS readings regardless of waveshape as long as the signal is within the bandwidth and crest factor of the 34401A.

FAQ 2009-11-30

What types of memory are installed into the Agilent 34401A Digital Multimeter?
Please refer to the document linked to this page for a comprehensive listing of internal memory for the 34401A digital multimeter.

FAQ 2006-11-03

Does the Agilent 34401A use "AC" or "DC" coupling for AC voltage measurements?
The Agilent 34401A uses an AC-coupled input when measuring ACV, which means that the DC component is blocked and is not included in the measurement.

FAQ 2005-05-02

How do I calculate total measurement error on the Agilent 34401A?
The accuracy specifications for the Agilent 34401A are expressed in the form: '% of reading + % of range' which match the dominate sources of error, gain and offset.

FAQ 2005-02-09

What is the sample rate of the Agilent 34401A?
When configured for the fastest reading rate, the 34401A can sample at 1000 readings/second.

FAQ 2005-02-09

What is aperture time of the 34401A?
Aperture time is analogous to integration time or Number of Power Line Cycles (NPLCs).

FAQ 2005-02-09

Does the Agilent 34401A have a LAN IO Connection?
No. However, if you require Local Area Network (LAN) connectivity, consider the Agilent E5810A LAN-to-GPIB gateway.

FAQ 2004-09-23

Is there a way to measure low-level ac current using the Agilent 34401A?
Yes. The lowest specified measurement on the 1 A ac current range is 1% of the range, or 10 mA (see footnote 4 in the Data Sheet).

FAQ 2004-06-10

Can the Agilent 34401A scan multiple channels or take multiple measurements simultaneously?
No, but the Agilent 34970A has the ability to scan multiple channels.

FAQ 2003-06-02

Is there a carrying case available for the Agilent 34401A multimeter?
Yes, there is both an accessory pouch and a basic instrument transit case available for the 34401A.

FAQ 2002-12-26

When performing a measurement count query (SAMPLE:COUNT?) command, are the math functions reset in any way?
No. The stored values are only cleared when you turn the min-max function off, turn off the power, or perform a remote interface reset.

FAQ 2002-09-12

What is the voltage limit that is considered open for diode testing?
The 34401A diode test function was designed specifically for silicon diodes. The cutoff voltage for diode testing is 0.8 VDC.

FAQ 2002-09-12

Why does the "trig:coun inf" command produce error 531:Insufficient Memory?
You have programmed the meter to store the readings in the internal memory. The internal memory will only hold 512 readings therefore you get the error.

FAQ 2002-09-12

What is the part number for the User's Guide and Service Guide for the Agilent 34401A?
The part number for the English set of manuals including both the User's Guide and Service Guide is 34401-90100. The User's Guide and Service Guide are not sold separately.

FAQ 2002-09-11

What is the narrowest pulse that I can capture with an Agilent 34401A in min/max mode?
This is directly related to the sample rate for which your meter is configured.

FAQ 2002-09-11

Can I set the test current when making resistance measurements with the Agilent 34401A?
No, the test current is set depending on the range of the instrument. The specifications are the following:

FAQ 2002-09-11

Does the Agilent 34401A have external trigger capability?
Yes. The "Ext Trig" BNC terminal on the rear panel recives a low-true TTL pulse to trigger the instrument (pulse width >1 us).

FAQ 2002-09-11

How do I use the calibration message function of the Agilent 34401A?
You can use the calibration message feature to record calibration information about your multimeter.

FAQ 2002-09-11

Is the current path uninterupted during measuement range changes in the Agilent 34401A?
An open circuit does not occur when range changes are made during an autorange function. When the range changes, a 0.1 Ohm resistance is switched in parallel with the current shunt resistor.

FAQ 2002-09-10

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