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Under the unit function’s ACV and DCV, the display rate of U1271/2A indicates 7 times per second, can GUI DATA LOGGER capture all 7 readings?
No, the GUI DATA LOGGER is running on different acquisition method than the unit’s display rate, therefore the fastest update rate is 1 sample per second.

FAQ 2011-05-05

What is the part # of the fuseholder cap for the small Front and Rear Current input fuse 3AT (A1F101 or F101) used on the Keysight 34401A Multimeter...
The small Front and Rear Current input fuse 3AT (A1F101 or F101) located on the rear panel is available as Keysight part number 2110-0780. This is a 3A, 250V metric fuse.

FAQ 2011-04-14

What is the best way to ensure simultaneous triggering of multiple units of modular products?
Using the cardcage, U2781A is the best way of ensuring simultaneous triggering of multiple units

FAQ 2010-12-20

Why won't Help (.hlp) files view properly with Windows Vista?
In order to view 32-bit Help (.hlp) files with Windows® Vista, you must download the WinHlp32.exe Help program from the Microsoft web site at

FAQ 2010-10-12

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, a Keysight 33220A with a Keysight 34401A.

FAQ 2010-10-12

Why am I getting a reading instead of zero when using U1252A/U1253A frequency counter measurement function although no measurement was done…
After the probes are connected to the U1252A/U1253A, the measured value will be automatically zeroed.

FAQ 2010-08-09

Why does the “C-End” (charge end) message appear on the secondary display of the U1252A Handheld Multimeter…
When the “C-End” message is displayed, it actually indicates that the battery is fully charged…

FAQ 2010-08-09

Can I measure AC voltage with the U1241B/U1242B Handheld Digital Multimeter (DMM) if there is a DC offset?
Yes, you can measure AC voltage with the U1241B/U1242B Handheld Digital Multimeter (DMM), even if there is a DC offset

FAQ 2010-08-08

Can I measure coil resistance with the U1241B/U1242B Handheld Digital Multimeter (DMM)?
Yes, you can measure coil resistance with the U1241B/U1242B Handheld Digital Multimeter (DMM)

FAQ 2010-08-08

How does excessive heat and cold affect the accuracy of Keysight 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 type of calibration certificate is shipped with the 34401A? How do I disable the secure mode for calibration? How often is calibration require...
The Keysight 34401A ships with a NIST (National Institute of Standards and Technology) traceable certificate of calibration.

FAQ 2010-07-23

Can I control the beeper sound volume for the audible continuity measurement?
No, you can't….

FAQ 2010-07-18

When will Keysight USB modular instruments and USB Modular DAQs supports Windows 7?
For 32 bit Windows 7, the supportability of modular instruments and DAQs will happen...

FAQ 2010-07-18

How wide range of resistivity can the 4339B measure when used with the 16008B?
The 4339B can measure surface resistivity up to 7 x 1017 Ω and volume resistivity up to 8 x 1018 Ω-cm, but it depends on the electrodes of the 16008B used.

FAQ 2010-07-02

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

FAQ 2010-05-16

When fabricating a custom test fixture for the Keysight 4339B, what are the recommendations to extend the measurement and interlock cables?

FAQ 2010-05-11

How does U3606A measure capacitance?
U3606A measures capacitance by applying known DC current to the capacitor and then calculate the change in voltage that occurs over a short aperture time.

FAQ 2010-05-10

What is the different between Frequency Function and Frequency Counter Function at U1252B/U1253B Series handheld Digital Multimeter?
The Frequency function measures up to 600kHz 1000V … Frequency Counter function measures upto 20 MHz at <30Vpp…

FAQ 2010-05-10

What types of internal memory does the Keysight 34410A and 34411A digital multimeters contain?
Please refer to the document linked to this page for a comprehensive listing of memory types installed into the 34410A and 34411A digital multimeters.

FAQ 2010-05-07

Can I perform measurement with my U1252A/U1253A Handheld Multimeter while charging the unit?
No, U1252A/U1253A Handheld Multimeter does not allow to perform measurement while charging…

FAQ 2010-05-05

Why USB modular instruments (U272XA, U2741A, U2751A and U2761A) is not detectable by E5813A?
PC is failed to enumerate the USB modular instrument.

FAQ 2010-04-09

How to check the condition of the fuses in U1253A/U1253B before you use it?
To test the fuses inside the U1253A/U1253B OLED display DMM, just follow the instructions as follows…

FAQ 2010-03-22

Can I program to control U1401B?

FAQ 2010-03-22

How can I perform adjustment on my U3401A or U3402A DMM when it is due for calibration?
If adjustment is required, you may send the instrument to your local Keysight Service Center…

FAQ 2010-03-22

Is U2741A compatible with E5813A?
U2741A is not compatible with E5813A.

FAQ 2010-03-22

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