Keysight U1271A User manual

Keysight U1271A/U1272A

Handheld Digital Multimeter

Quick Start Guide

Verify that you received the following items in the shipment of

your multimeter:

✔One pair of red and black test leads

✔One pair of 4 mm test probes

✔One K-type thermocouple lead kit

✔Four 1.5 V AAA alkaline batteries

✔Printed copy of the U1271A/U1272A Quick Start Guide

✔Printed copy of the Certificate of Calibration

If any item is missing or damaged, keep the shipping materials

and contact the nearest Keysight Sales Office.

NOTE

The descriptions and instructions in this guide apply to the

U1271A and U1272A Handheld Digital Multimeters.

The model U1272A appears in all illustrations.

All related documents and software are available for download

at www.keysight.com/find/hhTechLib.

Quick Start Guide

Keysight U1271A/U1272A

Handheld Digital Multimeter

U1271A/U1272A Handheld Digital Multimeter

Differences between the U1271A and U1272A

2 U1271A/U1272A Quick Start Guide

Differences between the U1271A and U1272A

The U1272A model offers these additional functions:

•ZLOW (low input impedance) measurements

•Smart Ωmeasurements

•Auto-diode tests

•AC+DC voltage and current measurements

•J-type thermocouple temperature measurements

•30 Ωand 300 MΩranges for resistance measurements

•dBm and dBV measurements with selectable impedance

•Data logging up to 10,000 memories

The U1271A model has one differing function:

•Qik-V tests

Install the Batteries

Your multimeter is powered by four 1.5 V AAA alkaline batter-

ies (included with the shipment).

1Turn the rotary switch to OFF and remove

the test leads from the terminals.

2Lift the tilt stand and loosen the screws

with a suitable Phillips screwdriver.

3Remove the battery cover and observe the

polarity markings.

4Insert the batteries and replace the battery cover and screws.

Turn On the Multimeter

To power ON your multimeter, turn the rotary switch to any

other position.

NOTE

Your multimeter is capable of remote data logging. To use this

feature, you will need an IR-USB cable (U1173A, purchased

separately) and the Keysight GUI Data Logger Software (down-

loadable from www.keysight.com/find/hhTechLib).

U1271A/U1272A Handheld Digital Multimeter

The Multimeter at a Glance

U1271A/U1272A Quick Start Guide 3

The Multimeter at a Glance

Display screen

Keypad

Rotary switch

Input terminals

Test lead/probe holders

IR communication port

Battery access cover

Tilt stand

U1271A/U1272A Handheld Digital Multimeter

Understanding the Rotary Switch

4 U1271A/U1272A Quick Start Guide

Understanding the Rotary Switch

U1271A U1272A

NOTE

Press to switch between the shifted and regular func-

tions.

Shift

View

Esc

Legend Description

AC V with Low Pass Filter

AC mV with Low Pass Filter

DC, (AC, or AC+DC V, U1272A only)

DC, (AC, or AC+DC mV, U1272A only)

Resistance/Continuity/(Smart Ω, U1272A only)

Diode/(Auto-diode, U1272A only)

Capacitance/Temperature

AC, DC, or (AC+DC mA and A, U1272A only)

AC, DC, or (AC+DC μA, U1272A only)

AC/DC V check for signal identification (U1271A only)

ZLOW (low input impedance) AC/DC V for checking

ghost voltages (U1272A only)

Smart

Auto

Qik-V

LOW

U1271A/U1272A Handheld Digital Multimeter

Understanding the Keypad

U1271A/U1272A Quick Start Guide 5

Understanding the Keypad

Legend Key response when pressed for:

Less than 1 second More than 1 second

Sets the Null/Relative

mode.

Sets the Scale mode for

the specified ratio and

unit display.

Starts and stops the

MaxMin recording.

Starts and stops the

Peak recording.

Freezes the present

reading in the display.

Automatically freezes

the present reading once

the reading is stable.

Switches between avail-

able dual-combination

displays.

Exits the Hold, Null,

MaxMin, Peak, fre-

quency test, and dual

display modes.

Turns the backlight

on/off.

Enters/Exits the multim-

eter’s setup menu.

Switches between fre-

quency, pulse width, and

duty cycle measure-

ments.

Starts and stops the

Data Logging.

Sets a manual range. Enables autoranging.

Switches between the

regular and shifted

(icons printed in orange)

functions.

Enters the Log Review

menu.

Scale

Null

Peak

MaxMin

Auto

TrigHold

Exit

Dual

Setup

Hz%ms

Log

Auto

Range

Shift

View

Esc

U1271A/U1272A Handheld Digital Multimeter

Understanding the Input Terminals

6 U1271A/U1272A Quick Start Guide

Understanding the Input Terminals

WARNING

Ensure that the terminal connections are correct for that

particular measurement function before starting any

measurement. To avoid damage to the device, do not

exceed the input limit.

Rotary position Input terminals Overload protection

1000 Vrms

1000 Vrms for short

circuit <0.3 A

11 A/1000 V, 30 kA

fast-acting fuse

440 mA/1000 V, 30 kA

fast-acting fuse

Qik-V

LOW

Smart

Auto

U1271A/U1272A Handheld Digital Multimeter

Performing Measurements and Tests

U1271A/U1272A Quick Start Guide 7

Performing Measurements and Tests

Voltage measurements

The figure below highlights the primary functions allowing

voltage measurements in your multimeter.

Set up your multimeter as shown in the figure below to per-

form voltage measurements. When measuring DC voltage from

a mixed signal in DC measurement mode, ensure that the Filter

( ) is enabled.

U1271A U1272A

U1271A/U1272A Handheld Digital Multimeter

Performing Measurements and Tests

8 U1271A/U1272A Quick Start Guide

1Press for more than 1 second to enter the multimeter’s

setup menu.

2Press or until is shown on the

secondary display.

3Press or to enable the Filter.

Refer to the table below for the respective firmware ver-

sions.

4Press to save your changes.

5Press and hold until the multimeter restarts and returns

to normal operation. Turn the multimeter to DC Voltage

mode to verify that the LPF symbol is turned on.

LPF during AC measurements:

•Passing the measured signal through a LPF help blocks

unwanted voltages such as electronic noise.

•Use the LPF function to improve measurement on compos-

ite sine waves that are typically generated by inverters and

variable frequency motor drives.

Version 2.00 Version 2.04 or newer

on dC

CAUTIONCAUTION

To avoid possible electric shock or personal injury, enable

the Filter ( ) to verify the presence of hazardous DC

voltages. Displayed DC voltages can be influenced by high

frequency AC components and must be filtered to assure

an accurate reading.

Press while performing AC

voltage measurements to pass the

measured signal through a low pass

filter.

Setup

Peak

MaxMin

Auto

Range

Exit

Dual

Setup

Hz%ms

Log

Setup

Shift

View

Esc

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