Keysight U1273a Bedienungsanleitung

Keysight U1273A/U1273AX

Handheld Digital Multimeter

Quick Start Guide

U1273A/U1273AX Handheld Digital Multimeter

U1273A/U1273AX Quick Start Guide 1

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 (for U1273A) or lithium

batteries (for U1273AX)

✔Printed copies of the Certificate of Calibration (CoC) and

the U1273A/U1273AX Quick Start Guide (this manual)

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

U1273A/U1273AX handheld digital multimeter.

All related documents and software are available for download

at www.keysight.com/find/hhTechLib.

U1273A/U1273AX Handheld Digital Multimeter

Install the Batteries

2 U1273A/U1273AX Quick Start Guide

Install the Batteries

Your multimeter is powered by four 1.5 V AAA batteries

(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 from the

OFF position to any other position.

Auto Dim

By default, the multimeter’s Auto Dim function is enabled. The

multimeter’s backlight will dim automatically after 90 seconds

of inactivity. Press any button to cancel this effect and reset

the Auto Dim timer.

You may change how the multimeter’s backlight behavior

through the Setup menu. Refer to the User’s Guide for further

instructions.

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).

U1273A/U1273AX Handheld Digital Multimeter

The Multimeter at a Glance

U1273A/U1273AX Quick Start Guide 3

The Multimeter at a Glance

Display screen

Keypad

Rotary switch

Input terminals

Test lead/probe holders

IR communication port

Battery cover

Tilt stand

(Lift tilt stand for access)

U1273A/U1273AX Handheld Digital Multimeter

Understanding the Rotary Switch

4 U1273A/U1273AX Quick Start Guide

Understanding the Rotary Switch

NOTE

Press to switch between the primary and shifted func-

tions shown on the rotary switch.

Shift

View

Esc

Legend Description

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

ghost voltages

Off

AC V

AC V with Low Pass Filter

AC mV

AC mV with Low Pass Filter

DC V

AC V or AC+DC V

DC mV

AC mV or AC+DC mV

Resistance

Continuity or Smart (offset compensation)

Diode

Auto-diode

Capacitance

Temperature

DC mA (or A)

AC mA (or A) or AC+DC mA (or A)

DC A

AC Aor AC+DC A

LOW

Smart

Auto

U1273A/U1273AX Handheld Digital Multimeter

Understanding the Keypad

U1273A/U1273AX 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 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.

Increases the OLED

brightness incremen-

tally when LOW,

MEDIUM, or HIGH set-

ting is selected.

Enters and exits the mul-

timeter’s Setup menu.

Switches between fre-

quency, pulse width, and

duty cycle measure-

ments.

Starts and stops the

Data Logging.

Sets a manual range and

disables autoranging. Enables auto-ranging.

Switches between the

primary and shifted

functions.

Enters and exits the Log

Review menu.

Scale

Null

Peak

MaxMin

Auto

TrigHold

Exit

Dual

Setup

Hz%ms

Log

Auto

Range

Shift

View

Esc

U1273A/U1273AX Handheld Digital Multimeter

Understanding the Input Terminals

6 U1273A/U1273AX 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

fast-acting fuse

440 mA/1000 V

fast-acting fuse

LOW

Smart

Auto

U1273A/U1273AX Handheld Digital Multimeter

Performing Measurements and Tests

U1273A/U1273AX 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.

U1273A/U1273AX Handheld Digital Multimeter

Performing Measurements and Tests

8 U1273A/U1273AX Quick Start Guide

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

setup menu.

2Browse to Menu 6 >Filter, and press to edit the

value.

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 1.64 or older Version 1.95 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

Hz%ms

Log

Exit

Dual

Setup

Hz%ms

Log

Setup

Shift

View

Esc

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