Agilent Technologies U1273A Bedienungsanleitung

Agilent Technologies

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 Agilent 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.agilent.com/find/hhTechLib.

Quick Start Guide

Agilent U1273A/U1273AX

Handheld Digital Multimeter

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 Agilent GUI Data Logger Software (down-

loadable from www.agilent.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 Ω(offset compensation)

Diode

Auto-diode

Capacitance

Temperature

DC mA (or A)

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

DC μA

AC μAor AC+DC μA

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.

U1273A/U1273AX Handheld Digital Multimeter

Performing Measurements and Tests

8 U1273A/U1273AX Quick Start Guide

LPF 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.

ZLOW measurements:

•Use the ZLOW (low input impedance) function to remove

ghost or induced voltages from your measurement.

•ZLOW can remove ghost voltages from your measurements

by dissipating the coupling voltage. Use ZLOW to reduce the

possibility of false readings in areas where the presence of

ghost voltages are suspected.

Press while performing ac

voltage measurements to pass the

measured signal through a low pass

filter.

Rotate the rotary switch’s position to

to enable low impedance mea-

surements.

Shift

View

Esc

LOW

U1273A/U1273AX Handheld Digital Multimeter

Performing Measurements and Tests

U1273A/U1273AX Quick Start Guide 9

Resistance measurements

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

form resistance measurements.

Smart Ωmeasurements:

•Use the Smart Ω(offset compensation) function to measure

resistors affected by dc offset or leakage current.

•Smart Ωremoves unexpected dc voltages within the instru-

ment, at the input, or at the circuit being measured, which

will add error to resistance measurements. Press to

switch between the bias voltage (BiAS) display or leakage

current (LEAk) display, calculated based on the bias voltage

and corrected resistance value, on the secondary display.

While performing resistance mea-

surements, press until BiAS is

shown on the secondary display to

enable the Smart Ωfunction.

Smart

Shift

View

Esc

Exit

Dual

U1273A/U1273AX Handheld Digital Multimeter

Performing Measurements and Tests

10 U1273A/U1273AX Quick Start Guide

Continuity tests

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

form continuity tests. Press to switch to the continuity

test function ( is shown on the display).

The beeper will sound as a continuity indication. Press to

switch between normal open ( ) and normal close ( )

contacts.

• Normal open: Circuit is normally open, the beeper will

sound when a short is detected.

• Normal close: Circuit is normally closed, the beeper will

sound when an open is detected.

Shift

View

Esc

Exit

Dual

Smart

(closed)

OFF

(open)

Shift

View

Esc

NOTE

The continuity function detects intermittent shorts and opens

lasting as short as 1 ms. A brief short or open causes the multi-

meter to emit a short beep.

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