Keysight U1281A Manual de usuario

Keysight U1281A/

U1282A Handheld

Digital Multimeter

Quick Start Guide

2 Keysight U1281A/U1282A Quick Start Guide

Safety Notices

CAUTION

A CAUTION notice denotes a

hazard. It calls attention to an

operating procedure, practice, or

the like that, if not correctly

performed or adhered to, could

result in damage to the product

or loss of important data. Do not

proceed beyond a CAUTION

notice until the indicated

conditions are fully understood

and met.

WARNING

A WARNING notice denotes a

hazard. It calls attention to an

operating procedure, practice, or

the like that, if not correctly

performed or adhered to, could

result in personal injury or

death. Do not proceed beyond a

WARNING notice until the

indicated conditions are fully

understood and met.

EMC Information

The U1281A/U1282A is

EMC-certified in compliance with

IEC 61326-1/EN 61326-1, ICES/

NMB-001, and AS/NZS CISPR 11.

Safety Information

The U1281A/U1282A is

safety-certified in compliance with

IEC/EN 61010-1, IEC/EN

61010-2-033, CAN/CSA-C22.2 No.

61010-1-12, CAN/CSA-C22.2 No.

61010-033-12, ANSI/UL

61010-1-12, and ANSI/UL

61010-033-12. Use with standard

or compatible test probes.

Safety symbols

Direct current (DC)

Alternating current (AC)

Caution, risk of

electric shock

Caution, risk of danger

(refer to this manual for

specific Warning or

Caution information)

Earth (ground) terminal

Equipment protected

throughout by double

insulation or reinforced

insulation

Category III 1000 V

overvoltage protection

Category IV 600 V

overvoltage protection

CAT III

1000 V

CAT IV

600 V

2 Keysight U1281A/U1282A Quick Start Guide

For further safety information details, refer to the

Keysight U1281A/U1282A Handheld Digital Multimeter

User’s Guide.

Keysight U1281A/U1282A Quick Start Guide 3

Standard Shipped Items

Verify that you have received the following items

with the shipment of your U1281A/U1282A

multimeters:

✔Test leads (red and black)

✔IR-to-USB cable

✔Four 1.5 V AA batteries

✔Printed copy of the U1281A/U1282A

Quick Start Guide (this document)

✔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 U1281A and U1282A Handheld

Digital Multimeters.

– The model U1282A appears in all illustrations.

– All related documents and software are

available for download at

www.keysight.com/find/hhTechLib.

NOTE

Your multimeter is capable of receiving remote

commands and performing remote data logging. To

use these features, you will need either an

IR-to-USB cable (included in the shipment) or an

IR-to-Bluetooth®adapter (U1117A, purchased

separately), and the Keysight Handheld Meter

Logger Software (downloadable from

www.keysight.com/find/hhmeterlogger).

For more information on the remote commands,

refer to the U1281A/U1282A Programming Guide.

4 Keysight U1281A/U1282A Quick Start Guide

Install or Change the Batteries

The multimeter is powered by four 1.5 V AA

batteries (included in the shipment).

Before installing or changing the batteries, pull from

a corner and stretch the orange rubber holster to

remove it.

Turn On the Multimeter

Turn the rotary switch from the position to any

other position to begin making measurements.

mACOM

U1282A

True

RMSMul

meter

PeakV

sense

Dual

Auto

FUSED

440mACATI

1000V

600V

CAT

MAX

10AMAX

FUSED

OUT

MHz

RMT

U1282A

True

RMSMul

meter

U1282A

RMSMul

time

Vsense

Peak

ense

Dual

Auto

OUT

MHz

COM

FUSED

440mACATII

I1000V

600V

MAX

10A

MAX

FUSED

OUT

mACOM

rue

RMS

Mul

timeter

PeakVsense

Dual

Auto

FUSED

440mACAT

1000V

600V

CATIV

MAX

10AMAX

FUSED

OUT

MHz

rue

RMS

Mul

timete

1 2

4 5

7 8

OUT

MHz

Keysight U1281A/U1282A Quick Start Guide 5

The Multimeter at a Glance

mA COM

U1282A True RMS Multimeter

Vsense

Peak Vsense

Dual

Auto

FUSED

440mA CAT III 1000V

600VCAT IV

MAX

10A MAX

FUSED

OUT

MHz

RMT

Vsense red LED indicator

Display screen

Keypad

Rotary switch

Input terminals

IR communication port

Test lead/probe holders

Battery access

(under the orange rubber holster)

Tilt stand

Fuse access

(under the orange rubber holster)

6 Keysight U1281A/U1282A Quick Start Guide

Using the Rotary Switch

Legend Measurement function

Model

U1281A U1282A

AC V/AC V with Low Pass Filter (LPF)[a] ✔✔

AC mV/AC mV with LPF[a] ✔✔

DC/AC/AC+DC V ✔✔

DC/AC/AC+DC mV ✔✔

Resistance/Continuity ✔✔

Diode/Frequency counter[a] ✔✔

Capacitance/Temperature ✔✔

DC μA/mA/AC μA/mA/AC+DC μA/mA ✔✔

DC A/AC A/AC+DC A ✔✔

Square wave mode[a] —✔

[a] For U1282A only.

MHz

OUT

WARNING

Remove the test leads from the measuring source

or target before changing the rotary switch

position.

Refer to the U1281A/U1282A User’s Guide for a

complete list and description of all rotary switch

labels.

Keysight U1281A/U1282A Quick Start Guide 7

Using the Keypad

Legend Key response when pressed for:

Less than 1 second More than 1 second

– Starts the Max/Min/Avg

recording

– Switches between the

Max/Min/Avg recording

modes

– Stops the Max/Min/Avg

recording

– Starts and stops the

Peak recording

Sets the Null/Relative mode

Enables and disables the

non-contact voltage

detection – Vsense[a]

Sets a manual range Enables autoranging

Enables the frequency test

mode for current or voltage

measurements

Starts and stops data

logging

Turns the backlight on/off

Activates and deactivates

the dual display mode (if

supported by the

measurement)

Switches between the

regular and shifted (icons

printed in orange) functions

Enters the Log Review

– Freezes the present

reading in the display

(TrigHold mode)

– Automatically freezes the

present reading when

certain conditions are met

(AutoHold mode; when

enabled from the

multimeter’s Setup mode)

– Exits the AutoHold mode

– Stores a record of the

measured signal and

exports it via the

multimeter’s optical

communication port

Exits the TrigHold mode

[a] For the U1282A only

MaxMin

Vsense

Range

Save

Esc

Shift

Hold

8 Keysight U1281A/U1282A Quick Start Guide

Using the Input Terminals

WARNING

To avoid damaging this device, do not exceed the

input limit.

Rotary

position Input terminals Overload protection

1000 Vrms

1000 Vrms for short

circuit <0.3 A

440 mA/1000 V,

fast-acting fuse

11 A/1000 V,

fast-acting fuse

This input terminal is for use with the Remote Switch Probe (purchased

separately). The button on the probe emulates the button on the

multimeter by default.

COM

MHz

COM

OUT

RMT

Hold

Keysight U1281A/U1282A Quick Start Guide 9

Safety Alerts and Warnings

Hazardous voltage indication

The multimeter will display the hazardous voltage

( ) symbol as an early precaution when the

measured voltage is:

This symbol will also be displayed when the input

signal exceeds the limitation of measuring circuit as

frequency dependence.

Hazardous current indication

The multimeter will display the hazardous current

( ) symbol as an early precaution when the

measured current has reached the maximum fuse

rating as follows:

Measurement DC AC

V (mV) ≥+30 V or +OL ≤–30 V or –OL ≥30 V or OL

Measurement DC AC

A≥+11 A or +OL ≤–11 A or –OL ≥11 A or OL

μA/mA ≥440 mA or +OL ≤–440 mA or –OL ≥440 mA or OL

CAUTION

If your measuring current is > 10 A ~ 19.999 A, you

will need to lower the current within a 30-second

time limitation to avoid blowing the multimeter’s

fuse.

10 Keysight U1281A/U1282A Quick Start Guide

Input Warning

The multimeter emits a continuous beep and the

red LED indicator lights up when:

– the test lead is inserted into the or

input terminal but the rotary switch is not set to

the correct current position. The secondary

display will show or until the

test lead is removed. The beeping will stop

automatically after 5 seconds even if the test

lead is not removed.

– the rotary switch is set to the current

measurement position but no lead is inserted

into its respective input terminal. The secondary

display will show and the warning alert

will stop after approximately 3 seconds.

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