Keysight u1273a User manual

Keysight U1273A/
U1273AX Handheld
Digital Multimeter
Quick Start
Guide

2 Keysight U1273A/U1273AX Quick Start Guide
Contacting Keysight
www.keysight.com/find/assist
(worldwide contact information for
repair and service)
Safety and EMC Information
This meter is safety-certified in
compliance with EN/IEC
61010-1:2001, ANSI/UL
61010-1:2004, and CAN/
CSA-C22.2 No. 61010-1-04 for
CAT III 1000 V/CAT IV 600 V
pollution degree 2 environment.
EMC is designed in compliance
with IEC 61326-1:2005/EN
61326-1:2006. Use with standard
or compatible test probes.
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.
Safety symbols
Earth (ground) terminal
Equipment protected
throughout by double
insulation or reinforced
insulation
Caution, risk of electric
shock
Caution, risk of danger
(refer to this manual for
specific Warning or Caution
information)
Category III 1000 V
overvoltage protection
Category IV 600 V
overvoltage protection
CAT III
1000 V
CAT IV
600 V
2 Keysight U1273A/U1273AX Quick Start Guide
For further safety information details, refer to the
Keysight U1273A/U1273AX Handheld Digital Multimeter User’s Guide.

Keysight U1273A/U1273AX Quick Start Guide 3
Keysight U1273A/U1273AX Quick Start Guide 3
Table of Contents
Install the Batteries . . . . . . . . . . . . . . . . . . . . . . 6
Turn On the Multimeter . . . . . . . . . . . . . . . . . . . 6
The Multimeter at a Glance . . . . . . . . . . . . . . . 8
Understanding the Rotary Switch . . . . . . . . . . . 9
Understanding the Keypad . . . . . . . . . . . . . . . 10
Understanding the Input Terminals . . . . . . . . 11
Performing Measurements and Tests . . . . . . . 12
Voltage measurements . . . . . . . . . . . . . . . . . . . . . .12
Resistance measurements . . . . . . . . . . . . . . . . . . .15
Continuity tests . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Diode tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Capacitance measurements . . . . . . . . . . . . . . . . . .19
Temperature measurements . . . . . . . . . . . . . . . . . .20
Current measurements . . . . . . . . . . . . . . . . . . . . . .21
Check the Fuse . . . . . . . . . . . . . . . . . . . . . . . . 22

4 Keysight U1273A/U1273AX Quick Start Guide
4 Keysight U1273A/U1273AX Quick Start Guide
THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.

Keysight U1273A/U1273AX Quick Start Guide 5
Keysight U1273A/U1273AX Quick Start Guide 5
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.

6 Keysight U1273A/U1273AX Quick Start Guide
6 Keysight 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.
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 (downloadable from
www.keysight.com/find/hhTechLib).

Keysight U1273A/U1273AX Quick Start Guide 7
Keysight U1273A/U1273AX Quick Start Guide 7
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.

8 Keysight U1273A/U1273AX Quick Start Guide
8 Keysight U1273A/U1273AX Quick Start Guide
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)

Keysight U1273A/U1273AX Quick Start Guide 9
Keysight U1273A/U1273AX Quick Start Guide 9
Understanding the Rotary Switch
NOTE
Press to switch between the primary and
shifted functions 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
Z LOW
Smart
Auto

10 Keysight U1273A/U1273AX Quick Start Guide
10 Keysight U1273A/U1273AX Quick Start Guide
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 available
dual-combination displays.
Exits the Hold, Null, MaxMin,
Peak, frequency test, and dual
display modes.
Increases the OLED brightness
incrementally when LOW,
MEDIUM, or HIGH setting is
selected.
Enters and exits the
multimeter’s Setup menu.
Switches between frequency,
pulse width, and duty cycle
measurements.
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