Keysight u1273a User manual

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
Z 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
Z LOW
Smart
Auto
or

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.
DC
1
2
3
4

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