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Agilent
U1231A/U1232A/U1233A
Handheld Multimeter
Quick Start Guide
Verify that you received the following items in the shipment of
your multimeter:
One pair of red and black test leads
Four 1.5 V AAA alkaline battery
Printed copy of the U1231A/U1232A/U1233A
Quick Start Guide
If any item is missing or damaged, keep the shipping materials
and contact the nearest Agilent Sales Office.
NO TE
The descriptions and instructions in this guide apply to the
U1231A, U1232A, and U1233A handheld multimeters.
The model U1233A appears in all illustrations.
All related documents and software are available for download
at www.agilent.com/find/hhTechLib.
Agilent Technologies
U1231A/U1232A/U1233A Handheld Multimeter
Install the Batteries
Install the Batteries
Your multimeter is powered by four 1.5 V AAA alkaline batter-
ies (included with the shipment).
1 Turn the multimeter OFF and remove the test
leads from the terminals.
2 Loosen the screw on the battery cover with a
suitable Phillips screwdriver.
3 Remove the battery cover and observe the
polarity markings.
4 Insert the batteries and replace the battery
cover and screw.
Turn On the Multimeter
To power ON your multimeter,
turn the rotary switch to any
other position.
Controlling the Multimeter Remotely
Your multimeter is capable of
To PC (host)
remote data logging.
To use this feature, you will
need a PC running a Windows
operating system, an IR-USB
cable (U1173A, purchased sepa-
rately), and the Agilent GUI Data
Logger Software.
The Agilent GUI Data Logger software is downloadable for free
from www.agilent.com/find/hhTechLib.
2 U1231A/U1232A/U1233A Quick Start Guide
U1231A/U1232A/U1233A Handheld Multimeter
The Multimeter at a Glance
The Multimeter at a Glance
Vsense indicator
(U1233A only)
Display screen
Keypad
Rotary switch
Input terminals
LED flashlight
Test lead/probe holders
IR communication port
Battery cover
Tilt stand
U1231A/U1232A/U1233A Quick Start Guide 3
U1231A/U1232A/U1233A Handheld Multimeter
Understanding the Rotary Switch
Understanding the Rotary Switch
NO TE
Some rotary switch positions have a shifted function printed in
orange. Press to switch between the shifted and regular
Esc Shift
function.
Legend Functions shown in the primary display
Low input impedance -- VZLOW Auto (AC or DC)/
VZLOW DC V/VZLOW AC V for eliminating ghost voltages
Hz AC V/Frequency
DC V
Resistance/Short continuity/Open continuity[1]
Diode
Capacitance/Temperature (U1233A only)
AUX
Capacitance/Auxiliary Temperature (U1232A only)
Capacitance (U1231A only)
Hz DC or AC A/Frequency
Hz DC or AC A/Frequency
Hz
AUX Clamp-on AC or DC A/Frequency (U1231A only)
AUX
Auxiliary Temperature (U1231A only)
[1] Open continuity option must be enabled through the multimeter's Setup
( > ). Open continuity is disabled by default.
WA RN ING
Remove the test leads from the measuring source or
target before changing the rotary switch position.
Refer to the U1231A/U1232A/U1233A User's Guide for a
complete list and description of all rotary switch labels for
each separate multimeter model.
4 U1231A/U1232A/U1233A Quick Start Guide
U1231A/U1232A/U1233A Handheld Multimeter
Understanding the Keypad
Understanding the Keypad
Key response when pressed for:
Legend
Less than 1 second More than 1 second
Enters the Hold-Log Recall
Null
Recall Sets the null/relative mode
menu
Max
Min Starts the MaxMin recording Stops the MaxMin recording
Range
Auto
Sets a manual range Enables autoranging
Freezes and stores the present Automatically freezes the pres-
Tri g Hold
Auto Log
reading in the ent reading
display once the reading is stable
Turns the LCD backlight on or Turns the LED flashlight on or
off. off.
Switches between the regular U1233A only: Enables the
Esc Shift and shifted (icons printed in non-contact voltage detector
orange) functions (Vsense).
Understanding the Input Terminals
Rotary position for
Input terminals Overload protection
U1232A and U1233A
Hz 600 Vrms
600 Vrms for
AUX short circuit <0.3 A
Hz
11 A/1000 V,
Hz
fast-acting fuse
U1231A/U1232A/U1233A Quick Start Guide 5
U1231A/U1232A/U1233A Handheld Multimeter
Understanding the Input Terminals
Non-contact voltage detector (Vsense)
WA RN ING
Voltage could still be present even if there is no alert
indication. Do not rely on the Vsense detector with
shielded wire. Never touch live voltage or conductor
without the necessary insulation protection.
The Vsense detector may be affected by differences in
socket design, insulation thickness, and insulation type.
2 AC
Voltage source
3
>1s
1
Esc Shift
Range
NO TE
Press to change the Vsense detector's sensitivity from
Auto
Hi.SE (high sensitivity) to Lo.SE (low sensitivity).
6 U1231A/U1232A/U1233A Quick Start Guide
U1231A/U1232A/U1233A Handheld Multimeter
Performing Measurements
Performing Measurements
AC voltage measurements
4
3 Voltage source
AC
2
Hz
1
DC voltage measurement
3 Voltage source
DC
2
U1231A/U1232A/U1233A Quick Start Guide 7
U1231A/U1232A/U1233A Handheld Multimeter
Performing Measurements
Resistance measurement
4
3 Resistor
2
1
Continuity test
3
OFF
(open)
Esc Shift
2
ON
(closed )
Press again to switch
Esc Shift
between testing for shorted ( ) or
open ( ) contacts.
8 U1231A/U1232A/U1233A Quick Start Guide
U1231A/U1232A/U1233A Handheld Multimeter
Performing Measurements
Forward bias diode test
4
3 Forward bias diode
2
1
Reverse bias diode test
3 Reverse bias diode
4
U1231A/U1232A/U1233A Quick Start Guide 9
U1231A/U1232A/U1233A Handheld Multimeter
Performing Measurements
Capacitance measurement
CAU TI O N
To avoid possible damage to the multimeter or to the equip-
ment under test, disconnect circuit power and discharge all
high-voltage capacitors before measuring capacitance. Use
the DC V function to confirm that the capacitor is fully dis-
charged.
4
3 Capacitance
2
1
NO TE
is shown on the bottom left of the display when the capaci-
tor is charging, and is shown when the capacitor is dis-
charging.
10 U1231A/U1232A/U1233A Quick Start Guide
U1231A/U1232A/U1233A Handheld Multimeter
Performing Measurements
Temperature measurement
WA RN ING
Do not connect the thermocouple to electrically live
circuits. Doing so will potentially cause fire or electric
shock.
4
3
Esc Shift
Heat source
2
1 K-type thermocouple probe
NO TE