Keysight U1242B User manual

Keysight U1241B and
U1242B Handheld
Digital Multimeter
Quick Start
Guide

Contacting Keysight
www.keysight.com/find/assist
(worldwide contact information for
repair and service)
Safety Information
The U1241B and U1242B is
safety-certified in compliance with
IEC/EN 61010-1, IEC/EN
61010-2-033, CAN/CSA-C22.2 No.
61010-1, CAN/CSA-C22.2 No.
61010-033, ANSI/UL 61010-1, and
ANSI/UL 61010-033. Use with
standard or compatible test probes.
EMC Information
The U1241B and U1242B is
EMC-certified in compliance with
IEC 61326-1/EN 61326-1, ICES/
NMB-001, and AS/NZS CISPR 11.
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 the instrument
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 U1241B and U1242B Quick Start Guide
For further safety information details, refer to the
Keysight U1241B and U1242B Handheld Digital Multimeter
User’s and Service Guide.

Keysight U1241B and U1242B Quick Start Guide 3
Keysight U1241B and U1242B Handheld
Digital Multimeter Quick Start Guide
The following items are included with your
multimeter:
✔Silicone test leads and 4mm probes
✔Printed Quick Start Guide
✔Four 1.5 V AAA alkaline batteries
✔Certificate of Calibration
If anything is missing or damaged, please contact
the nearest Keysight Sales Office.
For more detailed information, please refer to the
Keysight U1241B and U1242B Handheld Digital
Multimeter User’s and Service Guide on Keysight
website (www.keysight.com/find/handheld-tools).
WARNING
Ensure the terminal connections are correct for that
particular measurement selection before starting any
measurement. To avoid damage to the device, do not
exceed the input limit.

4 Keysight U1241B and U1242B Quick Start Guide
Annunciator
Keypad
Rotary Switch
Input terminal
U1241B U1242B
Measurement Functions Input Terminal Overload Protection
Voltage
COM
1000 V R.M.S
Diode 1000 V R.M.S
< 0.3 A short circuit
current
Resistance
Capacitance
Current (μA and mA) µA.mA COM 440 mA/1000 V
30 kA/fast-acting fuse
Current (A) A COM 11 A/1000 V 30 kA/
fast-acting fuse
Temperature +T1 –T1 1000 V R.M.S
Temperature
(for U1242B)
+T2 –T2 440 mA/1000 V
30 kA/fast-acting fuse

Keysight U1241B and U1242B Quick Start Guide 5
Annunciator Display
No. Descriptions No. Descriptions
1 21-segment analog bar graph
display
12 MINMAX Recording mode
2 Capacitor discharge indicator 13 Harmonic Ratio mode
(for U1242B)
3 Cold junction of ambient
temperature
14 Data logging mode
(for U1242B)
4 Audible continuity for
resistance and diode function
15 Data logging viewing mode
(for U1242B)
5Primary display 16 Auto or manual data logging
mode and datalog viewing
mode
6 AC or DC measurement mode 17 Secondary display
(temperature display)
7 Auto range 18 Null math function
8 Diode / Audible continuity 19 Thermocouple type for
temperature measurement
1
2
3
4
6
7
8
9
10
11 13
14
15 17
18
19
20
21
22
23
5
12 16

6 Keysight U1241B and U1242B Quick Start Guide
Functions and Features
9 T1, T2 and T1 – T2 temperature
measurements scan
(for U1242B)
20 Primary measurement units
21 Measurement range
10 Data hold 22 Low battery indicator
11 T1, T2* and T1 – T2*
temperature measurements
23 Auto power off indicator
*T2 temperature measurement and delta (T1 – T2) are only available for U1242B.
Function First level
functions
Range Second level functions
(press )
Range
OFF Turn off the
meter
DCV
measurement
0.1 mV to
1000 V
ACV measurement 50 mV
to
1000 V
Harmonic ratio
(for U1242B)
0.0% to
99.9%
Diode
measurement
Switch counter
measurement
Resistance
measurement
0.1 Ωto
100 MΩ
Audible continuity
measurement
Keypad
Rotary Switch

Keysight U1241B and U1242B Quick Start Guide 7
Capacitance
measurement
0.1 nF to
10 mF
DCµA 0.1 μA to
10 mA
ACµA measurement 50 μA
to
10 mA
DCmA 0.01 mA
to
440 mA
ACmA measurement 5 mA to
440 mA
mA% scale
DCA 0.001 A
to 10 A
ACA measurement 0.5 A to
10 A
T1 T1 temperature –40 °C to
1000 °C
T2 and T1–T2
temperature
measurements
(for U1242B)
–40 °C
to
1000 °C
Action Steps
Turns ON backlight Press .
Checks battery capacity Press and hold for >1 s.
Freezes the measured value Press .
Starts MIN/MAX/AVG recording Press and hold for >1 s.
Offsets the measured value Press .
Scan the measured temperature
(for U1242B only) Press and hold for > 1 s.
Changes the measuring range Press .
Turns on auto range Press and hold for > 1 s.
Measures frequency for AC signal Press .
Starts manual data logging Press and hold for > 1 s.

8 Keysight U1241B and U1242B Quick Start Guide
Tilt Stand
Tilt stand at 60 º Tilt stand at 30 º

This information is subject to change
without notice. Always refer to the
Keysight website for the latest revision.
© Keysight Technologies 2009 – 2016
Edition 6, March 1, 2016
Printed in Malaysia
*U1241-90055*
U1241-90055
www.keysight.com