Keysight U1241b Handheld Digital Multimeter User Guide

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 and EMC Information
The U1241B and U1242B is safety-certified in compliance with IEC/EN 61010-1, IEC/EN
61010-2-030, IEC/EN
61010-2-033, CAN/CSA-C22.2 No.
61010-1, CAN/CSA-C22.2 No.
61010-030, CAN/CSA-C22.2 No.
61010-033, UL Std. No. 61010-1,
UL Std. No. 61010-030 and UL Std.
No. 61010-033.
EMC is designed in compliance with IEC 61326-1/EN 61326-1, CISPR11/EN55011 Group 1 Class A, ICES/NMB-001, and AS/NZS CISPR 11.

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)
CAT III 1000 V	Category III 1000 V overvoltage protection
CAT IV 600 V	Category IV 600 V overvoltage protection

For further safety information details, refer to the
Keysight U1241B and U1242B Handheld Digital Multimeter
User’s and Service Guide.

Keysight U1241B and U1242B Handheld Digital Multimeter Quick Start Guide

The following items are included with your multimeter:
✔ Silicone test leads and 4 mm probes
✔ 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.

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

Tilt Stand

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)
5	Primary 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
9	T1, T2 and T1 – T2 temperature measurements scan (for U1242B)	20 21	Primary measurement units Measurement range
10	Data hold	22	Low battery indicator
11	T1, T2* and T1 – T2* temperature measurements	23	Auto power off indicator
*T2	*T2 temperature measurement and delta (T1 – T2) are only available for U1242B.

Functions and Features

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 Harmonic ratio (for U1242B)	50 mV to 1000 V 0.0% to 99.9%
	Diode measurement		Switch counter measurement
	Resistance measurement	0.1 Ω to 100 MΩ	Audible continuity measurement
	Capacitance measurement	0.1 μF to  10 mF
	DCµA	0.1 μA to 10 mA	ACµA measurement	50 μA to 10 mA
	DCmA	0.01 mA to 440mA	ACmA measurement mA% scale	5 mA to 440 mA
	DCA	0.001 A to 10A	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.

This information is subject to change
without notice. Always refer to the
Keysight website for the latest revision.
© Keysight Technologies 2009-2021
Edition 9, January 2021
Printed in Malaysia

U1241-90055
www.keysight.com

References

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