Keysight U1240 Series
Handheld Digital Multimeters
Data Sheet
Keysight Technologies, Inc. U1240 Series handheld digital multimeters enable
you to check more with wider measurement ranges. They feature true RMS
readings on their 10,000-count displays. The adjustable backlighting allows you
to complete your jobs even in subdued lighting conditions, or to simply prolong
battery life. Your maintenance tasks are greatly simplified due to the built-in
switch counter, harmonic ratio, dual and differential temperature capabilities,
with just a press of the button. The meters have a high safety rating with CAT III
1000 V and CATIV600 V protection and are certified to CE and CSA standards.
On top of that, the U1240 Series comes with a certificate of calibration and test
report – at no extra cost.
The latest multimeters in this series, the U1241B and U1242B, now come in
vivid orange cases, offering the capabilities and functions you need.
Key features
Check more, fix more
–10,000-count display
–0.09% basic DCV accuracy
–True RMS AC measurement
–Basic functions — ACV,
DCV,
ACI, DCI, resistance, fre-
quency, diode, continuity
tests
–Advanced functions —
Capacitance, temperature,
MINMAX recording
Ease of use
–Adjustable backlighting —
two intensity levels
–Manual data logging
(U1242B only)
–Built-in switch counter, har-
monic ratio (U1242B only),
dual/differential tempera-
ture capabilities (U1242B
only)
Built to last
–Overmold body casing
–CAT III 1000 V and
CAT IV 600 V safety protec-
tion
–Certified to CE and CSA
standards
–Operating temperature:
–10 to 55 °C
Diode Test
Switch Counter
DCV: 0.1m V to 1000 V
ACV: 50m V to 1000 V
Harmonic Ratio
(U1242B only)
Backlight:
Two intensity levels
Resistance:
0.1 Ω to 100 MΩ
ACA: 50 uA to 10 mA
Capacitance:
0.1 nF to 10 mF
Ambient temperature
ACmA: 5 mA to 440 mA
ACA: 0.5 A to 10 A
Frequency: 1 Hz to 200 kHz
MINMAX Recording
T1–T2 Differential
Temperature
(U1242B only)
Temperature:
–40 to 1000 °C
Manual Data Logging
(U1242B only)
Functions and ranges at a glance
3
Electrical Specifications
DC specifications
Function Range Resolution Test current/burden
voltage
Accuracy ± (% of reading + counts of least
U1241B U1242B
Voltage1
1000.0 mV 0.1 mV – 0.09% + 5
10.000 V 0.001 V – 0.09% + 2
100.00 V 0.01 V –
1000.0 V 0.1 V – 0.15% + 5
Current
1000.0 A 0.1 A < 0.06 V (50 Ω) 0.1% + 3
10000 A 1 A < 0.55 V (50 Ω) 0.1% + 3
100.00 mA 0.01 mA < 0.18 V (0.5 Ω) 0.2% + 3
440.0 mA20.1 mA < 0.8 V (0.5 Ω) 0.5% + 3
10.000 A30.001 A < 0.4 V (0.01 Ω) 0.6% + 5
Resistance4
1000.0 Ω50.1 Ω 0.5 mA
0.3% + 3
10.000 kΩ50.001 kΩ 50 A
100.00 kΩ 0.01 kΩ 4.91 A
1000.0 kΩ 0.1 kΩ 447 nA
10.000 MΩ 0.001 MΩ 112 nA 0.8% + 3
100.00 MΩ60.01 MΩ 112 nA 1.5% + 3
Diode test71 V 0.001 V approximately 0.5 mA 0.3% + 2
1. Input impedance: 10 MΩ (nominal).
2. Current can be measured up to 440 mA continuously. An additional 0.2% needs to be added to the specified accuracy if the signal measured is in the
range of 440 mA to 1100 mA for 30 seconds maximum. After measuring a current of > 440 mA, leave the meter to cool down for twice the measur-
ing time used before applying a low current measurement.
3. Current can be measured up to 10 A continuously with a maximum operating temperature of 50 °C. An additional 0.3% needs to be added to the
specified accuracy if the signal measured is in the range of 10 A to 19.999 A for 15 seconds maximum. After measuring a current of > 10 A, leave the
meter to cool down for 60 seconds before applying a low current measurement.
4. The maximum open voltage is < 2.8 V. For instant continuity, the built-in buzzer sounds when resistance is < 10.0 Ω.
5. The accuracy of 1 kΩ and 10 kΩ is specified after Null function, which is used to substrate the test lead resistance and the thermal effect.
6. For the range of 100 MΩ, the R.H. is specified for < 60%. The temperature coefficient will be 0.15 times of specified accuracy as > 50 MΩ.
7. Overload protection: 1000 V RMS for circuits < 0.3 A short circuit current. The built-in buzzer sounds when reading is approximately below 50 mV and
audible single tone for normal forward biased diode or semiconductor junction as 0.3 V ≤ Reading ≤ 0.8 V.
4
AC specifications
Function Range Resolution Test current/burden
voltage
40 to 500 Hz 500 Hz to 1 kHz 1 to 2 kHz
AC voltage8, 12
True RMS
1000.0 mV 0.1 mV –
1% + 5
2% + 5 –
10.000 V 0.001 V –
1% + 5 2% + 5
100.00 V 0.01 V –
1000.0 V 0.1 V – –
AC current9, 12
True RMS
1000.0 A 0.1 A < 0.06 V (50 Ω)
1% + 5 1.5% + 5 –
10000 A 1 A < 0.55 V (50 Ω)
100.00 mA 0.01 mA < 0.18 V (0.5 Ω)
440.0 mA10 0.1 mA < 0.8 V (0.5 Ω)
10.000 A11 0.001 A < 0.4 V (0.01 Ω)
8. Input impedance: 10 MΩ (nominal) in parallel with < 100 pF, with overload protection of 1000 V RMS
9. Crest factor ≤ 3. For non-sinusoidal waveforms with crest factor up to 3, add 2% reading + 2% full scale typical.
10. Current can be measured from 50 mA to 440 mA continuously. An additional 0.2% needs to be added to the specified accuracy if the signal
measured is in the range of 440 mA to 1100 mA for 30 seconds maximum. After measuring a current of > 440 mA, leave the meter to cool down for
twice the measuring time used before application of low current measurement.
11. Current can be measured from 0.5 A up to 10 A continuously with a maximum operating temperature of 50 °C. An additional 0.3% needs to be added
to the specified accuracy if the signal measured is in the range of 10 A to 19.999 A for 15 seconds maximum. After measuring a current of >10 A,
leave the meter to cool down for 60 seconds before applying a low current measurement.
12. AC voltage and AC current specifications are AC coupled. True RMS measurement is valid from 5 % of range to 100 % of range.
Temperature specifications
Thermocouple type Range Resolution Accuracy ± (% of reading + offset
K (for U1241B and U1242B) –40 to 1000 ºC/–48 to 1832 ºF 0.1 °C /0.1 °F 1% + 1 ºC/1% + 1.8 °F
J (for U1242B only) –40 to 1000 ºC/–48 to 1832 ºF 0.1 ºC/0.1 ºF 1% + 1 ºC/1% + 1.8 °F
Capacitance specifications
Range Resolution
1000.0 nF 0.1 nF
1.2% + 410.000 F 0.001 F
100.00 F 0.01 F
1000.0 F 0.1 F 2% + 4
10.000 mF 0.001 mF
Harmonic ratio specifications
Range Frequency Voltage
0.0% to 99.9% 40 to 500 Hz 100 mVAC to 1000 VAC
Electrical Specifications
5
Electrical Specifications
Switch counter definition
Switch condition1, 2 Circuit switch Display3Switch threshold
Low level Normally close Lo < 370 ohms
Intermittent4Close to open Number of switch count Low to high transition
High level Normally open Hi > 430 ohms
Intermittent5Open to close Number of switch count High to low transition
1. Detects intermittent Opens or Closes lasting for at least 250 µsec.
2. Test current of 0.5 mA with maximum open circuit voltage of 2.8 V is used.
3. Maximum count reading: 199.99 M (display “OL” when achieving 2 x 108 and thereafter).
4. Count only low to high transition for initial switch condition of Low.
5. Count only high to low transition for initial switch condition of High.
Frequency specifications
Range Resolution Accuracy Minimum input frequency
100.00 Hz 0.01 Hz
0.03%+3 1 Hz
1000.0 Hz 0.1 Hz
10.000 kHz 0.001 kHz
100.00 kHz 0.01 kHz
1000.0 kHz10.1 kHz
1. Effective frequency measurement of up to 200 kHz; refer to frequency sensitivity table below for details.
Frequency sensitivity during voltage measurement
20 Hz to 50 kHz 50 to 200 kHz
1000.0 mV 0.3 V 0.6 V
10.000 V 0.5 V 1.8 V
100.00 V 5 V 10 V (< 100 kHz)
1000.0 V 50 V 100 V (< 100 kHz)
Frequency sensitivity during current measurement
Input range
20 Hz to 20 kHz
1000.0 A 100 A
10000 A 500 A
100.00 mA 10 mA
440.00 mA 50 mA
10.000 A 1 A
6
Electrical Specifications
Measuring rate
Function Times/second
ACV 7
DCV (V or mV) 7
Ω 14
Diode 14
Capacitance 4 (< 100 F)
DCA (µA, mA, A) 7
ACA (µA, mA, A) 7
Temperature 7 (single)
Frequency 1 (> 10 Hz)
General Specifications
Display Dual display (secondary display is intended for temperature function display only)
consists of 4-digit liquid crystal display (LCD) with maximum reading of 11,000 counts.
Automatic polarity indication.
Power consumption 0.22 VA maximum
Battery type and life Four single standard 1.5 V AAA batteries (Alkaline or Zinc Chloride type); 300 hours
typical
Operating environment − Full accuracy at –10 to 55 °C; and to 80% RH for temperatures up to 30 °C, decreasing
linearly to 50% RH at 55 °C
− 0 – 2000 meters per IEC 61010-1 2nd Edition CAT III, 1000 V / CAT IV, 600 V IEC
61010-1 2nd Edition
Storage compliance –20 to 70 °C
Safety compliance − IEC 61010-1:2001 / EN61010-1:2001
− Canada: CSA C22.2 No. 61010-1:2004
Measurement category CAT III 1000 V / CAT IV 600 V Overvoltage Protection, Pollution Degree 2
EMC compliance − CISPR 11:1990/EN55011:1990
− Canada: ICES-001:2004
− Australia/New Zealand: AS/NZS CISPR11:2004
> 90 dB at DC, 50/60 Hz ± 0.1% (1 kΩ unbalanced)
> 60 dB at 50/60 Hz ± 0.1%
Crest factor < 3.0
0.1 × (specified accuracy) / °C (from –10 to 18 °C or 28 to 55 °C)
Shock and vibration Tested to IEC/EN 60068-2
193.8 mm x 92.2 mm x 58.0 mm
Weight − 450 g with batteries
− 400 g without batteries
Warranty − Three years for main unit
− Three months for standard shipped accessories
7
Ordering Information
Standard shipped accessories
− Four 1.5 V AAA alkaline batteries
− Certificate of Calibration (CoC)
− Test probe leads (4-mm tips)
− Quick Start Guide
− Free test data (Option UK6)
Optional accessories
U1161A
Extended test
lead kit
Includes two test leads (red and black), two test probes, medium-
sized alligator clips and 4-mm banana plugs.
− Test leads: CAT III 1000 V, CAT IV 600 V, 15 A
− Test probes: CAT lll 1000 V, CAT lV 600 V, 15 A
− Medium-sized alligator clips: CAT III 1000 V, CAT IV 600 V, 15 A
− 4-mm banana plugs: CAT II 600 V, 10 A
U1162A
Alligator clips
− One pair of insulated alligator clips (red and black).
Recommended for use with Keysight standard test leads.
− Rated CAT III 1000 V, CAT IV 600 V, 15 A
U1163A
SMT grabbers
− One pair of SMT grabbers (red and black). Recommended for use
with Keysight standard test leads.
− Rated CAT II 300 V, 3 A
U1164A
Fine-tip test
probes
− One pair of fine-tip test probes (red and black). Recommended for
use with Keysight standard test leads.
− Rated CAT II 300 V, 3 A
U1168A
Standard test
lead kit
Includes two test leads (red and black), 19-mm and 4-mm test
probes, alligator clips, fine-tip test probes, SMT grabbers and mini
grabber (black).
− Test leads: CAT III 1000 V, CAT IV 600 V, 15 A
− Test probes (19-mm tip): CAT II 1000 V, 15 A
− Test probes (4-mm tip): CAT III 1000 V, CAT IV 600 V, 15 A
(highly recommended for CAT IV environment)
− Alligator clips: CAT III 1000 V, CAT IV 600 V, 15 A
− Fine-tip test probes: CAT II 300 V, 3 A
− SMT grabber: CAT II 300 V, 3 A
− Mini grabber: CAT II 300 V, 3 A
U1169A
Test probe leads
Includes two test leads (red and black), and a pair each of 19-mm
and 4-mm test probes.
− Test leads: CAT III 1000 V, CAT IV 600 V, 15 A
− Test probes (19-mm tip): CAT II 1000 V, 15 A
− Test probes (4-mm tip): CAT III 1000 V, CAT IV 600 V, 15 A
(highly recommended for CAT IV environment)
U1583B
AC current clamp
− Dual range: 40 A and 400 A
− Rated CAT III 600 V
− BNC-to-banana-plug adapter provided for use with DMMs
U1241B U1242B
8
Optional accessories
U1180A
Thermocouple
adapter+lead kit,
J and K types
Includes thermocouple adapter, thermocouple bead J-type and
thermocouple bead K-type.
− T/C adapter J/K-type
− T/C bead J-type: –20 °C to 200 °C
− T/C bead K-type: –20 °C to 200 °C
U1181A
Immersion
temperature probe
− Type-K T/C for use in oil and other liquids
− Measurement range: –50 °C to 700 ºC
− Includes adapter U1184A for connection to DMM
U1182A
Industrial surface
temperature probe
− Type-K T/C for use on still surfaces
− Measurement range: –50 ºC to 400 ºC
− Includes adapter U1184A for connection to DMM
U1183A
Air temperature
probe
− Type-K T/C for use in air and non-caustic gas
− Measurement range: –50 ºC to 800 ºC
− Includes adapter U1184A for connection to DMM
U1184A
Temperature probe
adapter
− Mini-connector-to-banana-plug adapter for use with DMM
U1185A
J-type thermocouple
and adapter
− T/C adapter J/K-type
− T/C bead J-type: –20 °C to 200 °C
U1186A
K-type
thermocouple and
adapter
− T/C adapter J/K-type
− T/C bead J-type: –20 °C to 200 °C
Carrying case
U1172A
Transit case
(aluminium-clad)
The robust casing to transport your DMM and accessories
− Aluminum-clad, black panel construction
− Dimension: 18 inches (H) x 13 inches (W) x 6 inches (D)
− Weight: 4 kg
U1174A
Soft carrying case
The convenient way to carry your DMM and essential accessories
− Dimension: 9 inches (H) x 5 inches (W) x 3 inches (D)
Hanging kit
U1171A
Magnetic hanging
kit
For fastening the DMM to a steel surface so both hands are free
U1179A IR
Connectivity Bracke
Connect with U1177A IR-to-Bluetooth adapter or U1173A IR-USB
cable
Ordering Information
myKeysight
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AdvancedTCA® Extensions for Instrumentation and Test (AXIe) is an
open standard that extends the AdvancedTCA for general purpose and
semiconductor test. Keysight is a founding member of the AXIe consortium.
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Web inside your test systems. Keysight is a founding member of the LXI
consortium.
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PCI eXtensions for Instrumentation (PXI) modular instrumentation delivers a
rugged, PC-based high-performance measurement and automation system.
Three-Year Warranty
www.keysight.com/find/ThreeYearWarranty
Keysight’s commitment to superior product quality and lower total cost
of ownership. The only test and measurement company with three-year
warranty standard on all instruments, worldwide.
Keysight Assurance Plans
www.keysight.com/find/AssurancePlans
Up to five years of protection and no budgetary surprises to ensure your
instruments are operating to specification so you can rely on accurate
measurements.
www.keysight.com/quality
Keysight Electronic Measurement Group
DEKRA Certified ISO 9001:2008
Quality Management System
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Get the best of both worlds: Keysight’s measurement expertise and product
breadth, combined with channel partner convenience.
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For more information on Keysight
Technologies’ products, applications or
services, please contact your local Keysight
office. The complete list is available at:
www.keysight.com/find/contactus
Americas
Canada (877) 894 4414
Brazil 55 11 3351 7010
Mexico 001 800 254 2440
United States (800) 829 4444
Australia 1 800 629 485
China 800 810 0189
Hong Kong 800 938 693
India 1 800 112 929
Japan 0120 (421) 345
Korea 080 769 0800
Malaysia 1 800 888 848
Singapore 1 800 375 8100
Taiwan 0800 047 866
Other AP Countries (65) 6375 8100
Europe & Middle East
Austria 0800 001122
Belgium 0800 58580
Finland 0800 523252
France 0805 980333
Germany 0800 6270999
Ireland 1800 832700
Israel 1 809 343051
Italy 800 599100
Luxembourg +32 800 58580
Netherlands 0800 0233200
Russia 8800 5009286
Spain 0800 000154
Sweden 0200 882255
Switzerland 0800 805353
Opt. 1 (DE)
Opt. 2 (FR)
Opt. 3 (IT)
United Kingdom 0800 0260637
For other unlisted countries:
www.keysight.com/find/contactus
(BP-06-16-14)
09 | Keysight | U1240 Series Handheld Digital Multimeters - Data Sheet
This information is subject to change without notice.
© Keysight Technologies, 2013 - 2014
Published in USA, August 3, 2014
5989-7040EN
www.keysight.com
