Agilent U1250 Series Handheld
Digital Multimeters
Data Sheet
Introducing the U1250 Series: Handheld Multimeters That Equip You from the Start
Key features
Superior contrast from organic LED
2
1
2
temperature
2
(OLED) display
50,000-count dual display
Up to 0.025% basic DCV accuracy
True-RMS AC and AC+DC
measurements
K-type and J-type
measurements
Manual and automated (interval)
data logging; internally to DMM and
externally to PC
CAT III 1000 V safety protection
Built-in 20-MHz frequency counter
Built-in programmable square-wave
generator
The Agilent U1250 Series handheld digital
Find problems quickly
multimeters (DMMs) exceed your expectations
by delivering powerful features and
performance that meet your toughest
requirements and applications.
Troubleshooting can be tricky, especially when
you’re dealing with elusive problems. With the
U1250 Series’data logging capability, you can
ensure that every reading gets recorded
Do more with just one instrument
manually or at intervals you specify. Better yet:
you can have virtually unlimited data logging
The basic model, U1251A, expands your
capabilities beyond typical DMM
measurements to include data logging. The
saves when you connect any of the U1250
Series DMM to a PC with the optional IR-to-
USB cable.
U1252A starts with the same foundation, and
then adds a 20-MHz frequency counter and
programmable square-wave generator — so
you’d be able to perform more tests
conveniently with one tool. What’s more: both
models come bundled with a complete set of
In addition, the U1250 Series lets you achieve
greater confi dence in your measurements with
accurate true-RMS AC measurements, low
DCV error rate of up to 0.025% and high-
resolution display of 50,000 counts.
accessories to equip you right from the start
at no extra cost.
Offering the same functionality as the U1252A,
the U1253A is the world’s fi rst OLED handheld
2
DMM. You won’t have to squint to be sure
you’re reading it right: On the go or on the
bench, you’ll get crystal-clear viewing indoors,
even in dark, off-angle situations.
Uncompromising ruggedness and
safety
The U1250 Series DMMs are housed in robust
overmold enclosures, rated at CAT III 1000 V
and operate over a wide temperature range of
–20 °C to +55 °C. Built tough and certifi ed to
stringent industrial standards, the U1250 DMM
is what you need to face the demands of
everyday tasks.
[1] U1253A model
[2] U1252A/3A models
2
OLED display with approximately 160° viewing angle, and high contrast ratio of 2000:1
for crystal-clear viewing
1
Large numerical display that’s toggleable
to dual display mode, both at 50,000count high resolution
SHIFT key and one-stop
function keys for easy
access
Broad range of
measurement
functions, including
temperature and
capacitance
Built-in battery
charging for optimum
capacity
20 MHz frequency
2
counter
Data logging to internal
or external memory
Programmable square-wave
generator for stimulation of
digital circuits
2
CAT III 1000 V overvoltage
protection for assurance
of your safety while you
go about your tasks
[1] U1253A only
[2] U1252A/3A only
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DC SPECIFICATIONS
FUNCTION RANGE RESOLUTION TEST CURRENT/
BURDEN VOLTAGE
50.000 mV 0.001 mV - 0.05 + 50
500.00 mV 0.01 mV -
1000.0 mV 0.1 mV -
(1)
VOLTAGE
5.0000 V 0.0001 V -
50.000 V 0.001 V -
500.00 V 0.01 V -
1000.0 V 0.1 V -
RESISTANCE
CURRENT
[3]
500.00 W
5.0000 kW
[3]
0.01 W
0.0001 kW
50.000 kW 0.001 kW
500.00 kW 0.01 kW
5.0000 MW 0.0001 MW
[4]
50.000 MW
500.00 MW
500.00 nS
[5]
0.001 MW
[4]
0.01 MW
0.01 nS 187 nA 1 + 20 1 + 10
500.00 µA 0.01 µA
5000.0 µA 0.1 µA
50.000 mA 0.001 mA
440.00 mA 0.01 mA
5.0000 A 0.0001 A
10.000 A
[7]
0.001 A
1.04 mA 0.08 +10 0.05 + 10
416 µA
41.2 µA
4.12 µA
375 nA
187 nA
187 nA
0.06 V (100 W)
0.6 V (100 W)
0.09 V (1 W)
0.9 V (1 W)
0.2 V (0.01 W)
0.4 V (0.01 W)
DIODE TEST - 0.1 mV 1.04 mA 0.05 + 5
ACCURACY ± (% of reading + No. of Least Signifi cant Digit)
U1251A U1252A/3A
[2]
0.03 + 5
0.08 + 5 0.05 + 5
0.2 + 5 0.15 +5
1 + 10 1 + 5
N/A
0.1 + 5
0.2 + 5
[6]
[6]
3+10 < 200 MW / 8+10 > 200 MW
0.3 + 10
0.05 + 50
0.025 + 5
0.03 + 5
0.05 + 5
0.15 + 5
0.3 + 10
0.3 + 5
[2]
[6]
[6]
U1251A/U1252A TEMPERATURE SPECIFICATIONS
THERMOCOUPLE
TYPE
K –200 ~ 1372 ºC –328 ~ 2502 ºF 0.1 ºC/0.1 ºF 0.3% + 3 ºC 0.3% + 6 ºF
J
(for U1252A)
–210 ~ 1200 ºC –346 ~ 2192 ºF 0.1 ºC/0.1 ºF 0.3% + 3 ºC 0.3% + 6 ºF
RANGE RESOLUTION ACCURACY
ºC ºF ºC ºF
U1253A TEMPERATURE SPECIFICATIONS
THERMOCOUPLE
TYPE
K
J
–200 ~ –40 °C –104 ~ –40 °F 0.1 ºC/0.1 ºF 1% + 3 °C 1% + 5.4 °F
–40 ~1372 °C –40 ~ 2502 °F 0.1 °C /0.1 °F 1% + 1 °C 1% + 1.8 °F
–210 ~ –40 °C –346 ~ –40 °F 0.1 °C /0.1 °F 1% + 3 °C 1% + 5.4 °F
–40 ~ 1200 °C –40 ~ 2192 °F 0.1 °C /0.1 °F 1% + 1 °C 1% + 1.8 °F
[1] Input impedance: >1 GW for 50 mV~1000 mV ranges. For U1251A, input impedance is 10 MW (nominal) for 5 V~1000 V ranges. For U1252A/3A, input impedance
is 10 MW (nominal) in parallel with 1.1 MW at dual display.
[2] The accuracy could be 0.05% + 10 for U1251A and 0.05% + 5 for U1252A/3A. Always use the NULL function to zero out the thermal effect before measuring the signal.
[3] The accuracy of 500 W and 5 kW is specifi ed after NULL function, which is used to subtract the test lead resistance and the thermal effect.
[4] For the range of 50 MW and 500 MW, the R.H. is specifi ed for <60%.
[5] The accuracy is specifi ed for <50 nS and after NULL function with open test lead.
[6] Always use the NULL function to zero out thermal effect with open test lead before measuring the signal. If the NULL function is not used, an additional 20 counts
needs to be added to the DC current accuracy. Thermal effect could occur due to the following:
• Wrong operation to measure the high voltage of 50 V ~ 1000 V for resistance, diode, and mV measurements.
• After battery-charging has completed.
• After measuring a current greater than 440 mA, it is suggested that the meter be left to cool down for twice the measuring time used.
[7] Current can be measured up to 10 A continuously. An additional 0.5% needs to be added to the specifi ed accuracy if the signal measured is in the range of 10 A~20 A
for 30 seconds maximum. After measuring a current of > 10 A, leave the meter to cool down for twice the measuring time used before application of low current
measurement.
RANGE RESOLUTION ACCURACY
ºC ºF ºC ºF
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