KEYSIGHT U1253B True RMS OLED Multimeter User Guide

Keysight U1253B True

RMS OLED Multimeter
Quick Start
Guide

Contacting Keysight

www.keysight.com/find/assist

(worldwide contact information for repair and service)

Safety Information

This meter complies with safety and EMC requirements.

Refer to Declaration of Conformity at http://www.keysight.com/go/ conformity for the latest revision.

This meter is also in compliance with CAT III 1000 V/Category IV 600 V, Pollution Degree II. Use with standard or compatible test probes.

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 the instrument 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 U1253B True RMS OLED Multimeter Users and Service Guide. Keysight U1253B Quick Start Guide

The following items are included with your multimeter:
✔ Test leads
✔ Test probes
✔ Alligator clips
✔ Rechargeable 8.4 V battery
✔ Power cord and AC adapter
✔ 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 U1253B True RMS OLED Multimeter Users and Service Guide on the 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.

Charging the Battery

It is strongly recommended that you use the specified 24-volt DC adapter included as an accessory to charge the rechargeable battery.

1. Remove the test leads from the multimeter and turn the rotary switch to .
2. Plug the DC adapter into a power outlet.
3.  Insert the red (+) and black (–) banana plugs (4 mm plugs) of the DC adapter to the terminals respectively. Ensure that the polarity of the connection is correct.
4. The display will show a countdown timer of 10 seconds for the self-test to start. The multimeter will output short single-tone sounds to remind you to charge the battery. Press to start charging the battery, or the multimeter will automatically start charging after 10 seconds. It is recommended not to charge the battery if the battery
   capacity is over 90%.

NOTE
For the battery charger, the main supply voltage fluctuations must not exceed ±10%.

CAUTION

– Do not rotate the rotary switch from the position when charging the battery.

– Perform battery charging only with 7.2 V or  8.4 V NiMH rechargeable battery, 9 V size.

– Disconnect test leads from all the terminals when charging the battery.

– Ensure proper insertion of battery in the multimeter, and follow the correct polarity.

– A new rechargeable battery comes in a  discharged condition and must be charged before use (refer to the U1253B User’s and Service Guide for charging instructions).

– Upon initial use (or after a prolonged storage period), the rechargeable battery may require three to four charge/discharge cycles before achieving maximum capacity. To discharge, simply run the multimeter under the rechargeable battery’s power until it shuts down or the low battery warning appears.

– The multimeter may indicate that charging is complete after ten minutes when charging a new rechargeable battery. This is a normal phenomenon with rechargeable batteries.

Remove the rechargeable battery from the device, reinsert it, and repeat the charging procedure.

Functions and Features

Press and hold for > 1 s.

Offsets the measured value|  Press.
Changes the measurement range|  Press.
Turns on auto range| Press and hold for > 1 s.
Turns on dual display| Press
Starts manual data logging| Press for > 1 s,  .
Views the logged data| Press for > 1 s, press or
to scroll through the logged data.
Clears the logged data| Press for > 1 s, press
for > 1 s.

NOTE
Your multimeter is capable of remote data logging. To use this feature, you will need an IR-USB cable (U1173A, purchased separately) and the Keysight GUI Data Logger Software (downloadable from www.keysight.com/find/hhTechLib)).

Input Terminals and Overload Protection

< 0.3 A short circuit
current
Resistance| | |
Capacitance| | |
Temperature| | |
Current (mA 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

Performing Voltage Measurements

Measuring AC voltage

1. Set the rotary switch to v. For and mode, press to ensure is shown on the display.
2. Connect the red and black test leads to input terminals V. mV (red ) and COM (black) respectively.
3. Probe the test points and read the display.
4. Press to display dual measurements. The parameter can be switched consecutively.  Measuring DC voltage

NOTE
For measuring DC voltage from a mixed signal in DC measurement mode, ensure that the Filter is enabled.

1. Set the rotary switch to or . Ensure that is shown on the display.
2. Connect the red and black test leads to input terminals V. mV (red) and COM (black) respectively.
3. Probe the test points and read the display.
4. Press to display dual measurements. The parameter can be switched consecutively.

Using the Filter

1. Press and hold for more than 1 second to enter the multimeter’s Setup menu.
2. Press scroll to menu 6.
3. Press browse to the DC Filter option.
4. Press enter the Edit mode.
5. Press or enable the DC Filter.
6. Press for more than 1 second to save your changes and exit the Edit mode.
7. Press and hold until the meter restarts and returns to its normal operating mode.

CAUTION
To avoid possible electric shock or personal injury, enable the Filter to verify the presence of hazardous DC voltages. Displayed DC voltages can be influenced by high-frequency AC components and must be filtered to assure an accurate reading.

Performing Current Measurements

To perform current measurements, set up your multimeter as shown in the figure below. For measuring DC current from a mixed-signal in DC measurement mode, ensure that the Filter is enabled.

Measuring AC current

1. Set the rotary switch to or. Press to ensure is shown on the display.
2. Connecting the red and black test leads to input terminals μA.mA (red) and COM (black) or A (red) and COM (black) respectively.
3. Probe the test points in series with the circuit and read the display.

Measuring DC current

1. Set the rotary switch to or .   Ensure that is shown on the display.
2. Connecting the red and black test leads to input terminals μA.mA (red) and COM (black) or A (red) and COM (black) respectively.
3. Probe the test points in series with the circuit and read the display.

CAUTION
– If the current is ≤440 mA, connect the red and black test leads to input terminals μA.mA (red) and COM (black).
– If the current is > 440 mA, connect the red and black test leads to input terminals A (red) and COM (black).

Performing Resistance, Conductance, and Continuity Measurements

1.  Set the rotary switch to .
2. Connect the red and black test leads to input terminals Ω (red ) and COM (black) respectively.
3. Probe the test points (by shunting the resistor) and read the display.
4. Press to scroll through audible continuity ( ), conductance (   ), and resistance tests as shown.

Performing Capacitance and Temperature Measurements

Capacitance

1. Set the rotary switch to .
2. Connect the red and black test leads to input terminals (red) and COM (black) respectively.
3.  Connecting the red test lead to the positive terminal of the capacitor, and the black test leads to the negative terminal.
4. Read the display.

Temperature

1. Set the rotary switch to . Press to select temperature measurement.
2. Connect the red and black test leads to input terminals (red) and COM (black) respectively.
3. Plug the thermocouple adapter (with the thermocouple probe connected to it) into input terminals (red) and COM (black).
4. Touch the measurement surface with the thermocouple probe.
5. Read the display.

Frequency and Frequency Counter Measurements

Frequency Measurement
During AC/DC voltage or AC/DC current measurements, you can measure the signal frequency by pressing at any time.
Frequency Counter Measurement

1. Set the rotary switch to .

2. Press to select the frequency counter ( ) function. The default input signal frequency is divided by 1. This allows signals up to a maximum frequency of 985 kHz to be measured.

3. Connect the red and black test leads to input terminals V (red) and COM (black) respectively.

4. Probe the test points and read the display.

5.  If the reading is unstable or zero, press to select division of input signal frequency by 100 ( will be shown on the display). This accommodates a higher frequency range of
   up to 20 MHz.

6. The signal is out of the U1253B frequency measurement range of 20 MHz if the reading is still unstable after step 5.

WARNING
– Use the frequency counter for low voltage applications. Never use the frequency counter on AC power line systems.
– For input more than 30 Vpp, you are required to use the frequency measurement mode available under the current or voltage measurement instead of the frequency counter.

Square Wave Output

1.  Turn the rotary switch to .
2.  Press to select duty cycle (%) on the primary display.
3.  The default square wave frequency is 600 Hz as shown by the secondary display, with a 50% duty cycle as shown by the primary display.
4. Press scroll through the available frequencies (there are 28 frequencies to choose from).
5. Press adjust the duty cycle. The duty cycle can be set from 0.390625% to 99.609375%, in steps of 0.390625%. The displayed duty cycle has a resolution of 0.001%.

This information is subject to change

without notice. Always refer to the

Keysight website for the latest revision.

© Keysight Technologies 2009-2021

Edition 7, June 2021www.keysight.com

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