KEYSIGHT U1272A Handheld Digital Multimeter User Manual

1. Introduction

This manual provides essential information for the safe and effective operation of the KEYSIGHT U1272A Handheld Digital Multimeter. The U1272A is a robust, 4.5-digit, water and dust resistant multimeter designed for professional use in various electrical measurement applications. It features an Organic LED display and intelligent functions to enhance productivity and safety.

2. Safety Information

WARNING:

• Always adhere to local and national safety codes.
• Do not use the multimeter if it appears damaged or is operating abnormally.
• Ensure test leads are in good condition and properly connected before making measurements.
• Observe all terminal ratings and maximum input values.
• This product is intended for professional use only.

The U1272A is rated CAT IV 600V and CAT III 1000V, indicating its suitability for measurements in high-energy electrical environments. Always use appropriate personal protective equipment (PPE).

3. Product Overview

The KEYSIGHT U1272A is designed for ergonomic handling and durability, featuring an IP54 rating for water and dust resistance.

Figure 3.1: Front view of the U1272A multimeter, showing the OLED display, function dial, and input terminals.

Figure 3.2: Side view of the U1272A multimeter, highlighting its ergonomic, non-slip design.

Figure 3.3: Back view of the U1272A multimeter, showing the battery compartment and stand.

Key Features:

• 30,000 counts resolution with 0.7% for ACV accuracy.
• Organic LED (OLED) display for clear readings in various lighting conditions.
• Intelligent features like Low Pass Filter (LPF) for noise elimination and Qik-V for quick AC/DC voltage determination.
• Visual alert blinks in addition to the beeper for Continuity test in noisy environments.
• IP54 certified for water and dust resistance.
• Connectivity to PC/internal memory for logging up to 10,000 readings.

4. Setup

4.1 Battery Installation

The U1272A is powered by batteries. To install or replace batteries:

1. Ensure the multimeter is turned OFF and disconnect all test leads from the terminals.
2. Locate the battery compartment cover on the back of the unit (refer to Figure 3.3).
3. Unscrew the retaining screws and carefully remove the cover.
4. Insert new batteries, observing correct polarity (+/-) as indicated inside the compartment.
5. Replace the cover and secure it with the screws.

4.2 Initial Power On

After battery installation, turn the rotary switch to any function to power on the device. The OLED display will illuminate, and a self-test will be performed. If the display does not light up, check battery installation.

5. Operating Instructions

5.1 Basic Measurements

To perform basic measurements, select the desired function using the rotary switch and connect the test leads to the appropriate input terminals.

• Voltage Measurement (V~, V-): Connect the red lead to the VΩHz terminal and the black lead to the COM terminal. Select AC (V~) or DC (V-) voltage.
• Current Measurement (A, mA, µA): Connect the red lead to the appropriate current terminal (10A, 440mA, or µA) and the black lead to the COM terminal. Select the desired current range. Ensure the circuit is de-energized before connecting the multimeter in series.
• Resistance Measurement (Ω): Connect the red lead to the VΩHz terminal and the black lead to the COM terminal. Select the Ω function.
• Continuity Test (audible beep and visual alert): Connect the red lead to the VΩHz terminal and the black lead to the COM terminal. Select the continuity function. The meter will beep and visually alert for continuity.

5.2 Advanced Features

• LPF (Low Pass Filter): Activates a low pass filter to remove high-frequency noise and harmonics, useful for measurements on variable frequency drives (VFDs).
• Qik-V: Allows for quick determination of AC or DC voltage without manually selecting the mode.
• Data Logging: The U1272A can store up to 10,000 readings. Refer to the detailed user manual for instructions on setting up logging intervals and transferring data to a PC.

6. Maintenance

6.1 Cleaning

To clean the multimeter, wipe the case with a damp cloth and a mild detergent. Do not use abrasives or solvents. Ensure the device is powered off and leads are disconnected before cleaning.

6.2 Calibration

The U1272A is factory calibrated. For continued accuracy, periodic calibration by a qualified service center is recommended. Refer to Keysight's official support channels for calibration services.

6.3 Storage

When not in use for extended periods, remove the batteries to prevent leakage. Store the multimeter in a cool, dry place, away from direct sunlight and extreme temperatures.

7. Troubleshooting

For issues not listed here, or if solutions do not resolve the problem, contact Keysight customer support.

8. Specifications

9. Warranty and Support

9.1 Warranty Information

KEYSIGHT products are designed for professional use and come with a standard manufacturer's warranty. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Keysight Technologies website. Keep your proof of purchase for warranty claims.

9.2 Customer Support

For technical assistance, service, or calibration inquiries, please contact Keysight Technologies customer support. Visit www.keysight.com/us/en/support.html for contact information and resources.