Agilent/Keysight U1231A Handheld Digital Multimeter

The Keysight U1231A is a handheld digital multimeter designed for versatile electrical testing applications, featuring a 6000-count display and True RMS measurements for accurate readings. Its design incorporates a built-in LED flashlight to aid visibility in low-light conditions, and it offers a flashing backlight as a visual alert for continuity tests in noisy environments. This multimeter provides a comprehensive suite of measurement functions, including resistance, capacitance, frequency, temperature (with an optional module), diode tests, and continuity tests. The U1231A is engineered for rugged field use and includes safety features such as CAT III 600V overvoltage protection. Data logging capabilities allow for the storage of up to 10 readings, with IR-to-USB connectivity for transferring data to a PC.

### Technical Specifications

**General Features**
* **Display:** 6000 counts, 3.5 digit True RMS multimeter
* **Reading Rate:** Up to 5 readings/second
* **Battery Life:** Up to 500 hours
* **Power Source:** Four 1.5 V AAA alkaline batteries
* **Built-in Flashlight:** LED illumination for testing in poorly lit areas
* **Audible Alerts:** Beeps for continuity tests
* **Visual Alerts:** Flashing backlight for continuity tests in noisy environments
* **Data Logging:** Stores up to 10 readings
* **Connectivity:** IR-to-USB connectivity for data transfer to PC (requires optional IR-USB cable U1173A)
* **Optional Connectivity:** Optional U1117A Infrared (IR)-to-Bluetooth adapter for wireless Bluetooth connection
* **Auto-Hold Function:** Yes
* **Display Hold Function:** Yes
* **Min/Max Recording:** Yes
* **Null Function:** Yes
* **Low Impedance Mode (Z_LOW):** Eliminates ghost voltage and improves measurement accuracy
* Input Impedance (Z_LOW): 3 kΩ (nominal)
* **Vsense Function:** Non-contact AC voltage detection
* **Ergonomic Design:** Anti-slip rotary dial for easy function selection, suitable for single-handed operation
* **Ingress Protection:** IP42 rating
* **Altitude:** Suitable for use at altitudes up to 2,000 m
* **Operating Environment:** Designed for indoor use in areas with low condensation

**Electrical Specifications**

* **DC Voltage**
* **Ranges:** 600 mV, 6 V, 60 V, 600 V
* **Accuracy:** 0.5% + 2 counts (for 600 mV to 600 V ranges)
* **Input Impedance:** 10 MΩ (typical)
* **Notes:** Accuracy for the 600 mV range is specified after using the Null function to subtract thermal effects. Auto-ranging is disabled when using VZLOW function; range is set to 600V in manual ranging mode.
* **AC Voltage (True RMS)**
* **Ranges:** 600 mV, 6 V, 60 V, 600 V
* **Accuracy:** 1.0% + 3 counts (for 600 mV to 600 V ranges)
* **Frequency Bandwidth:** 45 Hz to 1 kHz
* 45 Hz to 500 Hz: 1.0% + 3
* 500 Hz to 1 kHz: 2.0% + 3
* **Input Impedance:** 10 MΩ (nominal) in parallel with < 100 pF * **Overload Protection:** 600 Vrms * **DC Current:** Not supported * **AC Current:** Not supported * **Resistance** * **Ranges:** 600 Ω, 6 kΩ, 60 kΩ, 600 kΩ, 6 MΩ, 60 MΩ * **Accuracy:** Specified based on measurement conditions; for 6 MΩ and 60 MΩ ranges, Relative Humidity (RH) is specified for < 60%. * **Buzzer:** Beeps when resistance is < 23 Ω ± 10 Ω * **Maximum Open Voltage:** < +3 V DC * **Overload Protection:** 600 Vrms * **Continuity Capture:** Can capture intermittent measurements longer than 1 ms * **Capacitance** * **Ranges:** 1 nF to 10 mF (various ranges including 1 µF to 10000 µF) * **Accuracy:** Specified based on measurement conditions; accuracy is specified for film capacitor or better after Null function is used. * **Maximum Display:** 1200 counts * **Overload Protection:** 600 Vrms for short circuits with < 0.3 A current * **Frequency** * **Ranges:** 99.99 Hz, 999.9 Hz, 9.999 kHz, 99.99 kHz * **Accuracy:** 0.1% + 2 counts * **Minimum Input Frequency:** 5 Hz * **Diode Test** * **Forward Voltage Drop:** Measured between 0.3 V and 0.8 V * **Open Voltage:** < +3 V DC * **Buzzer:** Beeps once for forward-biased diode or semiconductor junctions * **Maximum Display:** 2100 counts * **Overload Protection:** 600 Vrms for short circuits with < 0.3 A current * **Temperature Measurement:** Requires an optional temperature module such as the U1586B**Safety and Compliance** * **Safety Rating:** CAT III 600V * **Certifications:** CE, ICES/NMB-001, WEEE Directive * **EMC Compliance:** EN61326-1 * **Safety Standards:** EN 61010-1 (IEC 61010-1:2001)**Physical Specifications** * **Dimensions:** 169 mm x 86 mm x 52 mm (H x W x D)### Why Choose Aumictech for Agilent/Keysight U1231A? At Aumictech, we specialize in supplying high-end test and measurement equipment. Whether you need reliable electrical testing solutions, accurate True RMS measurements, or versatile troubleshooting tools for field service and maintenance, our team ensures the Agilent/Keysight U1231A delivers maximum performance for your application. We provide expert support to help you select and implement the right equipment for your specific engineering and procurement needs.