Keysight (Agilent) U1241B Basic Digital Multimeter, True RMS AC, 4 Digit, 10K Count

The Keysight U1241B is a handheld digital multimeter engineered for field electrical testing and maintenance. It delivers True RMS AC measurement across voltage, current, and resistance with a 4-digit, 10,000-count LCD display and integrated bargraph. The meter supports DC voltage to 1000 V with ±0.09% + 5 accuracy, AC voltage to 1000 V at ±1% + 5, and current measurement to 10 A across both DC and AC domains. Resistance measurement spans 100 Ω to 100 MΩ, while capacitance ranges from 0.1 nF to 10 mF at ±2% + 4 digits accuracy.

– Technical Specifications

Voltage & Current
• DC Voltage: 1000 mV to 1000 V, ±0.09% + 5 accuracy, 0.1 mV resolution
• AC Voltage: 1000 mV to 1000 V, ±1% + 5 accuracy, 0.1 mV resolution
• DC Current: 0.1 µA to 10 A, ±0.1% + 3 accuracy, 0.1 µA resolution
• AC Current: 0.1 µA to 10 A, ±1% + 5 accuracy, 0.1 µA resolution

Resistance & Capacitance
• Resistance: 100 Ω to 100 MΩ range
• Capacitance: 0.1 nF to 10 mF, ±2% + 4 digits accuracy
• Continuity testing with audible beep
• Diode test function

Advanced Measurements
• Temperature: K-Type thermocouple, -40 to 1000 °C, 0.1 °C resolution, ±1% + 1 °C accuracy
• Switch counter for glitch detection
• Harmonic ratio measurement
• ZLOW mode (low impedance) to eliminate false readings from stray voltages
• Reading rate: up to 7 readings/sec
• Common Mode Rejection Ratio: 90 dB

Display & Power
• 4-digit LCD with bargraph display, 10,000 counts
• Dual-intensity backlighting
• 4 × 1.5 V AAA alkaline batteries, up to 400 hours battery life

– Key Features

• True RMS AC measurement for accurate AC parameter capture
• CAT III 1000 V and CAT IV 600 V overvoltage protection
• IP67 rating for dust and water resistance
• Drop-rated to 3 meters
• Built-in LED flashlight
• Audible and visual alerts
• Optional IR-to-Bluetooth adapter for PC and mobile device logging

– Typical Applications

Electrical maintenance, field troubleshooting, HVAC service, industrial control diagnostics, temperature monitoring, and relay/switch validation.

– Compatibility & Integration

Meter Logger application support. Optional IR-to-Bluetooth adapter enables wireless data logging to external devices.