The Fluke 189 is a high-resolution True RMS digital multimeter built for professional electronics troubleshooting, service, and preventive maintenance. Its dual 5½-digit display—primary 50,000 counts, secondary 5,000 counts—combined with a 40 Hz analog bar graph delivers real-time signal observation across AC and DC domains. With 0.025% basic DC voltage accuracy and 100 kHz AC bandwidth, the 189 captures precise measurements in complex industrial and field environments. Data logging stores up to 3 days of continuous readings with timestamp correlation, enabling intermittent fault detection without bench presence. MIN/MAX/AVG recording with peak capture as fast as 250 µs pinpoints transient anomalies.
Technical Specifications
Voltage & Current
• DC voltage: 500.000 mV to 1000.0 V, ±(0.025% + 5) accuracy, 10 µV resolution
• AC voltage (True RMS): 500.000 mV to 1000.0 V, ±(0.4% + 40) accuracy
• DC current: 500.00 µA to 10.00 A, ±(0.05% + 2) accuracy
• AC current (True RMS): 500.00 µA to 10.00 A, ±(0.6% + 2) accuracy; 10 A continuous, 20 A for 30 seconds maximum
Resistance, Capacitance & Frequency
• Resistance: 500.00 Ω to 500.00 MΩ, ±(0.05% + 2) accuracy
• Capacitance: 50.000 nF to 50.00 mF
• Frequency: 5.000 Hz to 500.0 kHz, ±(0.005% + 1) accuracy
Additional Functions
• Temperature: °C and °F via optional K-type thermocouple
• Continuity with audible beep
• Diode test, conductance (nS), dBm/dBV measurements
• Auto and manual ranging
– Key Features
• Data logging: 995 readings stand-alone, 1000 in internal memory with interval and event logging (default 4% threshold)
• Time-stamped MIN/MAX/AVG with 250 µs peak capture
• IR interface for wireless data transfer to PC
• FlukeView® Forms software compatibility for analysis and documentation
– Environmental Specifications
• Operating temperature: −20 °C to +55 °C
• Storage temperature: −40 °C to +60 °C
– Compatibility & Integration
Infrared PC interface enables wireless data transfer and integration with FlukeView® Forms software for customized reporting and post-test analysis.
