The Fluke 179 True RMS Digital Multimeter combines electrical measurement, temperature sensing, and diagnostic capability in a single instrument for industrial and utility troubleshooting. It delivers True RMS AC/DC voltage and current measurements alongside resistance, capacitance, frequency, continuity, and diode testing. The integrated thermometer eliminates the need for a separate probe, measuring temperature from −40 °C to +400 °C with ±(1.0% + 10) accuracy.
## Technical Specifications
**Voltage & Current Measurement**
• DC Voltage: 0.1 mV to 1000 V, 0.1 mV resolution, ±0.09% basic accuracy
• AC Voltage (True RMS): 0.1 mV to 1000 V, 1 kHz frequency response, ±1.0% basic accuracy
• DC Current: 0.01 mA to 10.00 A (20.00 A overrange for 30 s), 0.01 mA resolution, ±1% basic accuracy
• AC Current (True RMS): 0.01 mA to 10.00 A (20.00 A overrange for 30 s), ±1.5% basic accuracy (500 Hz to 1 kHz)
**Passive Measurements**
• Resistance: 0.1 Ω to 50.00 MΩ, 0.1 Ω resolution
• Capacitance: 1 nF to 9999 µF, 0.01 nF resolution, 1.2% accuracy (≤1000 µF)
• Frequency: 2 Hz to 50 kHz (DMM functions), 2 Hz to 99.99 kHz (AC/DC voltage), 2 Hz to 30 kHz (current), 0.01 Hz resolution
• Diode Test: 2.400 V range, 0.001 V resolution
• Continuity: Beeper guaranteed <25 Ω; detects opens/shorts ≥250 µs
**Temperature**
• Range: −40 °C to +400 °C, 0.1 °C resolution, ±(1.0% + 10) accuracy
## Key Features
• 6000-count digital display, 4 updates/second; 33-segment analog bargraph at 40 updates/second
• Manual and automatic ranging modes
• Display HOLD and Auto HOLD with stable-reading detection
• MIN MAX AVG recording function
• Backlit display with 2-minute auto-off; user-disableable
• CAT III 1000 V / CAT IV 600 V safety rating
• Front-panel closed-case calibration
## Typical Applications
Electrical troubleshooting, HVAC system diagnostics, industrial maintenance, field service, and temperature verification in control systems.
## Compatibility & Integration
Dimensions: 7.28 in H × 3.54 in W. Suitable for deployment in CAT III and CAT IV environments.
