Specifications | 392 & 393 | 391A | 390A
| 389A | 388B | Volts | True RMS reading | True RMS reading | - | - | - | DC Ranges | 600 mV, 6 V, 60V, 600 V, 1000 V | 200 mV, 2 V, 20 V, 200 V, 1,000 V | 400 mv, 4 V, 40 V, 400 V, 1000 V | AC Ranges | 600 mV, 6 V, 60V, 600 V, 750 V | 200 mV, 2 V, 20 V, 200 V, 750 V | 400 mv, 4 V, 40 V, 400 V, 750 V | Resolution | 0.01 mV, 0.1 mV, 1 mV, 10 mV, 100 mV | 10 µV, 100 mV, 1 mV, 10 mV, 100 mV | 100 µV, 1 mV, 10 mV, 100 mV, 1 V | Basic DC Accuracy | ±(0.08% rdg + 5 dgt) | ± (0.05% + 3 dgt) | ± (0.1% rdg + 2 dgt) | ±(0.25% rdg + 2 dgt) | ±(0.5% rdg + 1 dgt) | Bask AC Accuracy | ±(1.5% rdg + 20 dgt) 500 Hz -1 kHz | ±(2% + 10 dgt) 500 Hz - 2 kHz | ±(1.5% rdg +5 dgt) 500 Hz - 1 kHz | ±(1.5% rdg +3 dgt) 500 Hz - 1 kHz | Overload Protection | 1000 VDC or 750 VAC rms | 1200 VDC or AC rms 500 VDC/AC rms 15 sec on 200 mV range | 1100 VDC or AC rms | 1000 VDC or peak AC | 1200 VDC or AC rms 500 VDC/AC rms 15 sec on 200 mV range | Input Impedance | 10 MΩ, 11 MΩ on 6 V range | 10 mΩ | 400 mV: >100 mΩ, 4V: 10 MΩ | 40 V - 1000 V: 9.1 MΩ | 10 MΩ |
Specifications | 392 & 393 | Current | Ranges | 600 μA, 6000 μA, 60 mA, 400 mA, 20 A* | Resolution | 10 nA, 100 nA, 1 μA, 10 μA, 1 mA | DC Accuracy | 600 μA to 60 mA: ±(0.5% rdg + 10 dgt) 400 mA: ±(1.0% rdg + 10 dgt) 20 A: ±(2.0% rdg + 10 dgt) | AC Accuracy | 600 μA to 400 mA: ±(1.5% rdg + 20 dgt) 20 A: ±(2.5% rdg + 20 dgt) | Input Protection | μA/mA input: 0.5A/100V fast blow ceramic fuse 20A input: 20A/600A fast blow ceramic fuse | Max. Burden Voltage | 500 mV on 600 μA & 60 mA ranges, 2 V on 6000 μA range | Resistance | Ranges | 600 Ω, 6 kΩ, 60 kΩ, 600 kΩ, 6 MΩ, 60 MΩ | Resolution | 10 mΩ, 100 mΩ, 1 Ω, 10 Ω, 100 Ω, 1 kΩ | Accuracy | 600 Ω: ±(0.3% rdg + 20 dgt), 6 kΩ to 6 MΩ: ±(0.3% rdg + 10 dgt), 6 MΩ: ±(1.0% rdg + 10 dgt), 60 MΩ: ±(3.0% rdg + 20 dgt) | Open Circuit Voltage | -1.2 VDC typical, -3.0 VDC typical on 600 Ω range | Overload Protection | 600 VDC or 600 VAC rms | Diode Test | Tested at 0.5 mA, 2 VDC max. typical ±(2.0% rdg + 10 dgt) accuracy | Transistor Test (hFE) | Does not apply | Capacitance | Ranges | 6 nF, 60 nF, 600 nF, 6 μF, 60 μF, 600 μF, 6 mF | Resolution | 1 pF, 10 pF, 100 pF, 1 nF, 10 nF, 100 nF, 1 μF | Accuracy | 6 nF: ±(3% rdg+30 dgt), 60 nF to 600 μF: ±(3% rdg +10dgt), 6 mF: ±(5% rdg+10 dgt) | Test Voltage | <1 V | Overload Protection | 600 VDC or 600 VAC rms | Frequency | Ranges | 60 Hz, 400 Hz, 6 kHz, 60 kHz, 600 kHz, 6 MHz, 10 MHz | Resolution | 0.0001Hz, 0.01 Hz, 0.1 Hz, 1 Hz, 10 Hz, 100 Hz, 1 kHz | Accuracy | ±(0.1% rdg + 10 dgt) | Sensitivity | >100 ns | Minimum Pulse Width | >25 ns | Duty Cycle Limits | >30% & <70% | Minimum Input Range | >0 Hz | Overload Protection | 600 VDC or 600 VAC rms | Logic Test | Logic Threshold | - | Frequency Response | - | Pulse Width | - | Pulse Limits | - | Indication | - | Overload Protection | - | Temperature | Range, Resolution | -58° to +2372°F, 0.1F°, (-50°to + 1300°C, 0.1C°) | Accuracy | ±(2.0% rdg + 6°F) -58°F to 32°F & 750°F to 2372°F, ±(1.0% rdg + 2°F) 32°F to 750°F ±(2.0% rdg + 3°C) -50° to 0°C & 400°C to 1300°C, ±(1.0% rdg + 1°C) 0°C to 400°C | Duty Cycle | Range, Resolution | 5 to 95%, 0.1% | Accuracy (5V logic) | ±(2.0% rdg + 10 dgt) | Minimum Pulse Width | 10 μs | Frequency Range | 40 Hz to 20 kHz | Overload Protection | 600 VDC or 600 VAC rms | General | Display | 60000 count, 4 5/6 digit LCD | Polarity | Automatic, positive implied, negative polarity indication | Operating Temperature | 32° to 122° (0° to 50°C), 0 to 70% R.H. | Dimensions (HxWxD) | 7.8 x 3.5 x 1.57" (198 x 90 x 40 mm) | Weight | 14.1 oz. (400 g) | Three-Year Warranty | Included Accessories 9 V battery, test leads, instruction manual, thermocouple probe (models 390A, 392, & 393), software and USB interface cable (models 390A & 393) |
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