Amprobe AMP-330 1000A AC/DC TRMS Motor Maintenance Clamp Meter
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Amprobe AMP 330
The Amprobe AMP-330 is a versatile clamp-on amp meter, ideal for electrical motor maintenance and HVAC testing in high-voltage industrial settings. As the top model in the AMP-300 Series, it incorporates all the features of the AMP-320, with added benefits like a built-in work light, peak hold, and enhanced safety ratings of CAT IV 600V and CAT III 1000V. Its large 2.0-inch (51 mm) jaw makes it perfect for handling various wire sizes.
For HVAC technicians, the AMP-330 provides essential functions such as temperature and capacitance measurements along with DC microamps for testing flame sensors. Core motor testing features include motor rotation, 3-phase sequence testing, and inrush current measurement to monitor motor startup.
Amprobe AMP-330 Key Features
- Measures AC/DC Current to 1000 A and AC/DC Voltage to 1000 V
- Measures temperature from -40° to 752°F, (-40° to 400°C)
- Measures DC Microamps output to test proper operation of the flame sensor on gas appliances
- Measures capacitance, test diodes, and features a continuity beeper
- Tests 3-phase sequence and motor rotation to ensure proper connection of a motor to a 3-phase system
- Monitors inrush current during motor start-up
- Features True-RMS sensing for accurate voltage measurements in noisy electrical environments
- Amp-Tip function delivers precise low AC current measurements – 0 to 60 A
- Includes a low pass filter to accurately measure voltage and current on variable frequency drives
- Provides resistance and continuity measurement capabilities to verify the quality of electrical connections and the proper operation of motor and transformer coils
- Provides data hold, relative zero, and MAX/MIN/AVG mode for quick analysis
- Maximizes battery life with auto power off and low battery indicator
- Backlit display for easy measurement viewing in bright and dim environments
- CAT IV 600 V, CAT III 1000 V safety rated
- Boasts peak hold and work light
- Accommodates conductors up to 2.0 inches (51 mm)
specifications
| FEATURE | AMP-210 | AMP-220 | AMP-310 | AMP-320 | AMP-330 | |
| AC voltage (True-rms) | Range: | 0 to 600.0 V | 0 to 1000.0 V | |||
| Accuracy: | ±1.0% + 5LSD (50 to 60 Hz) | ±0.8% + 5LSD (50 to 60 Hz) | ||||
| DC voltage | Range: | 0 to 600.0 V | ||||
| Accuracy: | ±1.0% + 5LSD | |||||
| AC+DC voltage | Range: | – | 0 to 600.0 V | – | 0 to 600.0 V | 0 to 1000.0 V |
| Accuracy: | – | ±1.2% + 7LSD (50 to 60 Hz) | – | ±1.2% + 7LSD (50 to 60 Hz) | ±1.0% + 7LSD (50 to 60 Hz) | |
| ±1.8% + 7LSD (DC 40 to 200 Hz) | ||||||
| ±1.2% + 7LSD 200 to 400 Hz) | ||||||
| AC current | Range: | 0 to 600.0 A | ||||
| Accuracy: | ±1.8% + 5LSD (50 to 60 Hz) | |||||
| ±2.0% + 5LSD (100 to 400 Hz) | ||||||
| DC current | Range: | – | 0 to 600.0 A | – | 0 to 600.0 A | 0 to 1000.0 A |
| Accuracy: | – | ±2.0% + 5LSD (DC 50 to 100 Hz) | – | ±2.0% + 5LSD (DC 50 to 100 Hz) | ±1.8% + 5LSD (DC 50 to 100 Hz) | |
| AC+DC current | Range: | – | 0 to 600.0 A | – | 0 to 600.0 A | 0 to 1000.0 A |
| Accuracy: | – | ±2.2% + 7LSD (DC 50 to 100 Hz) | – | ±2.2% + 7LSD (DC 50 to 100 Hz) | ±2.2% + 7LSD (40 to 100 Hz) | |
| ±2.7% + 7LSD (100 to 400 Hz) | ±2.7% + 7LSD (100 to 400 Hz) | ±2.5% + 7LSD (100 to 400 Hz) | ||||
| Precise low current AC | Range: | 0 to 60.00 A | ||||
| Accuracy: | ±1.5% + 5LSD (50 to 60 Hz) | ±1.5% + 5LSD (50 to 60 Hz) | ||||
| ±2.0% + 5LSD (0.00 to 20.00 A, 100 to 400 Hz) | ||||||
| ±3.0% + 5LSD (>20.00 to 60.00 A, 40 to 100 Hz) | ||||||
| ±3.0% + 5LSD (>20.00 to 60.00 A, 100 to 100 Hz) | ||||||
| Precise low current DC | Range: | – | 0 to 60.0 A | – | 0 to 60.0 A | 0 to 60.00 A |
| Accuracy: | – | ±2.0% + 5LSD | – | ±2.0% + 5LSD | ±1.5% + 5LSD (0.00 to 20.00 A) | |
| ±3.0% + 5LSD (>20.00 to 60.00 A) | ||||||
| Micro amps | Range: | – | – | 0 to 2000 µA | ||
| Accuracy: | – | – | ±1.0% + 5LSD | |||
| Frequency | Range: | 5.00 to 999.9 Hz | ||||
| Accuracy: | ±1.0% + 5LSD (600 V range) | |||||
| Range: | 50.0 to 400.0 Hz | |||||
| Accuracy: | ±2.0% + 4LSD (600 A range) | |||||
| Resistance | Range: | 0.0 to 60.00 kΩ | ||||
| Accuracy: | ±1.0% + 5LSD | |||||
| Capacitance | Range: | 0.0 to 2500 µF | ||||
| Accuracy: | ±2.0% + 4LSD | |||||
| Continuity beeper | ON ≤ 10 Ω | |||||
| Off > 250 Ω | ||||||
| Temperature* | – | – | -40.0 to 752 °F | |||
| (Type K thermocouple) | -40.0 to 400 °C | |||||
| – | – | ±1.0% + 3.0 °F (-40.0 to 14.0 °F) | ||||
| ±1.0% + 1.5 °F (>40.0 to 99.9 °F) | ||||||
| ±1.0% + 2.0 °F (100 to 752 °F) | ||||||
| ±1.0% + 1.5 °C (-40.0 to 10.0 °C) | ||||||
| ±1.0% + 0.8 °C (>-10.0 to 99.9 °C) | ||||||
| ±1.0% + 1.0 °C (100 to 400 °C) | ||||||
| Non-contact voltage | 10 V to 1000 V AC (50 to 60 Hz) | |||||
| Phase rotation indication | – | – | Rotation-R for main supply | |||
| Rotation-M for motors | ||||||
| Diode test | • | • | • | • | • | |
| Jaw opening | 1.18 in (30 mm) | 1.37 in (35 mm) | 1.18 in (30 mm) | 1.37 in (35 mm) | 2.0 in (51 mm) | |
| Safety rating | CAT III 600 V | CAT IV 600V | ||||
| CAT III 1000 V | ||||||
| Special Features | ||||||
| In-rush current | – | • | • | • | • | |
| Peak hold (Crest) | – | – | – | – | • | |
| Relative zero | • | • | • | • | • | |
| Max/Min/Avg | • | • | • | • | • | |
| Data hold | • | • | • | • | • | |
| Backlight | • | • | • | • | • | |
| Auto power off | • | • | • | • | • | |

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