Multi Measuring Instruments
HWT-301 Digital Harmonics Clamp Tester
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- SKU:
- HWT-301
- Weight:
- 440.00 Grams
Description
HWT-301 Digital Harmonics Clamp Tester
The HWT-301 Digital Harmonics Clamp Tester is a True RMS measuring instrument designed to measure AC leakage current, AC voltage, and current and voltage harmonics up to the 25th order. It provides four AC current measurement ranges—400 mA, 4 A, 40 A, and 300 A—with a 40 mm clamp opening.
The HWT-301 uses a synchronous filter method for harmonic measurements and supports AC voltage and resistance measurement. Additional functions include Data Hold and automatic power-off. The instrument complies with IEC 61010-1 and IEC 61010-2-032 safety requirements, with ratings of CAT II 600 V and CAT III 300 V.
What are harmonics ? Let's try to measure by HWT 301
Accuracy Specifications
Conditions: 23°C ± 5°C, 80% RH or less.
| Function | Range | Resolution | Accuracy | Max. Input |
|---|---|---|---|---|
| AC Current | 400 mA | 0.1 mA | ±1.0% rdg ± 8 dgt | AC 300 Arms |
| 4 A | 1 mA | ±1.0% rdg ± 8 dgt | AC 300 Arms | |
| 40 A | 10 mA | ±1.0% rdg ± 8 dgt | AC 300 Arms | |
| 300 A | 100 mA | ±1.0% rdg ±1% of full scale | AC 300 Arms | |
| AC Voltage | 400 mV | 0.1 mV | ±1.0% rdg ± 8 dgt | AC 250 Vrms |
| 400 V | 100 mV | ±1.0% rdg ± 8 dgt | AC 450 Vrms | |
| Resistance (Ω) | 4000 Ω | 1 Ω | ±1.0% rdg ± 8 dgt | AC 400 Vrms |
Harmonics Mode Specifications
| Parameter | Specification |
|---|---|
| Measuring Method | Synchronous filter |
| Measurable Harmonics | Fundamental to 25th harmonics |
| Minimum Input | More than 5% of full scale in each range |
| Harmonics Accuracy | 1st–9th: (±1% rdg ± 5 dgt) ± basic accuracy of ACA or ACV − error by neighboring harmonics |
| 10th–19th: (±2% rdg ± 5 dgt) ± basic accuracy of ACA or ACV − error by neighboring harmonics | |
| 20th–25th: (±5% rdg ± 5 dgt) ± basic accuracy of ACA or ACV − error by neighboring harmonics |
Accuracy Condition: Harmonics accuracy applies when harmonic content exceeds 4% relative to the fundamental input.
Key Features –HWT-301 Digital Harmonics Clamp Tester
- True RMS Measurement: Measures AC current and voltage with True RMS conversion.
- Harmonics Analysis: Measures fundamental through 25th-order harmonics using a synchronous filter method.
- AC Current Measurement: Four ranges from 400 mA to 300 A.
- 40 mm Clamp Opening: Accommodates conductors up to 40 mm in diameter.
- Safety Compliance: IEC 61010-1 and IEC 61010-2-032, rated CAT II 600 V / CAT III 300 V.
Additional Information
Safety standard: |
IEC 61010-1, IEC 61010-2-032, Installation Categoryâ…¡600V or Categoryâ…¢300V |
Accuracy: |
See accuracy specifications in description tab |
Display: |
3.5 digit LCD, max. reading of 3999 |
Jaw opening capability: |
40mmφ |
Crest factor: |
< 3 (0～50% of range) || < 2 (50～100% of range) |
Auto power off: |
Approx.20 minutes later after power on |
Over range indication: |
"OL" mark on LCD |
Data hold indication: |
"DH" mark on LCD |
Low battery indication: |
"B" mark on LCD |
Sampling rate: |
2 times/sec |
Storage temperature: |
-10～60℃, < 70%RH (without condensation) |
Power supply: |
1.5V (AM-4, LR03 or AAA)×3 |
Dimension: |
70(W)×223(H)×34(D)mm |
Accessories: |
Hard carrying case, Instruction manual, Batteries |
AC Conversion: |
True rms responding |
Power consumption: |
13mA |
E.M.C. standard: |
EN 61326 |
Measuring method: |
Dual slope integration mode |
Battery life: |
Approx.50 hours continuous |
Affection of magnetic field: |
3mA or less (at 100A nearby conductor) |
Input Frequency: |
45Hz～65Hz |
Withstanding Voltage: |
AC 3700V 1 minute max. (Between the core of CT and outer case) |
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