Three Phase Electric Energy Meter Field Calibration Equipment
HZ-3521A Three Phase Electric Energy Meter Field Calibration Equipment
I.Overview
The HZ-3521A is a field calibration instrument for three-phase watt-hour meters, built around a popular ARM processor with a 168 MHz main frequency, 128 MB of memory, and expandable storage via a 4G memory card. It features a 7-inch high-definition color touch screen driven by the emWin graphical interface, delivering a user-friendly experience with full touch-screen operation-eliminating the need for a physical keyboard. The instrument also supports a file system for seamless data exchange with a computer.
II.Input Characteristics
| Parameter Category | Specification Details |
| Input characteristics | - Voltage: 2～450V (automatic conversion limit) |
| - Current measurement range (clamp type current transformer): 0.1～5A (20A, 100A, 500A optional) | |
| - Phase angle: 0～359.9º | |
| - Frequency: 45 ~ 55Hz | |
| Accuracy | 0.05 (assuming full-scale accuracy, consistent with original specification) |
| Working temperature | -20℃～+50℃ |
| Working power & Power consumption | - Working power: 80V～265V AC |
| - Machine power consumption: ≤3VA | |
| Volume | Length: 280mm, Width: 200mm, Height: 75mm |
| Weight | 2.5kg |
| Insulation | a. Insulation resistance between voltage/current input terminals and casing: ≥100MΩ |
| b. Withstand 2kV (rms) power frequency between working power input end and outer casing, duration: 1 minute |
After-sales Service
Within one year from the date of purchase, the instrument belongs to the company's product quality problems for free maintenance, providing maintenance and technical services for life. If the instrument is found to be abnormal or malfunctioning, please contact the company in time to arrange the most convenient treatment plan and provide you with the fastest on-site service.
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