High-Precision DC Standard Meter & Reference Standard (Model HZ611 Series)
The HZ611 Series is an ultra-high-precision, portable DC standard meter and electrical energy reference standard designed to provide laboratory-grade metrology directly in the field. Engineered with an exceptional accuracy threshold reaching up to Level 0.01 / 0.02 class, this compact 8.5 kg system delivers real-time DC voltage, current, power, and electric energy measurements alongside simultaneous high-frequency DC ripple monitoring.
Distributed and supported across India by Myriad Industrial Solutions LLP, the HZ611 acts as a rugged mobile reference standard. It is built specifically to bridge the technology gap for engineers validating high-power DC infrastructure—including solar PV plants, grid-scale battery storage, electric vehicle (EV) fast-charging hubs, and NABL-accredited metrology testing labs.
The Core Challenge: Why Standard Multimeters and Bench Standards Fail Field Teams
Indian infrastructure testing teams traditionally face a major technical bottleneck when verifying high-power DC installations:
- Standard Digital Multimeters (DMMs): While highly portable, standard handheld multimeters lack the strict accuracy class (typically 0.1% or lower) required to officially certify utility tariff billing meters. Furthermore, they cannot calculate energy accumulator metrics or handle real-time pulse error verification.
- Traditional Laboratory Bench Standards: Exceptional lab-grade standards (such as stationary systems from global brands like Fluke or Radian) deliver required precision, but they are heavy, delicate, and entirely restricted to stationary installation inside climate-controlled NABL facilities.
The HZ611 fills this exact market gap. It packs massive 600A / 1200V dynamic range capabilities and 0.01% accuracy into a robust, single-box mobile field kit that handles severe field environments without compromising metrology integrity
Primary Field Applications Across India’s Modern DC Infrastructure
The HZ611 is specifically optimized to meet the auditing, verification, and commissioning demands of rapidly scaling clean energy and commercial sectors across the Indian grid:
- Solar PV Plants & Commercial Energy Storage (BESS): Direct site verification of high-voltage DC collection links, string combiner boxes, central inverter inputs, and battery bank monitoring systems where high-current precision is essential.
- EV Fast-Charging Infrastructure (CPOs & Network Operators): On-site accuracy checks and calibration of DC fast-charging station billing meters, ensuring compliance with evolving weight and measure standards and utility reconciliation.
- NABL Electro-Technical Calibration Laboratories: Functions as an agile secondary transfer standard or working standard for mobile calibration vans and in-house metrology cells running periodic validation verification loops.
- DC Power Distribution Panels & Industrial Facilities: Auditing and diagnostic tracking of high-current shunts, Hall effect sensors, and instrumentation transmitters within refineries, chemical plants, and heavy processing operations.
Looking for AC Substation Meter Validation? View our Three-Phase AC Field Calibration Kit here
Critical Technical Specifications & Operational Limits
- Unrivaled Metrology Accuracy Class: Available in Level 0.01 (HZ6111), Level 0.02 (HZ6112), and Level 0.05 (HZ6115) configuration baselines to match target site standards.
- Uncompromised DC Voltage Range: Direct tracking span from small-signal metrics of 1 mV up to high-capacity 1000 V / 1200 V DC maximum limits across automatic or manual range switching matrices.
- Massive DC Current Dynamics: Handles full-scale direct connection currents from 100 μA up to 50 A (via standard banana plugs) and up to 500 A / 600 A DC (via heavy-duty copper busbar pins).
- Simultaneous Real-Time DC Ripple Measurement: Tracks high-frequency AC ripple content riding on the DC line from 1 Hz to 3 kHz with a baseline display uncertainty limit of ±0.05% RG.
- Energy Pulse Verification Capabilities: Features built-in standard energy pulse input and output channels supporting a massive calibration frequency ceiling (Pulse Input: ≤50 kHz; Pulse Output: ≤100 kHz). This enables automated, real-time meter percentage error calculation right at the panel site.
- Standalone Architecture & Connectivity: Housed in an ergonomic, lightweight chassis (net weight ≤8.5 kg) utilizing a highly intuitive 7.0-inch integrated LCD touchscreen interface. The system includes native RJ45 Ethernet, RS232, RS485, and optional CAN communication ports for a complete automated testing architecture setup.
HZ611 Field Standard vs. Common Industrial Measurement Systems
| Feature / Performance Specification | HZ611 Series Field Standard | High-End Handheld Multimeters (e.g., Fluke 87V / 289 Series) | Fixed Laboratory Bench Standards |
|---|---|---|---|
| Primary Deployment Space | Handled directly on-site at panels, chargers, and combiner boxes. | General electrical maintenance and quick validation tasks. | Permanent installation inside fixed, stationary NABL labs. |
| Accuracy Class Limit | Up to Level 0.01 / 0.02 Class | Typically ranges from 0.05% to 0.1% or lower across high current loops. | Absolute standard thresholds (typically 0.005% to 0.01%). |
| Energy Accumulation / Pulse Check | Built-in pulse I/O ports for direct active error verification. | Lacks pulse validation logic or energy error processing algorithms. | Supported via permanent, multi-rack validation benches. |
| DC Ripple Isolation Capability | Simultaneous 1Hz–3kHz tracking without secondary diagnostic gear. | Requires manual switching to AC mode or an external oscilloscope feed. | Deep laboratory harmonic and ripple analytical mapping. |
| Field Portability Index | Extremely high; handheld/luggage form factor (≤8.5 kg). | Maximum portability; pocket/belt configuration. | Non-portable; requires multi-box rack assembly arrays. |
Frequently Asked Questions (FAQs)
Q: Can the HZ611 determine why a DC billing meter is mismatching with SCADA data at a solar plant inverter link?
A: Yes. By hooking the HZ611 directly into the DC current link via its busbar terminals, it measures the pure DC values with 0.01% class precision. Simultaneously, the built-in ripple measurement identifies if high-frequency AC ripple from the inverter switching blocks is leaking onto the DC line and skewing the meter's internal measurement calculations.
A: Yes. By hooking the HZ611 directly into the DC current link via its busbar terminals, it measures the pure DC values with 0.01% class precision. Simultaneously, the built-in ripple measurement identifies if high-frequency AC ripple from the inverter switching blocks is leaking onto the DC line and skewing the meter's internal measurement calculations.
Q: How does the system handle real-time verification of DC charging pile billing meters?
A: The HZ611 connects inline into the charging line. By feeding the charging meter's electric pulse output into the HZ611's pulse input port, the internal processor runs real-time error verification loops against its own 0.01% standard matrix, instantly displaying the charging meter's exact percentage deviation on the screen.
A: The HZ611 connects inline into the charging line. By feeding the charging meter's electric pulse output into the HZ611's pulse input port, the internal processor runs real-time error verification loops against its own 0.01% standard matrix, instantly displaying the charging meter's exact percentage deviation on the screen.
Q: Does the equipment require a connected laptop or separate software to run automated verification paths?
A: No. While it features RJ45, RS232, and USB ports to output data or communicate with a central computer system, it functions as a true standalone field unit. The built-in 7-inch color touch display gives field engineers full manual or automatic control over measurement ranges and data logging right at the site panel.
