HUANKONG GHK-7200 Portable Multi-Function Calibrator
| Brand | HUANKONG |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | OEM/ODM Manufacturer |
| Country of Origin | China |
| Model | GHK-7200 |
| Pricing | Available Upon Request |
| Flow Measurement Methods | Orifice Flowmeter, Soap Film Flowmeter, Roots Flowmeter |
| Pressure Measurement | Micro-pressure & Gauge Pressure (Auto-Pressurization) |
| Temperature Calibration | Flue Gas Temperature (Up to 200 °C) |
| Flow Display Modes | Actual Condition Flow & Standard Condition Flow (NTP: 20 °C, 101.325 kPa) |
| Power Supply | Rechargeable Lithium Battery (≥6 h Continuous Operation) |
| Data Handling | Internal Storage, Query Function, USB Flash Drive Export |
| Compliance Standards | JJG 586–2006, HJ/T 368–2007 |
Overview
The HUANKONG GHK-7200 Portable Multi-Function Calibrator is an integrated field-deployable calibration platform engineered for traceable flow and temperature verification across environmental monitoring instrumentation. It operates on three complementary volumetric flow measurement principles—critical orifice flow, soap film displacement, and positive displacement (Roots-type)—each selected and applied according to the target instrument’s operational range, uncertainty requirements, and regulatory context. The device supports both actual-condition (wet, ambient T/P) and standard-condition (dry, 20 °C, 101.325 kPa) flow reporting, enabling direct compliance with Chinese environmental monitoring protocols that mandate standardized volumetric correction per HJ/T 374–2019 and HJ 194–2017. Its micro-pressure generation and sensing subsystem enables in-situ calibration of differential pressure transducers used in isokinetic sampling systems, while the flue gas temperature probe (±0.5 °C accuracy, 0–200 °C range) satisfies thermal validation requirements for particulate and gaseous emission testing per GB/T 16157–1996.
Key Features
- Modular flow calibration architecture: Interchangeable orifice plates (for medium- and high-flow particulate samplers), calibrated soap film modules (with selectable volume ranges: 10–1000 mL), and a precision Roots flowmeter (0.5–100 L/min) allow application-specific configuration without hardware modification.
- Integrated pressure control: Programmable micro-pressure generation (±1 kPa resolution) and dual-range gauge pressure measurement (0–10 kPa / 0–100 kPa) support leak testing, pump characterization, and pressure sensor calibration in accordance with JJG 586–2006 Annex B.
- Real-time thermobaric compensation: Onboard temperature and absolute pressure sensors automatically correct volumetric flow readings to standard conditions using the ideal gas law, eliminating manual calculation errors and ensuring consistency with HJ/T 368–2007 reporting conventions.
- Field-optimized power and data management: A sealed Li-ion battery pack delivers ≥6 hours of continuous operation under mixed-mode usage (flow + pressure + temperature). Battery level is displayed as percentage with low-power warning; all calibration sessions are timestamped and stored internally (≥10,000 records).
- Regulatory-grade data integrity: USB mass-storage mode enables direct export of CSV-formatted calibration logs—including raw sensor values, corrected flows, operator ID, and environmental metadata—to external drives for audit-ready archiving and LIMS integration.
Sample Compatibility & Compliance
The GHK-7200 is validated for calibration of EPA Method 5, Method 17, and ISO 9096-compliant instruments, including but not limited to: gravimetric PM10/PM2.5 samplers (e.g., TEOM, Beta Attenuation Monitors), portable VOC analyzers (PID/FID-based), flue gas CEMS extractive probes, and isokinetic stack sampling trains. Its orifice flow modules meet the dimensional tolerances and Reynolds number criteria specified in HJ/T 368–2007 for orifice coefficient certification. The soap film subsystem adheres to JJG 586–2006 repeatability limits (≤0.5% RSD at 1 L/min) and linearity deviation thresholds (±1.0% FS). All firmware and calibration algorithms are version-controlled and support GLP-compliant audit trails when paired with optional PC software.
Software & Data Management
The GHK-7200 operates standalone but interfaces with HUANKONG’s CaliSuite™ PC application (Windows 10/11) via USB-C. CaliSuite enables report generation compliant with CNAS-CL01:2018 documentation requirements, including uncertainty budgets per GUM (JCGM 100:2008), certificate templates aligned with ISO/IEC 17025 Clause 7.8.2, and electronic signature fields for QA/QC approval. Raw data exports include full sensor time-series (10 Hz sampling), environmental compensation parameters, and user-defined calibration IDs—structured to facilitate import into ELN systems or statistical process control platforms. Firmware updates preserve calibration constants and do not require re-certification unless hardware revision changes occur.
Applications
- Environmental monitoring agencies performing quarterly field verification of ambient air quality samplers (e.g., SKC, Thermo Fisher, SIBATA units) per HJ 618–2011.
- Third-party testing laboratories conducting stack emission audits under China’s “Blue Sky Defense Campaign” enforcement framework.
- OEM service teams calibrating multi-parameter flue gas analyzers (O2, SO2, NOx, CO) prior to deployment at thermal power plants and cement kilns.
- Occupational hygiene labs validating personal sampling pumps (e.g., Gilian, Sensidyne) used in workplace exposure assessments per GBZ/T 192 series standards.
- Research institutions developing new aerosol sampling methodologies requiring NIST-traceable flow references at variable temperature and humidity conditions.
FAQ
Does the GHK-7200 require annual recalibration by an accredited lab?
Yes. While the unit ships with factory calibration certificates traceable to NIM (National Institute of Metrology, China), ISO/IEC 17025-accredited recalibration every 12 months—or after any impact event or firmware update—is recommended to maintain metrological validity.
Can the soap film module be used for low-flow applications below 10 mL/min?
No. The standard soap film configuration is rated for 10–1000 mL/min. For sub-10 mL/min verification (e.g., passive diffusion samplers), users must specify the optional ultra-low-flow kit (GHK-7200-ULF) at time of order.
Is the pressure generation system compatible with negative pressure (vacuum) calibration?
Yes. The built-in diaphragm pump supports bidirectional pressure control from –10 kPa to +100 kPa, enabling verification of vacuum gauges and suction-side flow meters.
How is traceability documented for international clients outside China?
Each unit includes a bilingual (CN/EN) calibration certificate listing measurement uncertainties, reference standards used (e.g., NIM-certified primary flow standards), and GUM-based uncertainty budgets. Upon request, HUANKONG provides ISO 17025 test reports issued by CNAS-accredited partner labs.
Does the device support Bluetooth or Wi-Fi data transmission?
No. To ensure electromagnetic compatibility in industrial stack environments and prevent data interception risks, only wired USB-C communication is implemented. Wireless functionality is intentionally omitted per IEC 61326-1:2013 EMC requirements for field calibration equipment.
