JF-2310 Online Gas Proportioning Pump

Overview

The JF-2310 Online Gas Proportioning Pump is a microprocessor-controlled, fixed-mount gas dilution system engineered for high-accuracy dynamic gas mixing in environmental monitoring, calibration laboratories, and industrial process validation. It operates on a time-sliced gas sampling principle: high-speed three-way solenoid valves—sequenced by an embedded real-time controller—precisely meter discrete pulses of primary standard gas and zero or balance gas (e.g., N₂ or synthetic air), then homogenize the streams via turbulent mixing in a static mixer chamber. This architecture avoids mechanical flow restrictors or thermal mass flow controllers, eliminating drift associated with pressure/temperature dependency and enabling stable long-term output without recalibration. Designed for continuous operation over 8,000 hours per year, the JF-2310 delivers traceable, repeatable gas mixtures critical for calibrating fixed gas detectors (e.g., electrochemical, PID, IR sensors), validating CEMS (Continuous Emission Monitoring Systems), and preparing reference standards compliant with ISO 6142, ISO 6145, and EPA Method 205.

Key Features

• Microprocessor-driven proportional control with 16-bit DAC resolution for precise valve timing and ratio definition
• No moving parts in the gas path—solenoid valves rated for >10 million cycles ensure maintenance-free operation
• Real-time digital display showing setpoint ratio, actual output concentration (calculated from source gas certificate), flow rate, and system status flags
• Front-panel keypad interface supporting direct entry of target concentration (ppm or % v/v) without external software
• Integrated pressure regulation and flow stabilization to maintain constant output across inlet pressure fluctuations (3–10 bar input range)
• Leak-tight stainless-steel gas manifold with EPDM-sealed fittings; compatible with non-corrosive gases including CO, NO, SO₂, CH₄, O₂, and VOCs (excluding H₂S, Cl₂, NH₃ without optional corrosion-resistant upgrade)
• EMC-compliant design meeting IEC 61326-1 for laboratory and industrial environments

Sample Compatibility & Compliance

The JF-2310 supports binary gas mixing only: one certified standard gas cylinder (e.g., 1,000 ppm CO in N₂) and one balance gas cylinder (zero air or N₂). It is not suitable for reactive, condensable, or particulate-laden streams. All wetted materials conform to ASTM F519 and USP Class VI requirements. The system meets ISO/IEC 17025 traceability requirements when used with NIST-traceable source gases and documented calibration records. Output stability (<±0.5% over 24 h) satisfies GLP and EPA PS-1/PS-2 verification protocols for calibration gas generators. Optional RS-485 Modbus RTU interface enables integration into SCADA systems for remote monitoring and audit trail logging.

Software & Data Management

While fully functional as a stand-alone instrument, the JF-2310 optionally supports PC-based configuration via USB-to-serial adapter and proprietary Windows application (v3.2+). The software enables batch recipe storage (up to 100 profiles), automated sequence execution, timestamped event logging (valve actuation, error codes, power cycles), and export of CSV-formatted calibration logs. Audit trail functionality complies with FDA 21 CFR Part 11 requirements when paired with user access controls and electronic signatures. All internal firmware updates are performed via secure signed HEX files; no internet connectivity is required during operation.

Applications

• Primary standard generation for calibrating fixed toxic gas monitors in wastewater treatment plants and semiconductor cleanrooms
• Dynamic span gas preparation for CEMS analyzers in coal-fired power stations (per EN 15267-3 and EPA Performance Specification 2)
• Method validation support for ASTM D6522 (NOₓ analysis) and ISO 12039 (SO₂ measurement)
• Research-grade gas mixture synthesis in atmospheric chemistry labs studying oxidation kinetics or sensor cross-sensitivity
• Quality assurance of gas detection equipment prior to field deployment under ISO 45001 occupational safety frameworks

FAQ

Can the JF-2310 mix more than two gases simultaneously?

No—it is a binary proportioning system. Ternary or multi-gas mixing requires cascaded units or a dedicated multi-channel dilutor.
Is it possible to validate the output concentration without a reference analyzer?

Yes. Traceability is established through certified source gases and documented valve timing algorithms; however, periodic verification using a calibrated FTIR or GC-PID is recommended per ISO/IEC 17025 clause 7.7.
Does the unit require annual recalibration?

No scheduled recalibration is mandated. Performance verification (linearity, repeatability, zero drift) should be conducted semiannually using certified test gases and logged per internal QA procedures.
What certifications does the JF-2310 hold for use in hazardous areas?

It is rated for general-purpose indoor use (IP20). For Zone 2/Class I Div 2 environments, an ATEX/IECEx-certified enclosure upgrade kit must be specified at time of order.
Can the output flow rate be adjusted while maintaining ratio accuracy?

Yes—the flow rate is independently adjustable within 0.5–1.0 L/min without affecting mixing ratio fidelity, thanks to active flow compensation logic in the microcontroller firmware.