HyYan QLY-1000 Microcomputer-Based Multi-Channel Gas Flow Controller

Overview

The HyYan QLY-1000 Microcomputer-Based Multi-Channel Gas Flow Controller is an embedded industrial control system engineered for precise, synchronized sequencing of gas delivery in vacuum and low-pressure process environments. Designed specifically for applications requiring deterministic timing, repeatable valve actuation, and analog pressure feedback integration—such as plasma-enhanced chemical vapor deposition (PECVD), sputtering, reactive ion etching (RIE), and catalytic reaction studies—the QLY-1000 implements a deterministic finite-state machine architecture via its industrial microcomputer core. Unlike generic PLC-based solutions, the QLY-1000 integrates dedicated analog input (AI) and analog output (AO) circuits for real-time pressure transducer interfacing (0–5 V → 0–1000 Torr scaling), enabling closed-loop or semi-closed-loop gas flow regulation when paired with proportional pressure control valves. Its hardware-level timing resolution of 0.1 seconds ensures sub-second repeatability across all solenoid and shut-off valve operations—critical for maintaining stoichiometric gas ratios during transient plasma ignition or chamber purging cycles.

Key Features

• Industrial-grade microcomputer controller with non-volatile program storage and watchdog timer for fail-safe operation
• Full Chinese-language text LCD (240 × 128 pixels) providing real-time status display, parameter editing, and alarm logging
• Three independently programmable solenoid valves: Valve 1 supports normally-open configuration with user-defined toggle intervals (1–120 s); Valves 2 and 3 operate synchronously with adjustable on/off durations (on: 0.5–30 s; off: 1–50 s)
• Three individually addressable mechanical shut-off valves, each configurable with distinct open/close timing profiles (e.g., Valve 1: NO + 1–120 s toggle; Valves 2/3: on 1–50 s / off 1–60 s)
• Dedicated 0–5 V analog input channel for pressure transducer signal acquisition, linearly mapped to 0–1000 Torr range on display
• Dedicated 0–5 V analog output channel for driving external proportional pressure control valves (e.g., MKS 647B, VAT Type 12 series)
• Isolated check valve control circuit—enabling unidirectional flow enforcement without software dependency
• AC 220 V, 50 Hz valve drive outputs compliant with IEC 61000-4-5 surge immunity standards
• Onboard DC ±15 V / 200 mA auxiliary power supply for powering external analog sensors or valve drivers
• Aluminum alloy enclosure with electrostatic powder coating—designed for ESD-safe lab environments and thermal stability under continuous operation

Sample Compatibility & Compliance

The QLY-1000 is compatible with standard NPT 1/4″ and BSPP G1/4″ pneumatic interfaces and supports integration with common laboratory-grade solenoid valves (e.g., Parker Skinner, SMC, CKD) rated for vacuum service up to 10⁻³ mbar. It meets electromagnetic compatibility requirements per EN 61000-6-2 (immunity) and EN 61000-6-4 (emission), and complies with RoHS Directive 2011/65/EU. While not certified for hazardous area use (ATEX/IECEx), its design conforms to general-purpose laboratory equipment safety principles outlined in IEC 61010-1. The device supports audit-ready operation when deployed within GLP- or GMP-aligned workflows: all timing parameters are stored in non-volatile memory, and no runtime configuration changes occur without explicit operator input via the front-panel interface—ensuring procedural traceability.

Software & Data Management

The QLY-1000 operates as a standalone embedded controller with no external PC dependency. All operational parameters—including valve timing sequences, pressure scaling coefficients, and alarm thresholds—are configured and verified directly through the front-panel text interface. No proprietary software, drivers, or cloud connectivity are required. Configuration data is retained across power cycles via EEPROM. Although it lacks USB/Ethernet communication ports, the analog I/O channels support integration into larger SCADA or LabVIEW-based supervisory systems via third-party DAQ modules (e.g., National Instruments USB-6009). For regulated environments, the absence of network interfaces inherently satisfies FDA 21 CFR Part 11 requirements for electronic records where no electronic signatures or remote access are implemented.

Applications

• Plasma processing systems: Precise synchronization of Ar/H₂/N₂ gas pulses during PECVD, magnetron sputtering, and plasma cleaning cycles
• Vacuum chamber purge and vent sequencing: Controlled introduction of inert gases (N₂, Ar) followed by evacuation to minimize oxygen contamination
• Catalysis research reactors: Reproducible delivery of reactant gas mixtures with millisecond-scale timing fidelity
• Gas chromatography pre-concentration units: Automated switching between sampling, trapping, and desorption manifolds
• Custom gas blending stations: Integration with mass flow controllers (MFCs) and pressure regulators for multi-component gas standard generation
• Education and training platforms: Hands-on instruction in pneumatic logic, vacuum system design, and real-time embedded control principles

FAQ

Does the QLY-1000 support RS-232 or Ethernet communication?
No. It is a self-contained front-panel-operated controller with no serial or network interfaces.
Can I connect a digital pressure transmitter with 4–20 mA output?
Not directly—the analog input accepts only 0–5 V signals. A 4–20 mA to 0–5 V signal conditioner is required.
What is the maximum ambient temperature rating for continuous operation?
The unit is rated for continuous operation at ≤40 °C ambient temperature with free-air convection cooling.
Are firmware updates available?
Firmware is factory-programmed and not field-upgradable; functional enhancements require hardware revision.
Is the ±15 V auxiliary supply isolated from the main AC input?
Yes—the DC output is galvanically isolated and referenced to its own common, suitable for powering floating sensor circuits.