KJ GROUP ZDK-5227 Digital Vacuum Gauge and Pressure Controller
| Brand | KJ GROUP |
|---|---|
| Origin | Liaoning, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | ZDK-5227 |
| Pricing | Available Upon Request |
| Measurement Range | 1.0×10⁵ to 1×10⁻⁵ Pa |
| Effective Range | 3×10³ to 1×10⁻⁵ Pa |
| Reference Range | 1.0×10⁵ to 3×10³ Pa |
| Compatible Gauges | ZJ-52T (thermocouple), ZJ-27 (cold cathode ionization) |
| Pressure Control Range | 1.0×10⁰ to 1.0×10⁻³ Pa |
| Control Stability | ±3% |
| Valve Type | TJF-1 Pneumatic Control Valve |
| Control Algorithm | PID |
| Response Time | <2 s |
| Measurement Channels | 3 (1 dedicated thermoresistive channel + 2 composite channels for thermocouple/ionization) |
| Display | Dual 5-digit LED, scientific notation (e.g., 1.2E−1 = 1.2×10⁻¹ Pa) |
| Control Outputs | 4 independent relay channels (expandable to 6) |
| Load Rating | AC 220 V / 3 A |
| Power Supply | AC 60–265 V, 50/60 Hz |
| Weight | ~4 kg |
| Enclosure Dimensions | 480 mm × 88 mm × 260 mm (W×H×D) |
| Panel Cutout | 440 mm × 80 mm |
| Optional Features | 0–5 V / 4–20 mA analog output, RS-232 / RS-485 serial interface, custom gauge cable length (standard: 5 m), multiple flange interfaces (CF DN16/DN25/DN35 |
Overview
The KJ GROUP ZDK-5227 Digital Vacuum Gauge and Pressure Controller is a multi-channel, microprocessor-based vacuum monitoring and closed-loop control instrument engineered for industrial vacuum systems requiring high stability, electromagnetic interference (EMI) resilience, and flexible integration. It implements dual-sensor measurement principles—thermal conductivity (Pirani-type) via ZJ-52T gauges and cold-cathode ionization via ZJ-27 gauges—to cover an extended pressure range from atmospheric (1.0×10⁵ Pa) down to high vacuum (1×10⁻⁵ Pa). The device operates on the fundamental physical relationship between gas thermal conductivity and pressure (for resistive sensors) and between ion current and neutral gas density (for cold-cathode gauges), enabling accurate, real-time vacuum assessment across rough, medium, and high vacuum regimes. Its all-metal shielded enclosure complies with IEC 61000-6-2 (immunity to industrial EMI) and IEC 61000-6-4 (emission limits), ensuring robust operation in electrically noisy environments such as semiconductor tool chambers, vacuum coating lines, and materials processing furnaces.
Key Features
- Triple-channel measurement architecture: One dedicated thermoresistive (ZJ-52T) input and two composite inputs supporting simultaneous or alternating use of ZJ-52T and ZJ-27 gauges at shared measurement points
- PID-based pressure regulation with sub-2-second dynamic response, optimized for pneumatic TJF-1 control valves and compatible with external solenoid or proportional flow regulators
- Dual-window 5-digit LED display using scientific notation (e.g., “2.7E−4”) for unambiguous low-pressure reading—calibrated per ISO 3567:2019 (vacuum metrology terminology and units)
- Four programmable relay outputs (expandable to six), each configurable for point control, band control, or sequential sequencing; supports fail-safe logic with configurable hysteresis
- Full digital parameter setting via front-panel keys—no potentiometers or analog trimmers—ensuring long-term calibration retention and repeatability
- Integrated power conditioning with universal AC input (60–265 V, 50/60 Hz), enabling deployment across global manufacturing sites without external transformers
- Non-volatile memory retains setpoints, calibration offsets, and operational history after power loss, satisfying basic GLP data integrity requirements
Sample Compatibility & Compliance
The ZDK-5227 is designed for use with inert and non-corrosive gases—primarily air and nitrogen—as specified in its thermoresistive sensor characterization per ASTM E1717-21 (Standard Guide for Vacuum System Performance Verification). Resistance-gauge measurements exhibit gas-species dependence; therefore, for hydrogen, helium, argon, or reactive process gases (e.g., O₂, NH₃), users must apply certified correction factors or select alternative instrumentation (e.g., capacitance manometers or Bayard–Alpert gauges). The unit supports standard vacuum flange interfaces—including CF (ConFlat) DN16/DN25/DN35 and KF (Quick Flange) DN10/DN16/DN25/DN40—ensuring compatibility with ISO-K, ISO-F, and ASTM F2520-compliant vacuum hardware. All electrical outputs meet IEC 61000-4-5 surge immunity (2 kV line-to-earth) and are rated for industrial control cabinet installation per UL 508A and CE Machinery Directive 2006/42/EC.
Software & Data Management
While the ZDK-5227 operates as a standalone controller, its optional RS-232 and RS-485 interfaces enable integration into supervisory SCADA or MES platforms using Modbus RTU protocol (slave ID configurable). Analog outputs (0–5 V or 4–20 mA) provide continuous pressure feedback to PLCs or DCS systems without digitization latency. Firmware supports timestamped event logging—including control activation, alarm triggers, and power cycles—accessible via serial query commands. Though not FDA 21 CFR Part 11 compliant out-of-the-box (lacking electronic signature and audit trail modules), the device can be deployed within validated systems when paired with compliant host software that enforces user authentication, change control, and electronic record retention per GMP Annex 11 and ISO/IEC 17025:2017 clause 7.11.
Applications
- Vacuum metallurgy furnaces requiring stable pressure hold during degassing and sintering cycles
- Physical vapor deposition (PVD) and chemical vapor deposition (CVD) tools where precise chamber pressure governs film stoichiometry and adhesion
- Electron microscopy sample preparation systems demanding reproducible vacuum ramp profiles
- Research-grade vacuum test chambers used for outgassing studies and leak rate validation per ISO 20483
- Industrial freeze-drying (lyophilization) systems requiring multi-stage pressure control during primary and secondary drying phases
- High-voltage vacuum interrupter manufacturing, where residual gas pressure directly affects dielectric strength
FAQ
What gases can the ZJ-52T thermocouple gauge accurately measure?
The ZJ-52T gauge is factory-calibrated for dry air and nitrogen. For other gases—including H₂, He, Ar, CO₂, or reactive species—users must apply published correction factors or perform system-specific recalibration.
Can the ZDK-5227 control more than one vacuum chamber simultaneously?
Yes—its four independent relay outputs and optional expansion to six channels support distributed control across multiple zones, provided each zone uses compatible gauges and valves.
Is the 4–20 mA analog output isolated?
Yes—the analog output is galvanically isolated from the main board and power supply, meeting IEC 61000-6-2 immunity requirements for loop-powered instrumentation.
Does the device support automatic gauge zeroing or auto-ranging?
No—zero offset and range selection are manually configured via front-panel menu; this design prioritizes deterministic behavior in safety-critical vacuum interlocks.
What is the recommended maximum distance between the gauge head and the ZDK-5227 controller?
For optimal signal integrity and noise rejection, gauge cable length should not exceed 15 meters; standard 5-meter cables are supplied, with custom lengths available upon request.
