SEC-Z522 HORIBA STEC SEC-Z500X High-Accuracy Mass Flow Controller

HORIBA STEC SEC-Z522 | Medium-Flow Precision Control Platform

The SEC-Z522 is a medium-flow Mass Flow Controller (MFC) from the HORIBA STEC SEC-Z500X Digital/Analog Series. It regulates process gas delivery through precision flow measurement and piezoelectric valve control.

Its specified full-scale range covers 22 to 50 SLM, based on nitrogen-equivalent flow and the applicable MR/MG #6.5–#08 configurations. The controller supports multi-gas and multi-range operation for semiconductor process equipment.

The design combines analog setpoint control with digital RS-485 F-Net communication. Its response time reaches T98 within one second across the specified full-flow range. This performance supports process sequences that require controlled gas delivery and repeatable flow transitions.

The standard configuration uses an unheated construction and SUS316L wetted surfaces. A 1/4-inch VCR male connection supports integration into compatible high-purity gas delivery assemblies.

01 | Performance Profile and Flow Accuracy

The SEC-Z522 provides a 2–100% FS control range. Its accuracy specification uses separate limits for higher-flow and lower-flow operating regions.

Performance Parameter	Specification
Manufacturer	HORIBA STEC
Model	SEC-Z522
Product Series	SEC-Z500X Digital/Analog
Product Type	Mass Flow Controller (MFC)
Full-Scale Flow Range	22–50 SLM
Reference Gas	N2 equivalent
Applicable Configuration	MR/MG #6.5–#08
Accuracy Above 25% FS	±1.0% S.P.
Accuracy At or Below 25% FS	±0.25% FS
Repeatability	±0.2% FS
Linearity	±0.5% FS
Response Time	≤1 second (T98)
Control Range	2–100% FS

Engineering Interpretation: Accuracy depends on the operating point. Above 25% FS, the specification references setpoint percentage. At or below 25% FS, it references full scale. Engineers should use the correct reference when calculating allowable flow deviation.

02 | Gas Compatibility and Process Conditions

This controller supports multiple process gases and corresponding flow-range configurations. Gas selection must match the calibrated instrument specification.

Specified gas examples:

• Nitrogen (N2)
• Argon (Ar)
• Hydrogen (H2)
• Helium (He)
• Sulfur Hexafluoride (SF6)
• Hydrogen Bromide (HBr)
• Tungsten Hexafluoride (WF6)

Process Parameter	Specification
Operating Differential Pressure	200–300 kPa(d)
Maximum Operating Pressure	450 kPa(g)
Pressure Resistance	1000 kPa(g)
Operating Temperature	5–50°C
Recommended Temperature	15–45°C
Heated Configuration	Unheated standard version

Gas Selection Note: N2-equivalent flow does not establish identical calibration for every gas. Confirm the actual gas, full-scale range, and factory calibration before installation.

03 | Valve Technology and Wetted Construction

The SEC-Z522 uses a piezoelectric actuator for proportional valve control. The available valve configuration includes normally open and normally closed options.

Component	Construction or Configuration
Valve Actuator	Piezoelectric
Valve Configuration	Normally open or normally closed
Wetted Material	SUS316L stainless steel
Internal Surface	Polished inner surface, standard
Seal Options	Metal or elastomer
Standard Thermal Configuration	Unheated
Leak Integrity	≤5 × 10⁻¹² Pa·m³/s (He)

The polished SUS316L flow path supports high-purity gas handling requirements. Seal selection requires careful review of gas chemistry, operating pressure, and process compatibility.

04 | Electrical Interface and Communication Architecture

The instrument supports both analog signal integration and digital communication. Engineers can select the appropriate interface according to the host controller and equipment architecture.

Electrical Parameter	Specification
Analog Setpoint	0.1–5 VDC
Analog Output	0–5 VDC
Digital Interface	RS-485
Communication Protocol	F-Net
Communication Speed	38,400 bps
Connector Interfaces	D-Sub 9-pin and RJ-45
Positive Supply	+15 VDC ±5%, 150 mA
Negative Supply	-15 VDC ±5%, 150 mA

Integration Considerations:

• Verify analog output compatibility with the host controller input.
• Check the analog setpoint range before connecting the control signal.
• Confirm RS-485 wiring polarity and F-Net communication settings.
• Verify connector pin assignments against the applicable wiring documentation.
• Check positive and negative supply rails under operating conditions.

05 | Mechanical Envelope and Process Connection

The compact body supports installation in semiconductor gas distribution equipment. Its extended fitting distance requires attention during manifold and piping layout design.

Mechanical Parameter	Specification
Height	126 mm
Width	64 mm
Thickness	29 mm
Overall Dimensions	126 × 64 × 29 mm (H × W × T)
Process Connection	1/4-inch VCR male
Fitting Distance	124 mm

Check the available installation space before selecting the mounting position. Confirm fitting alignment and connection clearance during gas panel design.

06 | Semiconductor Process Applications

The HORIBA STEC SEC-Z522 addresses medium-flow gas delivery requirements in semiconductor manufacturing equipment.

• Chemical Vapor Deposition (CVD): Regulates process gas delivery according to equipment recipes.
• Etching Systems: Controls compatible process gases during defined etching sequences.
• Bulk Gas Panels: Supports controlled distribution of selected process gases.
• Gas Delivery Assemblies: Provides analog and digital interfaces for equipment integration.
• Multi-Gas Processes: Supports specified gas configurations when calibration and material compatibility are confirmed.

07 | Installation and Commissioning Checklist

Correct installation requires coordinated mechanical, electrical, and gas-system checks.

1. Verify the complete model number and calibrated gas configuration.
2. Confirm the required full-scale flow range.
3. Check upstream and downstream pressure conditions.
4. Inspect the SUS316L wetted surfaces and specified seal configuration.
5. Verify 1/4-inch VCR male connection compatibility.
6. Confirm the available 124 mm fitting distance.
7. Connect the required ±15 VDC power supplies.
8. Check analog signal wiring or RS-485 communication settings.
9. Introduce the specified process gas under approved operating conditions.
10. Verify flow response and setpoint tracking before production operation.

Use suitable high-purity gas handling procedures during installation. Follow the equipment manufacturer's instructions for leak testing and process-line purging.

08 | Maintenance and Troubleshooting Considerations

Routine maintenance should focus on flow stability, gas compatibility, electrical integrity, and process-line cleanliness.

• Flow deviation: Check actual gas selection, pressure conditions, and calibration configuration.
• Slow response: Inspect supply stability, process pressure, and communication settings.
• Unstable readings: Check grounding, signal wiring, gas supply fluctuations, and electrical noise.
• Communication failure: Verify RS-485 polarity, baud rate, F-Net settings, and connector condition.
• Leak concerns: Inspect VCR connections and compatible sealing components using approved procedures.
• Temperature variation: Maintain the recommended 15–45°C environment whenever practical.

Do not change gas calibration or valve configuration without confirming the applicable manufacturer specifications.

09 | Compliance and Product Standards

• RoHS: RoHS compliant.
• Industry Standards: SEMI standards.

Specific SEMI standard numbers and individual certification references were not provided. Confirm the applicable compliance documents for the intended equipment and installation.

10 | Frequently Asked Questions

Q1: How does the 2–100% FS control range affect process recipe configuration?

The specified range defines the available control span relative to the configured full-scale value. Recipe engineers should check the minimum operating setpoint against the required process flow. Avoid assuming that every gas configuration provides identical usable flow limits.

Q2: Why should engineers verify the seal material before introducing HBr or WF6?

Gas chemistry can affect sealing materials and long-term leak integrity. Confirm chemical compatibility for the selected metal or elastomer seal. Also review moisture exposure and the approved gas handling procedure before commissioning.

Q3: What could cause a flow deviation after replacing an existing controller?

Common investigation points include an incorrect gas calibration, mismatched full-scale range, different pressure conditions, and signal scaling errors. Compare the replacement configuration with the original instrument records before changing process parameters.

Q4: When should an engineer choose RS-485 instead of analog control?

RS-485 suits equipment architectures that require digital communication through F-Net. Analog control suits systems with compatible voltage-based setpoint and feedback interfaces. Check the host controller architecture and communication requirements before selecting the connection method.

Q5: What practical checks help prevent installation problems in a semiconductor gas panel?

Review fitting clearance, VCR alignment, gas purity, pressure differential, and electrical connector access. Confirm the 124 mm fitting distance during mechanical design. Also verify the selected gas calibration and valve configuration before introducing process gases.

11 | Procurement and Technical Support

Global PLC Spare HUB supports industrial automation and semiconductor process equipment spare-part sourcing.

• Model Verification: Assistance with part number and configuration identification.
• Technical Support: Help reviewing flow range, gas selection, and interface specifications.
• Warranty: 12-month warranty coverage.
• Shipping: DHL, FedEx, and UPS international shipping options.
• Order Processing: Typically 24–48 hours after order confirmation.

Contact our team for pricing, availability, and technical assistance regarding the HORIBA STEC SEC-Z522 SEC-Z500X Mass Flow Controller.

Tags