Yokogawa AC1-5-S-D-R AC1 Automatic Calibration Unit 24Vdc & 120Vac

Description:

The Yokogawa AC1-5-S-D-R Automatic Calibration Unit is used in gas analysis systems for automated calibration of oxygen analyzers. Commonly installed with Yokogawa ZR-series oxygen analyzers in process plants, boilers, and industrial combustion systems. Maintenance teams and system integrators use this part for automatic calibration, improving measurement accuracy, or replacing manual calibration systems in continuous monitoring applications.

Applications:

The Yokogawa AC1 automatic calibration unit is commonly used in industrial environments where oxygen concentration must be accurately measured and maintained. It is frequently applied in combustion control systems, boilers, furnaces, and process plants to automatically supply calibration gases (zero and span) to oxygen analyzers. The unit enables scheduled or remote calibration without manual intervention, improving accuracy and reducing maintenance workload.

Technical Specifications:

• Manufacturer: Yokogawa
• Model / Part Number: AC1-5-S-D-R
• Product Type: Automatic Calibration Unit
• Calibration Type: Automatic / semi-automatic gas calibration
• Function: Supplies zero and span calibration gases via solenoid valves
• System Compatibility: Yokogawa ZR402G analyzer with ZR22G probe
• Control Method: Analyzer-controlled or timed automatic calibration
• Solenoids: Electrically actuated with manual override
• Operating Pressure: ~20 psi (max ~35 psi)
• Flow Rate: ~0.6 LPM (cal gas), ~0.8 LPM (reference air)
• Flowmeter Range: 0.15–1 LPM
• Gas Connections: 1/4" FNPT fittings
• Tubing: 1/4" copper (standard) or stainless steel option
• Power Supply: Typically 110 VAC or 24 VDC (model dependent)
• Enclosure: NEMA 4 / NEMA 4X options
• Functionality: Single-channel automatic calibration system

Common Replacements:

• Yokogawa AC4 Automatic Calibration Unit
• Yokogawa AC8 Automatic Calibration Unit
• Yokogawa IAC-24 Integral Calibration Unit