YOKOGAWA ZR402G-T-E-E-A/HS/SCT Separate Type Zirconia Oxygen Analyzer, Converter

Overview

The Yokogawa ZR402G-T-E-E-A/HS/SCT is a separate-type zirconia oxygen analyzer designed for high-precision oxygen concentration measurement in industrial processes. Equipped with an LCD touchscreen, multiple output signals, and automatic calibration functionality, it ensures accurate and reliable operation. The unit is ruggedly built with NEMA 4X/IP66 protection, making it suitable for harsh industrial environments.

Key Features

• User Interface:

  • LCD touchscreen (320 × 240 dots)

  • Status indicators for alarms, calibration, and errors

• Measurement Range:

  • 0 to 100 vol% O₂ (adjustable in 1 vol% increments)

  • Linear or logarithmic 4–20 mA output

• Outputs & Signals:

  • Analog Output: 4 to 20 mA DC (max load 550 Ω)

  • Digital Output: HART communication (min load 250 Ω)

  • Contact Outputs: 4 points (high/low alarms, maintenance, calibration, etc.)

  • Contact Inputs: 2 points (external calibration start, process alarm, etc.)

• Calibration Functions:

  • Automatic, semi-automatic, or manual calibration

  • Supports ZR40H Automatic Calibration Unit

  • Zero/span gas calibration

• Environmental & Installation:

  • Operating Temperature: -20°C to +55°C

  • Storage Temperature: -30°C to +70°C

  • Humidity: 0 to 95% RH (non-condensing)

  • Ingress Protection: NEMA 4X/IP66 (fully sealed)

  • Power Supply: 100–240V AC, 50/60Hz

  • Power Consumption: Max 300W (approx. 100W for normal use)

  • Mounting: Panel, wall, or 2-inch pipe

  • Case Material: Aluminum alloy, corrosion-resistant polyurethane coating

  • Weight: Approx. 6 kg

Functional Capabilities

Display & Data Monitoring

• Real-time oxygen concentration monitoring

• Graphical trend display of O₂ levels

• Diagnostic messages for maintenance and calibration

• Historical data storage (oxygen concentration, cell temperature, etc.)

• Self-diagnosis system for abnormal cell conditions, calibration errors, or faulty components

Calibration Options

• Automatic Calibration: Scheduled calibration with ZR40H Automatic Calibration Unit

• Semi-Automatic Calibration: Initiated via touchscreen or external input

• Manual Calibration: User-controlled gas flow and calibration adjustments

Alarms & Safety Functions

• High/low oxygen level alarms

• Maintenance & calibration alerts

• Process alarm (turns off heater power if triggered)

• Contact output delay (0-255 sec) and hysteresis settings (0-9.9 vol% O₂)

Communication & Wiring

• Analog Output: 2 × 4–20 mA DC (one with HART)

• Contact Output: 4 configurable relays (alarm, calibration, maintenance, etc.)

• Contact Input: 2 configurable inputs (range switching, external calibration start, etc.)

• Wiring Connections: G1/2, Pg13.5, M20 × 1.5, 1/2NPT (8 holes)

• Maximum Detector-Converter Distance: 300m (with 1.25mm² cable)

Model & Code Breakdown

• Model: ZR402G – Separate Type Zirconia Oxygen Analyzer, Converter

• Thread Type: -T (1/2 NPT)

• Display Language: -E (English)

• Instruction Manual: -E (English)

• Option Codes:

  • /HS – Set for Humidity Analyzer

  • /SCT – Stainless steel tag plate

Applications

The Yokogawa ZR402G-T-E-E-A/HS/SCT is designed for precise oxygen measurement in industrial processes, including:

• Power plants

• Petrochemical and chemical industries

• Metallurgy & heat treatment

• Combustion control systems

• Flue gas and emissions monitoring

With advanced self-diagnosis, flexible calibration options, and multiple output signals, the ZR402G-T-E-E-A/HS/SCT ensures accurate, reliable, and efficient oxygen level monitoring in demanding industrial environments.