Technical Specifications:

• Product Series: DX2000 Series
• Model Number: DX220-3-2/A
• Number of Channels: 3 channels
• Number of Pens: 2 pens (dual-pen simultaneous recording)
• Recording Speed: 25 mm/hour, 50 mm/hour, 100 mm/hour (selectable)
• Chart Width: 100 mm (standard)
• Input Signals: DC 1–5V, DC 0–10V, 4–20mA, Thermocouple (TC), RTD (Pt100, JPt100, Cu50)
• Accuracy: ±0.5% of full scale
• Power Supply: 100–240 VAC, 50/60 Hz
• Paper Size: B4 (257 × 364 mm) or A4 (210 × 297 mm)
• Dimensions: Approximately 264 × 264 × 260 mm (W×H×D)
• Weight: Approximately 8.5 kg
• Alarm Outputs: 4 alarm outputs (contact outputs)

Functional Features:

• Dual-pen recording — 2 pens record simultaneously on the same chart for different variables
• Alarm recording with dedicated alarm markers on chart
• Event recording capability with timestamp
• Trend display on front panel LED/LCD
• Universal input accepts multiple signal types without hardware change
• Roll paper or cut sheet operation modes
• Batch recording function for production lot tracking
• Communication: RS-232C, RS-485 (optional)

Performance Parameters:

• Response Time: Less than 1 second (typical)
• Recording Accuracy: ±0.5% FS
• Alarm Output Rating: 250 VAC, 2A (resistive load)
• Chart Feed: Motor-driven with adjustable speed (25/50/100 mm/hour)
• Pen Drive Resolution: 0.1 mm minimum step

Material Composition:

• Housing: Flame-retardant ABS resin (front panel), Steel plate (SPCC) (chassis)
• Chart Cover: Transparent polycarbonate with UV protection
• Pen Arms: Stainless steel (SUS304) with phosphor bronze drive mechanism
• Chart Paper Roller: Aluminum alloy core

Structural Features:

• Wall-mount or panel-mount design with hinged front cover
• Front-loading chart paper mechanism
• Two independent pen arms with separate drive motors
• Large front panel display with digital readout
• Key lock for parameter protection
• Alarm LED indicators on front panel

Working Principle: The DX220 receives analog input signals from field transmitters. The signals are A/D converted internally, scaled to engineering units, and sent to the pen drive mechanisms. The two pen arms move independently across the chart paper, plotting the process variable values against time. The chart paper advances at a constant speed driven by a synchronous motor, creating a time-based record. Alarm conditions trigger dedicated alarm markers on the chart.

Advantage Highlights:

• Reliable hard-copy record for regulatory compliance (FDA, EPA, etc.)
• Dual-pen capability reduces paper usage by 50%
• Wide range of input signal compatibility — one device for multiple signal types
• Long-term data retention on physical chart paper (no digital obsolescence)
• Simple operation with minimal training required

Applicable Industries:

• Chemical Plants
• Pharmaceutical Manufacturing
• Food & Beverage
• Water Treatment
• Power Plants
• Pulp & Paper Mills
• Steel & Metals

Model Series:

• DX2000 Series: DX200, DX210, DX220, DX230, DX240, DX250, DX260, DX270
• Channel Variants: 1, 2, 3, 4, 6, 8, 12, 16 channels
• Pen Variants: 1-pen, 2-pen, 4-pen, 6-pen, 8-pen, 12-pen configurations
• Suffix Options: /A, /B, /C, /D (different output/alarm configurations)

Installation Requirements:

• Panel cutout: 256 × 256 mm (W×H)
• Mounting: Panel mounting with 4 screws (M4)
• Ambient temperature: 0°C to +50°C
• Relative humidity: 30% to 85% RH (no condensation)
• Vibration: Within IEC 60068-2-6 limits
• Clearance: Minimum 100 mm above for ventilation
• Power: Dedicated 100–240 VAC circuit recommended

Usage Precautions:

• Use only Yokogawa recommended chart paper (B4 or A4)
• Calibrate pens regularly for recording accuracy
• Replace pen ink before complete depletion
• Clean pen tips periodically to prevent smearing
• Do not operate in explosive atmospheres unless ATEX-rated variant is used
• Backup critical data digitally if long-term retention is required
• Service motor mechanism per maintenance schedule