Technical Specifications:

• Model: UDIAG3-050N-1K D-2TB-N/CN
• Series: UDIAG3 (3rd Generation)
• Number of Channels: 50 channels (050)
• Point Capacity: 1,000 points (1K)
• Configuration: D-2TB-N
• Regional Version: /CN (China)
• Display: Monochrome LCD with backlight (128 × 64 pixels)
• Input Types: TC, RTD, mV, V, mA, pulse, contact (universal)
• Recording Media: USB flash drive (built-in slot)
• Communication: RS-232C, USB (device and host)
• Power Supply: Internal rechargeable lithium battery (8 hours continuous operation) or 100–240 V AC adapter
• Dimensions: 168 × 88 × 42 mm (W × H × D)
• Weight: Approximately 0.6 kg (with battery)
• Protection Class: IP54 (dust and splash resistant)

Functional Features:

• Simultaneous recording of up to 50 channels
• Real-time display of all channel values on LCD
• Min/Max/Average recording per channel
• Alarm setpoint with audible buzzer
• USB mass storage for data export (CSV format)
• PC connection via USB for configuration and data download
• Password protection for configuration

Performance Parameters:

• Scan Cycle: 0.5 seconds (50 channels)
• Recording Interval: 0.1 to 60 seconds
• Internal Memory: 500,000 data points
• Accuracy: ±0.2% of span (DC mA/V), ±0.3% of span (TC), ±0.2% of span (RTD)
• Battery Life: 8 hours continuous (LCD on, all 50 channels active)
• Operating Temperature: -10 °C to +50 °C

Material Composition:

• Housing: High-impact polycarbonate with rubber overmold
• Display Cover: Scratch-resistant polycarbonate lens
• Terminal Block: Nickel-plated brass screw terminals (50-pin connector)
• Battery: Lithium-ion rechargeable (3.7 V, 2,600 mAh)

Structural Features:

• Handheld portable form factor with built-in handle
• 50-pin terminal connector for multi-channel input
• Built-in kickstand for benchtop use
• USB port on the side for data transfer and charging
• Rubber protective bumper on all corners

Working Principle:
The UDIAG3 connects to up to 50 field sensors via its universal input terminal block. The internal A/D converter samples all channels at 0.5-second intervals. Data is displayed on the LCD in real time and simultaneously written to internal flash memory. At the configured recording interval, data is stored with timestamp. The USB interface allows connection to a PC for configuration, real-time monitoring, and data export in CSV format.

Advantages & Highlights:

• 50 channels in a handheld unit — unmatched portability for multi-channel logging
• 8-hour battery life enables full-day field use without external power
• Built-in LCD allows standalone operation without a PC
• China version (/CN) with Chinese language and local compliance
• USB mass storage — data can be read on any PC without special software

Applicable Industries:

• Commissioning and startup of new plants
• Temporary process monitoring during maintenance
• Energy audits and efficiency studies
• Environmental monitoring
• Equipment performance testing
• Troubleshooting and fault diagnosis

Installation Requirements:

• No panel installation required — portable handheld device
• Connect field signals to the 50-pin terminal block using appropriate cable types
• For TC/RTD inputs, use shielded twisted-pair cables
• Charge the internal battery fully before extended field use (minimum 4 hours)
• Connect to PC via USB for initial configuration and data download

Usage Precautions:

• Do not expose the unit to temperatures below -10 °C or above +50 °C
• Do not connect voltages exceeding 30 V DC or 250 V AC to any input
• Charge the battery using only the Yokogawa-supplied AC adapter
• Do not disassemble the unit — internal components are not user-serviceable
• Export data to PC before the internal memory becomes full (500,000 points)
• Store in a dry environment; the unit is splash-resistant but not submersible