The Yokogawa 701265 is a high-precision temperature and voltage input module for advanced data acquisition systems. It provides dual-mode measurement capability across two isolated channels: thermocouple-based temperature sensing or DC voltage acquisition. The module delivers exceptional accuracy and low-noise performance, making it essential for industrial, laboratory, and research applications demanding precise analog signal capture.
Technical Specifications
Input Architecture
• 2 isolated unbalanced channels
• Binding post connectors with TC, DC, and GND coupling
• Approximately 1 MΩ input impedance
Voltage Measurement
• Range: 1 mV to 100 V (1-2-5 steps)
• Accuracy: ±(0.08% of range + 2 μV)
• Sample rate: 100 kS/s
• Frequency response: DC to 100 Hz (-3 dB point)
• Maximum input voltage: 42 V (DC + ACpeak) at ≤1 kHz
• Common Mode Rejection Ratio: ≥80 dB typical at 50/60 Hz
Temperature Measurement
• Thermocouple types: K, E, J, T, L, U, N, R, S, B, W, iron-doped gold/chromel
• Resolution: 0.1°C
• Sensitivity: 0.1 mV/Div
• Noise: ±4 μV typical
• Data update rate: 500 Hz
• Frequency response: DC to 100 Hz (-3 dB point)
• Maximum input voltage: 42 V (DC + ACpeak) at ≤1 kHz
• Maximum common mode voltage: 42 V (DC + ACpeak) CAT I/II, 30 Vrms
• Common Mode Rejection Ratio: ≥120 dB typical at 50/60 Hz (2-Hz filter ON, source resistance ≤500 Ω)
Response Time (RMS Observation)
• Rising (0 to 90% full scale): 100 ms typical
• Falling (100 to 10% full scale): 250 ms typical
– Key Features
• Switchable temperature/voltage functionality eliminates need for multiple modules
• Channel isolation enables independent measurement of floating signals
• Extensive thermocouple support covers industrial and research requirements
• Low-noise front end (±4 μV) ensures signal integrity in sensitive measurements
• High CMRR performance rejects common-mode interference
– Typical Applications
Thermal monitoring in process control, multi-point temperature profiling, voltage acquisition in low-level signal environments, data logging in laboratory settings, industrial machinery diagnostics.
– Compatibility & Integration
Designed for Yokogawa Data Acquisition Systems including DL850/DL850V, DL350 ScopeCorder, and DL950 ScopeCorder platforms.
