701275 Accelerometer & Voltage Module with AAF
The Yokogawa 701275 is a voltage and accelerometer input module for vibration and dynamic signal analysis on the ScopeCorder platform. It provides built-in sensor bias for direct connection of amplifier type accelerometers and supports 100 kS per second sampling, 16-bit resolution, and wide bandwidth measurement.
Key Features
- Voltage and Acceleration Measurement in One Module: Supports both voltage and acceleration inputs that can be switched per channel, allowing flexible use for vibration, shock, and general analog measurements.
- Wide Bandwidth, High-Resolution Acquisition: Supports DC to 40 kHz bandwidth for voltage and 0.4 Hz to 40 kHz for acceleration, with built-in anti-aliasing filters and isolated 16-bit inputs sampling at 100 kS per second for clean time- and frequency-domain analysis of vibration and transient events.
- Integrated Sensor Bias Supply: Provides built-in constant current excitation of 4 mA at 22 V, enabling direct connection of built-in amplifier type acceleration sensors without the need for an external power supply or charge amplifier.
- Broad Sensor Compatibility: Supports built-in amplifier type accelerometers from major manufacturers such as Kistler1 (Piezotron™), PCB1 (ICP™), and Endevco1 (Isotron™). High-impedance acceleration sensors can also be used with external charge converters.
1: Registered trademarks of their respective companies.
| Item | Specifications | |||||||||||||||||||||||||||||||||||||||||||||
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| Standard operating conditions | Temperature: 23 ±5 °C Humidity: 20 to 80 % RH After a 30 minute warm-up and after calibration |
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| Effective measurement range | 20 div (display range: 10 div) | |||||||||||||||||||||||||||||||||||||||||||||
| Number of input channels | 2 | |||||||||||||||||||||||||||||||||||||||||||||
| Input coupling settings | AC, DC, ACCL (acceleration), and GND | |||||||||||||||||||||||||||||||||||||||||||||
| Maximum sample rate | 100 kS/s | |||||||||||||||||||||||||||||||||||||||||||||
| Input type | Isolated unbalanced | |||||||||||||||||||||||||||||||||||||||||||||
| Frequency characteristics1 (−3 dB point when a sine wave of amplitude ±3 div is applied) | Waveform measurement mode: DC to 40 kHz Acceleration measurement mode: 0.4 Hz to 40 kHz |
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| Voltage scale setting | 5 mV/div to 10 V/div (1-2-5 steps) (when using 1:1 probe factor) Acceleration (±5 V = ×1 range): ×0.1 to ×1 to ×100 (1-2-5 steps) |
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| Maximum input voltage (at a frequency of 1 kHz or less) | 42 V (DC+ACpeak)2 | |||||||||||||||||||||||||||||||||||||||||||||
| Maximum rated voltage to ground – between input and case and between inputs (at a frequency of 1 kHz or less) | Working voltage of safety standard 42 V (DC+ACpeak) (CAT II, 30 Vrms)3 |
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| Vertical (voltage) axis accuracy DC accuracy1 | Waveform measurement mode DC accuracy: ±(0.25 % of 10 div) Acceleration measurement mode: ±(0.5 % of 10 div) at 1 kHz |
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| Input connector | BNC connector (metal type) | |||||||||||||||||||||||||||||||||||||||||||||
| Input impedance | 1 MΩ ±1 %, approx. 35 pF | |||||||||||||||||||||||||||||||||||||||||||||
| −3 dB point when AC coupled | 0.4 Hz or less (0.04 Hz or less when the 701940 is in use) (typical value4) | |||||||||||||||||||||||||||||||||||||||||||||
| Common mode rejection ratio | 80 dB (50/60 Hz) or more (typical value4) | |||||||||||||||||||||||||||||||||||||||||||||
| Residual noise level (input section shorted) | ±100 µV or ±0.01 div whichever is greater (typical value4) | |||||||||||||||||||||||||||||||||||||||||||||
| A/D converter resolution | 16 bits (2400 LSB/div) | |||||||||||||||||||||||||||||||||||||||||||||
| Temperature coefficient | When in waveform measurement mode (excluding AUTO filter) Zero point: ±(0.02 % of 10 div)/°C (typical value4) Gain: ±0.02%/°C (typical value4) |
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| Bandwidth limit | Select from Full, Auto, 4 kHz, 400 Hz, 40 Hz Cutoff characteristics: –12 dB/OCT (typical value,4 setting other than AUTO) Cutoff frequency (fc) when set to AUTO
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| Probe attenuation settings | Voltage probe: 1:1, 2:1, 5:1, 10:1, 20:1, 50:1, 100:1, 200:1, 500:1, 1000:1, 2000:1, 5000:1, 10 k:1, 20 k:1, 50 k:1 Current probe: 0.1 A:1 V, 0.2 A:1 V, 0.5 A:1 V, 1 A:1 V, 2 A:1 V, 5 A:1 V, 10 A:1 V, 20 A:1 V, 50 A:1 V, 100 A:1 V, 200 A:1 V, 250 A:1 V, 400 A:1 V, 500 A:1 V, 1 kA:1 V, 2 kA:1 V, 5 kA:1 V, 10 kA:1 V, 20 kA:1 V, 50 kA:1 V |
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| Compliant voltage probe | 701940 (17 to 46 pF) | |||||||||||||||||||||||||||||||||||||||||||||
| Sensor supply current (voltage) | OFF/4 mA ±10 % (approx. 22 VDC) | |||||||||||||||||||||||||||||||||||||||||||||
| Applicable acceleration sensor | Built-in amplifier type Kistler Instrument Corporation: Piezotron, PCB Piezotronics Incorporated: ICP, ENDEVCO Corporation: ISOTRON, etc. |
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| Table of cutoff frequency characteristics of the anti-aliasing filter (AAF) | When the filter is set to Auto, the anti-aliasing filter and low-pass filter are automatically set according to the sample rate.
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| Wiring / measurement points |
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1. Value measured under standard operating conditions.
4. Typical values represent typical or average values. They are not strictly warranted.
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