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Type 4447 complies with the following national and international standards:
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. ISO8041:2005: Human response to Vibration. Measuring Instrumentation
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. ISO5349.1:2001: Mechanical Vibration. Measurement and Evaluation of Human Exposure to Hand-transmitted Vibration.
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Part 1: General Requirements
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. ISO5349 .2:2001: Mechanical Vibration. Measurement and Evaluation of Human Exposure to Hand-transmitted Vibration .
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Part 2: Practical Guidance for Measurement at the Workplace
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. ISO2631.1:1997: Mechanical Vibration and Shock. Evaluation of Human Exposure to Whole-body Vibration. Part 1: General
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Requirements
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. EUDirective 2002/44/EC
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SHOCK LIMITS
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Max. Shock level for recommended transducers (± peak): 50 km/s2
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BATTERY
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Rechargeable Li-ion battery 3.7 V, 2600 mA. Up to 4 h continuous use at room temperature after more than 6 h charging with the supplied charger, ZG-0459
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Note 1: If the instrument is operated at low temperatures, the operational time is reduced
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Note 2: External Charger (ZG-0459) is not recommended for use during measurements as it may introduce noise
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CLOCK
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Real-time clock and time-stamped measurements
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INPUT CHANNELS
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Type 4447 has 3 and 1 analogue input channels and a USB digital I/O.
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The inputs are designed for triaxial and/or single-axis accelerometers and are equipped with selectable CCLD power supplies. Input channel sensitivity is designed for typical transducers used in human vibration measurements
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CABLES
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The maximum accepted accelerometer cable length is 3m (9.84 ft)
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DETECTOR
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Simultaneous measurement of weighted RMS, VDV, MTVV and Peak vibration value for each channel
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FREQUENCY WEIGHTING
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Filters for frequency weightings conform to ISO 8041:2005, including filters Wh, Wd, Wk, and Wm
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DISPLAY
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Color graphical display with a resolution of 124 ×124 pixels
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Basic information regarding the instrument status is shown through icons, including:
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Battery indicator
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Measurement status: Measure, Pause, Stop
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Channel status
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Overload (O)
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Under-range (U)
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Elapsed time: hh:mm:ss
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CALIBRATION
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Calibration Check Vibration Value: 10 m/s2 (3.16m/s2 for high sensitivity accelerometers . positions 5 and 10)
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Calibration Check Frequency: 159.2Hz
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Electrical Calibration Check Voltage: 100mV for Type 4515-B-002 and 10 mV for Type 4520
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PHYSICAL DIMENSIONS
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Size: 70 × 135 × 28 mm (2.7 × 5.3 × 1.1 in)
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Weight: 260 g (9.2 oz.), battery included
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