Type 4447 complies with the following national and international standards:

. ISO8041:2005: Human response to Vibration. Measuring Instrumentation

. ISO5349.1:2001: Mechanical Vibration. Measurement and Evaluation of Human Exposure to Hand-transmitted Vibration.

Part 1: General Requirements

. ISO5349 .2:2001: Mechanical Vibration. Measurement and Evaluation of Human Exposure to Hand-transmitted Vibration .

Part 2: Practical Guidance for Measurement at the Workplace

. ISO2631.1:1997: Mechanical Vibration and Shock. Evaluation of Human Exposure to Whole-body Vibration. Part 1: General

Requirements

. EUDirective 2002/44/EC

SHOCK LIMITS

Max. Shock level for recommended transducers (± peak): 50 km/s2

BATTERY

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

Note 1: If the instrument is operated at low temperatures, the operational time is reduced

Note 2: External Charger (ZG-0459) is not recommended for use during measurements as it may introduce noise

CLOCK

Real-time clock and time-stamped measurements

INPUT CHANNELS

Type 4447 has 3 and 1 analogue input channels and a USB digital I/O.

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

CABLES

The maximum accepted accelerometer cable length is 3m (9.84 ft)

DETECTOR

Simultaneous measurement of weighted RMS, VDV, MTVV and Peak vibration value for each channel

FREQUENCY WEIGHTING

Filters for frequency weightings conform to ISO 8041:2005, including filters Wh, Wd, Wk, and Wm

DISPLAY

Color graphical display with a resolution of 124 ×124 pixels

Basic information regarding the instrument status is shown through icons, including:

Battery indicator

Measurement status: Measure, Pause, Stop

Channel status

Overload (O)

Under-range (U)

Elapsed time: hh:mm:ss

CALIBRATION

Calibration Check Vibration Value: 10 m/s2 (3.16m/s2 for high sensitivity accelerometers . positions 5 and 10)

Calibration Check Frequency: 159.2Hz

Electrical Calibration Check Voltage: 100mV for Type 4515-B-002 and 10 mV for Type 4520

PHYSICAL DIMENSIONS

Size: 70 × 135 × 28 mm (2.7 × 5.3 × 1.1 in)

Weight: 260 g (9.2 oz.), battery included