
Model 407850 Version 1.2 December 2005
2
Introduction
Congratulations on your purchase of the Extech 407850 Vibration Meter. The 407850
can confirm normal vibration levels and detect abnormal levels in industrial machinery
due to poor balancing, misalignment, structural compromises, and other factors. Careful
use of this meter will provide years of reliable service.
Specifications
General Specifications
Display
3-1/2
digit
LCD
Measurement ranges
Velocity: 0.02 to 7.87 inches/sec (0.5 to 199.9 mm/sec)
Acceleration: 2 to 656 ft/s
2
(0.5 to 199.9 m/s
2
)
Frequency range
10Hz to 1KHz (frequency sensitivity meets ISO-2954)
Accuracy
± (5% of r 2 digits)
Calibration points
Velocity: 50mm/sec @ 160Hz
Acceleration:
50m/s
2
@ 160Hz
Sampling time
One (1) second approx.
Data output
Isolated serial RS-232 PC Interface
Data Hold
Freezes displayed reading
Min/Max Memory
Meter stores highest and lowest readings for later recall
Auto Power OFF
Meter automatically shuts off after 30 minutes of inactivity
Low battery indication
Battery symbol appears on the LCD
Power supply
9V Battery
Power consumption
6mA DC approx.
Operating Temperature
32 to 122
o
F (0 to 50
o
C)
Operating Humidity
Less than 80% RH
Dimensions
Meter:
7.1
x
2.8 x 1.3" (180 x 72 x 32mm)
Probe: 0.75” (19mm) diameter x 0.83” (21mm)
Weight
Meter: Approx. 0.5 lbs (230g)
Probe with magnetic base: 0.09 lbs (38g)
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