Extech Instruments 407850 User Manual Download Page 2

Model 407850 Version 1.2 December 2005 

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 

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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Summary of Contents for 407850

Page 1: ...User s Guide Heavy Duty Vibration Meter Model 407850 查询 407850 供应商 ...

Page 2: ...z frequency sensitivity meets ISO 2954 Accuracy 5 of reading 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 inac...

Page 3: ... use the threaded mount to connect to a screw bolt or stud on the equipment under test Powering the meter 1 Press the POWER button to turn the meter ON or OFF 2 The meter is equipped with an automatic power off utility that conserves battery life If the meter is left inactive for 10 minutes it will automatically turn off The automatic power off utility is disabled in the RECORD mode see below Usin...

Page 4: ... operation the D H hold icon will switch off MIN MAX RECORD RECALL Modes To begin capturing the Minimum MIN and Maximum MAX vibration values press the RECORD key REC will appear on the LCD After taking measurements in the RECORD mode press the RECALL button MAX will appear on the display along with the highest reading recorded since the RECORD button was pressed Press the RECALL button again to vi...

Page 5: ...o Service Department to request an RA number A Return Authorization RA number must be issued before any product is returned to Extech The sender is responsible for shipping charges freight insurance and proper packaging to prevent damage in transit This warranty does not apply to defects resulting from action of the user such as misuse improper wiring operation outside of specification improper ma...

Page 6: ...2 to 1 80 Permissible 1 81 to 4 5 Dangerous Greater than 4 5 GROUP M Medium sized Machinery up to 75KW for example motors without special foundations Testing Status Vibration Severity mm s Good 0 00 to 1 12 Acceptable 1 13 to 2 80 Permissible 2 81 to 7 10 Dangerous Greater than 7 10 GROUP G Large Machinery on Heavy Foundations Testing Status Vibration Severity mm s Good 0 00 to 1 80 Acceptable 1 8...

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