User's Guide Pen Vibration Meter Model VB400
Introduction Congratulations on your purchase of the Extech VB400 Meter. The VB400 is designed to provide easy and accurate velocity and acceleration measurements on industrial machinery. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Features Applications for industrial vibration monitoring : All in one pen type digital vibration meter. Acceleration, Velocity measurement, RMS measurement value.
Meter Description 1. Display 2. Power Button 3. Hold Button 4. Function Button 5. Battery Cover/Compartment 6. Vibration Sensor 7. Tip Sensing Head 8. Magnetic Base 5 1 2 3 4 6 7 8 Display Icons HOLD HOLD has been activated ACC Acceleration with units : m/s , ft/s , g VEL 2 2 Velocity with units: mm/s, cm /s, inch/s Low battery Magnetic base and Tip sensing head When measuring non-ferrous materials, place the Tip sensing head onto the vibration sensor.
Operation Preparation for measurements 1. Press the POWER button to turn the meter on. 2. Check that the display is on and that the low battery icon is not on. 3. If the low battery icon appears, replace the batteries. 4. Attach either the sensing head or the magnetic base by screwing it into the vibration sensor. Measurements 1. Press the MODE button to step through and set the function (velocity or acceleration) and the units desired. 2.
Zero Adjustment Procedure Over time the meter ‘0” may drift by a few digits. This is caused by temperature change, battery voltage and other ageing factors. Usually this small change is not of significance for typical measurements. To remove the error: 1. Open the battery compartment 2. Hold the battery lid down so contact is made and the meter can be turned on. 3. With no vibration, adjust the meter zero adjustment until the display reads zero (no minus sign).
Specifications General Specifications Display Measurement Mode Frequency range Sampling time Operating temperature Operating humidity Power supply Power consumption Weight Dimension LCD, 20 mm x 28 mm. Velocity, Acceleration. (RMS value). 2, 2 Acceleration: g, m/s ft/s Velocity: mm/s, cm/s, inch/s 10 Hz to 1 KHz Approx. 1 second. 0 to 50°C ( 32 to 122°F ). < 80% RH. DC 1.5V battery ( UM-4/AAA ) x 4 PCs. Approx. DC 12 mA. 240 g ( 0.53 lb ). Meter: 175 x 40 x 32 mm, ( 6.9 x 1.6 x 1.3 inch ).