Vibration Meter

Specifications and Product Details:

Vibration meter type VM301A0 is a portable instrument, which is used in conjunction with Piezo-electric accelerometers to measure mechanical vibrations in terms of acceleration, velocity & displacement. It is suitable for both laboratory and field conditions. This instrument can be used to monitor vibration levels in production machines on a periodic basis, so that action can be taken before a complete machine failure. Its operation is simple and quite suitable for use by non-scientific personnel not conversant with electronic instrumentation.

In combination with IPA Piezo electric accelerometers the unit provides direct read out of vibration parameters on a 3½ digit LCD display.

The unit is powered by an 18V battery, which is built-in. Provision is also made for using an external power supply of 18V.

FUNCTIONAL DESCRIPTION

The Vibration meter VM301A0 is designed to accept charge output from Piezo-electric accelerometer having sensitivity in a range of 1pc/m/s² as shown in the block diagram. The input is fed to a variable gain amplifier which facilitates gain adjustments to calibrate the instrument and match the sensitivity of the accelerometer in use. The following integrator stages provide signals proportional to velocity and displacement parameter into the precision rectifier, whose DC output is calibrated in terms of the respective vibration parameters. The 3½ digit LCD display provides direct read out of vibration parameters. Output of 2V DC (F.S) is available for recording purpose.

Specifications :

1	Model no.	VM 301 A0
2	Input Impedance	>10,000 MW
3	Max. input signal	800 Pico-coulombs
4	Source Capacitance (Max.)	30,000 pf
5	Frequency Range	10 Hz to 10 KHz
6	Sensitivity calibration	Adjustable for accelerometers Having sensitivity from 1 pc/m/s2 To 10 pc/m/s2
7	Display	3 ½ digit LCD
Measurement Range
8	Acceleration	0.1 –199.9 m/s1 (peak), (10Hz to KHz)
9	Velocity	0.01-19.99 cm/s (rms), (10Hz to 3 KHz)
10	Displacement	0.003-1.999mm (p-p), (10Hz to 1 KHz)
11	Output	Analog DC output 2V F.S (Min. load 10 KW)
12	Operating temperature	0-40° C
13	Accuracy	A - ± 5% ± 1 LSB
		V - ± 5% ± 1 LSB
		D - ± 5% ± 1 LSB
Power Supply
14	Internal	2X9V (TYPE 522 CELL, Battery life approx. 40 hours under constant use)
15	External	Provision for ext. 18V 50mA D.C supply
Dimensions
16	Height	70mm
17	Breadth	144mm