Accelerometer Frequently Asked Questions

Question number FAQ-1386

When integrating a signal with the PS-1300, what is calibration method using the DS-0221 general-purpose FFT software?

As described on page 20 of the PS-1300 instruction manual, calculate the displacement value per 5V.

When the sensitivity of the sensor used is [0.9mV/(m/s²⁾] and the gain setting of the PS-1300 is [10];

■ Measurable maximum acceleration, maximum velocity, maximum displacement
(When using a sensor with a sensitivity of 1 mV/(m/ ^s²))

In the case of acceleration (ACC m/ ^s²)

Gain	1	2	5	10	20	50	100
Maximum acceleration (m/s ²)	5000	2500	1000	500	250	100	50

In the case of speed (VEL mm/s)

Gain	1	2	5	10	20	50	100
Maximum speed (mm/s)	5000	2500	1000	500	250	100	50

In the case of displacement (DISP mm)

Gain	0.1	0.2	0.5	1	2	5	10
Maximum displacement (mm)	500	250	100	50	25	10	5

For sensors with a sensitivity other than 1 mV/(m/ ^s²), please check the following formula before use.

From the above formula:

V/EU setting value = Sensor sensitivity × 5 ÷ Maximum displacement value determined by the gain setting (see table above)

(Sensor sensitivity is expressed in mV/(m/ ^s²) units)

In the example above, the actual settings are:

In the DS-0221's input menu, under "Units/ calibration," set the unit name to "mm" and the physical quantity to "0.9V/EU." The same applies to speed, where the unit name is mm/s.

Note that this calibration method is the same for other FFT analyzers, such as the CF-7200.

Last updated: 2007-08-20