9
For a two-point calculation, the actual speed is given by: RPM = AB/(A-B)
For a three-point calculation: RPM = 2XY(X+Y)/(X-Y)2 where
X = (A-B) and
Y = (B-C)
If a self-powered sensor is used to sense one pulse per revolution (External
Input Mode), the readout will display directly in RPM (FPM) without any
adjustment required.
In instances when you can shut down the device and install a piece of
reflective tape, then an optical tachometer is easier to use for RPM
measurement. You can use the PALM STROBE x with an external sensor as
an optical tachometer.
Stroboscopes need only be used as a tachometer
when you can’t shut down the device.
The human eye is not easily tricked
into seeing a stopped image by a stroboscope when the flash rate is slower
than 300 FPM. Therefore, a stroboscope image is difficult to use below 300
FPM for inspection or to measure RPM.
5.0 LAMP REPLACEMENT
WARNING: Before attempting to remove the lamp, make sure the
stroboscope is turned off and remove the Battery Pack (see
). Allow the lamp to cool, waiting at least 5 minutes.
The stroboscope is designed to discharge the internal high voltages within
30 seconds. However, caution should be exercised when replacing the
lamp.
To change the lamp:
1.
To gain access to the lamp, it is only necessary to remove the front lens,
which is held in place by the rubber bumper. Pry the rubber bumper off
the end of the unit. The reflector is held in place by the front lens and
will come loose, but it is not necessary to remove the reflector.
