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6.0 LIMITATIONS OF REMOTE OPTICAL SENSORS
Remote Optical Sensors have a limitation when used with the Phaser-
Strobe pbx because they sense not only the reflective marker but the
strobe flash as well. If the ROS is positioned near the strobe, the light from
the strobe may cause the ROS to trigger the stroboscope at the wrong
time, especially when using a delayed flash mode. The Phaser-Strobe pbx
has an
Input Blanking
feature to allow it to ignore this false trigger.
Even with the Input Blanking, large delays cannot be obtained using an ROS
if the strobe’s flash is triggering the ROS. The duration of the ROS pulse in
response to the strobe’s flash is about 0.5 milliseconds to 1.1 milliseconds
depending on the flash rate. This limits the largest delay possible because
the flash swamps the signal from the ROS, and consequently it will not
provide the pulse from the reflective marker. If large delays are desired,
reposition the ROS so it is away from the strobe’s flash or use a magnetic
sensor.
The Input Blanking feature itself limits the maximum delay which is
detrimental to non-optical sensors. It is possible to disable (or enable) the
blanking in the Phaser-Strobe pbx (see
7.0 LAMP REPLACEMENT AND FUSE
7.1 Lamp Replacement
WARNING
Before attempting to remove the lamp, make sure the
stroboscope is turned off and any mains cord is removed from
the AC outlet. 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.
