SHIMPO DT-900 - Manual (Page 14)

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6. If the “x2” or “÷2” buttons are pressed and the calculated rate is beyond the range of 40-12,500 FPM,
the flash rate will be set to the limit of the strobe. For example, if the strobe is set to 8000 FPM,
pressing the x2 button will change the rate to 12,500 FPM.
NOTE: The DT900 is only limited to the following FPM
Max Flash: 12,500 FPM
Min Flash: 40 FPM (Internal Triggering Mode)
Min Flash: 15 FPM (External Triggering Mode)
Phase Shift Function
The Phase Shift function button is used to read the angular delay or advancement in degrees between the
trigger signal and the actual speed of the moving object.
Phase shifting is used to examine the entire circumference of a gear or reciprocating machine while in
operation. This important handy feature that allows the operator to examine the object in motion, providing
a “real time” view for predictive and preventive maintenance.
The operator can rotate the view by changing the phase of the strobe flash.
1. Lock onto the desired speed by adjusting the strobe flash rate until the object appears stationary.
2. Enter the “Phase Mode” by pressing the Phase button. The display will show “Phase: 0 deg”.
3. Rotate the knob counter clockwise to decrease the phase angle. Turn the knob clockwise to
increase the phase angle. Angle is change by 5 degrees by each step on the dial.
Alternatively, you can spin the phase angle using the “x2” and “÷2” buttons. Hold down the “x2”
button to spin positively through the phase angles. Hold down the “÷2” button to spin negatively
through the phase angles. Releasing the button will stop and hold the last phase angle.
4. Press “Phase button” again to exit the Phase Shift Mode and return to normal operation.