SHIMPO DT-315P User Manual

Model DT-315P

DIGITAL STROBOSCOPE

INSTRUCTION MANUAL

1. CAUTION

* Do not operate or store in the following places:

1. Explosive areas

2. Places where water, oil, chemicals, or dust, etc. exists

3. Places where the temperature is over 104°F (40°C)

* Avoid looking at the emitted light for long periods of time.
It may hurt your eyes.

* Do not attempt to dismantle or repair this unit.

* Use tripod screws 1/4-20unc, length 8mm or shorter for the tripod screw
holes on the bottom.

* Charge the battery before using the unit for the first time.

* After the power has been on for 10 minutes, the flashes will stop and the
display will flicker to protect the life of the xenon lamp. To continue
measuring, re-power on.

2. DIMENSIONS

3. DESIGNATIONS

1. SIGNAL SWITCH

When the SIG button is depressed, the unit switches from the external
mode to the internal mode and vice-versa and the appropriate LED
lights.

2. MODE SWITCH

When the unit is switched to external mode, every time the mode
button is depressed, the strobe will move; rpm(fpm)-deg-m.sec.

rpm(fpm) ---- displays flashes per minute

External input: 100~3,000 FPM

deg ---- displays flash delay in degrees

m.sec ---- displays the flash delay in m.sec.

3. SETTER DIAL

The setter dial changes the flashing rate.

External dial ---- used for coarse adjustment:

clockwise for increasing rate.
counter-clockwise for decreasing rate.
The setter returns to mid-position.

Internal dial ---- used for fine tuning:

One turn of the dial will change 10 digits in the
display.

4. x2 SWITCH

In the internal mode, every time the x2 button is depressed, the
flashing rate is doubled.

5. ÷2 SWITCH

In the internal mode, every time the /2 button is depressed, the
flashing rate is decrease by half.

6. PLUS SHIFT SWITCH

When the object appears to be standing still, pressing this button will
give the illusion that the object is moving toward the rotating direction
at a speed of 1 rotation in 6 seconds.

7. MINUS SHIFT SWITCH

When the object appears to be standing still, pressing this button will
give the illusion that the object is moving in reverse of the rotating
direction at a speed of 1 rotation in 6 seconds.

8. INPUT & OUTPUT CONNECTOR

PIN#1 +12V
PIN#2 Synchronized Output
PIN#3 Input Signal
PIN#4 0V
PIN#5 --­PIN#6 +15V
PIN#7 0V
PIN#8 Earth Ground

4. OPERATION INTERNAL SIGNAL MODE

Interior signal mode INT

Mode can be changed alternatively by
SIG switch.

External signal mode EXT

Tune mode rpm display

Delay mode Deg display

Ms Conversion display

Mode can be changed in order by MODE
switch.

1. Firmly plug power cord into a 120VAC (USA) or 230VAC (Europe)
single phase outlet.

2. Turn power switch on.

3. Press the SIG button if the INT lamp does not light up.

4. Aim the light beam at the object under observation.

The best distance between the strobe and the moving object is
approximately 2 ft. (50 cm),

5. Measuring rpm is done by turning the setter dial.

Turn the EXTERNAL KNOB to adjust the flashing rate to the
rotating speed of the object. The greater the turning
angle, the faster the flashing rate.

Turn the INTERNAL KNOB to adjust the flashing rate to

the rotating speed of the object precisely until the object
appears to be standing still.

When the frozen motion is obtained, press the x2 or ÷2 button:

When the x2 button is pressed, 2 frozen figures can be seen overlapped by
180 degree phase shift.

When the ÷2 button is pressed, a freed figure can be seen.

At this moment, the actual rpm of the rotating shaft can be displayed.

The phase shifted frozen motion can also be seen when the displayed rpm is
1/2, 1/3, 1/4, etc., of the rotating shaft. When the x2 or ÷2 buttons are
used effectively, the correct rpm can be attained.

When the + button is pressed, the frozen figure will shift towards the
rotating direction.