Shimpo DT-315A User Manual download pdf (Page 3)

Operation

External Triggering Mode

To operate the stroboscope in external triggering mode:

1. Connect external trigger or sensor wires according to

connector pin designation:

1 +12V (for powering sensor)

2 Synch output signal

3 External input signal

4 0V (common)

2. Firmly plug in power cord.

3. Turn power switch on.

4. If INT lamp is on, press “SIG” until EXT lamp turns on.

5. Press “MODE” to select proper mode:

FPM Light will flash in correspondence with input signal;

the input signal will be calculated into FPM and

displayed.

deg One cycle of input signal is 360°. A delayed angle

will be displayed from 0 up to 359°. (The delayed

angle can be changed by turning the knob setting as

previously described).

msec The above delayed angle will be displayed in msec.

NOTE: If the input signal frequency exceeds upper or lower

limits, the alarm dashes (-----) will be displayed and the strobe

will stop flashing.

NOTE: Once the internal timer has expired, the strobe will stop

flashing and the display will flash rapidly. To restart the strobe,

turn power switch off, then on, and the cycle will repeat.

Synchronous Output Signal

For triggering and controlling additional stroboscopes, the

synchronous output signal appears on pin #2 (see below).

Flash Tube Replacement

When FPM reading is displayed but unit is not flashing, flash

tube may need to be replaced:

1. Unplug line cord from power line.

2. Turn power switch off (wait a few minutes until

stroboscope is cool before proceeding).

3. Remove protective window by removing the 4 screws.

4. Use tube removing tool provided: insert tool all the way

and turn clockwise until tool locks. Pull out tube.

5. Install new flash tube using the removing tool.

6. Replace protective window.

7. Mount reflector in the center so that the reflector will not

interfere with the screw spacer on the corners.

If battery is low, “LLLLL” is displayed and display will eventually

disappear. Charge battery as follows:

1. Turn power off.

2. Insert AC adapter/charger plug into the strobe receptacle

(CAUTION: charge the unit only with the provided AC

adapter/charger).

3. B-CH lamp will be lit during battery charge; within 2 hours

the battery should be charged completely.

NOTE: The adapter/charger may be used as a power supply to

power the strobe continuously.

Battery Charge (DT-315A Only)

Battery Replacement (DT-315A Only)

The life of the built-in battery should last for approximately 300

charges. If the time period between recharges becomes

increasingly shorter, then replace battery with a new one.

FPM Display Mode

If the input signal exceeds 585Hz, the upper dashes on the digital

display will be flashing:

----- upper dashes

If the input signal is lower than 0.67Hz, the lower dashes on the

digital display will be flashing:

----- lower dashes

Deg/msec Display Mode

If the input signal exceeds 167Hz, the upper dashes on the digital

display will be flashing:

(deg) ----- upper dashes ----- (msec)

If the input signal is lower than 0.67Hz, the lower dashes on the

digital display will be flashing:

(deg) ----- lower dashes ----- (msec)

Memory

The following parameters are set at the factory:

• Decimal point: autorange

• Internal timer: continuous

• External trigger edge: L-H (Lo to Hi)

These parameters can be changed in the field to facilitate different

situations. To change any of the above parameters, follow these steps:

1. Turn power on.

2. Make sure that INT lamp is on. If not, press “SIG” until it

turns on.

3. Change the desired memory parameter:

a. To change the decimal point

Press “÷2” and “-“ at the same time for approximately

2 seconds until display alternates between —1— and

0.0. Press “+”. The display will freeze and show 0.0.

Change decimal point accordingly by pressing “+”. If

0.0 is selected the decimal point is in the autorange

mode. If 0 is selected the decimal point is eliminated

throughout the entire range.

b. To change the internal timer

Press MODE. The display will alternate between

—2— and 0; press “+”. The display will freeze to 0.

Use the setter to set timer anywhere between 1 and 120

minutes.

c. To change the trigger edge or the external mode

Press MODE. The display will alternate between

—3— and L-H. The external trigger edge is set from

the factory to occur during the positive transition of the

incoming pulse. To change it to the negative transition,

press “+”. Display will change from L-H to H-L.

4. Press “SIG” to go back to normal operation.

NOTE: the above settings can be checked quickly by performing

steps A to C as described above and then pressing “SIG”.

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Shimpo DT-315A User Manual Page 3

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