SHIMPO DT-315AEB User Manual

DT-315AEB Stroboscope

Instruction Manual

Inspection/Standard Accessories

If upon delivery shipping damage is detected, do not operate the
unit. Notify shipping carrier immediately for damage claim

instructions. Refer to nameplate and record serial number for future
reference. Items included with the DT-315AEB are:

• (1) Handle

• (1) Flash tube removing tool

• (1) External battery pack in carrying bag with shoulder
strap

Features and Benefits

Shimpo’s DT-315AEB stroboscope/digital tachometer
incorporates the latest microprocessor technology for visual

inspection applications:

• Aluminum construction provides exceptional durability

• High polish and focused reflector eliminates “blind”

Congratulations on your purchase of a Shimpo DT-31 5AEB
stroboscope/digital tachometer. We trust you will enjoy many

years of professional results from your Shimpo product.
Please read the entire instruction manual thoroughly before

initial set-up and operation; the information contained herein
will aid you in operating your Shimpo stroboscope safely and

with excellent results.
If you have any questions regarding our product(s), call your

local Shimpo representative or contact Shimpo Instruments
directly for assistance.

viewing areas

• External trigger allows unit to be automatically
synchronized with equipment

• Continuous duty cycle eliminates need to shut down for
cooling

• Phase shift allows visual analysis of rotating/recip r ocating
objects

• High accuracy ( ±0.01% of reading ) is ideal for QC
inspection and process control

• Synchronous output enables strobe to drive other strobes

• Flash timer control conserves flash tube life

Important Safety Instructions

Do not operate or store instrument in the following places:
explosive areas; near water , oil, dust, or chemicals; areas

where temperature is above 104°F (40°C).

Do not look at the emitted light for long periods
of time; it can be harmful to the eyes.

Do not disassemble or repair unit while in
operation.

Do not charge battery pack for more than 15 - 16
hours.

Set-up

The DT-315AEB may be operated handheld or else mounted on
a tripod for added convenience.

T o mount the strobe on a tripod (or any other mounting surface),
use screw ¼ -20unc, length 8mm or shorter for the tripod screw

hole on the bottom.

1. LED display: Displays function and value

2. EXT: External mode indicator

OperationDisplay Panel

True RPM Measurement

Shimpo stroboscopes are DUAL function instruments that give
the operator the illusion of “stopped motion” where in actuality

the equipment under observation is in a moving state. By
adjusting the flash rate, equipment in motion appears to be

standing still. With a slight adjustment, movement can be viewed
in apparent slow motion, which enables the operator or observer

to study the process in action. All Shimpo stroboscopes can
measure rotational (RPM) or reciprocating (strokes per minute)

speeds with the same high precision as with an electronic digital
tachometer.

To measure true revolutions per minute (RPM):

1. “Mark” the object to be measured by either visually noting
an inherent distinguishing characteristic (such as a label,

scratch, etc.) or physically marking the object with a small
piece of tape, pencil mark, etc.

2. Firmly plug in power cord.

3. Turn power switch on.

4. Turn setter from highest FPM downward.

5. The true RPM can be noted once the action appears frozen
and the first single image of the “mark” appears (see chart

below and accompanying diagram for further explanation).

6. T o verify RPM reading, press “÷2”; a single image should
appear again.

3. INT: Internal mode indicator

4. FPM: Flash per minute indicator

5. deg: Phase shift degree indicator

6. mSec: Millisecond delay time indicator

7. Signal switch: Switches the unit from the external mode

to the internal mode (and vice-versa)

8. Display mode switch: When unit is set to the external

mode, the strobe will switch to RPM (FPM)/deg/msec
each time “MODE” is depressed

RPM (FPM) Displays flashes per minute

External input 0-35,000 RPM (FPM)

deg Displays flash delay in degrees

msec Displays flash delay in msec

9. Setter: Changes the flashing rate

10. (x2) Switch: In the internal mode, pressing “x2”

doubles the flashing rate

11. (+) Switch: In the internal mode, when object appears

to be standing still, pressing “+” will give the illusion
that the object is moving towards the rotating direction

at a speed of 1 rotation in 6 seconds

12. (÷2) Switch: In the internal mode, pressing “÷2” divides

the flashing rate by two

13. (-) Switch: In the internal mode, when object appears

to be standing still, pressing “-“ will give the illusion
that the object is moving in reverse at a speed of 1 rotation

in 6 seconds

14. Input and output connector:

PIN #1: +12V
PIN #2: Synch output signal

PIN #3: Input signal
PIN #4: 0V

Shaft Rotation Flashes Flashes/ Stopped
(RPM) (RPM) RPM Shaft Images

6,000 4 times 4
4,500 3 times 3

At 1,500 RPM

3,000 2 times 2
1,500 1 time 1

750 1/2 time 1
500 1/3 time 1

Internal Triggering Mode

To operate the stroboscope in internal triggering mode:

1. Firmly plug power cord into battery pack.

2. Turn power switch on.

3. If internal indicator is not on, press “SIG”; the INT light
will then turn on.

4. Aim light beam at object under observation. The optimal
distance between the strobe and moving object is

approximately 2 feet.

5. Measure RPM by turning the setter to adjust the flashing
rate to the rotational speed of the object.

NOTE: To achieve a particular rate quickly, use the “x2” or
“÷2” switches and then the setter for fine tuning.

15. Power cord

16. Power switch

NOTE: Once the internal timer has expired, the strobe will stop
flashing and the display will flash rapidly. T o restart the strobe,

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