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DT-326B LED Stroboscope
Operation Manual
Use in flammable environments is prohibited. Use in this manner may
result in fire or explosive.
Don’t look directly into the LED light Source. This may result in eye injury.
Don’t use or store in the following environments. Direct sunshine condensation, dust or caustic.
Do not alter, or modify of improperly. Such action may cause damage
and void warranty.
Operate with 0-35°C (32-95°F), 35-85% RH. Use outside of this range
may alter operation of the unit.
Case may become excessively hot when used continuously for more
than 2 hours. Mount unit on a tripod or other fixed device.
The DT-326B is a portable, light-weight stroboscope utilizing super bright CREE High Powered LED lamps. The DT-326B’s LED
array provides a bright, stable strobe light over a wide measurement range with a lifetime far exceeding xenon lit stroboscopes.
Containing a rechargeable lithium battery, a single charge can
last up to a full 12 hours of operation. The DT-326B is designed for
speed and frequency measurements in motion and vibration analysis. It is ideal for predictive and preventive maintenance applications such as: motors, shafts, roto-gravure printing, extruders,
blow molding, wire lettering and striping, engraving, pulse jets,
water jets, fans, cams, gear teeth, belt inspections, fuel injectors,
vibration analysis, audio speaker analysis, spindle spinning, cutting blade timing and sharpness, plus many more in the printing,
packaging, textile, automotive, cable, mining, steel, chemical, optical, medical and shipbuilding industries.
SHIMPO INSTRUMENTS
SPECIFICATIONS
Flash Rate Range: 60 to 120,000 FPM ; 1-2000 Hz
Accuracy: 0.01%±1 digit of F.S. @ 77° F (25°C)
Lux Rating (Approx.): 6000 FPM & 2.5°: Distance 8˝ (20 cm)
5800 lx with 4˝ (100 mm) irradiation dia., Distance 20˝ (50
cm) 1050 lx with 6˝ (152 mm) irradiation dia. 1500 FPM & 2.5°:
Distance 8˝ (20 cm) 6400 lx with 4˝ (100 mm) irradiation dia.,
Distance 20˝ (50 cm) 1125 lx with 6˝ (152 mm) irradiation dia.
Lamp Lifetime: Approximately 3~5 years depending on usage.
Display: Backlit LCD
Resolution: 60 ~12,000 FPM = 0.1 FPM; 12,001~120,000 FPM
= 1 FPM; 1~200 HZ = 0.01 Hz; 201~2000 = 0.1 Hz
Flash Duration: 0.1°- 2.5°
Phase Shift: 0-359°
Power Requirement: 100-240 VAC 50/60Hz
Battery: Lithium DC 10.8V 2000 mA
Battery Life: Approx. 12 hours depending on settings
Input Signal: 12 V Pulse Input
Input Signal Range: 60-120,000 FPM (1-2000 Hz)
Input pulse width: over 50 µs
Input Signal Flash Delay: 0-999 ms; 0-359°
Temperature Limits: 32-95°F (0-35°C)
Humidity Limits: 35 to 85% RH
Enclosure: ABS
Product Weight: 0.84 lb (380 g)
Package Weight: 3.50 lb (1.6 kg)
Dimensions: 8.2 x 2.8 x 2.4” (208 x 70 x 60 mm)
Approvals: CE
Warranty: 1 year
Included Accessories: AC power adapter, Carrying Case
Operation Panel
1. POWER: Power on and off.
2. MODE: Select mode of operation: Internal/External/
Parameter Settings
3. SET: Scroll through parameter settings, Store setting values.
4. x2: Multiplies the flash rate/frequency by a factor of 2.
5. 1/2: Divides the flash rate/frequency by a factor of 2.
6. RATIO: Adjusts flash duration (flash pulse width) in Internal/
External modes.
7. “+”: Advance image forward 3 degrees at a time in internal
mode. In parameter setting mode, adjusts setting values.
8. “-”: Retard image backwards 3 degrees at a time in internal
mode. In parameter setting mode, adjusts setting values.
9. Dial: Set flash rate or frequency. CW: Increase flash rate/fre-
quency. CCW: Decrease flash rate/frequency. (Turn dial quickly
to drastically change value; Turn dial slowly to change value
by 1 digit.) In parameter setting mode, CW or CCW rotation
changes the setting value.
10: FPM/Hz: Select between FPM or Hz units of measure
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LCD Display
Battery
Indicator
Display
Parameter
Icons
Sub
Data Display
Main Data Display
•Flash rate value will be displayed in internal flashing or External trigger mode.
Units
Main
Data
FUNCTION INSTRUCTIONS
Mode Selection - To switch between INTERNAL, EXTERNAL and
PARAMETER mode, press and release the MODE key. For details
about Parameter setting mode, please refer to Parameter setting
mode section.
•Display will indicate “P” or “LCD” (in ON/OFF setting of LCD
backlight) in *Parameter setting mode.
*For details about Parameter setting mode, please refer to Parameter setting mode.
Sub Data Display
Internal Mode
•Phase Shift will indicate degrees of phase shift in internal flashing mode. To change the degrees of phase shift, press + or keys. The display will reflect the cumulative angle of phase shift.
•The flash duration time will be displayed when the RATIO key
is pressed. The flash duration time can then be increased or
decreased with the dial from 0 to 2.5 (0~2.5°) degrees.
External Mode
• In external trigger mode, the display will show the settings of
delay time. For details about changing these settings, please
see external trigger mode section.
Battery Indication - Indicates remaining battery charge.
Note: The display will not indicate a battery charge when the unit
is being used with the AC Adapter.
Internal Flashing Mode
Changing Units of Measure in Internal Mode - To change the
measuring units from FPM to Hz, press and release the FPM/Hz
key. Units will alternate with each press and release.
Flash Rate (Frequency Setting) in Internal Mode You can set the flash rate by turning the dial in the center of the
unit. To increase the flash rate, turn the dial in the clockwise direction. To decrease the flash rate, turn the dial in the counter-clockwise direction. For small adjustments, turn the dial slowly. For
quick adjustments, rotate the dial quickly. The flash rate range
and resolution will be different according to the selected measuring range.
One function of a stroboscope is to provide a “stopped” image
of a rotating target when the flash rate of the stroboscope has
matched the rotational speed of the target object. The stroboscope will show a single image when the flash rate is set to a
lesser multiple of the true RPM (1/2,1/3,etc.) When the flash rate
is increased to a higher multiple (2,3,etc.), multiple images will
appear. To find the true RPM of the target object, reduce the flash
rate to a lower multiple until only one image appears.
Batter capacity is full
The Battery capacity is diminished Near zero
capacity
When battery is empty, the unit will power off
Remarks: It can be used for more than 12 hours continuously
when the frequency is 3000FPM or 50Hz.
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Stopped Image:
1/3
Example
True
Rotational Speed
of Target Object
(rpm)
900 rpm
Flash Rate of
Stroboscope
(fpm)
3600
2700
1800
900
450
300
Multiple
of True
Rotational
Speed
4 times
3 times
2 times
1 time
1/2 times
1/3 times
Number of
Stopped
Images
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3
2
1
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Multiple/Divide by 2 Function - The flash rate can be doubled or
halved by x2 and 1/2 keys on the operation panel.
1. Doubling the flash rate(x2) Press x2 key to multiply the current flash rate by a factor 2.
Flash Duration (Brightness) Settings
The flash duration, RATIO key, can be set within the range of 0.1°-
2.5° over a 360° period with a resolution of 0.1°.
When the flash duration is lengthened, the brightness of the flash
will be increased, however the image of the target object may
appear slightly out of focus. When the flash duration is shortened,
the brightness will be decreased, yet the image of the target object will become more focused.
To change the flash duration in either Internal or External modes,
first press the “RATIO” key. Once pressed, “Flash Time” will appear with the current flash pulse duration ratio in the sub display.
The flash pulse duration can now be modified.
Note: The use of the x2 key will have no effect when multiplication of the current flash would result in a value that exceeds the
maximum flash rate range. After the flash rate changes, it becomes the new value based on the set display resolution. Therefore, the rate may likely not return to the original frequency, even
if the “1/2” key is pressed.
2. Having the flash rate(1/2) Press “1/2” key to divide the current
flash rate by a factor of 2. Operation Indication
Note: The use of the 1/2 key will have no effect when the division of the current flash rate would result in a value that goes
below the minimum flash rate.
After the flash rate changes, it becomes the value based on the
set display resolution. Therefore, the rate may likely not return
to the original, even after pressing the x2 key.
Phase Shift (Angle) - First, press ‘SET” key, then enter this
mode. When the rotation speed of the target object and the
flash rate of the DT-326B becomes equal, the phase shift function can be used to delay the flash so that the image will appear
to rotate incrementally. The phase shift angle can be increased
or decreased 3°, each time the “+” or “-” keys are pressed or
the adjustment dial is turned CW or CCW. The sub display will
show the cumulative angle of the phase shift.
To set the flash pulse duration while in the modifiable mode;
press “+” key, or turn the dial in the clockwise direction to increase the flash pulse duration by 0.1° increments.
Press “-” key, or turn the dial in the counter clockwise direction to
decrease the flash pulse duration by 0.1° increments.
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External Trigger Mode
External trigger mode will allow the flash rate of the DT-326B stroboscope to be controlled by an external signal, such that the flash
rate will automatically increase or decrease when the signal is altered, so that it may remain in unison with the speed of a changing target.
Connector of External Input/Output
Charging round socket: positive 16V, negative 16V
External synchronous USB port: 1.+12V output 2.OUT exter-
nal pulse input 3.-12V output
External Pulse Input: The input signal will have the following
characteristics.
Input frequency: 60-12,000 fpm (1-2000Hz) Input pulse width:
over 50 µs. Delay angle: 0-359° (every 1°) Delay time: 0-999 ms
(every 1ms)
Note: When the external sensor is used, use the AC power
adapter power supply.
External Trigger Mode: LCD Display Information
The frequency of the external signal is measured each period,
while the latest external frequency measurement is updated every 50 ms.
External Trigger Flash Delay Setting
A flash angle delay can be programmed into the DT-326B to delay
the flash after an external trigger signal is detected. The unit of
delay can be set to time (msec) or degree (°). Use “+” or “-”key
to alternate between the settings of delay angle or delay time.
+
_
Additionally, there are several settings that can be adjusted in External Trigger mode, including phase shift, delay time, and flash
duration.
The flash timing can be set by using the positive or negative edge
of an external trigger signal. Also the delay of the flash timing can
be set by time in (msec) or degrees (°).
Press “mode” once and the unit enters EXTER 1. In this mode,
frequency (HZ) or speed (FPM) automatically flash according to
the external trigger signal.
After setting the parameters, generally the detected object has an
advanced or lag phenomenon. To adjust, press the “+” or “-” for
fine-tuning, change the perimeter parameters, so that detected
object achieves a still image. In this setting process, the unit will
automatically save the last setting.
Delay Time Setting
The delay time can be set to incorporate a delay from the external
pulse input to the flash output. The delay can be set from 0-999
ms with a resolution of 1 ms.
Note: Because of the existence of a delay in internal calculation,
the DT-326B flashes 60 µs after the external signal input. This results in the actual setting delay time having approximately +60 µs
added to the delay.
Example
Trigger: positive edge Delay Time: 10 ms
The DT-326B does not flash at the 1st trigger pulse as shown
below in the diagram, DT-326B flashes from the external trigger
after 10 ms.
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If the period of the external input is less than the setting of the
delay time, the delay time is ignored and the DT-326B flashes as if
the delayed time equals 0.
To adjust the delay time, press the “+” or “-” key. Or turn the dial
to set the delay time. Delay time will increase as the dial is turned
clockwise, and decrease as it is turned counter clockwise.
Delay angle decreases as the dial is rotated to the left. The settings will eventually go to 0° as the angle decreases past 359°.
Units of Measure - Changing from FPM to Hz
To change the units of measure FPM to Hz, press and release the
“FPM/Hz” key while in internal mode.
Delay Angle Setting
As the period of the external input is 360, the delay angle can be
set from 0°to 360°, by every 3°. Since the internal calculation time
is 60 µs, the actual delay time is as follows:
Delay angle setting/360° x period of external input + appox. 60 µs.
The DT-326B does not flash at the 1st trigger pulse as shown below in the diagram.
Example: Trigger: positive Delay Angle: 36° 36/360=10
If the current period of external trigger input changes, the time of
the flash is not accurate, because the time is calculated based on
the previous measurement period.
If the current period of external trigger input is less than the previous period and the next trigger input occurs before the flash time,
the delay angle setting is ignored and the DT-326B flashes at the
delay angle=0°.
Note: As the displayed value changes, fractions generated are
rounded down.
Parameter Settings
To enter parameter setting mode, press “MODE” until the LCD displays “P”. When the display shows “P’, press the SET key to cycle
between the various parameter settings available (range, trigger
edge, delay time, LCD backlight, Auto Shut-off, Initial). To store
the settings and return to measuring modes, press the MODE key.
Measuring Range Setting
You can adjust the flash setting from the home view and also in
parameter mode if desired.
To adjust, press the “+” or “-” key. You may also use the adjustment dial.
The delay angle increases as the dial is rotated to the right. The
angle settings will go to 0° as the angle increases past 359°.
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Trigger Edge Setting (External Modes)
In external mode, the trigger edge parameter will allow for selecting either the leading edge or trailing edge of the input pulse to
trigger the stroboscope flash.
In parameter mode, use the SET key to cycle to the Trigger Edge
setting parameter mode. To set the trigger edge as “Down Edge”
(trailing), press “ -“ key or turn the dial clockwise. To set the trigger edge as “Up Edge” (leading), press “+” key or turn the dial
clockwise.
Back Light Setting
The LCD display of the DT-326B stroboscope has a backlight that
can be turned on or off in the parameter settings. Turning off the
backlight will conserve battery power. To adjust the backlight setting, enter parameter mode and use the “SET” key to cycle to LCD
setting. Press “+” key to turn on the backlight. Press “-” key to
turn off the backlight.
Note: If the backlight is set to on, as a power saving feature, it will
automatically shut off after the set minutes if no keypad or dial
operation has occurred. The LCD backlight will turn back on with
keypad or dial operation.
Automatic Power-Saving Settings
Auto Power Off: The unit will automatically turn off after 1 to
1000 minutes depending on settings if no keypad or dial operation occurs when using battery power. Flashing will resume
with either a dial (rotation) movement or a keypad operation.
When trigger edge setting is set to “up edge”. The flash will occur on the leading edge of the input pulse (when delay setting is
zero).
External Pulse Signal from Machine/Sensor
vs. Stroboscope Flash
Up Edge
When trigger edge setting is set to “down edge”. The flash will
occur on the trailing edge of the input pulse (when delay setting
is zero).
External Pulse Signal from Machine/Sensor
vs. Stroboscope Flash
Down Edge
The LED auto shutoff will not occur in External trigger mode,
while a signal is being received by the unit. The LED flashing
will automatically turn off after the set 2 minutes of no external
pulse input.
LCD Back Light Off: If the backlight is set to on, as a power
saving feature, it can be adjusted to automatically shut off from
1 to 1000 seconds, if no keypad or dial operation has occurred.
The LCD backlight will turn back on with keypad or dial operation.
Factory Reset (Initial)
To reset unit to factory values choose “Yes” under Initial in the
parameter setting mode. Then press “SET”.
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