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The ST-329 is a permanent mount stroboscope array utilizing 
super bright CREE high powered LED lamps.  The ST-329’s LED 
array provides a bright, stable strobe light over a wide measure-
ment range with a lifetime far exceeding xenon lit stroboscopes.  
The ST-329 arrays are available in several standard sizes from 
9.25” (235 mm) to 65” (1650 mm) in length. Custom sizes are 
available upon request.  The arrays are easily mountable on pro-
duction equipment.  An optional mounting adapter kit is available 
to aid in array installation.  A separate control enclosure is con-
nected with 6.5’ (2 m) cable to the array.  Operation is simple with 
the 8 button keypad and large, backlit LCD display.   Phase shift, 
flash duration, plus flash rate are all quickly adjustable via the con-
trol.  The unit can work off user programmed flash frequency or 
from a remote sensor’s signal which will automatically adjust to 
corresponding process fluctuations. 

The ST-329 is designed for speed and frequency measurements 
in the printing, packaging, textile, automotive, cable, mining, steel, 
chemical, optical, medical and shipbuilding industries in various 
applications.

ST-329 LED Stroboscope Array

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 in-

jury.

Don’t use or store in the following environments. Direct sunshine con-

densation, 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.

SPECIFICATIONS

Flash Rate Range: 60 to 120,000 FPM
Accuracy: 0.01%±1 digit of F.S. @ 77° F (25°C)
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
Flash Duration: 0.1°- 2.5°
Phase Shift: 0-359°
Power Requirement: 100-120 VAC; Optional 220-260 VAC 
Input Signal: 12 V Pulse Input; M-12, 3 pin
Input Signal Range: 60-120,000 FPM 
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: Control - ABS; Array - ABS window & aluminum 
frame
Mounting: Control: Magnetic mount to included bracket; Array: 
Flanges for use with 6 mm bolts. Mounting bracket kit available 
separately.
Enclosure Rating: IP65 - Control & Array
Dimensions: Length (See chart on page 6) x 6” (153 mm) x 3.5” 
(90 mm)
Approvals: CE
Warranty: 1 year
Included Accessories:  6.5’ (2 m) AC power cord, 9.8’ (3 m)
control/array connection cable (5 pin)

Operation Panel Located on Control Enclosure

POWER: Power on and off. 

MODE: Select mode of operation or Parameter Menu: Internal/

External/Parameter Settings

SET: Adjust Phase Shift; In Parameter Menu scroll through param-

eter settings, Store setting values.

x2: Multiplies the flash rate/frequency by a factor of 2.

1/2: Divides the flash rate/frequency by a factor of 2.

RATIO: Adjusts flash duration (flash pulse width) in Internal/Ex-

ternal modes.

“+”: Advance image forward 3 degrees at a time in internal mode. 

In parameter setting mode, adjusts setting values.

“-”: Retard image backwards 3 degrees at a time in internal mode. 

In parameter setting mode, adjusts setting values.

Dial: Set flash rate or frequency. CW: Increase flash rate/frequen-

cy. 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 chang-

es the setting value.

Dial

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