CHECKLINE DT-311D Line Powered Digital Stroboscope User Manual
- June 4, 2024
- CHECKLINE
Table of Contents
CHECKLINE DT-311D Line Powered Digital Stroboscope
INSTRUCTION
- Don’t look directly into the light Source. This may result in eye injury.
- Don’t use or store in the following environments: Direct sunlight, con-densation, dust or caustic.
- Do not alter, or modify. Such action may cause damage and void war-ranty.
- Operate with 0-35°C (32-95°F), 35-85% RH. Use outside of this range may alter the unit’s performance.
The DT-311D is a portable, highly stable, industrial-quality strobo-scope for non-contact inspection and observation of moving parts by providing the user the illusion of stopped or slowed down equip-ment movement. Constructed with a rugged, metal enclosure, the DT-311D’s withstand harsh industrial usage. The universal pow-er range (85-240 VAC) allows one model to be utilized on various power voltages in a multitude of countries. The included top and bottom handles aid in portability and usage flexibility. The control adjustment settings allow the flash rate to be readily altered by the user to visually inspect rotating or reciprocating machinery such as gear teeth, rotors, shafts, rewinders, printing presses, etc. all with-out stopping production. These features make the DT-311D ideal for quality inspection and preventive maintenance of automated motion equipment.
SPECIFICATIONS
- Flashing Range: 60-12,000 fpm (flashes per minute) Accuracy: ±0.01% F.S.
- Resolution: 0.1 from 60-6,000; 1 from 6,001-12,000
- Display: 5 digits 0.4” (10 mm) height
- Flashtube Power/Life: Xenon ≤ 45W / 50,000,000
- Flash Duration: 10-30 µs automatically adjusts with flash rate External Trigger Input: 5 V dc ~ 12 V dc pulse signal input (high level trigger) from sensor
- Sensor Power Supply: 12 V dc up to 50 mA
- Lux Rating: 8” (20 cm) Distance = 1550 lx @ 1500 fpm, 2350 lx @ 6000 fpm with 15.5” (400 mm) irradiation diameter.
- 20” (50 cm) Distance = 650 lx @ 1500 fpm , 580 lx @ 6000 fpm with 23.5” (600 mm) irradiation diameter
- Sensor Power Supply: 5-12 VDC up to 50 mA
- Battery Life: 1.5 to 2 hours depending on settings
- Time to Charge Battery: 5 hours to full charge
- Power Requirement: 85-240 VAC 50/60 Hz
- Operating temperature: 32° – 104°F (0 – 40°C) Dimensions: 8.3 x 4.7 x 4.7” (210 x 120 x 120 mm)
- Product Weight: 2.2 lb (1.0 kg)
- Package Weight: 2.6 lb (1.2 kg)
- Warranty: 1 Year
- Certification: CE, RoHS
- Included Accessories: Top & bottom handles, 9.8’ (3 m) power cable, 3 pin female M16 theaded connector
FEATURES & FUNCTIONS Display
- FPM Flash speed indication in flashes per minute HZ Flash speed indication in Hz
- INT Operation in internal user settings mode
- EXT Operation in external sensor input settings mode
Function Keys
-
SIG
Signal selection. Press this key to switch between internal and external signal operation -
MODE
Switches between Hz and FPM -
- Increases the frequency (internal trigger mode only)
-
–
Deceases the frequency (internal trigger mode only) -
×2
Multiplies the flash rate/frequency by a factor of 2 (internal trigger mode only) -
÷2
Divides the flash rate/frequency by a factor of 2 (internal trigger mode only) -
EXT
External trigger Input -
ON
Switch on button
OPERATION
The Use of Internal Trigger
Turn the power on. The system enters the internal trigger mode. Turn the
encoder knob, or press the “+” “-” keys to adjust the strobe frequency or
flash speed so that detected the object ap-pears stationary. Use “× 2” “÷ 2”
keys to make large changes to the flash frequency.
To measure true revolutions per minute (RPM) by Marking:
- “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. If the object has a uniform shape, such as multi blade fan or the shaft of a motor, you should give it an identifying mark with reflective tape or paint to distinguish its direction.
- Turn power switch on.
- Set flash rate to the highest value and adjust downward.
- 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).
- To verify RPM reading, press “÷2”; a single image should ap-pear again.
To measure true revolutions per minute (RPM) without Marking: This example
explains that if the object has a suitable, unique shape, then the actual
speed of the object may not need to be determined by marking the object.
In this example, the rotation is below 7000 rpm, the following har-monic image
appears:
Harmonic images at 6000 and 4000 rpm are not a single still im-age, but double
and quadruple. Single image appears at 3000 and 1500 rpm. 1500 is half of 3000
and the same single image appears, therefore, the actual speed of the object
is 3000 rpm. 
The Use of External Trigger
When in EXT mode: In this mode, the flash trigger signal frequen-cy or flash
rate speed is automatically adjusted according to an external sensor’s input
signal.
Wiring of the external sensor is as follows:
- +12 V dc up to 50 mA
- Ground
- Trigger signal 5 – 12 V dc
TROUBLESHOOTING
DIMENSIONS (mm)
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