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Product Overview:
The Lutron DT-2239A is a microprocessor circuit design, high accuracy, digital readout, light duty STROBOSCOPE/TACHOMETER. It utilizes a custom one-chip microcomputer LSI circuit and a crystal control time base, which provides extraordinary accuracy over a wide, dynamic range. The design is compact and features an impact plastic injection case with a plastic mirror type reflector. This model is certified with ISO-9001, CE, and IEC1010 standards.
Core Functionality and Applications:
This professional instrument is designed for both inspecting and measuring the speed of moving equipment using non- contact methods.
Ideal Uses:
• Inspecting and measuring the speed of moving gears, fans, centrifuges, pumps, and motors.
• General industrial maintenance, ensuring components are running correctly.
• Production and quality control monitoring on assembly lines.
• Laboratory testing and research.
• Educational purposes in schools and colleges for demonstrating strobe action.
Specific Industrial Applications:
The DT-2239A is well-suited for use in industrial, mining, shipbuilding, aircraft construction, cardboard manufacturing, automotive, and motor manufacturing environments.
Advanced Measurement and Inspection:
The meter measures the Stroboscopic Flash Rate in Flashes Per Minute (FPM) or rotational speed in Revolutions Per Minute (RPM), with an automated range selection feature.
Checking True Speed:
When checking rotational speed, it is crucial to ensure the strobe is flashing in unison (one to one) with the monitored object. Stroboscopes can also stop motion at harmonics (2:1, 3:1, 4:1, etc.). To confirm the true speed, adjust the dial until two images appear (which doubles the actual speed), then lower the flashing rate until a single, stationary image appears. This is the true speed.
Motion Analysis:
Once the actual speed is correctly identified, slowly turning the dial up or down creates a slow-motion effect, allowing for a complete visual inspection of the moving object during operation.
Flash Tube Technology and Performance:
The DT-2239A utilizes robust flash specifications for clear, precise readings:
• Flash Tube Type: Xenon lamp.
• Flash Color: Xenon white, 6,500 K degree.
• Flash Energy: 4 Watts-seconds (joules).
• Flash Duration: Approximately 60 to 1,000 microseconds.
• Beam Angle: 80 degrees.
Specifications Table:
|
Feature
|
Detail
|
|
Model No.
|
DT-2239A
|
|
Type
|
Digital Stroboscope / Tachometer
|
|
Stroboscope / Flash Rate Range
|
100 to 10,000 FPM/RPM
|
|
Display
|
0.3" LED, 4 digits
|
|
Resolution (< 10,000 FPM/RPM)
|
1 FPM/RPM
|
|
Resolution (> 10,000 FPM/RPM)
|
10 FPM/RPM
|
|
Accuracy (100 to 5,000 FPM/RPM)
|
± 1 digit
|
|
Accuracy (Over 5000 FPM/RPM)
|
± 0.05%
|
|
Sampling Time
|
1 second
|
|
Range Select
|
Automation
|
|
Flash Tube Type
|
Xenon lamp
|
|
Flash Energy
|
4 Watts-seconds (joules)
|
|
Flash Color
|
Xenon white 6,500 K degree
|
|
Power Supply
|
110 Vac 10%, 50/60 Hz (220 Vac or 230 Vac options available)
|
|
Power Consumption
|
Less than 30 Watt
|
|
Operating Temperature
|
0 to 50 ℃ (32 to 122 ℉)
|
|
Operating Humidity
|
Less than 80% R.H.
|
|
Dimensions (H x W x D)
|
21 x 12 x 12 cm (8.3 x 4.8 x 4.8 inch)
|
|
Weight
|
1 Kg / 2.2 LB
|
Operational Duty Cycle:
To ensure prolonged life and safe operation of the instrument, the following duty cycle guidelines must be followed:
• Below 1,000 RPM: 30 Minutes operation.
• Above 3,600 RPM: 5 Minutes operation.
• Always allow a 10 minute cooling off period between cycles.
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