1. Introduction
The MASTECH MS6612 is a versatile digital light meter designed for accurate measurement of illuminance. It features a wide measurement range of up to 200,000 Lux, a large LCD display with backlight, and an analog bar graph for easy reading. This device supports various functions including auto power-off, maximum/minimum value inquiry, data hold, peak measurement, relative measurement, and zero calibration. Its compact and durable design makes it suitable for a variety of applications, from checking lighting conditions in homes and offices to industrial and agricultural settings.
Video: Demonstration of the MS6612 Digital Light Meter in operation.
2. Package Contents
Please check the package contents upon receipt to ensure all items are present and undamaged:
- 1 x MASTECH MS6612 Digital Light Meter
- 1 x Carry Bag
- 1 x Calibration Certificate
- 1 x User Manual (Quick Start Guide)
- Note: A 9V 6F22 battery is required for operation and is NOT included in the package.
Image: MS6612 Light Meter with its packaging and included accessories.
Image: The MS6612 Light Meter shown with its protective carry bag.
3. Product Overview
The MS6612 Digital Light Meter is designed for ease of use and accurate readings. Familiarize yourself with its components:
- Light Sensor: Located at the top, protected by a removable cap. This silicon photoelectric diode measures ambient light.
- LCD Display: Large digital display showing illuminance values, units (Lux/FC), and various mode indicators. Includes an analog bar graph.
- Control Buttons:
- MAX/MIN: Toggles between maximum and minimum recorded values.
- RAN: For automatic and manual range switching.
- LX/FC: Switches between Lux and Foot-Candle units.
- REL/PEAK: Activates relative measurement or peak value measurement.
- HOLD/ZERO: Freezes the current reading (Data Hold) or performs zero calibration.
- Battery Compartment: Located on the back of the device.
Image: Various views of the MS6612 Light Meter, including its dimensions (170mm x 89mm x 43mm).
Image: Detailed view of the MS6612 control buttons.
Image: Rear view of the MS6612, highlighting the battery compartment.
4. Specifications
| Feature | Specification |
|---|---|
| Measurement Range | 0 ~ 200,000 Lux / 0 ~ 20,000 FC |
| Resolution | 0.01 Lux / 0.01 FC |
| Accuracy | ±(3% + 2 digits) |
| Sensor | Silicon photoelectric diode |
| Spectral Measurement Range | 320 - 730 nm |
| Display | 3½ digits LCD, max reading 1999, with analog bar |
| Sampling Rate | ≥ 2 times/second |
| Operating Environment | -10°C to 50°C, max 80% RH (non-condensing) |
| Storage Environment | -10°C to 50°C, max 80% RH (non-condensing, batteries removed) |
| Height | 2000m highest |
| Battery Life Span | Approx. 200 hours |
| Power Supply | 1 x 9V 6F22 Battery (not included) |
| Product Size | 170mm x 89mm x 43mm (6.7" x 3.5" x 1.7") |
| Product Weight | Approx. 420g / 0.93lb (without batteries) |
| Certification | CE, RoHS |
Illuminance Unit Conversion:
- 1 Fc = 10.764 Lux
- 1 Lux = 0.09290 Fc
5. Setup
5.1 Battery Installation
- Locate the battery compartment cover on the back of the device.
- Use a screwdriver or your finger to slide open the battery compartment cover.
- Insert one 9V 6F22 battery, observing the correct polarity (+ and -).
- Replace the battery compartment cover, ensuring it clicks securely into place.
Caution: Ensure the battery is inserted correctly. Incorrect polarity can damage the device. Remove the battery if the device will not be used for an extended period.
6. Operating Instructions
6.1 Power On/Off
- Press the power button (usually marked with ①) to turn the device ON.
- Press and hold the power button to turn the device OFF.
6.2 Taking a Measurement
- Remove the protective cap from the light sensor.
- Turn on the device.
- Point the light sensor towards the light source or area where you want to measure illuminance.
- The current illuminance value will be displayed on the LCD screen.
6.3 Unit Conversion (Lux/FC)
- Press the LX/FC button to toggle between Lux and Foot-Candle (FC) units. The selected unit will be indicated on the display.
6.4 Range Selection (RAN)
- The meter typically operates in auto-ranging mode.
- Press the RAN button to switch between automatic and manual ranging. In manual mode, you can cycle through available ranges.
6.5 Data Hold (HOLD)
- Press the HOLD/ZERO button briefly to freeze the current reading on the display. The 'HOLD' indicator will appear.
- Press the HOLD/ZERO button again to release the data hold function and resume live measurements.
6.6 Maximum/Minimum Value (MAX/MIN)
- Press the MAX/MIN button to display the maximum recorded illuminance value since the function was activated.
- Press it again to display the minimum recorded value.
- Press a third time to exit MAX/MIN mode.
6.7 Peak Value Measurement (PEAK)
- Press the REL/PEAK button briefly to enter Peak measurement mode. The meter will capture and display the highest instantaneous light intensity.
- Press again to exit.
6.8 Relative Value Measurement (REL)
- Press and hold the REL/PEAK button to set the current reading as a reference value. Subsequent measurements will be displayed as a difference relative to this reference.
- Press and hold again to exit relative measurement mode.
6.9 Zero Calibration (ZERO)
- In a dark environment (e.g., with the sensor cap on), press and hold the HOLD/ZERO button to perform zero calibration. This ensures accuracy by setting the baseline to zero.
6.10 Auto Power-Off
- The device will automatically power off after approximately 10 minutes of inactivity to conserve battery life.
Image: The MS6612 Light Meter displaying a measurement while being held.
Image: Front view of the MS6612 with the protective sensor cap in place.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents. Keep the light sensor clean and free from dust or smudges for accurate readings.
- Storage: When not in use, store the meter in its protective carry bag in a cool, dry place. Remove the battery if storing for an extended period to prevent leakage.
- Sensor Protection: Always keep the protective cap on the light sensor when not taking measurements to prevent damage and dust accumulation.
8. Troubleshooting
- Display shows 'OL': This indicates that the measured illuminance value is out of the current range. Try switching to a higher range using the RAN button or ensure the light source is not excessively bright for the selected range.
- Low Battery Indicator: If the low battery symbol appears on the display, replace the 9V battery immediately to ensure continued accurate operation.
- No Display/Device Not Turning On: Check if the battery is correctly installed and has sufficient charge. Ensure the power button is pressed firmly.
- Inaccurate Readings: Ensure the light sensor is clean and free from obstructions. Perform a zero calibration in a dark environment.
9. User Tips
- For the most accurate readings, always ensure the light sensor is clean and pointed directly at the light source or the area where light intensity is critical.
- Regularly perform zero calibration, especially before critical measurements, to maintain accuracy.
- Utilize the data hold function when taking readings in hard-to-reach areas to record the value before moving the meter.
- The MAX/MIN function is useful for monitoring light fluctuations over a period, while PEAK mode helps capture sudden, intense bursts of light.
10. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact the retailer. Keep your purchase receipt as proof of purchase.
