Introduction
This manual provides detailed instructions for the safe and effective operation of your LOMEDRETME S8608 Digital Illuminance Light Meter. Please read this manual thoroughly before use and retain it for future reference. This device is designed for accurate measurement of lighting intensity in various environments.
Safety Information
- Do not expose the device to extreme temperatures, high humidity, or corrosive environments.
- Avoid dropping or subjecting the device to severe impact, as this may damage internal components.
- Do not attempt to disassemble, repair, or modify the device. Refer all servicing to qualified personnel.
- Keep the device out of reach of children.
- Remove batteries if the device will not be used for an extended period to prevent leakage and damage.
- Ensure the battery compartment is securely closed during operation.
Product Overview
Components

Image: Front view of the LOMEDRETME S8608 Digital Illuminance Light Meter, showing the light sensor dome at the top, the LCD display, and control buttons below.
- Light Sensor: The spherical dome at the top, responsible for detecting ambient light.
- LCD Display: Digital screen showing measurement readings, units, and various status indicators.
- MODE Button: Used to select different measurement modes, such as Lux or Foot-Candle (FC).
- Power Button: Turns the device on and off.
- RANGE Button: Allows manual selection of measurement ranges or toggles auto-ranging.
- HOLD Button: Freezes the current reading on the display for easier recording.
- Backlight Button: Activates or deactivates the display backlight for improved visibility in low-light conditions.
LCD Display Indicators
- LUX/FC: Indicates the selected unit of illuminance measurement (Lux or Foot-Candle).
- MAX/MIN: Displays when the maximum or minimum reading function is active.
- HOLD: Indicates that the data hold function is currently active.
- LOW BAT: A symbol indicating that the battery power is low and requires replacement.
- AUTO: Shows that the device is operating in auto-ranging mode.
- FAST/SLOW: Indicates the response speed setting for measurements.
Setup
Battery Installation
- Locate the battery compartment cover on the back of the device.
- Open the cover by sliding or unscrewing it (refer to markings on the device).
- Insert the required batteries (e.g., 9V battery or AAA batteries, specific type indicated inside the compartment) according to the polarity markings (+ and -).
- Close the battery compartment cover securely until it clicks into place or is fully tightened.
Operating Instructions
Power On/Off
Press the Power button once to turn the device on. To turn it off, press and hold the Power button for approximately 2 seconds until the display shuts down.
Basic Measurement
- Turn on the device using the Power button.
- Position the light sensor (the spherical dome) towards the light source you wish to measure. Ensure no shadows or obstructions block the sensor.
- The current illuminance reading will be displayed on the LCD in the selected unit (Lux or FC).
Mode Selection (LUX/FC)
Press the MODE button to switch between Lux and Foot-Candle (FC) units. The selected unit will be indicated on the LCD.
Range Selection
The device typically operates in auto-ranging mode, automatically selecting the most appropriate measurement range. To manually select a range, press the RANGE button. Repeated presses will cycle through available ranges. To return to auto-ranging, press and hold the RANGE button (or as indicated by the device's specific functionality).
Data Hold
Press the HOLD button to freeze the current reading on the display. The 'HOLD' indicator will appear. Press HOLD again to release the reading and resume live measurement.
MAX/MIN Measurement
To activate the MAX/MIN function, press the MODE button (or a dedicated button if present, refer to device markings) until 'MAX' or 'MIN' appears on the display. This allows you to view the maximum or minimum illuminance detected during a measurement session. Press the button again to cycle through MAX, MIN, and current readings.
Backlight
Press the Backlight button (often represented by a sun or light bulb icon) to illuminate the display for better visibility in low-light conditions. Press again to turn off the backlight.
Maintenance
Cleaning
Wipe the device with a soft, dry cloth. Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the casing or display. Keep the light sensor clean and free of dust, fingerprints, or smudges, which can affect measurement accuracy.
Storage
Store the device in a cool, dry place, away from direct sunlight, extreme temperatures, and high humidity. If storing for extended periods, remove the batteries to prevent potential leakage and damage to the device.
Troubleshooting
- No Display/Device Not Turning On:
Check battery installation and ensure batteries are not depleted. Replace with fresh batteries if necessary. Ensure the battery compartment is closed correctly. - Inaccurate Readings:
Ensure the light sensor is clean and unobstructed. Verify that the correct measurement unit (Lux/FC) is selected. Check if the device is in auto-ranging mode or if a suitable manual range is selected. - "OL" or Overload Indicator:
This indicates that the measured light intensity exceeds the current measurement range. If in manual range, switch to a higher range. If in auto-ranging, move the sensor further from the light source. - Display Flickering or Unstable:
Low battery power can cause unstable readings. Replace batteries. Ensure the device is not exposed to strong electromagnetic interference.
Specifications
- Model: S8608
- Measurement Range: Up to 200,000 Lux (or equivalent FC)
- Units: Lux, Foot-Candle (FC)
- Display: Digital LCD with backlight
- Functions: Data Hold, MAX/MIN, Auto/Manual Ranging, Low Battery Indicator
- Power Source: (Specific battery type, e.g., 9V battery or AAA batteries - refer to device for exact type)
- Operating Environment: (Typical ranges for temperature and humidity, e.g., 0°C to 40°C, <80% RH non-condensing)
- Manufacturer: LOMEDRETME
- ASIN: B0FGH742TT
Warranty and Support
For warranty information, technical assistance, or customer support regarding your LOMEDRETME S8608 Digital Illuminance Light Meter, please refer to the contact details provided with your purchase documentation or visit the official LOMEDRETME website. Please have your model number (S8608) and purchase date available when contacting support.