LM631A - Light meter Amprobe - Free user manual and instructions
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| Product Type | Digital Light Meter |
| Brand | Amprobe |
| Model | LM631A |
| Measurement Range | 0.1 to 50,000 lux (0.01 to 5,000 fc) |
| Accuracy | ±5% of reading + 2 digits |
| Resolution | 0.1 lux / 0.01 fc |
| Sensor | Silicon photodiode with spectral response filter |
| Display | 3½-digit LCD, 2000 counts |
| Functions | Data hold, peak hold, auto ranging, low battery indicator |
| Power Supply | 9V battery |
| Battery Life | Approx. 200 hours continuous use |
| Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Dimensions | 150 x 70 x 35 mm (6 x 2.8 x 1.4 in) |
| Weight | Approx. 200 g (7 oz) including battery |
| Maintenance & Cleaning | Wipe with a soft, dry cloth. Do not use solvents. |
| Safety | Meets IEC 61010-1 standards; CE certified |
| Spare Parts & Repairability | No user-serviceable parts. Contact qualified service center. |
| General Information | Includes 9V battery, protective cap, and user manual |
Frequently Asked Questions - LM631A Amprobe
How do I measure light with the Amprobe LM631A?
Point the sensor toward the light source and read the value on the LCD. The meter automatically selects the appropriate range, or you can switch to manual ranging for more control.
What is the battery type and how do I replace it?
The LM631A uses a 9V battery. Open the battery compartment on the back, remove the old battery, and insert a new one, observing polarity.
Can the meter measure both lux and foot-candles?
Yes, you can toggle between lux and foot-candles (fc) using the unit button.
What is the maximum illuminance it can measure?
The LM631A measures up to 50,000 lux (approximately 5,000 fc) with a resolution of 0.1 lux on the lowest range.
How accurate is the LM631A?
The accuracy is ±5% of reading plus 2 digits under standard test conditions.
Does the light meter have a data hold function?
Yes, press the HOLD button to freeze the current reading on the display for later reference.
How should I clean the sensor and the device?
Use a soft, dry cloth for the housing. For the sensor, gently wipe with a lens cloth; avoid touching the photodiode directly.
What should I do if the meter shows an error or unstable reading?
Check the battery voltage, ensure the sensor is not obstructed, and move away from strong electromagnetic sources. If the problem persists, contact an Amprobe service center.
Is the LM631A safe to use in industrial environments?
The device is designed to meet IEC 61010-1 safety standards and is intended for indoor use. It is not rated for hazardous or explosive atmospheres.
What is included in the box?
The package includes the LM631A light meter, a 9V battery, a protective cap, and a user manual.
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USER MANUAL LM631A Amprobe
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Product information
Brand : Amprobe
Model : LM631A
Category : Light meter