Amprobe LM-100
Light Meter
The Amprobe LM-100 light meter measures the visible light from fluorescent, metal halide, high-pressure sodium or incandescent sources.
General
It is a portable, easy-to-use digital light meter designed for simple one-hand operation reading in Lumen (lux) or footcandle (fc) units. The LM-100 measures a wide range of light up to 20,000 fc or lux with an accurate, high resolution of 0.01 fc/lux.
Use the LM-100 light meter to measure the illumination level in the interior and to switch off or reduce or increase the output level of lighting fixtures. Reduce the energy burden of the building by significantly increasing the efficiency of its lighting system.
One lux is the illumination from a one candela lamp perpendicular to a surface one meter squared at a distance of one meter. One fc is the illumination from a one candela lamp perpendicular to a surface one foot squared at a distance of one foot. 1 footcandle = 10.764 lux and 1 lux = 0.09290 footcandles.
Specifications
| Specifications | ||
| Illumination | Accuracy at 23°C ± 5°C (73.4°F ± 5°F), < 75% R.H. | |
| Sensor | Silicon photodiode and filter | |
| Measurement Rate | 2.5 times per second | |
| Range | 20, 200, 2000, 20000, 200000 Lux 20, 200, 2000, 20000 Foot candles |
|
| Accuracy | ± 3% (Calibrated to standard incandescent lamp at 2854°K) | |
| 6% other visible light sources | ||
| Angle deviation from cosine | Characteristics | |
| 30° | ± 2% | |
| 60° | ± 6% | |
| 80° | ± 25% | |
| Cosine Angular corrected per JIS C 1609:1993 and CNS 5119 general A class | ||
| Resolution: 0.01 fc/lux | ||
| General Specifications | ||
| Display | 3 ¾ digit liquid crystal display (LCD) with a maximum reading of 1999 | |
| Sample Rate | 2.5 times per second for digital display | |
| Polatity | Automatic, positive implied, negative polarity indication | |
| Overrange | (OL) or (-OL) is displayed | |
| Zero | Automatic | |
| Low Battery Indication | The  is displayed when the battery voltage drops below the operating level |
|
| Temperature / Humidity | Operating | -10 °C to 50 °C (32 °F to 122 °F); 0 to 80%RH |
| Storage | -10 °C to 50 °C (32 °F to 122 °F); 0 to 70%RH | |
| Altitude | 2000m, indoor operation | |
| Battery | 9V NEDA 1604, IEC 6F22, JIS 006P battery | |
| Battery Life | 200 hours | |
| Auto Power Off | approx 6 min | |
