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The Martindale LM82 is a simple-to-use light meter which will help you to identify the level of light given off by traditional light sources.
An all-in-one light meter, the LM82's sensor is built directly into the top of the instrument and can't be removed. To measure light, hold the sensor as specified in the user manual and the LM82 will calculate the light level in either lux or footcandles and display the result on the LCD screen.
The LM82 can measure light levels to either 200,000 (2k) lux or up to 18580 FC. A variety of additional functions are included such as a data hold function which will freeze the current value on the screen and MIN/MAX/Average functions which can be used to calculate minimum, maximum or average values over a period of time.
|Temperature Coefficient||23°C ± 5°C <70% RH for 1 year
|Range||0 to 200000 lux
0 to 18580 footcandles
|Resolution||1 lux (0 to 19999 lux)
10 lux (20k to 200k lux)
1 fc (0 to 18580 fc)
|Spectral Response||CIE photopic|
|Relative Spectral Response||ƒ < 8%|
|Acceptance Angle||ƒ <2% cosine corrected (150°)|
|Totaly Accuracy For Standard Illuminant A (2856K)||±(3% rdg + 10 digits)|
|Measurement Rate||Once per second|
|Power||2 x 1.5V AAA alkaline batteries (IEC LR03, NEDA 24A)|
|Continuous Operating Time||180 hours typical|
|Auto Power Off||After approx 10 minutes|
|Low Battery Indication||Symbol display when battery voltage drops below operating levels|
|Dimensions||132.9 (L) x 50.9 (W) x 24.7 (D) mm|
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