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Martindale LM192 Light Meter
Includes: storage case, 2 x 1.5V AA batteries and instruction manual.
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The Martindale LM192 is a high quality general purpose light meter ideally suited to ensuring that office and commercial building lighting achieves the required levels for a healthy working environment. It provides readings up to 200,000 lux with a maximum resolution of 0.1 lux in the 200 lux range. The tough design makes it suitable for all working areas and the intuitive layout with detachable light sensor makes it easy to take accurate and reliable measurements in all types of application.
The LM192 light meter is able to operate for approximately 80 hours continuously and has an auto power off (after 30 minutes) function that can be disabled for longer term Min/Max monitoring.
General purpose light meter.
Auto and manual ranging to 200,000 lux, 20,000 fc.
Resolution to 0.1 lux.
CIE photopic standard.
Hold, Min and Max functions.
Auto power off & low battery indication.
LCD display with backlight.
|Temperature coefficient||0.1 x (specified accuracy) per °C (0-24°C, 26-50°C).|
|Accuracy||±3% (calibrated to standard incandescent lamp 2856°K). Note 1|
|Angle deviation from cosine characteristics error||10° ± 1% | 30° ± 2%
60° ± 5% | 80° ± 20%.
|Range||0.0 to 199.9/1999/19990/199900 lx
0.0 to 19.9/199.9/1999/19990 fc.
|Spectral response||CIE photopic. Note 2|
|Light detector||SI photodiode.|
|Note 1: The CIE standard illuminant A can be realised by means of CIE standard source A, which is defined as: A gas-filled tungsten-filament lamp operating at a correlated colour temperature of 2856K.|
|Note 2: The CIE photopic curve is an international standard for the colour response of the average human eye.|
|Temperature & Humidity (Operating)||0°C to 40°C d 80% R.H.|
|Temperature & Humidity (Storage)||-10°C to 50°C d 70% R.H. with batteries removed.|
|Altitude||up to 2000m.|
|EMC||Conforms to BS EN 61326-1|
|Display||Liquid crystal display.|
|Sampling rate||Twice per second.|
|Over range||OL is displayed.|
|Power||2 x 1.5V AA alkaline batteries (IEC LR6, NEDA 15A)|
|Continuous operating time||Approximately 80 hours.|
|Auto power off||After 30 minutes (can be disabled).|
|Dimensions||169 (L) x 63 (W) x 37 mm (H).|
|Weight||185g including batteries.|
|Martindale LM192 warranty||Two-years.|
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