General Tools and Instruments DLM204 - Manual (Page 9)

To display the maximum light level recorded during the
current measurement session, press the M-H button. Doing
so will cause the term MAX to appear on the top line of the
LCD, above the highest (maximum) value recorded.
To return to displaying real-time light-level readings, press
the M-H button again.
SPECIFICATIONS
Overall Measurement Range: 0 to 20,000 foot-candles
(ft-cd)/0 to 200,000 lux
Individual Ranges/Resolutions: 0 to 20 ft-cd/0.01 ft-cd;
0 to 200 ft-cd/0.1 ft-cd; 0 to 2,000 ft-cd/1 ft-cd; 0 to
20,000 ft-cd/10 ft-cd; 0 to 200 lux/0.1 lux; 0 to 2,000 lux/
1 lux; 0 to 20,000 lux/10 lux; 0 to 200,000 lux/100 lux
Measurement Accuracy: ±3% of reading for standard
incandescent lamp operating at 2856°K; ±6 to 8% for
other visible light sources (incandescent, fluorescent,
high-pressure sodium and metal-halide lamps)
Angular Deviations from Cosine Characteristics:
±2%@30°, ±6%@60°, ±25%@80°
Ranging Type: Manual only
Display Type & Size: 2 in. (50mm) diagonal LCD with 1 in.
(25mm) high digits
Display Resolution/Refresh Rate:
2000 counts/2.5 times/second
Light Sensor Type: Silicon photodiode
Environmental Classification: Pollution Degree 2
(offices, laboratories and test stations)
Operating Temperature:
14° to 122°F (-10° to 50°C)@<80%RH
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