Extech Instruments 401027 User manual

USER MANUAL
Model 401027
Pocket Foot Candle Light Meter
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Extech 401027-NIST Pocket Size Foot Candle Light Meter

401027-EU-EN v2.2 10/13
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Introduction
Congratulations on your purchase of the Extech Pocket Foot Candle Light Meter which measures
and displays light intensity in foot candle units. Two ranges can be selected (200.0 and 2000 Fc). The
precision color-corrected photo-diode sensor provides 5% accuracy. This device is shipped fully
tested and calibrated and, with proper use, will provide years of reliable service. Please visit our
website to check for the latest version of this User Guide, Product Updates, and Customer Support.
Meter Description
1. Display
2. ON/OFF switch
3. A-B Range switch
4. Light sensor
Meter Operation
1. Slide the ON/OFF Switch to the ON position.
2. Fold out the meter's rear tilt stand and set the meter on a desktop.
3. Select range ‘B’.
4. Hold the Light Sensor with the white lens facing the light source to be measured. The sensor can
also be placed on the desktop facing in the direction of the light source.
5. Read the light measurement on the LCD display.
6. If the measurement is less than 200 fc, select the lower ‘A’ range.
Battery Replacement
The low battery indicator "LO BAT" appears on the LCD display when it is nearing the time to
replace the 9V battery. Reliable readings can still be obtained for several hours after the first
appearance of the low battery indicator. To replace the batteries:
1. Slide the rear battery compartment cover off of the meter and remove the old battery
2. Replace the battery and reinstall the compartment cover
You, as the end user, are legally bound (EU Battery ordinance) to return all used
batteries, disposal in the household garbage is prohibited! You can hand over your
used batteries / accumulators at collection points in your community or wherever batteries /
accumulators are sold!
Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the
end of its lifecycle
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401027-EU-EN v2.2 10/13
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Typical Light Levels for Work Areas
Foot Candles Lux
Emergency Stairs, Warehouse 2 to 7 20 to 75
Exit/Entrance Passages 7 to 15 75 to 150
Packing Work 15 to 30 150 to 300
Visual Work: Production Line 30 to 75 300 to 750
Typesetting:Inspection Work 75 to 150 750 to 1,500
Factories
Electronic Assembly, Drafting 150 to 300 1,500 to 3,000
Indoor Emergency Stairs 7 to 10 75 to 100
Corridor Stairs 10 to 20 100 to 200
Conference,Reception Room 20 to 75 200 to 750
Clerical Work 75 to 150 750 to 1,500
Office
Typing, Drafting 150 to 2000 1,500 to 2,000
Indoors 7 to 15 75 to 150
Corridor/Stairs 15 to 20 150 to 200
Reception 20 to 30 200 to 300
Display Stand 30 to 50 300 to 500
Elevator 50 to 75 500 to 750
Show Window, Packing Table 75 to 150 750 to 1,500
Store
Storefront, Show Window 150 to 300 1,500 to 3,000
Washing 10 to 15 100 to 150
Recreational Activities 15 to 20 150 to 200
Drawing Room, Table 20 to 30 200 to 300
Makeup 30 to 50 300 to 500
Reading, Study 50 to 150 500 to 1,500
Home
Sewing 100 to 200 1,000 to 2,000
Corridor Stairs 7 to 15 75 to 150
Entrance, Wash Room 15 to 30 150 to 300
Cooking Room, Dining Table 30 to 75 300 to 750
Restaurant
Show Window 75 to 150 750 to 1,500
Emergency Stairs 3 to 7 30 to 75
Stairs 7 to 10 75 to 100
Sick Room, Warehouse 10 to 15 100 to 150
Waiting Room 15 to 20 150 to 200
Medical Examination Room 20 to 75 200 to 750
Operating/Emergency Room 75 to 150 750 to 1,500
Hospital
Eye Inspection 500 to 1000 5,000 to 10,000
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401027-EU-EN v2.2 10/13
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Light Sensor Spectrum
Specifications
Circuit Custom LSI microprocessor based design
Display 13mm (0.5") 3.5 digit (1999 count) LCD display
Sensor Photo-diode with color correction filter (meets CIE regulations)
Out of range indication '1 ' is displayed
Sampling time Approx. 0.4 seconds
Power Supply 9V battery
Power consumption Approx. 2.7mA
Operating temperature 0oC to 50oC (32oF to 122oF)
Operating Humidity < 80% RH
Weight 195g (0.43 lbs.)
Dimensions Meter: 131 x 70 x 25mm (5.2 x 2.8 x 1")
Probe: 82 x 55 x 7mm (3.2 x 2.2 x 0.3")
Accessories Probe and 9V battery
Range Specifications
Range Resolution Accuracy
0 to 199.9 Fc 0.1 Fc
200 to 1999 Fc 1 Fc
± (5% + 4 digits) Full Scale
300 400 500 600 700 800
1
0.8
0.6
0.4
0.2
0
Wavelength (nm)
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