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

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

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

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

0.8

0.6

0.4

0.2

Wavelength (nm)

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