Extech Extech 401027 Manual

User's Manual

Model 401027
Pocket Foot Candle

Light Meter

99 Washington Street
Melrose, MA 02176

Phone [phone]
Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

Back to the Extech 401027 Product Page

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

FAX [phone] - TestEquipmentDepot.com

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.

Specifications

Circuit Custom LSI microprocessor based design
Display 0.5" (13mm) 3-1/2 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 32oF to 122oF (0oC to 50oC)
Operating Humidity < 80% RH
Weight 0.43 lb. (195g)
Dimensions Meter: 5.2x2.8x1" (131x70x25mm);

Accessories Probe and 9V battery

Range Specifications

Range Resolution Accuracy

0 to 199.9 Fc 0.1 Fc
200 to 1999 Fc 1 Fc

Probe: 3.2x2.2x0.3" (82x55x7mm)

± (5% + 4 digits) Full Scale

Meter Description

1. Display

2. ON/OFF switch

3. Range switch

4. Light sensor

1

2

3

4

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

2

401027 V2.0 6/08

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

Typical Light Levels For Work Areas

Foot Candles Lux
Factories

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
Electronic Assembly, Drafting 150 to 300 1,500 to 3,000

Office

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
Typing, Drafting 150 to 2000 1,500 to 2,000

Store

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
Storefront, Show Window 150 to 300 1,500 to 3,000

Home

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
Sewing 100 to 200 1,000 to 2,000

Restaurant

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
Show Window 75 to 150 750 to 1,500

Hospital

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
Eye Inspection 500 to 1000 5,000 to 10,000

Light Sensor Spectrum

Test Equipment Depot, 99 Washington Street, Melrose, MA 02176

781.665.1400 | 800.517.8431 | Fax: [phone]

1

0.8

0.6

0.4

0.2
0

300 400 500 600 700 800

Wavelength (nm)