User's Manual
Model 401027
Pocket Foot Candle Light Meter
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
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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
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Light Sensor Spectrum
1
0.8
0.6
0.4
0.2
0
300 400 500 600 700 800
Wavelength (nm)
Calibration and Repair Services
Extech offers repair and calibration services for the products we sell. Extech also
provides NIST certification for most products. Call the Customer Care Department for
information on calibration services available for this product. Extech recommends that
annual calibrations be performed to verify meter performance and accuracy.
Warranty
EXTECH INSTRUMENTS CORPORATION (A FLIR COMPANY) warrants this instrument to
be free of defects in parts and workmanship for one year from date of shipment (a six
month limited warranty applies to sensors and cables). If it should become necessary to
return the instrument for service during or beyond the warranty period, contact the
Customer Service Department at (781) 890-7440 ext. 210 for authorization or visit our
website www.extech.com
must be issued before any product is returned to Extech. The sender is responsible for
shipping charges, freight, insurance and proper packaging to prevent damage in transit.
This warranty does not apply to defects resulting from action of the user such as misuse,
improper wiring, operation outside of specification, improper maintenance or repair, or
unauthorized modification. Extech specifically disclaims any implied warranties or
merchantability or fitness for a specific purpose and will not be liable for any direct, indirect,
incidental or consequential damages. Extech's total liability is limited to repair or
replacement of the product. The warranty set forth above is inclusive and no other
warranty, whether written or oral, is expressed or implied.
Technical Support: Extension 200; E-mail: support@extech.com
Repair & Returns: Extension 210; E-mail: repair@extech.com
Product specifications subject to change without notice
For the latest version of this User Guide, Software updates, and other
up-to-the-minute product information, visit our website: www.extech.com
Extech Instruments Corporation, 285 Bear Hill Road, Waltham, MA 02451
Copyright © 2008 Extech Instruments Corporation (a FLIR company)
All rights reserved including the right of reproduction in whole or in part in any form.
for contact information. A Return Authorization (RA) number
Support line (781) 890-7440
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