Extech Instruments 401027 Manuale utente

User's Manual

Model 401027

Pocket Foot Candle Light Meter

401027 V2.0 6/08

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);

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

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

Meter Description

1. Display

2. ON/OFF switch

3. 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

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

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

401027 V2.0 6/08



Support line (781) 890-7440

Technical Support: Extension 200; E-mail: supp[email protected]

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

Light Sensor Spectrum

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 for contact information. A Return Authorization (RA) number

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.

300 400 500 600 700 800

0.8

0.6

0.4

0.2

Wavelength (nm)

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