Table of Contents
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Table of Contents
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Summary of Contents for Extech Instruments 403125
- Page 1 User's Guide Digital Light Meter Model 403125...
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Page 2: Warranty
Introduction Congratulations on your purchase of the Extech 403125 Digital Light Meter. This portable, compact light meter provides lux and fc measurements. This meter includes a backlit LCD display and offers PEAK HOLD and DATA HOLD functionality. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. -
Page 3: Specifications
10.764 fc = 1 lux (lumens/meter 0.0929 lux = 1 fc (lumens/foot Temperature Coefficient 0.056 times the specified accuracy per F (< 64.4 F or > 82.4 0.1 times the specified accuracy per C (< 18 C or > 28 403125 V3.1 9/06... -
Page 4: Meter Description
Sensor mounting plugs - Fits into docking jacks at top of meter Docking jacks – Sensor can be attached here for storage or while measuring. Function switch – Three positions OFF, LUX, and FC Handle and battery compartment (rear) Analog output jack 403125 V3.1 9/06... -
Page 5: Operation
The angle of incidence θ is the angle of the surface plane and the direction of the incident light. The inverse-square law and the cosine law can be combined as follows: E = (I cos θ) / d 403125 V3.1 9/06... -
Page 6: Analog Output
The meter can be connected to a chart recorder or other analog recording device via the output jack at the bottom of the meter. A mono (two wire) 2.5mm plug and cable (not supplied) are required. The analog output is 0.1mVDC per display digit. 403125 V3.1 9/06... -
Page 7: Maintenance
Assembly (general) Classroom 10 to 100 107 to 1076 Casual reading Shipping area Stairwell Auditorium ATM machine Storage room 1 to 10 10.7 to 107 Building entrance Parking lot Highway 0 to 1 0 to 10.7 Full moon 403125 V3.1 9/06... -
Page 8: Calibration And Repair Services
For the latest version of this User’s Guide, Software updates, and other up-to-the-minute product information, visit our website: www.extech.com Extech Instruments Corporation, 285 Bear Hill Rd., Waltham, MA 02451 Copyright © 2006 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form.
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