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Summary of Contents for General DLM204
- Page 1 WIDE RANGE SINGLE PIECE DIGITAL LIGHT METER USER’S MANUAL DLM204 Please read this manual carefully and thoroughly before using this product.
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Page 2: Table Of Contents
Return for Repair Policy ..... . 12 INTRODUCTION Thank you for purchasing General Tools & Instruments’ DLM204 Wide Range Single Piece Digital Light Meter. Please read this user’s manual carefully and thoroughly before using the instrument. -
Page 3: Key Features
Lux and foot-candles are different units of the same quantity. One foot-candle (ft-cd) = 10.764 lux, and 1 lux = 0.0929 ft-cd. The DLM204 has a 2 in. diagonal LCD with 1 in. high digits. The meter is powered by a “9V” battery (included in the package). -
Page 4: Safety Instructions
(including dust in high concentration). WHAT’S IN THE PACKAGE The DLM204 is packaged in a white box along with a soft pouch, a “9V” battery and this user’s manual PRODUCT OVERVIEW The figure at right shows all... -
Page 5: Setup Instructions
10. Battery compartment (on back) SETUP INSTRUCTIONS INSTALL BATTERY The DLM204’s battery compartment is under a cover on the lower back of the unit (Callout 10 of the figure). To open the compartment, turn the meter over and slide the cover down in the direction of the OPEN arrow. -
Page 6: Operating Instructions
Begin by selecting a measurement unit—lux or foot-candles. Pressing the Lx/Fc button (Callout 4) toggles between the two units. When the DLM204 powers on, it automatically resumes using the last unit selected. In other words, whichever measurement unit you select becomes the meter’s default unit until you change it. - Page 7 The measurement unit in use will determine which of the two graphics appears at the bottom of the LCD, below the measured light level. In each graphic, there will be a line above or below one of the four values, indicating that it represents the high end of the measurement range currently in use.
- Page 8 On the DLM204, the 0 to 20 FC range has the highest resolution because its readings are always integers followed by two decimal places. The two ranges with the next-best resolution are 0 to 200 FC and 0 to 200 LUX;...
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Page 9: Specifications
To display the maximum light level recorded during the current measurement session, press the M-H button. Doing so will cause the term MAX to appear on the top line of the LCD, above the highest (maximum) value recorded. To return to displaying real-time light-level readings, press the M-H button again. -
Page 10: Operating & Maintenance Tips
To avoid draining the battery prematurely, remember to power off the meter after each measurement session. The DLM204 has no Auto Power Off (APO) function. Remove the battery before storing the meter for an extended period of time (months rather than weeks), to minimize the risk of having the battery leak and damage or ruin the meter. -
Page 11: Warranty Information
WARRANTY INFORMATION General Tools & Instruments’ (General’s) DLM204 Wide Range Single Piece Digital Light Meter is warranted to the original purchaser to be free from defects in material and workmanship for a period of one year. Subject to certain restrictions, General will repair or replace this instrument if, after examination, the company determines it to be defective in material or workmanship. -
Page 12: Return For Repair Policy
New York, NY 10013-3567 PHONE (212) 431-6100 FAX (212) 431-6499 TOLL FREE (800) 697-8665 e-mail: sales@generaltools.com www.generaltools.com DLM204 User’s Manual Specifications subject to change without notice ©2013 GENERAL TOOLS & INSTRUMENTS NOTICE - WE ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS.
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