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LT300-EU-EN V2.3   2/13 

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Introduction

Congratulations on your purchase of the Extech LT300 Digital Light Meter. The LT300 measures
light level (illuminance) to 400,000 Lux (40,000 Fc). The LT300 offers a backlit display, MAX/MIN,

Data Hold, Relative, Peak, and Reset features. This instrument is shipped fully tested and calibrated
and, with proper use, will provide years of reliable service. Please visit our website
(www.extech.com) to check for the latest version of this User Guide, Product Updates, and

Customer Support.

Meter Description

1.

Sensor cable

2.

Analog bargraph

3.

Numerical display

4.

RANGE button

5.

ON/OFF button

6.

MAX/MIN button

7.

RESET button

8.

LCD Backlight button

9.

LUX button

10. Fc foot candle button
11. Protective rubber jacket
12. RELATIVE button
13. Data HOLD button
14. PEAK button
15. Photo sensor dome

Notes: Protective sensor cap not shown. Battery compartment, Tilt Stand, and Tripod Mount

are located on the rear of the instrument. The protective rubber jacket must be removed
from meter to access battery compartment.

www.

.com

[email protected]

1.800.561.8187

Summary of Contents for LT300

Page 1: ...USER GUIDE Digital Light Meter Model LT300 www com information itm com 1 800 561 8187 ...

Page 2: ...r the latest version of this User Guide Product Updates and Customer Support Meter Description 1 Sensor cable 2 Analog bargraph 3 Numerical display 4 RANGE button 5 ON OFF button 6 MAX MIN button 7 RESET button 8 LCD Backlight button 9 LUX button 10 Fc foot candle button 11 Protective rubber jacket 12 RELATIVE button 13 Data HOLD button 14 PEAK button 15 Photo sensor dome Notes Protective sensor c...

Page 3: ...e light measurement is out of range Select another range using the RANGE button 4 Press the backlight button to illuminate the LCD display if needed MAX MIN The Max Min function allows for recording and display of the maximum and minimum light levels over time 1 Press the MAX MIN button The MAX display icon will appear and meter will now display and hold only the highest reading The display will u...

Page 4: ...LT300 EU EN V2 3 2 13 4 www com information itm com 1 800 561 8187 ...

Page 5: ...s the battery compartment Ensure that the compartment cover is securely fastened and that the protective jacket is properly installed before using the meter Never dispose of used batteries or rechargeable batteries in household waste As consumers users are legally required to take used batteries to appropriate collection sites the retail store where the batteries were purchased or wherever batteri...

Page 6: ...r o C Sampling rate 13 3 times per second bargraph 1 3 times per second digital display Photo detector Silicon photo diode with spectral response filter Peak Hold Capture light peaks to 10µS Operating conditions Temperature 0 to 40 o C 32 to 104 o F Humidity 80 RH Storage conditions Temperature 10 to 50 o C 14 to 140 o F Humidity 80 RH Dimensions 165 x 76 x 43mm 6 5 x 3 0 x 1 7 Weight Approx 403g ...

Page 7: ...5 30 Entrance Wash Room 200 750 20 75 Conference Reception Room 300 750 30 75 Cooking Room Dining Table 750 1 500 75 150 Clerical Work 750 1 500 75 150 Show Window 1 500 2 000 150 2000 Typing Drafting Store Hospital 75 150 7 15 Indoors 30 75 3 7 Emergency Stairs 150 200 15 20 Corridor Stairs 75 100 7 10 Stairs 200 300 20 30 Reception 100 150 10 15 Sick Room Warehouse 300 500 30 50 Display Stand 15...

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