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                                                                       3                                          LT45-en-US_V2.1   6/20

Safety 

Do not operate the meter in environments where the following are present: explosive gases 
(or materials), combustible gases (or materials), steam, or dust.  
Please replace the battery immediately when

 

the battery symbol 

 appears on the LCD. 

Do not touch t
could damage the sensitive components. 
For Indoor use only. This instrument was designed for pollution degree 2. 

Meter Description 

1.

Display (LCD) 

2.

Lux/Fc/CD unit select button 

3.

MEM/READ button (for 99 reading memory) 

4.

Up arrow button and MAX/MIN/AVG button 

5.

Power and Auto Power OFF control button 

6.

Zero Calibration button 

7.

Data Hold and Light source select button 

8.

Down arrow button 

9.

Coiled sensor connection cable 

10. Photo detector 

 

Note: The battery and tripod mount are located 
on the back of the meter 

www.

.com

[email protected]

1.800.561.8187

Summary of Contents for LT45

Page 1: ...User Manual LED Light Meter Model LT45 www com information itm com 1 800 561 8187 ...

Page 2: ...ted and with proper use will provide years of reliable service Please visit our website to check for the latest version of this User Guide Product Updates and Customer Support Features Overload Indication LCD screen at the upper left hand corner Battery strength status indication Display Update Rate 2 5 times per second Spectral response near CIE luminous spectral efficiency ratings Cosine Angle c...

Page 3: ... For Indoor use only This instrument was designed for pollution degree 2 Meter Description 1 Display LCD 2 Lux Fc CD unit select button 3 MEM READ button for 99 reading memory 4 Up arrow button and MAX MIN AVG button 5 Power and Auto Power OFF control button 6 Zero Calibration button 7 Data Hold and Light source select button 8 Down arrow button 9 Coiled sensor connection cable 10 Photo detector N...

Page 4: ... Press and hold the button to enter the CD luminous intensity mode for further information Auto Power OFF To save battery life the meter powers down automatically after approximately 5 minutes of inactivity no button presses Enable Disable Auto Power Off With the meter ON press and hold the Power button until the APO clock symbol switches OFF the Auto Power OFF utility is now disabled and the user...

Page 5: ...of the LCD Now use the arrow buttons to scroll through the stored readings The lower left hand corner of the LCD while the main display digits show the stored reading for the selected memory location 3 To store an average AVG reading first access the AVG mode See MIN MAX AVG section of this guide and while an average reading is displaying AVG icon switched ON momentarily press the Mem Read button ...

Page 6: ...e are 10 light source selections L0 L9 each having a unique calibration correction factor multiplier See the Light Source list below The multipliers for locations L0 through L6 are fixed for the lighting types listed Locations L7 through L9 are extra locations that the user can customize with a multiplier from 0 001 to 1 999 To change the light source L S selection 1 Press and hold the Hold LS but...

Page 7: ...d be cleaned with a damp cloth when necessary Use only a mild soap if needed Do not use solvents abrasives or harsh detergents to clean the dome 2 Store the meter in an area with moderate temperature and relative humidity Battery Replacement When the battery power decreases to a critical level the battery symbol will appear as empty on the LCD Replace the 9V battery located in the rear battery com...

Page 8: ...ed to standard incandescent lamp 2856o K at an ambient temperature of 23o C 6 of Reading 3 digits Angle deviation from cosine characteristics Cosine Angular corrected per JIS C 1609 1993 and CNS 5119 general A class 30 2 60 6 80 25 LED Types Meter measures white red yellow green and blue LED light Operating conditions Temperature 41 to 104o F 5 to 40o C Humidity 80 RH Operation Altitude Storage Te...

Page 9: ...9 LT45 en US_V2 1 6 20 RELATIVE SENSITIVITY LT45 www com information itm com 1 800 561 8187 ...

Page 10: ...the Extech brand products we sell We offer NIST traceable calibration for most of our products Contact us for information on calibration and repair availability refer to the contact information below Annual calibrations should be performed to verify meter performance and accuracy Product specifications are subject to change without notice Please visit our website for the most up to date product in...

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