User manual

HD450-EU V1.3– 04/10

Introduction

Congratulations on your purchase of the Extech HD450 Digital Light Meter. The HD450

measures illuminance in Lux and Foot candles (Fc). The HD450 is a Datalogger and

includes a PC interface and Windows

compatible software for downloading data. Up to

16,000 readings can be stored on the meter for download to a pc and 99 readings can

be stored and viewed directly on the meter’s LCD display.. This meter is shipped fully

tested and calibrated and, with proper use, will provide years of reliable service.

Meter Description

1. Sensor cable plug

2. USB jack for PC interface (under the flip-down

cover)

3. LCD Display

4. Upper function button set

5. Lower function button set

6. Power ON-OFF button

7. Light sensor

NOTE

: The battery compartment, tripod mount, and tilt

stand are located on the rear of the instrument

and are not pictured

Display Description

1. Clock setting modes

2. Clock display

3. Relative mode icon

4. Auto Power OFF (APO) icon

5. Low battery icon

6. Data Hold icon

7. PEAK HOLD modes

8. Range indicators

9. Unit of measure

10. Digital display

11. Bargraph display

12. Data download to PC icon

13. PC serial connection established

14. Memory address number

15. USB PC connection icon

16. Memory icon

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