Extech Instruments HD450 Bedienungsanleitung

User's Guide

eavy

Duty Datalogging L

ight

eter

with PC Interface

Model HD450

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HD450-en-GB_V1.6 4/15

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 WindowsTM 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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Operation

Meter Power

1. Press the Power button to turn the meter ON or OFF

2. If the meter does not switch on when the power button is pressed or if the low battery icon is

displayed on the LCD, replace the battery.

Auto Power Off (APO)

1. The meter is equipped with an automatic power off (APO) feature that turns the meter off after

20 minutes of inactivity. The

icon appears while APO is enabled.

2. To disable the APO feature, simultaneously press and release the RANGE/APO and

REC/SETUP buttons. Press and release again to re-activate the APO feature.

Unit of Measure

Press the UNITS button to change the unit of measure from Lux to Fc or from Fc to Lux

Range Selection

Press the RANGE button to select the measurement range. There are four (range) selections for

each unit of measure. The range icons will appear to identify the range selected.

Taking a Measurement

1. Remove the sensor s protective cap to expose the white sensor dome

2. Place the sensor in a horizontal position under the source of light to be measured

3. Read the light level on the LCD display (numerically or with the bargraph).

4. The meter will display OL when the measurement is outside of the meter s specified range or if

the meter is set to the wrong range. Change the range by pressing the RANGE button to find

the best range for the application.

5. Replace the protective sensor cap when the meter is not in use.

Data Hold

To freeze the LCD display, momentarily press the HOLD button. 'MANU HOLD' will appear on the

LCD. Momentarily press the HOLD button again to return to normal operation.

Peak Hold

The Peak Hold function allows the meter to capture short duration light flashes. The meter can

capture peaks down to 10mS in duration.

1. Press the PEAK button to activate the Peak Hold feature. Manu and Pmax will appear on

the display. Press the PEAK button again and Manu and Pmin will appear. Use Pmax to

capture positive peaks. Use Pmin to capture negative peaks.

2. When the peak has been captured, the value and associated time will remain in the display

until a higher peak is recorded. The bargraph display will remain active displaying the current

light level.

3. To exit the Peak Hold mode and return to the normal operating mode, press the PEAK button a

third time.

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Maximum (MAX) and Minimum (MIN) Reading Memory

The MAX-MIN function allows the meter to store the highest (MAX) and lowest (MIN) readings.

1. Press the MAX-MIN button to activate the feature. Manu and MAX will appear on the

display and the meter will only display the highest reading encountered.

2. Press the MAX-MIN button again. Manu and MIN will appear on the display and the meter

will only display the lowest reading encountered.

3. When the MAX or MIN has been captured, the value and associated time will remain in the

display until a higher value is recorded. The bargraph display will remain active displaying the

current light level.

4. To exit this mode and return to the normal operating mode, press the MAX-MIN button a third

time.

Relative Mode

The Relative Mode function allows the user to store a reference value in the meter. All displayed

readings will be relative to the stored reading.

1. Take the measurement, and when the desired reference value is displayed, press the REL

button.

2. Manu will appear on the LCD display.

3. All subsequent readings will be offset by the by an amount equal to the reference level. For

example, if the reference level is 100 Lux, all subsequent readings will equal the actual reading

minus 100 Lux.

4. To exit the Relative Mode, press the REL button.

LCD Backlight

The meter is equipped with a backlight feature that lights up the LCD display.

1. Press the backlight button to activate the backlight.

2. Press the backlight button again to switch the backlight off. Note that the backlight will turn off

automatically after a short period of time in order to save battery energy.

3. The backlight function uses extra battery energy. To conserve energy, use the backlight

feature sparingly.

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Clock and Sample Rate Setup

In this mode, the and arrow buttons will allow adjustment of the selected (flashing) digits.

The and buttons will scroll to the next or previous selection.

1. Power the meter, then press and the REC/SETUP and UNITS buttons simultaneously to enter

the Setup mode. The hours display will flash.

2. Adjust and step through each selection as needed.

3. Press and hold the REC/SETUP and UNITS buttons simultaneously to exit the Setup mode.

The order of selection with the flashing (icon) is:

Hour (0 to 23) 12:13:14 (Time)

Minute (0 to 59) 12:13:14 (Time)

Second (1 to 59) 12:13:14 (Time)

Sample Rate (00 to 99 seconds) 02 (Sampling)

Month (1 to 12) 1 03 10 (Day)

Day (1 to 31) 1 03 10 (Day)

Day of the week (1 to 7 1 03 10 (Day) (Sunday = 1)

Year (00 to 99) 2013 (Year)

99 Point Memory

Up to 99 readings can be stored manually for later viewing directly on the meter s LCD. This data

can also be transferred to a PC using the supplied software program.

1. With the meter ON, press the REC button momentarily to store a reading

2. The MEM display icon will appear with the memory address number (01 -99)

3. If the 99-reading memory is full, the MEM icon and memory location number will not appear

4. To view stored readings, press and hold the LOAD button until the MEM display icon appears

alongside the memory address number.

5. Use the up and down arrow buttons to scroll through the stored readings.

6. To clear the data, press and hold the REC/SETUP and LOAD buttons simultaneously until CL

appears in the memory location field on the LCD

16,000 Point Datalogger

The HD450 can automatically record up to 16,000 readings in its internal memory. To view the data,

the readings must be transferred to a PC via the supplied software.

1. Using the SETUP mode, set the time and sample rate. The default sample rate is 1 sec.

2. To begin recording, Press and Hold the REC button until the MEM display icon begins blinking.

Data will store at the sample rate while the MEM icon is blinking.

3. To stop recording. Press and Hold the REC button until the MEM icon disappears.

4. If the memory is full, OL will appears as the memory number.

5. To clear the memory, with the meter off, press and hold the REC button and then press the

power button. dEL will appear in the display. Release the REC button when MEM appears

in the display, the memory has been cleared.

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USB PC Interface

Description

The HD450 meter can be connected to a PC via its USB interface. A USB cable, along with

WindowsTM software, is included with the meter. The software allows the user to:

Transfer previously stored readings from the meter s internal memory to a PC

View, plot, analyze, store, and print readings data

Remotely control the meter via virtual software buttons

Record readings as they are taken. Subsequently, printing, storing, analyzing, etc. the

readings data

Meter to PC Connection

The supplied USB cable is used to connect the meter to a PC. Connect the smaller connector end

of the cable to the meter s interface port (located under the tab at the left-hand side of the meter).

The larger connector end of the cable connects to a PC USB port.

Program Software

The supplied software allows the user to view readings in real-time on a PC. The readings can be

analyzed, zoomed, stored, and printed. Please refer to the HELP UTILITY available from inside the

software program for detailed software instructions. The main software screen is shown below for

preview.

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Specifications

Range Specifications

Units Range Resolution Accuracy

Lux 400.0 0.1 ± (5% rdg + 10 digits)

4000 1

40.00k 0.01k ± (10% rdg + 10 digits)

400.0k 0.1k

Foot candles 40.00 0.01 ± (5% rdg + 10 digits)

400.0 0.1

4000 1 ± (10% rdg + 10 digits)

40.00k 0.01k

Notes:

1. Sensor Calibrated to standard incandescent lamp (color temperature: 2856K)

2. 1Fc = 10.76 Lux

General Specifications

Display 4000 count LCD display with 40 segment bargraph

Ranging Four ranges, manual selection

Over range indication LCD displays OL

Spectral response CIE photopic (CIE human eye response curve)

Spectral accuracy V function (f 16%)

Cosine response f 22%; Cosine corrected for angular incidence of light

Measurement Repeatability ±3%

Display rate Approximately 750 msec for digital and bargraph displays

Photo detector Silicon photo-diode with spectral response filter

Operating conditions Temperature: 0 to 40oC (32 to 104oF); Humidity: < 80%RH

Storage conditions Temperature: (-10 to 50oC (14 to 140oF); Humidity: < 80%RH

Meter Dimensions 170 x 80 x 40mm (6.7 x 3.2 x 1.6")

Detector Dimensions 115 x 60 x 20mm (4.5 x 2.4 x 0.8 )

Weight Approx. 390g (13.8 oz.) with battery

Sensor lead length 1m (3.2 )

Low battery indication Battery symbol appears on the LCD

Power supply 9V battery

Battery Life 100hrs (backlight off)

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Maintenance

Cleaning

The Meter and its sensor can be cleaned with a damp cloth. A mild detergent may be used but

avoid solvents, abrasives, and harsh chemicals.

Battery Installation / Replacement

The battery compartment is located on the back of the meter. The compartment is easily accessed

by pressing and sliding the rear battery compartment cover off of the meter in the direction of the

arrow. Replace or install the 9V battery and close the battery compartment by sliding the

compartment cover back onto 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

batteries are sold.

Disposal: Do not dispose of this instrument in household waste. The user is obligated to take end-of-

life devices to a designated collection point for the disposal of electrical and electronic equipment.

Other Battery Safety Reminders

o Never dispose of batteries in a fire. Batteries may explode or leak.

o Never mix battery types. Always install new batteries of the same type.

Storing

When the meter is to be stored for a period of time, please remove the battery and affix the sensor s

protective cover. Avoid storing the meter in areas of extreme temperature and humidity.

ISO 9001 Certified

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