REED K7020 Manuel utilisateur

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Model K7020

Illuminometer

Instruction

Manual

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Table of Contents

Features......................................................................................... 2

Specications.............................................................................3-4

General Specications ................................................................ 3

Electrical Specications............................................................... 3

Spectrum for Light Sensor .......................................................... 4

Instrument Description .................................................................. 4

Measuring Procedures .................................................................. 4

Measuring Consideration .............................................................. 5

Battery Replacement..................................................................... 5

Correction Factor for Different Types of Lighting .......................... 5

Features

• Sensor used the exclusive photo diode & color correction lter,

spectrum meet C. I. E. Photopic

• Both Lux & Foot-candle measurement, wide range

• Analog output, can connect the external recorder

• High accuracy in measuring

• Separate LIGHT SENSOR allows user to measure the light at an

optimum position

• Fast & Slow response time selector

• LSI circuit provides high reliability and durability

• LCD display allows clear read-out even at high ambient light level

• Pocket size, easy to carry out & operation

• Compact, light weight and excellent operation

• Built-in low battery indicator

For service on this or any other REED product or information on other

REED products, contact REED Instruments at info@reedinstruments.com.

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Specifications

General Specifications

Display 13 mm (0.5”) LCD (Liquid Crystal Display)

Measurement Lux, Ft-candle (Fc)

Ranges Lux-0 to 50,000 Lux, 3 ranges

Foot-candle: 0 -5,000 Fc, 3 ranges

Sensor

Used the exclusive photo diode & color correction

lter, spectrum designed to meet C. I. E.

Zero Adjustment Automatic adjustment

Sampling Time Approx. 0.4 sec.

Response Time Fast & Slow selector

Over input indication Indication of “1”

Analog Output 0.1 mV/1 digits, max. output: 200 mV

Operating Temperature 0 to 50°C (32°F to 122°F)

Operating Humidity Less than 80% RH

Power Supply 006P DC 9V battery

Power Current Approx. DC 2 mA

Weight 220 g/0.52 lbs.

Dimensions Meter: 163 x 70 x 30 mm (6.4 x 2.8 x1.2”)

Sensor probe: 85 x 55 x 12 mm (3.2 x 2.2 x 0.5”)

Accessories Sensor probe included

Optional carrying case also available (Model CA-03)

Electrical Specifications

Lux

Range In-range Display Resolution Accuracy

2,000 Lux 0-1,999 Lux 1 Lux ± 5 % + 2 digits

20,000 Lux 2,000-19,990 Lux 10 Lux ± 5 % + 2 digits

50,000 Lux 20,000-50,000 Lux 100 Lux ± 5 % + 2 digits

Foot-candle (Fc)

Range In-range Display Resolution Accuracy

200 Fc 0-199.9 Fc 0.1 Fc ± 5 % + 2 digits

2,000 Fc 200-1,999 Fc 1 Fc ± 5 % + 2 digits

5,000 Fc 2,000-5,000 Fc 10 Fc ±5 % + 2 digits

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Spectrum

for Light Sensor

Instrument Description

1 - Display

2 - Data Hold Switch

3 - Power Off/Range Switch

4 - LUX/Fc Switch & Response Time Switch

5 - Analog Output Terminal

6 - Battery Compartment/Cover

7 - Light Sensor

Measuring Procedures

1. Determine Lux or Ft-candle on slide switch (#4, above), Determine the

response time on slide switch (#4, above), typical select to the “SLOW”

position.

2. Select the max. range on the “Range Switch” (#3, above).

3. Hold the “Light Sensor” (#6, above) by hand & face the measuring light

oppositely, then the Display (#1, above) will show light values directly.

During the measurement, if slide the “Data Hold Switch” (#2, above) to

the “HOLD” position, then will freeze the display reading permanently.

Slide the “Hold Switch” to the left side releasing the data hold function again.

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Measuring Consideration

1. As the range of 20,000 Lux (2000 Fc) is designed to measure the light

values 000 Lux (200 Fc). So if the measured light values less than 2000

Lux (200 Fc), please select the “Range Switch” to the lower range to let

display reading show high resolution & be kept within high accuracy.

As the range of 50,000 Lux(5000 Fc) is designed to measure the light val-

ues 0,000 Lux (2,000 Fc). So if the measured light values less than 20,000

Lux (2,000 Fc) please select the “Range Switch” to the lower range to let

display reading show high resolution & be kept within high accuracy.

Battery Replacement

1. When the left corner of the LCD display shows LO BAT “ ”, it

indicates the battery output less than 6.5 V - 7.5 V. Replacement of the

battery is then needed. However measurements could still be taken for

another few hours before the meter becomes inaccurate.

2. Open the Battery Cover (#6 in gure on page 4) at the back of meter

and remove the battery.

3. Replace with a 9V battery and reinstall the cover.

Correction Factor for Different Types of Lighting

The light meter is calibrated under a precision “Standard light tungsten

incandescent source of 2856°K”. If the user intends to make

measurements precisely under a different light source from

“MERCURY LAMP” or “FLUORESCENT LAMP” or

“SODIUM LAMP” or “DAYLIGHT”

the measurement value can be corrected (multiplied) using the follow-

ing factors that compare the measuring reading values tested under the

“Standard light tungsten source of 2856°K”.

MERCURY LAMP x 1.05

FLUORESCENT LAMP x 0.97

SODIUM LAMP x 1.11

DAYLIGHT x 0.95

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Notes _________________________________________

________________________________________________

Table des matières

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