Pro's Kit MT-4617LED Manuel utilisateur

MT-4617LED LED Light Intensity Meter

User’s Manual

1st Edition, 2018

Introduction

Thank you for your purchase of the MT-4617LED Light Intensity Meter

designed and manufactured by our company. This meter will with

proper use, provide years of reliable service; therefore, it is

recommended that the user read carefully the user manual before using

the light meter and keep it in right place for reference.

Open-package inspection

Upon receipt of the light meter, inspect it to ensure no damage

happened during shipping. If the user finds obvious damage or

malfunction in operation, please contact the supplier.

Safety information

Warning

Do not use the light meter in the environment full of dusts or having gas

substances and flammable steam substances!

Safety mark description

This manual contains basic information for MT-4617LED safety

operation and maintenance. Please read carefully following safety

information before use.

Table 1: Safety information

Important information which the user must read before

using the light meter

Mark of conformity

Table 2: Warning message

Warning

It indicates that incorrect operation will lead to

serious injury or even fatal accidents

Notice

It indicates that incorrect operation or negligence will

lead to meter damage or wrong measurement

results, etc.

Tips

Operation suggestions or prompts

Operation considerations

User should observe the following notices to guarantee safe operation

and obtain optimum performance.

Preliminary check

Before initial use, please check if the light meter operates normally and

if it is damaged during storage and transportation. In case of any

damage, please contact the supplier.

Placement

Operation

environment

-10～50℃ (14～122°F)

<80%RH(non-condensed)

Storage

environment

-10～+50℃ (14～122°F)

<70%RH(non-condensed)

To avoid faults, please DO NOT place the light meter in following

environments:

3:Use

Notice

1. The operation temperature range for the light meter is -10-50℃

(14-122°F).

2. In order to avoid damage, especially falling accidents, handling and

use should be avoided during severe mechanical vibration.

3. The light meter can only be calibrated and repaired by professional

personnel.

4. Before each use, the opto-sensor of light meter should be checked

for damage and dust. Make sure the meter is in good, smooth and

clean condition. If one or more functions of the light meter are

irregular or not ready for operation, avoid using the meter.

5. During the operation of the light meter, the meter measurement value

should not be at OL for a long time.

6. Keep the meter out of direct sunlight to guarantee its normal

operation and long-term service life.

7. If the meter is subject to effect of intensive electromagnetic field,

its functions will be affected.

8. Only use batteries specified in technical data.

9. Batteries should avoid dampness. If the low battery symbol appears

on the display, the user should replace batteries.

Tips

1. The sensitivity of the optical detector will be lessened due to

operation conditions or time. It is recommended to make periodic

calibration to maintain the basic accuracy.

2. Please keep original package for future mailing (such as for light

meter calibration).

Introduction

Product description

The MT-4617LED Light Intensity Meter has a friendly human-machine

interface and can be activated by a simple press of keys. The buzzer

activates upon key press to notify that it is effective. It designed for

measuring all visible light produced by all color of LED, fluorescent

lamp, metal-halide lamp, high voltage sodium lamp or electric

incandescent lamp. You can choose different types of light source

according your needs and set the light source parameters according to

the need as well.

Outstanding features:

 Automatic and manual range switching;

 Can measure a variety of different colors of light.

 Inquiry function for maximum and minimum values;

 Data hold function;

 Peak value measurement function;

 Relative value measurement function;

 Zero calibration function;

 3 1/2 bit LCD display, with analog bar display;

 Fc/Lux unit conversion function;

 Outrange indication (When the measured value exceeds the

current range, LCD will display the signal “OL” to indicate that the

range is overreached);

 High precision. Measurement range (0.00~200000Lux);

 Low battery indication;

 Key tone and mute selection;

 Auto power-off function (The machine will be powered off

automatically keys are not operated for more than 10 minutes)

 Compact design, durable, and portable.

Name and function of components

Plan view

1. Opto-sensor protection cover

2. Opto-sensor

3. LCD display screen

4. Compound key for main power and touch tone:

Power on/off: Short press the key to activate the instrument and long

press for 1 second to shut it down.

Touch tone on/off: Under working mode short press the key to turn

the touch tone on and off. Default is key with tone.

5. max and min values inquiry key

6. Lux/Fc unit conversion key

7. Compound key for data hold and zero calibration:

Data hold: Short press the key to enter/exit data

hold mode.

Zero calibration: Long press for 1 second to perform

Zero calibration function.

8. Compound key for relative value and peak value measurement:

Relative value measurement: short press the key to enter/exit

relative value measurement mode.

Peak value measurement: long press for 1 second to enter/exit peak

value measurement mode.

9. Key for manual range switching: Short press the key for 20.00Lux 

200.0Lux  2000Lux  20000Lux  200000Lux (or 20.00Fc 

200.0Fc  2000Fc 20000Fc) circulation; Long press for 1 second

to exit manual range switching mode.

LCD display interface

1. Prompt for manual range switching mode

2. Prompt for data hold mode

3. The analog bar shows the current measurement value information.

4. The digit shows the current measurement value information.

5. Lux unit

6. FC unit

Prompt for auto measurement mode

7. Prompt for peak value measurement mode

8. Prompt for low battery

9. Prompt for relative value measurement mode

10. Prompt for max and min values inquiry

11. Select light source.

12. Light source code.

2 Measurement methods

Notices prior to measurement

Warning

1: Do not use the light meter in environments full of dusts or

having gas substances and flammable steam substances!

2: Do not use the light meter for measurement in the place

with high temperature and high humidity.

3: Do not use the light meter in environments with intense infrared or

ultraviolet rays!

Tips

1: The opto-sensor of this meter is designed by simulating the sensitive

curve of light obtained through human eyes. The spectral coverage is

between 320mm and 730mm. When it is used for measurement

within the infrared range, there will be a large data deviation.

2: The opto-sensor is calibrated by common electric incandescent lamp

required by CIE under the color temperature of 2854°K; the provided

reading number may be different for the spectrum of other lamps.

3: The reference level of light source test is at the top of the spherical

surface illuminated.

4: The optical detector should be exposed to light for 2 minutes before

measurement.

5: Influence of tester's shadow and other factors on the optical detector

should be avoided.

Action principles

Concepts of illuminance scales

One lux indicates the illuminance from a surface of one square meter,

all points of which are one meter from a uniform source of one candela.

One foot-candle (Fc) indicates the illuminance from a surface of one

square foot, all points of which are one foot from a uniform source of

one candela.

Unit conversion for illuminance scales

1 Fc = 10.764 Lux

1 Lux = 0.09290 Fc

Conversion formula for illuminance and light intensity

E = I / r 2

E --- illumination value (Unit: Lux)；

I --- Light intensity of the light source（Unit: cd）；

r --- Distance from the luminous surface of light source to the optical

detector (Unit: m）.

During the measurement, the minimum distance between the luminous

surface of light source and the opto-sensor should be more than 15

times greater than maximum size of the luminous surface (or

opto-sensor).

Typical practice cases

Remove the protection cover of the MT-4617LED multi-functional light

meter sensor and place it at right angle to the light source.

Press and hold the MT-4617LED power key ④ for a short time to

power on the light meter. The LCD screen will illuminate（about 5

seconds）with the buzzer beeping twice, and “AUTO” will appear on the

middle of LCD display. This indicates that the auto measurement mode

is ON.

Press and hold the manual range switching key ⑨ of the MT-4617LED

for a short time, “MANU” will appear on the top left position of the LCD

display, indicating that the manual range switching mode has been

activated. In this mode, each time press and hold the key for a short

time, the meter will switch to 20.00Lux—> 200.0Lux—> 2000Lux—>

20000Lux—>200000Lux (or 20.00Fc—>200.0 Fc—>2000 Fc—>20000

Fc) in sequence; pressing the key for one second will result in the

inscription “MANU” disappearing from top left position of LCD display,

replaced by “AUTO” appearing on the top left position, to indicate that

the meter has switched the manual range switching mode to the auto

range switchover.

Press and hold the REL/PEAK key ⑧ of the MT-4617LED for a short

time, “REL” will appear on the top left position of the LCD interface,

indicating the activation of the relative value measurement mode. Press

and hold the key ⑧ for a short time again, the device will exit the

relative value measurement mode and return to the original

measurement mode, and “REL” on the top left position of the LCD

interface will disappear; pressing the key for one second will lead to the

peak measurement mode, “PEAK” and “MANU” will appear on top right

position of LCD display; press and hold the key for one second once

again, “PEAK” will disappear from the top right position of the LCD

interface, and “AUTO” will appear in the middle of LCD, and the mode

will return to auto measurement mode.

Press and hold max/min value inquiry key ⑤ for a short time, “MAX”

will appear on top position of LCD interface, switching the device to the

max/min value inquiry mode; in this mode, each short press of the key

causes the mode to change from MAX to MIN or from MIN to MAX;

press and hold the “MAX/MIN” key ⑤ for one second, “MAX/MIN” on

top position of the LCD interface will disappear, and the mode will exit.

Press and hold the data hold/zero calibration key ⑦ of the

MT-4617LED for a short time to enter the data hold mode, which will be

indicated by the apparition of “HOLD” on the top left position of the LCD

interface; press and hold the key for a short time once again, “HOLD”

will disappear from the top left position of the LCD interface, and the

device will exit the data hold mode.

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