Pro's Kit MT-4617 Manuale utente

MT-4617 Light Intensity Meter

User’s Manual

1st Edition,2018

Introduction

Thank you for your purchase of the MT-4617 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-4617 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

environmen

-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

Whether you are a professional or amateur photographer, while shooting,

you pay more attention to the surrounding illuminance rather than the

setting, because this will help you take the best shot. Although the

illuminance can be estimated by the photographer, there is a difference in

perception between human and camera about the requirement for

supplementing illuminance. This difference will lead to a big contrast of

the expected image effect against the actual one. In the face of this, do

you wish to possess a light meter? When you intend to buy a house, you

require both good location and indoor brightness during the day. So, do

you wish to possess a light meter to measure the illuminance in every

corner of the house?

With the progress of human civilization, more and more people

emphasize low carbon life.Architects tend to figure out how to bring more

natural light into the house while putting up a residential building.

However, in many cases, fluorescent lights will be used when the natural

light is not enough. In response to the slogan of energy saving and

emission reduction advocated by the state, we should use the fluorescent

lamps based on the actual needs. So, a professional and convenient light

meter can provide you with a reference regarding illuminance.

The MT-4617 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. This light meter is

able to measure the visible light produced by fluorescent lamp,

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

lamp for a vivid and intuitive image display.

Outstanding features of the MT-4617 multi-function light meter

Automatic and manual range switching;

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 indicator;

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

7. Prompt for auto measurement mode

8. Prompt for peak value measurement mode

9. Prompt for low battery

10. Prompt for relative value measurement mode

11. Prompt for max and min values inquiry

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 (lumen) 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.

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