Ethos 4420 User Manual

1

Table of Contents

Table of Contents………………….……..……..1

Introduction……………....………………..……3

Limited Warranty, Rights and Responsibilities….4
Open-package inspection…………….…………4
Safety information………………………………5
1 Introduction……………………….…………8

1.1 Product description……………….…..……..8

1.2

Outstanding features of MS6612

multi-function

light meter…………………..…….

9

1.3 Name and function of components………...10

1.3.1 Plan view

……………………………..……….

.10

1.3.2 LCD display interface…………….……...11
2 Measurement methods……………………..12

2.1 Notices prior to measurement……………...12

2.2 Action principles………………..………….13

2.2.1 Concepts of illuminance scales..................13

2.2.2 Unit conversion for illuminance scales…..13

2.2.3 Conversion formula for illuminance
and light intensity…………..….….…..…13

2.3 Typical practice cases……………….......…13

2

3 Specific Application……………….………17

3.1 Application of manual switchover
of range measurement mode………..…….17

3.2

Application of relative/peak value

measurement mode…………..…………..….19

3.3 Application of maximum/minimum
value inquiry mode………………..………21

3.4 Application of data hold and zero
calibration mode…………..………………22

4 Other Functions……………………………24

4.1 Auto power-off…………………………….24

5 Technical Data……………..………………25
6 Maintenance and Service………….……….27

6.1 Service……………………….…….………27

6.2 Cleaning…………………………..….…….27

6.3 Battery replacement………………….…….28

6.4 Calibration Interval………………….……..29

7 Reference Table for Illumination

Standard of Various Locations………….…30

3

Introduction

Thank you for your purchase of the ETHOS 4420

multi-functional light meter. This meter will, with proper
use, provide years of reliable service; therefore, it is
recommended that the user read carefully the user’s
manual before using the light meter and keep it in right
place for reference.

4

Limited Warranty, Rights and Responsibilities

The product is guaranteed for one year from date of

purchase against defects in material or workmanship. This
warranty does not extend to damage caused by fire
(fusing), disposable battery (exhausted), accidents,
negligence, misuse, modification, pollution and abnormal
operation. Dealers are not authorized to extend the
warranty coverage on ETHOS’s behalf. During the
applicable limited warranty period, the user may contact
the nearest ETHOS service center to obtain approval of
information, and send the product to the center along with
fault description.

Open-package inspection

Upon reception 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.

Attachments

Instruction manual×1

One 9 V alkaline cell, GL6F22A 1604A

5

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 4420 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 o

negligence will lead to meter

damage or

wrong measurement results, etc.

Tips

Operation suggestions or prompts

6

Operation considerations

User should observe the following notices to
guarantee safe operation and obtain optimum
performance.

1: 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.

2: Placement

Operation
al
temperatu
re and
humidity
range

-10～50℃ (14～122°F)
<80%RH (non-condensed)

Storage
temperatur
e and
humidity
range

-10～+50℃ (14～122°F)
<70%RH (non-condensed)

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

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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 conditions. 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 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 damp. If the low battery symbol

appears on the display, the user should replace batteries.

8

Tips

1. The sensibility 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).

1 Introduction

1.1 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 taking 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 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

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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 4420 multi-functional light 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.

1.2 Outstanding features of the MS6612
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);

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 Low battery indicator;
 Touch tone and mute function;
 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.

13 Name and function of components

1.3.1 Plan view



Opto-sensor protection cover



Opto-sensor



LCD display screen



Compound key for main

power and touch tone:
Power on/off: Short press the
key to activate the machine
and long press for 1 second to
shut it down.
Touch tone on/off: Under
working mode, short press
the key to turn
on and off the touch tone.



max and min values inquiry key



Lux/Fc unit conversion key



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

MS6612 plan