ALAT UJI MS6612 User manual

i
MS6612
Multi-functional Light Meter
USER MANUAL
Office: Jl. Radin Inten II No. 62 Duren Sawit, Jakarta 13440 - Indonesia
Workshop: Jl. Pahlawan Revolusi No. 22B, Jakarta 13430 - Indonesia
Phone: [phone] (Hunting) Fax: [phone]
Mobile: [phone]
Fax: [phone]

MS6612 Multi-functional Light Meter
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Table of Contents
TABLE OF CONTENTS ......................................................................................1
INTRODUCTION.................................................................................................3
LIMITED WARRANTY, RIGHTS AND RESPONSIBILITIES.........................4
OPEN-PACKAGE INSPECTION........................................................................4
SAFETY INFORMATION ...................................................................................6
1 INTRODUCTION............................................................................................ 11
1.1 PRODUCT DESCRIPTION ..................................................................................................................11
1.2 OUTSTANDING FEATURES OF MS6612 MULTI-FUNCTION LIGHT METER ........................................ 12
1.3 NAME AND FUNCTION OF COMPONENTS........................................................................................ 12
1.3.1 Plan view............................................................................................................................... 12
1.3.2 LCD display interface........................................................................................................... 17
2 MEASUREMENT METHODS.......................................................................21
2.1 NOTICES PRIOR TO MEASUREMENT................................................................................................ 21
2.2 ACTION PRINCIPLES....................................................................................................................... 22
Office: Jl. Radin Inten II No. 62 Duren Sawit, Jakarta 13440 - Indonesia
Workshop: Jl. Pahlawan Revolusi No. 22B, Jakarta 13430 - Indonesia
Phone: [phone] (Hunting) Fax: [phone]
Mobile: [phone]
Fax: [phone]

Introduction
2
2.2.1 Concepts of illuminance scales............................................................................................. 22
2.2.2 Unit conversion for illuminance scales................................................................................. 22
2.2.3 Conversion formula for illuminance and light intensity ....................................................... 22
2.3 TYPICAL PRACTICE CASES ............................................................................................................. 24
3 SPECIFIC APPLICATION..............................................................................28
3.1 APPLICATION OF MANUAL SWITCHOVER OF RANGE MEASUREMENT MODE................................... 28
3.2 APPLICATION OF RELATIVE/PEAK VALUE MEASUREMENT MODE.................................................... 30
3.3 APPLICATION OF MAXIMUM/MINIMUM VALUE INQUIRY MODE....................................................... 31
3.4 APPLICATION OF DATA HOLD AND ZERO CALIBRATION MODE........................................................ 32
4 OTHER FUNCTIONS.....................................................................................33
4.1 AUTO POWER-OFF.......................................................................................................................... 33
5 TECHNICAL DATA........................................................................................34
6 MAINTENANCE AND SERVICE..................................................................36
6.1 SERVICE......................................................................................................................................... 36
6.2 CLEANING ..................................................................................................................................... 36
6.3 BATTERY REPLACEMENT ............................................................................................................... 37
6.4 CALIBRATION INTERVAL................................................................................................................ 38
7 REFERENCE TABLE FOR ILLUMINATION STANDARD
OF VARIOUS LOCATIONS ..............................................................................39
Office: Jl. Radin Inten II No. 62 Duren Sawit, Jakarta 13440 - Indonesia
Workshop: Jl. Pahlawan Revolusi No. 22B, Jakarta 13430 - Indonesia
Phone: [phone] (Hunting) Fax: [phone]
Mobile: [phone]
Fax: [phone]

Limited Warranty, Rights and Responsibilities
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 MASTECH’s behalf. During the applicable limited warranty
period, the user may contact the nearest MASTECH 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
One 9 V alkaline cell, GL6F22A 1604A
Instruction manual
×1
Office: Jl. Radin Inten II No. 62 Duren Sawit, Jakarta 13440 - Indonesia
Workshop: Jl. Pahlawan Revolusi No. 22B, Jakarta 13430 - Indonesia
Phone: [phone] (Hunting) Fax: [phone]
Mobile: [phone]
Fax: [phone]

MS6612 Multi-functional Light Meter
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Safety information
6
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 MS6612
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

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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.
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.

Safety information
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2: Placement
Operational temperature
and humidity range
-10～50℃(14～122°F )
<80%RH (non-condensed)
Storage temperature 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:
Direct sunlight
High temperature
Corrosive or
explosive gas
Mist /splash
High temperature/condensation
Intensive
electromagnetic
environment
Dust
Mechanical
vibration

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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.

Safety information
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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).

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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 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 MS6612 multi-functional light meter has a friendly human-machine interface and can be activated

Introduction
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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);
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.
1.3 Name and function of components
1.3.1 Plan view

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①Opto-sensor protection cover
②Opto-sensor
③LCD display screen
④Compound 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.
⑤max and min values inquiry key
⑥Lux/Fc unit conversion key
⑦Compound 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.
⑧Compound 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.
⑨Key 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.
MS6612 plan
1.3.2 LCD display
interface

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①Prompt for manual range switching mode
②Prompt for data hold mode
③The analog bar shows the current measurement value information.
④The digit shows the current measurement value information.
⑤Lux unit
⑥FC unit
⑦Prompt for auto measurement mode
⑧Prompt for peak value measurement mode
⑨Prompt for low battery
⑩Prompt for relative value measurement mode
11.12 Prompt for max and min values inquiry
LCD display interface

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2 Measurement methods
2.1 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

Measurement methods
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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 expose to light for 2 minutes before measurement.
5: Influence of tester's shadow and other factors on the optical detector should be avoided.
2.2 Action principles
2.2.1 Concepts of illuminance scales
One lux (lumen) indicates the illuminance got on 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 got on a surface of one square foot, all points of
which are one foot from a uniform source of one candela.
2.2.2 Unit conversion for illuminance scales
1 Fc = 10.764 lux
1 lux = 0.09290 Fc
2.2.3 Conversion formula for illuminance and light intensity
E = I / r 2
Wherein 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）.

Measurement methods
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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).
2.3 Typical practice cases
In the following practice cases, the user stands under a light source. Remove the protection cover of
the MS6612 multi-functional light meter sensor and place it at right angle to the light source, as shown in
figure 2-1.
Press and hold the MS6612 power key ④for 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 ⑨of the MS6612 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 in the middle, to
indicate that the meter has switched the manual range switching mode to the auto range switchover. Press
and hold the REL/PEAK key ⑧of the MS6612 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 ⑧for 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

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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 ⑤for 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 ⑦of the MS6612 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. In any mode with sensor covered, press and hold data hold/zero calibration
key ⑦for one second, “ADJ” will appear on the LCD interface, and the device will enter the zero
calibration mode: several seconds later “ADJ” will disappear from the LCD interface, and the device will
exit the data hold mode and return to auto measurement mode.

Measurement methods
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Figure 2-1
Tips
1: The reference position of light source test is at top of sphere surface under light.
2: In various measurement modes, analog bar in the middle of the LCD screen will change
with figures of Nixie tubes.
3: When reading, existing data can be locked by pressing and holding “HOLD/ZERO” key
for a short time;
4: In zero calibration mode, the opto-sensor must be covered by opto-sensor visor before
calibration.

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5: After completing the test, the sensor protection cover should be put back to protect light
filter and sensor.