Pro's Kit MT-4617 User manual
MT-4617 Light Intensity Meter
User’s Manual
1st Edition,2018
© 2018 Prokit’s Industries Co., Ltd
1
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
2
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
t
-10～50℃(14～122°F)
<80%RH(non-condensed)
Storage
environment
-10～+50℃(14～122°F)
<70%RH(non-condensed)
3
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.
4
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?
5
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;
6
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
7
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.
8
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.
9
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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