UPRtek MF250N User Manual And Warranty

* To ensure your warranty validation, please place your agent's stamp in the box and

fill in the purchase date. If the agent stamp and purchase date cannot be supplied,

the warranty period will based on the manufacturing date of the product.

* 為確保您的權益，請要求經銷商蓋上店章及填寫購買日期；未蓋店章與購買日期者，則以
出廠日期為依據。

* お客様の権利を確保するために、販売店に店の印章または、購入日を記入することを依
頼してください。販売店の印章または購入日のない場合、製造日に基とづいて取り扱い
いたします。

MF250N

Original / Authorized Agent Stamp

Product Serial Number：

Purchase Date：

TEL：[phone]

FAX：[phone]

Website：www.uprtek.com

Address：No.38, Keyi St., Zhunan Township, Miaoli County 35059, Taiwan, R.O.C

V1.4

FLICKER METER | FLICKER光譜計 | フリッカーメーター

User Manual and Warranty

使用說明書與保固手冊
使用説明書及び保証書

Contents

1

Introduction

1.1 Product Features

1.2 Packing Contents

1.3 Appearance Introduction

1.4 Annual Product Calibration

1.5 Product Notes and Precautions

..................................................... 1

.......................................... 2

.......................................... 3

............................. 4

.......................... 5

................... 6

2

Getting Started

2.1 Preparing Before Use

2.2 Quick Start

2.3 Measurement Mode

2.4 Taking a Measurement

2.5 Continuous Measurement

3

Miscellaneous

3.1 SYSTEM Setting

3.2 SYSTEM Reset

3.3 Light Sensor Head Assembly

4

Specification

4.1 Product Specification

4.2 General Attributes

5

Appendix Warranty

For more operation & firmware update
information, please visit www.uprtek.com

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Introduction

1

1.1 Features

1.2 Packing Contents

1.3 Appearance Introduction

1.4 Annual Product Calibration

1.5 Product Notes and Precautions

- 1 -

1.1 Features

■

Industry-leading launch Flicker measurement
instrument.

■

Support Flicker Index, Percent Flicker measurement.

■

Meets IES / ASSIST / ENERGY STAR / VESA

specificaon definion .

■

Standalone operaon, no need for smart phone or
PC connecon .

■

Light flicker frequency measurement.

■

Spectrum diagram and including five light
units-of-measure.

■

Flicker me & frequency domain real-me

monitoring.

■

C/P value highest.

1.2 Package Contentsns

MF250N

FLICKER Meter

Screen WiperCase

- 2 -

MF250N

FLICKER METER LED 光譜計 LED メーター

User Manual and Warranty

使用說明書與保固手冊
使用説明書及び保証書

User Manual
and Warranty

Protection BagUSB typeC cable

- 3 -

Strap

1.3 Appearance Introduction

1.4 Annual Product Calibration

“ ”selecon buon

selecon and acvates item

“ ”direconal buon” ”

perform operaon in menus

“ ”escape buon

return to the previous screen

sensor cover

strap holder

light sensor

LCD screen

“CAPTURE” buon

power on/off buon

tripod socket

The MF250N is a high-precision measurement device

with sensive components so to handle with care. To

ensure the accuracy of measurements, it is

recommended to have the unit calibrated once a year.

Please contact your agent or our customer service

department for calibraon service.

back cover

tripod socket

- 4 -

- 5 -

1.5 Product Notes and Precautions

The MF250N FLICKER Meter contains sensive

components. Please unpack with care, as any trauma

to the unit may damage the equipment. Contact your
agent if the unit appears not to be operang normally.
Do not aempt any repairs – all repairs must be
performed by qualified service agents.

Precauons / Warnings

Please read the following precauons to avoid fire,
excessive heat, chemical leakage and explosion.

■

Do not disassemble.

■

Do not expose the product to heat or water/
moisture.

■

If the unit is accidently immersed in water, or if
moisture has seeped inside, or metal objects have
penetrated the casing, immediately remove the
baery to avoid fire or electric shock.

■

Do not use paint thinner, benzene or other organic

solvents to clean the equipment as damage may
occur to the exterior finish.

■

Device screen isn’t touch panel, and do not press
firmly with a finger or nib to avoid screen broken.

Getting Started

2

2.1 Preparing Before Use

2.2 Quick Start

2.3 Measurement Mode

2.4 Taking a Measurement

2.5 Continuous Measurement

- 6 -

- 7 -

2.1 Preparing Before Use

2.1 Preparing Before Use

■ strap installation

3

2

1

4

■ battery installation

Open the battery cover and loaded 4 AA batteries.

1

2

3

4

5

■ installing the micro SD card

Insert the memory card according to the direction.

■ remove the micro SD card

Press to remove the SD card.

1

2

- 8 -

- 9 -

2.2 Quick Start

2.2 Quick Start

Place the sensor cover on the MF250N.

1

Press the On/Off button on the left side of the

2

unit, then the UPRtek splash screen will appear

on the display.

The unit will ask you if you want to perform a

3

"Dark Calibration". Prss "Selection " button.

When Dark Calibration is finished, the screen

4

will indicate main menu.

Press directional buttons to select in main

5

menu and then enter the mode by pressing

selection button.

“ ”selection button

“ “directional button” ”

Point light sensor towards light source.

6

Press the capture button on the right side of

7

the unit.

The results will be instantly displayed on the

8

screen.

Noce

Suggest to execute dark calibraon when every me turn

on MF250N.

- 10 -

- 11 -

2.2 Quick Start

Press the "Selection " button for 2 seconds to

9

save measured data.

Noce

Saving data funcon only for BASIC, SPECTRUM and

FLICKER modes.

- 12 -

2.3 Measurement Mode

■ SPECTRUM

This screen displays spectrum graphics, λP and
I-Time value.

■ BASIC

This screen show a list of light measurements

record(CCT, CRI, LUX, λP, I-Time).

■ FLICKER

This mode is used to continuously capture

measurements. The screen list 5 items (Flicker

Index, Flicker Percentage, VESA FMA, FFT
Frequency, FFT Magnitude).

■ FFT

This mode is used to real-time monitoring
measurements. You can get the frequency
information such as relative intensity and

frequencies.

■ LIGHTWAVE

This mode is used to real-time monitoring
measurements. You can get continuity light

waveform, and period of wave.

2.4 Taking a Measurement

2.4 Taking a Measurement

■ BASIC mode

Steps of measurement in SPECTRUM mode is
the same as BASIC mode. The example only
describe BASIC mode.

The icon of BASIC mode will turn into green

1

when selected1. Press selection button2 and

then the screen will display3.

1

■ SPECTRUM mode

Point light sensor towards light source4. Press

2

the capture button5.

4

5

When press the capture button, the screen will

3

show "Capture" at the upper right corner6.
"Capture" change to "iTime" means in

processing the integration time (iTime)

search7. The status display "Standby" when
measuring completed8.

Capture iTime Standby

6 7 8

2

- 14 -

3

Noce

System will skip iTime search when user measurement

environment illuminance are similar with previous.

- 15 -

2.5 Continuous Measurement

2.5 Continuous Measurement

■ FLICKER

These three modes are real-time monitoring.
Steps of measurement in FFT and LIGHTWAVE
mode are the same as FLICKER mode. The
example only describe FLICKER mode.

Press directional buttons to select FLICLER

1

mode1 in main menu. The icon of FLICKER
mode will turn into green when selected2. Press
selection button3 and then the screen will

display4.

■ FFT

2

■ LIGHTWAVE

Point light sensor towards light source5.

2

5

8

7

This icon "Capture" at the upper right corner of

3

the screen means real-time monitoring6. When

press the capture button will hold
measurement state, the screen will show

"Hold"7 and press capture button again to
continue real-time monitoring8.

Capture Hold Capture

6 7 8

13

- 16 -

4

- 17 -

Miscellaneous

3

3.1 SYSTEM Setting

3.2 Sytem Reset

3.3 Light Sensor Head Assembly

3.1 SYSTEM Setting

Press direction button to select SYSTEM

1

mode in main menu and then enter SYSTEM
mode by pressing selection button .

: select the item

2

: determines the item selected

: adjust

3

: confirm the item adjusted

- 18 -

: exit the item

4

- 19 -

3.2 System Reset

3.3 Light Sensor Head Assembly

User can press this key to reset the system if

necessary.

- 20 -

The embedded sensor is designed flexibly for

light-oriented. Please be sure the sensor is connected

with the system before power on. Please make sure
the sensor face to the light before measuring.

MF250N is equipped with a detachable sensor head. If

necessary, you may connect the meter and the
detachable sensor head by the USB typeC cable as
shown below, but please connect them only when the

meter is powered off. Aer the connecon is made,
please boot up your MF250N and aer the dark
calibraon is completed you can start the remote

measuring control.

Female

Port

Noce

Suggest to execute dark calibraon when every me

1.
turn on MF250N.
The light sensor head and the meter has been paired,

2.
please do not mix with others.

Please ensure to turn off the power before you rotang

3.
the sensor head.

- 21 -

Male
Port

Specification

4.1 Product Specification

4.2 General Attributes

- 22 -

4

Sensor

Spectral Bandwidth

Receptor Size

Wavelength range

SpectrumFlickerGeneral

Integration time range

Measurement Range

Sampling rate

Frequency range

Frequency resolution

Measurement Range

Standard

Measure response

Measuring Modes

Measuring Capabilities

CMOS Linear Image Sensor

Approximately 15 nm（half bandwidth

φ6.6± 0.1mm

380~780 nm

6~1200 ms

70~70000 Lux

5 K/Sec

5~2000 Hz

5 Hz

30~60000 Lux

IES / ASSIST/ ENERGY STAR

<3.0 Sec

1. Basic Mode

2. Spectrum Mode

3. Flicker Mode

4. FFT Mode

5. Lightwave Mode

1. Flicker Index

2. Flicker Percentage

3. SVM

4. FFT Frequency

5. Flicker Frequency-domain Graphic

6. Flicker Time-domain Graphic

7. CCT

8. CRI (Ra)

9. Illuminance (LUX)

10. λP

11. iTime

12. Spectrum Graphics

- 23 -

）

Illuminance Accuracy

CCT Accuracy

CRI Accuracy @ Ra

Flicker Accuracy

Display

Battery

General

Dimension

Weight

Operating Temperature Range

Storage Temperature Range

± 5%

± 3.5%

Illuminant A @ 2856K

± 2.5%

at 20000 Lux

± 5%

2.8" TFT LCD, 240x320 Pixel

AA Battery x4

180*65*30mm ( H x W x D )

250 g ± 20 g

0~35

℃

-10~40

℃

The company reserves the right to change product specifications

without prior notice.

Figure 1：Cosine Correction

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1

0

0

1

1

5

1

0

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5

2

0

3

5

3

0

4

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5

5

5

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6

5

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0

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5

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0

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5

8

0

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5

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0

Ideal value

MF250N

4.2 General Attributes

CCT
Correlated Color Temperature

CRI
Color Rendering Index

Lux
Illuminance

λp

The Peak of Wavelength

iTime (ms)
Integration Time of CMOS

Findex
Flicker Index

Fpercent
Flicker Percentage

SVM
Stroboscopic Visibility Measure

Freq (Hz)
The Primary Frequency

- 24 -

Twave (ms)

The Period Time

- 25 -

Appendix Warranty

5

Warranty Policy

UPRtek provides replacement or repair services to
our customers for defective products within the

applicable warranty period.

1. DOA (Dead on Arrival) Returns：

■

In the event that you receive a product that is not
working properly or is defective, you should notify

our service staff upon receipt of the products. If

defects in the product are discovered within 7 days

after receiving the product (except those due to

willful damage or customer misuse), you should
notify us by email, facsimile, or phone immediately

upon noticing the defect, so we can process the

return as a DOA product. You will be issued a DOA
number accordingly.

■

DOA products must be returned within 30 days of

purchase and in original condition. For products

considered as “Dead on Arrival”, we will replace
it with a new product (in whole package) at no
charge and pay return and re-delivery shipping

costs. International customers should allow for
additional transit time due to international
customs clearance.

2. RMA (Return Merchandise Authorization)：

■

For merchandise sent for repair or replacement

with or without warranty, you must first obtain an
RMA number by contacting our service staff by

mail. The following information is required in order

to complete your RMA request: company name,
contact person, phone number and e-mail,
customer ship-to address, product model number,

serial number, and a brief description of the

problem you are experiencing with the product
you wish to return.

■

All returned products will be tested by our
professional technicians to verify the complaint /
defect in question. However, if the defect in

question cannot be found by our technicians, you
are responsible for paying a testing fee plus
shipping fee for NDF (No-Defect Found) products.

■

Claims for loss or damage during shipment must

be made to the courier by the customer. For your
protection, we strongly recommend that you fully
insure your return shipment for damages. Please
use a courier that is able to provide you with proof
of delivery.

Limitation of Warranty

Please note that UPRtek is not responsible for

providing repairs under warranty if the product
defect is caused by any of the following factors：

1.

Damage caused by natural calamity or any

inappropriate usage.

2.

Product has been repaired or taken apart by
unauthorized technicians.

3.

The warranty label is altered, damaged or missing.

4.

Product serial number does not conform to our

original system or the label has been damaged.

Disclaimer

■

UPRtek shall in no event be liable for any defect,

damage or data loss that has occurred during the

delivery of in-warranty products. Prior to claiming
warranty service, UPRtek recommends that you
make a backup of your data and remove your data
from in-warranty products.

■

Under the maximum allowable range of applicable

laws and regulations, any business loss, expected
cost loss, data disappearance, or any other indirect,

accidental, or derived loss or damages due to the

utilization of or related to the company product,
shall not be the responsibility of UPRtek for any

compensation.

Customers Eligible for Warranty Service

UPRtek warranty policy applies to all customers who
purchased from either UPRtek or through authorized

agents of UPRtek.

Duration of Warranty

MF250N HOST：

The MF250N FLICKER METER series all come with a
2-year product warranty.

Authorized Distributor / Dealer Services

■

Product-based functional testing - Performed by

distributors and dealers to determine whether the

product needs to be returned to the factory for

further calibration services or technical repairs (All

UPRtek authorized distributors/dealers have a
right to perform “Product-based functional
testing” for a reasonable charge).

■

RMA product delivery to and from factory ­Distributors/dealers can assist customers in

sending/receiving RMA products to/from the

UPRtek factory.

■

Authorized distributors/dealers are listed on our

website : www.uprtek.com

Additional Remarks

Product parts and components are not always
manufactured by UPRtek. On occasion, these 3rd
party components may need to be replaced but are
already discontinued by the supplier. In this case,

UPRtek assures customers that it will fulfill it’s repair

andreplacement responsibilities by using substitute
parts or components of equal level and quality.

Delivery Methods

Consumers can choose either of the two methods

indicated below to return the product to the factory
for RMA Service：

■

Customers can send the products through UPRtek
global distribution channels that will send and

return the products to and from the factory for
repair and warranty service.

■

Customers can return the product directly to the
UPRtek factory for servicing.

Rules on Product Repairs After The Warranty
Period

UPRtek provides product services after warranty

expiration at reasonable charges. In case of product
defects, the customers are still able to send products

back to the UPRtek factory for service. The repair
charges will be based on the type of defect, and in

some cases, maintenance fees will be charged.

However, purchasing a new product is advised under
these conditions:

■

If the MF250N series or its accessories are no
longer available.

If the product functionality is almost certain to be

■

impossible to recover from (e.g. total immersion in
water, undergoing extreme electrical shock, severe

contamination or corrosion damage).

If the product was dropped or sustained such a

■

traumatic impact causing major structural damage,
or if our technicians determine that normal

functionality cannot be recovered even after major

component replacement.

■

If multiple parts simultaneously fail due to normal

wear and tear, or poor handling.

■

Even if the product is within the service period of
the warranty, yet parts are no longer available.