UPRtek MK350D Dimensions and installation guide

52-72-00007-0100 V3.0
* To ensure your warranty validaon, 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.
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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
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The information contained herein is the exclusive property and confidential document of United Power
Research Technology Corporation, and shall not be distributed, reproduced，or disclosed in whole or in
part without prior written permission of United Power Research Technology Corporation.
LED Meter ・ LED 光譜計 ・ LEDメーター
User Manual and Warranty
使用說明書與保固手冊
使用說明書び保証書
MK350D

Introduction
1.1 Features
1.2 Package Contents
1.3 Product Description
1.4 Annual Product Calibration
1.5 Product Notes and Precautions
1
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2
3
4
5
6
Getting Started
2.1 Product Setup
2.2 Taking a Measurement
2
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7
8
10
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Additional Setup and Notes
3.1 MicroSD Card
3.2 Setting the Date / Time on your MK350D
3.3 More about Dark Calibration
3
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15
16
17
Miscellaneous
4.1 Tripod Attachment
4.2 System Reset
4.3 uSPECTRUM PC / Smart Device APPs
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19
20
21
Specification ...................................22
Warranty........................................26
Warning Statement
7.1 NCC Warning Statement
7.2 FCC Warning Statement
7
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32
33
Contents

- 1 -
1
Introduction
1.1 Features
1.2 Package Contents
1.3 Product Description
1.4 Annual Product Calibration
1.5 Product Notes and Precautions
- 2 -
1.1 Features
The MK350D is a lightweight, portable, easy-to-operate LED
meter with Bluetooth remote control operaons and Micro
SD Card data storage. This product has basic features for fast,
easy Light Measurements.
70g pocket size, the lightest handheld spectrometer in the
world.
Flicker measurement for disease prevenon and health
check.
Standalone operaon, no need smart phone or PC
connecon.
Supports Micro SD card, unlimited data storage for
measurement.
Spectrum diagram and including 27 light unit-of-measure.
Compable with smart device, wireless controlled by
Bluetooth.
Addional uSPECTRUM App and Soware for advance
analysis.
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- 3 -
1.2 Package Contentsns
Neck Strap USB Cable
Protection Bag
Case
User Manual
and Warranty
MK350D LED Meter
Power Adaptor
Neck Strap Screw
- 4 -
1.3 Product Description
micro SD card slot
screen
tripod aachment
lanyard aachment
reset hole
on / off buon
indicator light
measurement buon
USB port
sensor
sensor cover

- 5 -
1.4 Annual Product Calibration
This product is a high-precision measurement device with
sensive components – please 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.
1.5 Product Notes and Precautions
- 6 -
The MK350D LED 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 or modify the baery.
Do not expose the baery to heat (fire) or water/moisture.
If the unit is plugged into the power adapter and the baery seems to be
overheang, or if there is smoke or peculiar odors emanang from the unit,
unplug immediately to avoid the possibility of fire.
However, do not touch the cables if there is heat emanang from near the
cables as melted or deformed cables could expose wiring and result in burns
or electric shock.
Do not use cloth or anything to wrap or cover the equipment while charging
– this could cause the unit to overheat, melng the casing or causing fire.
If the unit is accidently immersed in water, or if moisture has seeped inside,
or metal objects have dropped into the casing, immediately remove the
baery to avoid fire or electric shock.
Do not operate or store the baery in high-temperature environments - it
will cause baery leakage and/or shorten the life of the baery .
Do not use paint thinner, benzene or other organic solvents to clean the
equipment– this may damage the exterior finish or touch screen, and may
even ignite fire.
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- 7 -
2
Getting Started
2.1 Product Setup
2.2 Taking a Measurement
2.1 Product Setup
- 8 -
1. Charging the internal baery
Remove the MK350D unit and the USB Charger supplied in
the packaging and connect one end of the Charger cable to
the MK350D and the other end into a wall socket with the
appropriate voltage. The indicator light will illuminate orange
indicang that it is charging. The light will turn green when
fully charged. For first me use, charge the baery for at
least 6 hours.
The indicator light will light up in orange,
and the light becomes green aer fully.
charging
charged.
If the unit is charging, a lightning bolt will appear over the
baery symbol charged.

- 9 -
2.1 Product Setup
2. Lanyard strap
You can aach a lanyard (neck strap)
onto the ring at the boom of the
MK350D.
2.2 Taking a Measurement
- 10 -
Aer the splash screen, a Dark
Calibraon label will display
indicang that a Dark
Calibraon is in progress.
Then turn on the MK350D by
pressing the On/Off buon on
the side of the unit. The
indicator light will illuminate
green and a UPRtek splash
screen will display.
Note : If you are using a USB Charger,
the MK350D will automacally turn
itself on.
Slide the “Sensor Cover” over
the sensor lens.

- 11 -
2.2 Taking a Measurement
The first screen will display
the Date & Time, Opc
Number and Version Number.
The baery level indicator is
on the right.
Slide the Sensor Cover so that
the Sensor is visible again.
When Dark Calibraon is
complete, the screen will
indicate.
2.2 Taking a Measurement
- 12 -
Press the On/Off buon once
to go to the next screen. The
next screen shows the
Wavelength Spectrum.
Aer which it will respond
with a beep to indicate
compleon.
The screen will display CCT,
CRI, LUX and LambdaP.
Note : you may get a message that the
Micro SD Card is not installed –
disregard this message for now.
Hold the MK350D as shown
with the Sensor facing toward
the front, in the direcon of a
light source and press the
“Measure” buon at the top
of MK350D.

- 13 -
2.2 Taking a Measurement
Press the On/Off buon once
to go to the next screen. The
next screen shows the CIE
1931 x, y coordinates and the
CIE 1976 u’, v’ coordinates.
Press the On/Off buon once
to go to the next screen. The
next screen shows the R9
value, LUX value, FC (foot
candle) value and the
Percentage Flicker.
1. While your unit is charging, you can start taking measurements with the
power adaptor plugged in or you can wait unl the unit is fully charged.
2. To turn off the MK350D, press the On / Off buon and keep it depressed
for at least 3 seconds.
- 14 -
3
Additional Setup and Notes
3.1 MicroSD Card
3.2 Setting the Date / Time on your MK350D
3.3 More about Dark Calibration

3.1 MicroSD Card
- 15 -
This unit can write LED measurement
data onto a MicroSD Card (only
support for above 1GB / up to 32G).
Simply insert the card into the MicroSD
card slot. All data that is captured is
wrien to excel files (.xls).
Even without a MicroSD Card, the
MK350D is able to capture data .
You can read the data via Micro SD card reader and find the
data on the SD Card under the “Data”directory. There will be
subdirectories marked with a sequenal number “e.g. 0001”.
Each directory can hold up to 100 capture files, aer which
the next sequenal subdirectory will be created (e.g. 0002).
Each capture will be contained in
its own Excel file with a
namingonvenon of ESPD_XXXX,
where XXXX is a sequenal
number (e.g. 0001, 0002).
Addional data such as Integraon
Time, R1-R15, LambdaPV and all of
the intensity data for each
wavelength in the Wavelength
Spectrum are all available in the file.
- 16 -
3.2 Setting the Date/Time on your MK350D
By plugging your MK350D connecon to uSPECTRUM PC
soware using the USB cable supplied, the MK350D will
automacally sync up its Date / Time from the PC.
The Date / Time will also sync from a smart device if you use
the smart device to make a Bluetooth connecon to the
MK350D.
connecon to uSPECTRUM connecon to smart device

3.3 More about Dark Calibration
- 17 -
It is good pracce to perform a dark calibraon every me
you turn on the MK350D, when you move to a different
temperature environment (hot to cold or cold to hot), or
when you move to a different light intensity environment
(light to dark or dark to light).
You also can use PC soware or smart device APPs to do dark
calibraon.
When Dark Calibraon is
complete, the screen will
indicate.
Slide the “Sensor Cover”
over the sensor lens.
Aer power on
Press the “Measure”
buon at the top of
MK350D.
- 18 -
4
Miscellaneous
4.1 Tripod Attachment
4.2 System Reset
4.3 uSPECTRUM PC / Smart Device APPs

4.1 Tripod Attachment
- 19 -
If you detach the lanyard screw on the boom of the
MK350D, it will expose a screw hole where you can aach a
tripod for hands-free LED measurements.
- 20 -
4.2 System Reset
If for any reason you need to perform a system reset, you can
use a pointer to press into the Reset Hole as shown right.

4.3 uSPECTRUM PC/Smart Device APPs
- 21 -
The MK350D can also interface with a PC using the
uSPECTRUM PC Soware, which provides a much richer
funconal and visual environment.
To obtain the uSPECTRUM soware, you must go to
www.uprtek.com.
The MK350D can also be remote controlled by an Apple IOS
or Android smart device, using a Bluetooth connecon.
connecon to uSPECTRUM
connecon to Smart Device APPs
- 22 -
5
Specifications

- 23 -
Illuminant A @ 2,856 K
at 20,000 lx*2
Sensor
Wavelength Range
Wavelength Data Increment
Spectral Bandwidth
Wavelength Reproducibility
Measurement Range
Illuminance Accuracy
Color Accuracy
Color Repeatability
CCT Accuracy
CRI Accuracy @ Ra
Stray Light
Integration Time Range
Digital Resolution
Frequency Range
Capture Function
Operation Mode
Integration Mode
CMOS Linear Image Sensor
380~780 nm
1 nm
Approximately 12 nm ( Half Bandwidth )
± 1 nm*1
70 to 70,000 lx
± 5%
± 0.0025 in CIE 1931 x,y
± 0.0005 in CIE 1931 x,y
± 2%
± 1%
-25 dB max.*3
6 to 1,000 ms
16 bits
10 to 165 Hz
One time / Continuous
Standalone Mode / Bluetooth Mode *4
/ USB Mode ( PC connection )
Auto / Manual
1. Illuminance ( LUX ) / Foot Candle ( fc )
2. Correlated Color Temperature ( CCT )
Spectrum
Flicker
Feature
- 24 -
Measuring Capabilities
Display
Max. Files
Battery Operation Time
Power
Data Output Interface
Data Format
Dimensions
Weight (with Battery)
Operating Temperature
/ Humidity
Storage Temperature
/ Humidity
Display Language
3. CIE Chromaticity Coordinates
(1) CIE 1931 x,y Coordinates
(2) CIE 1976 u',v' Coordinates
4. Color Rendering Index ( CRI , Ra）/ R9
5. Percent Flicker
6. Spectral Power Distribution ( SPD ) mW/m2
7. Peak Wavelength ( λp )
0.96" 128X64 mono OLED
≒1.2 million Files @ 8GB Micro SD Card ( Excel )
≦3 hours ( Fully Charged )
USB Power; 700 mAh
( 3.7V Rechargeable Li-ion Battery )
Micro SD Card ( SD 2.0, SDHC/up to 32G ) /
Mini USB Port ( USB 2.0 ) /
Bluetooth 3.0 and 4.0 compatible with iOS and Android
Compatible Excel
90 x 30 x 32.2 mm ( H x W x D )
70 g ± 5 g
0 to 35 ℃
, relative humidity 70% or less without condensation
-10 to 40 ℃
, relative humidity 70% or less without condensation
English
System Configurations

- 25 -
Figure 1：Cosine Correction
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MK350D Ideal Value
*1：Input source must be a stable light source.
*2：Temperature 23±2℃and relative humidity 50% or less.
*3：Input the 550nm monochromatic light and measure the stray light ratio at 550nm
± 40nm.
*4：It can be connected to mobile phones and tablet computer.
The company reserves the right to change product specifications at any time without
prior notice.
- 26 -
6
Warranty

- 27 -
Warranty Policy
UPRtek provides replacement or repair services to our
products within the applicable warranty period.
1. DOA (Dead on Arrival) Returns：
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In the event that you receive a product that is not working properly or is
product (except those due to willful damage or customer misuse), you
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
with a new product (in whole package) at no charge and pay return and
For merchandise sent for repair or replacement with or without warranty,
request: company name, contact person, phone number and e-mail,
customer ship-to address, product model number, serial number, and a
wish to return.
All returned products will be tested by our professional technicians to
cannot be found by our technicians, you are responsible for paying a
Claims for loss or damage during shipment must be made to the courier by
- 28 -
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.
2.
3.
4.
Disclaimer
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Customers Eligible for Warranty Service
UPRtek warranty policy applies to all customers who purchased from either
UPRtek or through authorized agents of UPRtek.
1. MK350 HOST：
The MK350 LED METER series all come with 3-year product warranty.
insure your return shipment for damages. Please use a courier that is able
to provide you with proof of delivery.
Damage caused by natural calamity or any inappropriate usage.
Product has been repaired or taken apart by unauthorized technicians.
The warranty label is altered, damaged or missing.
Product serial number does not conform to our original system or the label
has beendamaged.
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
any business loss, expected cost loss, data disappearance, or any other
related to the company product, shall not be the responsibility of UPRtek

- 29 -
2. Accessories：
UPRtek RMA policy is only for LED Meter repair and does not cover
maintenance or calibraon services (aside from one me free calibraon on
warranty). The policy also does not cover accessories like tripods and straps,
nor does it cover consumable items like baeries.
Authorized Distributor/Dealer Services
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Addional 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 disconnued by the supplier. In this case, UPRtek assures customers
that it will fulfill it’s repair and replacement responsibilies by using substute
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：
■
Product-based funconal tesng - Performed by distributors and dealers
to determine whether the product needs to be returned to the factory for
further calibraon services or technical repairs (All UPRtek authorized
distributors/dealers have a right to perform “Product-based funconal
tesng” 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
Customers can send the products through UPRtek global distribuon
channels that will send and return the products to and from the factory for
repair and warranty service.
- 30 -
■
Rules on Product Repairs Aer The Warranty Period
UPRtek provides product services aer warranty expiraon at reasonable
charges. In case of product defects, the customers are sll 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 condions:
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Customers can return the product directly to the UPRtek factory for
servicing.
If the MK350 series or its accessories are no longer available.
If the product funconality is almost certain to be impossible to recover
from (e.g. total immersion in water, undergoing extreme electrical shock,
severe contaminaon or corrosion damage).
If the product was dropped or sustained such a traumac impact causing
major structural damage, or if our technicians determine that normal
funconality cannot be recovered even aer major component
replacement.
If mulple 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.

- 31 -
7
Warning Statement
7.1 NCC Warning Statement
7.2 FCC Warning Statement
- 32 -
7.1 NCC Warning Statement
Arcle 12
Without permission, any company, firm or user shall not alter the
frequency, increase the power, or change the characteriscs and
funcons of the original design of the cerfied lower power
frequency electric machinery.
Arcle 14
The applicaon of low power frequency electric machineries shall
not affect the navigaon safety nor interfere a legal communicaon,
if an interference is found, the service will be suspended unl
improvement is made and the interference no longer exists.

- 33 -
7.2 FCC Warning Statement
a. for FCC 15b devices (15.105)
This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to part 15 of the FCC rules.
These limits are designed to provide reasonable protecon against
harmful interference in a residenal installaon. This equipment
generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instrucons, may cause
harmful interference to radio communicaons. However, there is no
guarantee that interference will not occur in a parcular installaon.
If this equipment does cause harmful interference to radio or
television recepon, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
● Reorient or relocate the receiving antenna.
● Increase the separaon between the equipment and receiver.
● Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
● Consult the dealer or an experienced radio/TV technician for help.
b. FCC Part 15.21 informaon for user
You are cauoned that changes or modificaons not expressly
approved by the party responsible for compliance could void your
authority to operate the equipment.
c. FCC Part 15.19
This device complies with Part 15 of the FCC Rules. Operaon is
subject to the following two condions:
- 34 -
7.2 FCC Warning Statement
(1) this device may not cause harmful interference and (2) this
device must accept any interference received, including interference
that may cause undesired operaon.
FCC RF Radiaon Exposure Statement
1. This Transmier must not be co?located or operang in
conjuncon with any other antenna or transmier.
2. This equipment complies with FCC RF radiaon exposure limits
set forth for an uncontrolled environment. This equipment should
be installed and operated with a minimum distance of 20
cenmeters between the radiator and your body.