mtts Light Meter Manuel utilisateur
Light Meter. User Manual
User Manual
Effective date: October 2019
Issue Number: 01 Version: 02 EN
Issue Date: November 2019 www.mtts-asia.com
MTTS Light Meter
V-1-02-EN
Light Meter. User Manual
Contents
Company Information
Introduction
Device Description
Warnings
Operation
Alarm System
Cleaning
Maintenance and Service
Explanation of Symbols
Warranty Policy
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Light Meter. User Manual
The MTTS Light Meter is a spectroradiometer for measuring the irra-
diance (radiant power) of neonatal phototherapy lights and bili-beds.
IntroductionCompany Information
MEDICAL TECHNOLOGY TRANSFER AND SERVICES Co., LTD
House No. 26, Alley 41, An Duong Vuong Street,
Tay Ho District, Hanoi City, Vietnam
Tel: +84 24 3766 6521
Fax: +84 24 3718 8050
Email: [email protected]om
www.mtts-asia.com
PROMETEO SRL
Via Mantova 9
38122 Trento
Italy
This user manual is intended for health care professionals.
-
tions should be read before use.
WARNING - a warning statement refers to the conditions when
the possibility of injury to the patient or user exists if a proce-
dure is not followed correctly.
NOTE - a note statement provides additional information in-
tended to clarify points, procedures or instructions.
!
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Light Meter. User Manual
Sensor
Device Description
Device Description
The MTTS Light Meter is single measurement unit suitable for over-
head and bed type phototherapy. It has 2 sensors loc on both sides of
the meter.
Device Description
Display
ON/OFF button
Sensor
Batteries compartment
touch panel, do not press hard
Measuring Irradiance
The MTTS Light Meter is a spectroradiometer that measures the ther-
apeutic irradiance (radiant power) of neonatal phototherapy lights. It
measures the irradiance of the wavelengths from 440 to 465 nanom-
eters (nm), the blue-green portion of the spectrum, which includes the
principal action spectrum of bilirubin.
Units of Measurement
The MTTS Light Meter measures irradiance in units of microwatts
per square centimeter per nanometer (µW/cm2/nm). A nanometer is
a measure of wavelength equal to one-billionth of a centimeter. The
term “per nanometer” indicates the average irradiance per nanom-
eter across the spectral band being measured, which is 50 nm wide.
This makes it possible to compare average irradiance across spectral
bands of different widths.
Instrument Response Characteristics
the MTTS Light Meter, which matches the action spectrum of bilirubin
as closely as possible.
390
10
20
30
40
400 410 420 430 440
Wavelength
%
440 450 460 470 480 490
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Light Meter. User Manual
Warnings
Explosion hazard. Do not use this device in the presence of
Read and be familiar with this instruction manual before
using this device.
Only use this device under the direct supervision of a
licensed medical practitioner.
Inspect this device before each use to ensure proper
functioning.
!
!
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!
The hospital/facility is responsible for ensuring that all per-
sonnel who operate or maintain this device are trained in its
operation and safe use, and for maintaining training records
of attendance and evidence of understanding.
Operation
Taking Measurements - Overhead Phototherapy
1. Turn the MTTS Light Meter on.
2. Hold the MTTS Light Meter against the infant’s body as near to the
umbilical as possible and aim the Light Meter at the center of the
- For reproducible measurements, always hold the sensor on the
same place on the infant’s body.
- Changes in the distance or angle of the light to the patient will
change the irradiance the patient receives, requiring new measure-
ments to be taken.
touch panel, do not press hard
Phototherapy light
Sensor aimed for
maximum reading
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3. Read irradiance measurement from the display. Adjust the aim of
the MTTS Light Meter sensor to obtain the maximum reading.
4. Press on/off button to turn MTTS Light Meter off. MTTS Light Meter
automatically shuts off after 1 minute to preserve battery life.
Operation
If more than one phototherapy light is being used on the
infant, take separate measurements for each light and chart
each reading.
Taking Measurements - Bili-Bed Phototherapy
1. Turn the MTTS Light Meter on.
2. Place the MTTS Light Meter in the middle of the lighted side of the
on the pad or mattress.
3. Read irradiance measurement from the display. Adjust the aim of
the Light Meter sensor to obtain the maximum reading.
4. Take two additional readings at different places on the pad, then
average all three readings.
5. Press on/off button to turn the Light Meter off. The Light Meter au-
tomatically shuts off after 1 minute to preserve battery life.
touch panel, do not press hard
Phototherapy bed
lighted side up
MTTS light meter
If a Bili-Bed is being used at the same time as an overhead
phototherapy light the Light Meter displays combined value
of both units.
Operation
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Light Meter. User Manual
Alarm System
LOW BAT - Battery power is low; replace the battery (see page 10).
Cleaning
Required items:
To clean the Light Meter:
it off.
2. Dampen the cloth with either the mild soap-and-water solution or
detergent, then wipe down all exterior surfaces of the Light Meter.
Mild
Detergent
Clean
Cloth
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Maintenance and Service
Replacing the Batteries
device.
Read and be familiar with this instruction manual before us-
ing this device.
The printed circuit boards (PCBs) contain static sensitive
parts. Always use appropriate electrostatic discharge pro-
tection, such as an electrical-grounding wrist strap, when
working with internal components.
!
!
!
Required items:
2 x AA/LR6/1.5V alkaline, non-rechargeable batteries
To replace the battery:
1. Remove the back cover
2. Insert the new 1.5-volt batteries into the battery holder
Batteries cover
Batteries holder
Calibrating the Light Meter
Maintenance and Service
The MTTS Light Meter was factory calibrated to a radiometric stand-
ard in accordance to the National Institute of Standards and Technol-
To assure continued accurate measurement of irradiance, the MTTS
Light Meter should be recalibrated every 36 months to a radiometric
(irradiance) standard. Because certain calibration factors are stored
in the Light Meter memory, the Light Meter must be recalibrated at
MTTS. The date of the last calibration is labeled on the Calibration
Both the readout and sensor should be returned for calibration. The
Light Meters under warranty are recalibrated at no cost. Others are
recalibrated at nominal cost. For information on returning the Light
Meter, see below.
Service and Repair
The MTTS Light Meter has no customer serviceable parts, and must
be returned to MTTS for all repairs and parts replacement. After any
service, the Light Meter must be recalibrated radiometrically to as-
sure accurate measurement of irradiance.
Customer attempts to service the Light Meter will invalidate
the warranty and may result in irreparable damage
!
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Returning for Service
Maintenance and Service
When sending equipment for service:
- Contact MTTS Technical Service for a Return Merchandise Authori-
zation (RMA) number and the location where the equipment should
be sent.
- Clean the device, securely package it, and include the RMA number
on the outside of the box.
- In the Asia, ship the equipment to:
Medical Technology Transfer and Services (MTTS) Ltd
No 26 Lane 41 An Duong Vuong
Tay Ho, Hanoi
Specications
Specications
Control Settings
Wavelength spectrum
Measuring range
Accuracy
Displays
Characteristics
Features
Indicators
440–465 nm
0.0 – 150.0 µW/cm²/nm
+/- 2%
Liquid-crystal display (LCD)
4 digits, indicator, automatic off after 1 min
low battery
Dimensions (HxWxD)
Total unit mass
12.5cm x 7.0cm x 2.4cm
225 g
Battery
Operational Duration
2 x 1.5V alkaline battery, non-rechargeable
Up to 120h
Operating
Transport and storage
Exclusions
Ambient temperature 0°C to 40°C
Humidity: 0% to 90% RH non condensing
Atmospheric Pressure: 70-106kPa
Ambient temperature 0°C to +50°C
Humidity: 0% to 90% RH non condensing
Atmospheric Pressure: 70-106kPa
None
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Standards for Reference
ISO 13485:2016
IEC 61010-1:2010 - General safety
IEC 61326-1:2012 - EMC
Specications Explanation of Symbols
Explanation of Symbols
Do not disassemble Light Meter unless you are an MTTS
trained technician or have been instructed to by quali-
Device manufacturer.
Date of manufacture.
Keep out of direct sunlight.
This device should be disposed of separately from
normal household waste so that components can be
recycled.
Refer to User Manual before operating this device.
Serial Number
Power supply polarity
12V DC 5A 12 Volt, Direct Current, 5 Ampere
2265
Name and address of European Authorized Representative
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