mtts 4meter Manuale utente
4-meter. User Manual
User Manual
Effective date: January 2022
Issue Number: 03 Version: 00 EN
Issue Date: January 2022 www.mtts-asia.com
Model: LM-800
meter
V-3-00-EN
4-meter. User Manual
Contents
Company Information
Introduction
Device Description
Warnings
Operation
Alarm System
Optional Accessories
Cleaning
Maintenance and Service
Explanation of Symbols
Warranty Policy
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4-meter. User Manual
The 4-meter major function is a spectroradiometer for measuring the
irradiance (radiant power) of neonatal phototherapy lights and bili-
beds.
In additon the device can be connected to the other optional sensors
for:
- Oxygen measurement
- Flow measurement
- Pressure measurment
IntroductionCompany Information
MEDICAL TECHNOLOGY TRANSFER AND SERVICES Co., LTD
House No. 26, Alley 41, An Duong Vuong Street,
Tay Ho District, Hanoi City, Vietnam
Ph.: +84 24 3766 6521
Fax: +84 24 3718 8050
Email: [email protected]
www.mtts-asia.com
Logic s.r.l.
Via Antonio Pigafetta 1
34147 Trieste, 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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4-meter. User Manual
Sensor
Device Description
Overview
4-meter is single measurement unit suitable for overhead and bed
type phototherapy. It has 2 sensors located on both sides of the unit.
Device Description
Display
Sensor
Batteries
compartment
panel, do not press hard
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Display
1 Battery status Battery usage information
2 Top sensor bar Top sensor measurement information including light
source, value and estimated bandwidth
3 Bottom sensor bar Bottom sensor measurement information including
light source, value and estimated bandwidth
4 Total measurement bar
Total measurement value (top + bottom) with the
measurement unit
Touch this area to hold the measurement values
5Menu Touch this button to enter Menu screen
6Multi-point mode Touch this button to enter Multi-point mode screen
7 Status Touch this button to enter Status screen
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Measurement
Indicator
ON/OFF button
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3
4
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Device Description
Explosion hazard. Do not use this device in the presence of
Read and be familiar with this instruction manual before
using this device.
Inspect this device before each use to ensure proper
functioning.
!
!
!
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.
Warnings
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Measuring Irradiance
4-meter is a spectroradiometer that measures the therapeutic irradi-
ance (radiant power) of neonatal phototherapy lights. It measures the
irradiance of the wavelengths from 400 to 520 nanometers (nm), the
blue-green portion of the spectrum, which includes the principal ac-
tion spectrum of bilirubin. The device accounts for cosine correction
allowing more light from different angles.
Units of Measurement
4-meter measures relative irradiance (µW/cm2/nm) and absolute ir-
radiance (µW/cm2).
When referring to the relative irradiance, a nanometer is a measure
of wavelength equal to one-billionth of a centimetre. The term “per
nanometer” indicates the average irradiance per nanometer across
the spectral band being measured, which is 120 nm wide. This makes
it possible to compare average irradiance across spectral bands of
different widths.
Instrument Response Characteristics
4-meter, which matches the action spectrum of bilirubin as closely
as possible.
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50
75
100
400 410 420 430 440
Wavelength
%
440 450 460 470 480 490 500 510 520 530
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4-meter. User Manual
3. Read irradiance measurement from the display. Adjust the aim of
4-meter sensor to obtain the maximum reading.
4. The values can be ‘frozen’ on the display. Touch the total measure-
ment area to stop the measurement and hold the values.
Operation
If more than one phototherapy light is being used on the
infant, take separate measurements for each light and chart
each reading.
operations. When the ‘hold the values’ function is active, the
indicator stays red.
Operation
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Taking Measurements - Overhead Phototherapy
1. Turning the unit ON and OFF
To turn on: press the ON/OFF button
To turn off: press and hold ON/OFF button
2. Hold the unit against the infant’s body as near to the umbilical as
below).
- 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.
Sensor aimed for
maximum reading Photothrapy
lights
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4-meter. User Manual
Taking Measurements - Bili-Bed Phototherapy
1. Turning the unit ON and OFF
To turn on: press the ON/OFF button
To turn off: press and hold ON/OFF button
2. Place 4-meter in the middle of the lighted side of the pad or mat-
or mattress.
3. Read irradiance measurement from the display. Adjust the aim of
4-meter to obtain the maximum reading.
4. Take two additional readings at different places on the pad, then
average all three readings.
5. The values can be ‘frozen’ on the display. Touch the total measure-
ment area to stop the measurement and hold the values.
Phototherapy bed
lighted side up
4-meter
If a Bili-Bed is being used at the same time as an overhead
phototherapy light 4-meter displays combined value of both
devices.
operations. When the ‘hold the values’ function is active, the
indicator stays red.
Operation Operation
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Operation Operation
Additional options
4-meter offers a selection of choices for different types of measure-
ments.
Bandwidth estimator and units of measurement
4-meter measures the bandwidth of 400-520 nm. As opposed to the
narrow-banded. The aim of 4-meter is to estimate light source band-
width to get meaningful average values.
Given the complexity of the light measurement 4-meter offers the
user the choice of 2 measurement units:
- µW/cm2/nm for relative irradiance measurement and
- µW/cm2for absolute irradiance measurement
In the example below:
- the estimated bandwidth of the light source is 60 nm
- the top relative irradiance measured is 20 µW/cm2/nm
- the bottom relative irradiance measured is 40 µW/cm2/nm
- the total relative irradiance measured is 60 µW/cm2/nm
- the total absolute irradiance measured is 3,600 µW/cm2
Change unit
Changes units between
relative irradiance (µW/cm2/nm) and
absolute irradiance (µW/cm2)
Top sensor Activates / deactivates the top sensor. When the Top sensor is
deactivated, the top sensor bar is gray.
Bottom sensor Activates / deactivates the bottom sensor. When the bottom sensor is
deactivated, the Bottom sensor bar is gray.
Set relative Sets the current measurement as reference values
Show relative Shows / hides the relative ratio of current measurement to the
previously set reference value
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Operation Operation
Activating/deactivating sensors
4-meter measures the irradiance using 2 sensors:
- top for overhead phototherapy units
- bottom for bed-type phototherapy units
- top and bottom - for double sided phototherapy units
Both sensors (top and bottom) are active when the device
is turned on.
To disable the top sensor and use only the bottom sensor touch the
menu icon and select ‘Top sensor’ from the list.
To disable the bottom sensor and use only the top sensor touch the
menu icon and select ‘Bottom sensor’ from the list.
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Operation Operation
Relative measurement
Relative measurement can be used to determine/verify treatment size
of a phototherapy device.
The example below explains the process for a single sided photo ther-
apy device.
1. Select: Menu - ‘Bottom sensor’ to disable the bottom sensor (see
above)
2. Place 4-meter unit under a phototherapy device in centre position.
3. Select: Menu - ‘Set relative’ to set the current measurement as ref-
erence value
4. Select: Menu - ‘Show relative’ to show the ratio between current
measurement and reference value.
The ratio is shown on the left side of the top sensor bar (‘1.00’).
5. Move 4-meter unit away from centre position, the irradiance should
decrease. This will also be indicated by a decreasing ratio.
In this example 4-meter unit was moved away from centre to a posi-
tion where irradiance is 60% of the centre (reference) irradiance point.
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