OBELAB NIRSIT Monitors Software User Manual

OBELAB NIRSIT Monitors Software

Product Information

Specifications

• Software: NIRSIT Software
• Mode: Quick Mode
• Measurement: Cerebral oxygen saturation (rSO2)
• Data Display: Numeric format and graphical format in realtime

Product Usage Instructions

Using the Software in Quick Mode
In Quick Mode, the NIRSIT software monitors the subject’s cerebral oxygen saturation (rSO2) without an active account. rSO2 values are displayed in numeric format and graphical format in real time.

Step 1: Enable Quick Mode
To use NIRSIT in Quick Mode, follow these steps:

1. Select MENU BAR > SETTINGS.
2. Set Quick Mode to On.

Real-time Monitoring
On the START TO MEASURE screen, select GO to start real-time monitoring of the subject’s cerebral oxygen saturation (rSO2).

Quick Mode Screen Overview

will be displayed in the EVENT list below. (see 4.7 Configuring
Initial NIRSIT Settings)
2| Items pre-defined in EVENT and Setting are shown. Mark an event
by selecting on the Event. The selected event marker is displayed
on the corresponding time axis in graph format.
3| During initialization (for 30 seconds) after the start of the
measurement, the box maintains a green background and the values
are displayed as –. The background becomes red during measurement
if measurement results are deemed incorrect. This may occur when
the device is put on the subject incorrectly or the device is
exposed to bright sunlight.
4| The measurement date and duration are displayed.
5| BASELINE setting button
6| Set values obtained by selecting the basic-value setting
(BASELINE) button as basic values.
7| Variations between the current values and the reference values
are shown (blue indicates a decrease while red indicates an
increase).
8| Left and Right oxygen saturation values (rSO2) are shown.
9| Set the alarm on or off, according to the alarm conditions
specified in initial settings.
10| Left and right measurements are displayed in graph format,
where x axis denotes the measurement time period in minutes. Selected
events are displayed with green markers.

Saving Data
To save measurement data, follow these steps:

1. After the measurement is complete, either in Quick Mode or Normal Mode, select DONE at the bottom of the screen.

2. A window will pop up asking if you want to finish the measurement.
   To automatically save measurement data and display the main screen for the current mode, select DONE. Make sure that AutoSave is set to On in MENU BAR > SETTINGS.

3. Select DONE. The measurement stops and a pop-up window appears asking if you want to save the data.

4. Select YES. The data is automatically saved, and the device displays the main screen in the current mode.

Playing Back Saved Data
To play back saved data, follow these steps:

1. At the top of the screen, select MENU BAR > DATA.
2. To play data, you must confirm the password for the logged-in observer account.
3. Enter the password for the logged-in observer account, and then select DONE at the bottom of the screen.
4. Select the data item to play. The selected data will be played. The data list is sorted by the subject name and measurement date.
5. Select whether to apply additional functions, used during measurement, according to the Replay option setting (On/Off) under MENU BAR > SETTINGS. See 4.7 Configuring Initial NIRSIT Settings for details.

Using the Software in Quick Mode

In Quick Mode, the NIRSIT software monitors the subject’s cerebral oxygen saturation (rSO2) without an active account. In Quick Mode, rSO2 values are displayed in numeric format and graphical format in real time.

To use NIRSIT in Quick Mode, select MENU BAR > SETTINGS and set Quick Mode to On.

Real-time Monitoring
On the START TO MEASURE screen, select GO.

Quick Mode Screen Overview

displayed in the EVENT list below. (see 4.7 Configuring Initial NIRSIT Settings)

2

| Items pre-defined in EVENT and Setting are shown. Mark an event by selecting on the Event. The selected event marker is displayed on the corresponding time axis in graph format.

3

| During initialization (for 30 seconds) after the start of the measurement, the box maintains a green background and the values are displayed as “–.” The background becomes red during measurement if measurement results are deemed incorrect. This may occur when the device is put on the subject incorrectly or the device is exposed to a bright sunlight.
4| The measurement date and duration are displayed.
5| BASELINE setting button
6| Set values obtained by selecting the basic-value setting (BASELINE) button as basic values.
7| Variations between the current values and the reference values are shown (blue indicates a decrease while red indicates an increase).
8| Left and Right oxygen saturation values (rSO2) are shown.
9| Set the alarm on or off, according to the alarm conditions specified in initial settings.

10

| Left and right measurements are displayed in graph format, where x axis denotes measurement time period in minutes. Selected events are displayed with green markers).

Saving Data
Save measurement data.

1. After the measurement is complete, either in Quick Mode or Normal Mode, select DONE at the bottom of the screen. A window will pop up asking if you want to finish measurement. NOTE
   To automatically save measurement data and display the main screen for the current mode, select DONE. Make sure that Auto Save is set to Onin MENU BAR > SETTINGS.

2. Select DONE. The measurement stops and a pop-up window appears asking if you want to save the data.

3. Select YES. The data is automatically saved and the device displays the main screen in the current mode.

Playing Back Saved Data

1. At the top of the screen, select MENU BAR > DATA. To play data, you must confirm the password for the logged-in observer account.

2. Enter the password for the logged-in observer account, and then select DONE at the bottom of the screen. Select the data item to play. The selected data will be played. Data list is sorted by the subject name and measurement date. Select whether to apply additional functions, used during measurement, according to the Replay option setting (On/Off) under MENU BAR > SETTINGS. See “4.7 Configuring Initial NIRSIT Settings” for details. NOTE
   

   • M next to the subject name denotes MONITORING Mode Data
   • B next to the subject name denotes TASK Mode > BEHAVIORAL Task Data
   • C next to the subject name denotes TASK Mode > COGNITIVE Task

Adding
Notes can be added to saved data.

1. Select the icon next to the measurement data item and add any information to identify the measurement data. Select DONE when complete.

Exporting
Saved data can be exported as a file for further analysis. Exported files are saved in the tablet My Files > Device Storage > NIRS folder > nirsit_export.db. The nirsit_export.db file can be converted to .csv format. See “8.2 Using the NIRSIT DB Browser” for details.

1. Press and hold the measurement data item file name to export. The data item will be selected and a red vertical line will appear at the left corner of the selected data item.
2. Use the same method in step 1 to select as many data items as you want to export. To select all items, select the checkbox (ㅁ) in the top left of the SAVED DATA screen.
3. Select EXPORT at the bottom of the screen.

Deleting
Saved data can be deleted.

1. Press and hold the measurement data item to delete. The data item will be selected.
2. Use the same method in Step 1 to select as many data items as you want to delete. To select all items, select the checkbox (ㅁ) in the top left of the SAVED DATA screen.
3. Select DELETE at the bottom of the screen.

Edit Subject

Editing the subject

1. Select MENU BAR >EDIT SUBJECT.
2. Enter the password for the logged-in observer account and select DONE.
3. Select the subject name.
4. Edit their information on the QUESTIONNAIRE window.
5. After editing the information, select DONE.

Deleting the subject(s)

1. Select MENU BAR >EDIT SUBJECT.

2. Enter the password for the logged-in observer account and select DONE.

3. To delete one of the subjects, select and hold the desired subject name until the red vertical line is displayed in front of the subject name To delete multiple subjects
   First, select and hold one of the subject names until the red vertical line is displayed in front of the subject name. And then select any other desired subject name(s). To delete all the subjects
   Select and hold one of the subject name. And then check the check box (ㅁ) on the left of the EDIT SUBJECT window.

4. After selecting the subject name, select DELETE at the bottom of the screen.

5. The message “Do you want to delete?” appears. To delete it, select CONFIRM. To cancel, select CANCEL.

NOTE
To deselect a subject, select the subject name again and the red vertical line on the left will disappear. To deselect all the subjects, press back button ( ) on the tablet itself.

Searching the subject

1. Select MENU BAR >EDIT SUBJECT.
2. Enter the password for the logged-in observer account and select DONE.
3. Select SEARCH at the bottom of the screen.
4. Enter the subject name (regardless of last name or first name).

Checking and Updating the Software Version

• Select MENU BAR > VERSION. Use the VERSION screen to view the latest updated versions for NIRSIT-EYE and NIRSIT-FIRMWARE. If the current version is not the latest, use the Update button to update. NIRSIT-EYE can only be updated when the device is connected.

Maintenance

Replacing Accessories and Components
Replacing Straps
Replace with a new strap if the current strap is dirty, damaged or feels loose. A strap can be removed by following the installation instructions in reverse order

Replacing the Disposable Patch (sold separately)
Disposable patches are for single use only. Replace the patch after each use to ensure proper hygiene. To purchase accessories, please contact OBELAB or an authorized dealer.

1. Remove the used disposable patch.
2. Attach a new disposable patch on the sensor unit inside the device by aligning the holes.
3. Press all the sensors to ensure that the disposable patch is securely attached to the sensors.

Cleaning
Make sure to turn off the NIRSIT device before cleaning. The device must be cleaned and stored after use. If not properly cleaned, or if exposed to direct sunlight, the device may become discolored.

Cleaning Silicon Caps
Wipe with an alcohol-moistened soft cloth. Silicon caps are frequently in contact with subjects. Take extra care to maintain hygiene.

Cleaning NIRSIT

1. Wipe with a soft cloth moistened with a non-abrasive cleaning solution mixed with water.
   WARNING

   • Make sure that liquid does not enter the device. This can cause device failure.
   • Do not spray directly on the device.
   • Do not use abrasive agents e.g. acetone as they can damage the surface.

2. Use a dry cloth to wipe off the moisture.

3. To remove foreign objects from the sensor, use a cotton ball soaked with alcohol.

NOTE
NIRSIT can be sterilized with ultraviolet rays.

Troubleshooting

The battery will not charge.

| The battery has expired.| Contact OBELAB or an authorized dealer.

The cable is damaged or severed.

| If you have a spare, replace the cable. If you do not have a spare, purchase a new cable.
This environment is not suitable to store or operate the product.| Meet environmental requirements.

Cannot connect with the tablet.

| The Wi-Fi feature is turned off.| Turn on the tablet’s Wi-Fi.
Sometimes a wireless connection cannot be established due to environmental factors (e.g. congested areas such as a big event venue).| ****

Use a USB cable for a wired connection.

NOTE
Information related to after-sales services and other technical information on the device can be found in the service manual provided by OBELAB

Product Specifications

Mechanical Characteristics

Technical Characteristics

Source

| Source Type| Dual wavelength VCSEL laser
Number of Sources| 24
Laser Output| 1 mW
Wavelength| 780 nm, 850 nm
Operation Mode| CW

Detector

| Detector Type| Active detection sensor
Number of Detectors| 32
Number of channels| Up to 204 channels

Measurement

| Source-Detector distance| 1.5 cm, 2.12 cm, 3 cm, 3.35 cm
System Scan Rate| Up to 8.138 Hz
Operation Mode| CW

Electrical Characteristics

Battery

| Type| Lithium-ion polymer battery
Usage Time| Up to 8 hours (when fully charged)
Voltage| 3.7 V
Capacity| 3000 mAh
Data Storage| Built-in memory in Tablet or PC storage
Communication| Wireless| WLAN (2.4 GHz 802.11b/g/n)
Item| Description
---|---
 | Wired| Serial Communication

Tablet Requirements

NOTE
The provided tablet is to be used only with NIRSIT. Do not use this tablet for other purposes. Please do not install other apps. Other apps may disrupt NIRSIT performance.

Environmental Requirements

Guidance and Manufacturer’s Declaration

Guidance and Manufacturer’s Declaration – Electromagnetic Emissions
This system is intended for use in the electromagnetic environment specified below. The customer or user of the system should ensure that it is used in such an environment.

Emissions test| Compliance| Electromagnetic environment – guidance
---|---|---
RF emission|

Group 1

| This system uses RF energy only for its internal functions. Therefore, its RF emissions are very low and are not likely to cause any interference in nearby electronic equipment.
CISPR 11
RF emission|

Class A

|

This system is suitable for use in all establishments other than domestic establishments and those directly connected to the public low-voltage power supply network.

CISPR 11
Harmonic emissions|

N/A

IEC 61000-3-2
Voltage fluctuations

/ Flicker emissions

|

N/A

IEC 61000-3-3
Immunity test| Compliance level| Electromagnetic environment – guidance
---|---|---

Electrostatic discharge (ESD)

IEC 61000-4-2

|

±6 kV contact

±8 kV air

| The floors should be wood, concrete or ceramic tile. If floors

are covered with synthetic material, the relative humidity

should be at least 30%.

The use of cables and components other than those specified for this system is not recommended. Using cables or components that do not meet the system specifications may affect emission quality.

Guidance and Manufacturer’s Declaration – Electronmagnetic Immunity
This system is intended for use in the electromagnetic environment specified below. The customer or user of the system should ensure that it is used in such an environment.

Immunity test| Compliance level| Electromagnetic environment – guidance
---|---|---

Electrostatic discharge (ESD)

IEC 61000-4-2

|

±6 kV contact

±8 kV air

| The floors should be wood, concrete or ceramic tile. If floors

are covered with synthetic material, the relative humidity

should be at least 30%.

NOTE

1. UT is the AC mains voltage prior to application of the test level.
2. The use of cables and components other than those specified for the current system is not recommended. Using cables or components other than those specified for the current system may affect the immunity

Guidance and Manufacturer’s Declaration – Electronmagnetic Immunity – Equipment & Systems that are NOT life-supporting
This system is intended for use in the electromagnetic environment specified below. The customer or user of the system should ensure that it is used in such an environment.

Immunity test

| Compliance level|

Electromagnetic environment – guidance

---|---|---

Radiated RF IEC 61000-4-3

|

3 V/m

| 80 MHz – 800 MHz: d = 1.2

800 MHz – 2.5 GHz: d = 2.3 where P is the maximum output power rating of the transmitter in watts (W) and d is the recommended separation distance in meters (m), based on the transmitter manufacturer’s standard.

Field strengths from fixed RF transmitters, as determined by an electromagnetic site survey a, should be less than the compliance level in each frequency range.

Interference may occur in the vicinity of equipment marked with the following symbol:

NOTE

1. At 80 MHz and 800 MHz, the higher frequency range applies.
2. These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures, objects, and people.
3. The use of cables and components other than those specified for the system is not recommended. This may result in decreased electromagnetic immunity of the system.

a

| Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile radios, amateur radio, AM and FM radio broadcasts, and TV broadcasts, cannot be predicted theoretically with any degree of accuracy.

To assess the electromagnetic environment due to fixed RF transmitters, an electromagnetic site survey should be considered.

If the measured field strength in the location in which the system is used exceeds the applicable RF compliance level above, the system should be observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating the system.

---|---

b

| Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.

Recommended separation distances between portable and mobile RF communications equipment and the system
For systems that are not NOT life supporting
This system is intended for use in an electromagnetic environment in which radiated RF  disturbances are controlled. The customer or user of the system can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the system as recommended below, according to the maximum output power of the communications equipment.

Rated max. the output power of the transmitter (W)| Separation distance according to frequency of the transmitter (m)
---|---
150 kHz – 80 MHz

d = 1.2 √P

| 80 MHz – 800 MHz

d = 1.2 √P

| 800 MHz – 2.5 GHz

d = 2.3 √P

0.01| 0.12| 0.12| 0.23
0.1| 0.38| 0.38| 0.73
1| 1.2| 1.2| 2.3
10| 3.8| 3.8| 7.3
100| 12| 12| 23

For transmitters rated at a maximum output power not listed above, the recommended separation distance d in meters (m) can be estimated using the equation applicable to the frequency of the transmitter, where P is the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer’s standard.

Guidance and Manufacturer’s Declaration – Specific Absorption Rate (SAR)
The product’s specific absorption rate (SAR), which measures the amount of electromagnetic waves absorbed by the human body, satisfies the “Electromagnetic Wave Protection Standards” set by the Ministry of Science and ICT. The product was tested according to the “SAR Measurement Standards” of the National Radio Research Agency, with the maximum output condition and in proximity to the head. The maximum SAR measurement value for the head absorption rate at 2.4 GHz WLAN frequency is as follows:

Model Name

| Head SAR (2.4 ㎓ WLAN)
---|---

NS1-H20B

| Location: Rear#1 (right contact position) / Mid Ch. (2442.0 MHz) SAR: 0.259 W/kg (Grade 1)

In South Korea, the SAR (Specific Absorption Rate) is regulated to a stricter standard of 1.6 W/kg, which is lower than the international recommended standard of 2 W/kg It is important to note that in everyday use, the actual SAR is significantly lower than the maximum output condition during testing.
More detailed information about SAR can be found on the website of the National Radio Research Agency (www.rra.go.kr) or the manufacturer’s website

Using the NIRSIT DB Browser

NIRSIT DB Browser is a computer-based application designed to view data in the nirsit_export.db file, sent from NIRSIT, on your computer. You can also convert the file to CSV format for use as material for research on cerebral activity. On the computer desktop, double-click the application icon to launch the NIRSIT DB Browser.

Loading the Database File

1. Click the Load button.
2. Move to the directory where the nirsit_export.db file is located, select the file, and then click Open (O).
3. In the Selected Data area, click the desired data item. Specific information appears on the right.

Converting to CSV Format
Click Convert to CSV. Convert the nirsit_export.db file to CSV format.

NOTE
The converted file can be found in the same folder as the database file.

 FAQ

Q: What is Quick Mode in NIRSIT Software?

A: Quick Mode in NIRSIT Software allows monitoring of cerebral oxygen saturation (rSO2) without an active account.

Q: How can I enable Quick Mode?

A: To enable Quick Mode, select MENU BAR > SETTINGS and set Quick Mode to On.

Q: How do I save measurement data?

A: After the measurement is complete, select DONE at the bottom of the screen. A pop-up window will appear asking if you want to save the data. Select YES to automatically save the data.

Q: How can I play back saved data?

A: Select MENU BAR > DATA at the top of the screen. Enter the password for the logged-in observer account and select DONE. Then, select the data item to play.

References

• 국립전파연구원 홈페이지

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