Omega OS 531 User manual

Installation and operating
manual
Document
:
3403235
Language
:
Eng
Rev.
:
002
Date
:
7.4.2021
OS 531
Ultrasonic Leak Detector

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Dear Customer,
Thank you for choosing our product.
Before you start up the device, please read this manual in full and carefully observe instructions stated. The
manufacturer cannot be held liable for any damage that occurs as a result of non-observance or non-compliance with
this manual.
Should the device be tampered with in any manner other than a procedure that is described and specified in the
manual, the warranty is void and the manufacturer is exempt from liability.
The device is designed exclusively for the described application.
Omega air d.o.o offers no guarantee for the suitability for any other purpose. Omega air d.o.o. is also not liable for
consequential damage resulting from the delivery, capability or use of this device.

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Table of Contents
1Safety instructions..................................................................................................................................................... 5
2Application................................................................................................................................................................ 6
3Features ..................................................................................................................................................................... 6
4Technical data............................................................................................................................................................ 6
4.1 General data ...................................................................................................................................................... 6
4.2 Electrical data.................................................................................................................................................... 7
4.3 Performance data............................................................................................................................................... 7
5Scope of delivery....................................................................................................................................................... 7
6Learning about the device ......................................................................................................................................... 8
6.1 Components....................................................................................................................................................... 9
6.2 Touch screen display ......................................................................................................................................... 9
6.3 Dimension and electrical ports ........................................................................................................................ 11
7Before you start for the first time ............................................................................................................................ 11
7.1 Charging the device......................................................................................................................................... 11
7.2 Performing initial setup................................................................................................................................... 11
8Procedures of conducting a leak survey .................................................................................................................. 13
8.1 Using the OS 531 in the non-LMS mode ........................................................................................................ 13
8.2 Using the OS 531 in the LMS mode ............................................................................................................... 14
9Setting up and Starting a leak survey ...................................................................................................................... 15
9.1 Switching the OS 531 to the required mode.................................................................................................... 16
9.2 (Non-LMS mode only) Creating a survey....................................................................................................... 16
9.3 (LMS mode only) Downloading a survey from the LMS ............................................................................... 16
9.3.1 Remotely logging into the LMS via WLAN .......................................................................................... 16
9.3.2 Downloading the survey information from the LMS ............................................................................. 17
9.4 Specifying the survey settings......................................................................................................................... 18
9.5 Starting the survey........................................................................................................................................... 19
9.6 Stopping the survey......................................................................................................................................... 19
10 Detecting leaks ........................................................................................................................................................ 19
11 Recording leaks....................................................................................................................................................... 21
12 Managing leak records ............................................................................................................................................ 24
12.1 Viewing and editing a leak record............................................................................................................... 24
12.2 Copying leak records to a PC...................................................................................................................... 25
12.3 Uploading the leak records to the LMS ...................................................................................................... 26
13 Maintenance ............................................................................................................................................................ 26
13.1 Self-test ....................................................................................................................................................... 26
13.2 Updating the firmware ................................................................................................................................ 26
13.3 Resetting the device .................................................................................................................................... 29
13.4 Cleaning the sensor ..................................................................................................................................... 29
14 Optional accessories................................................................................................................................................ 29
15 Disposal or waste .................................................................................................................................................... 30
16 Appendix A: Headset overview............................................................................................................................... 31
16.1 Description.................................................................................................................................................. 31

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16.2 Headset operations ...................................................................................................................................... 31
16.3 Working as a wireless headset..................................................................................................................... 31
16.4 Working as a wired headset ........................................................................................................................ 31
16.5 Pairing a new headset with the OS 531....................................................................................................... 32
16.6 Care and maintenance ................................................................................................................................. 32

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1 Safety instructions
Please check if this instruction manual matches the product type.
Please observe all notes and instructions indicated in this manual. It contains essential information
which must be observed before and during installation, operation and maintenance. Therefore this
instruction manual must be read carefully by the technician as well as by the responsible user or
qualified personnel.
This instruction manual must be available at the operation site of the leak detector at any time. In case
of any obscurities or questions, regarding this manual or the product, please contact the manufacturer.
WARNING!
Compressed air!
Any contact with quickly escaping air or bursting parts of the compressed air system can lead
to serious injuries or even death!
•Avoid that persons get hit escaping air or bursting parts of the system.
WARNING!
Laser pointer!
Do not point into the eyes with the laser. it can lead to serious injuries particularly on lens and
retina or even blindness!
•Never look directly at the laser
•Never point the laser at persons.
•Never point the laser at smooth and reflective surfaces. This can lead to a reflection of the laser.
WARNING!
Voltage used for supply!
Any contact with energized parts of the product, may lead to a electrical shock which can lead
to serious injuries or even death!
ATTENTION!
Permitted operating parameters!
Observe the permitted operating parameters, any operation exceeding these parameters can
lead to malfunctions and may lead to damage on the instrument.
•Do not exceed the permitted operating parameters.
•Make sure the product is operated in its permitted limitations.
•Do not exceed or undercut the permitted storage and operation temperature and pressure.
General safety instructions
•It is not allowed to use the product in explosive areas.
•Please observe the national regulations before/during operation.
Remarks
•It is not allowed to disassemble the product.
ATTENTION!
Measurement values can be affected by malfunction!
The device must be used properly and frequently maintained, otherwise it may lead to

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wrong measurement values that can lead to wrong results.
•Avoid condensation on the leak detector sensor because this will affect the accuracy enormously.
Storage and transportation
•Ensure the transportation temperature is between -20 ... +50°C.
•For transportation it is recommended to use the packaging that comes with the leak detector.
•Please ensure that the storage temperature of the sensor is between -10 ... +50°C.
•Avoid direct UV and solar radiation during storage.
•For the storage the humidity must be <90%, no condensation.
2 Application
OS 531 is a hand-held ultrasonic leak detector that helps you quickly find and record leakages in compressed air or
any gas systems.
When gases leak through tubes and tanks, an ultrasonic sound is produced. OS 531 can detect the sound from
several-meter away, and transform the inaudible sound into a frequency that can be easily heard by ears.
In unpressurised systems, you can use an ultrasonic tone generator to generate sounds that can be detected by OS
531.
To efficiently manage leak surveys, leaks, and related repair activities, you can purchase the LMS (Leak Management
Software), which is specifically designed for the OS 531. LMS is purchased independent of OS 531, and can be
installed on a local or cloud-based server.
The OS 531 can work in the LMS or Non-LMS mode. This manual takes you through how to use OS 531 in these two
modes.
3 Features
•Finds leaks in the compressed air or gas system easily even from distance
•High resolution 3.5” color touch screen, easing operations in leak detection
•Wireless connection with headset
•Built-in camera to take photo of leak locations
•Voice recorder for voice memos
•Laser pointer to pinpoint leak locations
•Records leak information for statistics and repair
•Calculates air loss in l/min, m3/h or cfm and in the local currency
•Integrated noise reduction technology
•Battery capacity for up to 8 hours
•Wi-Fi interface enables wireless data transmission with the LMS.
4 Technical data
4.1 General data
Principle of measurement
Ultrasonic leak detection

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Measuring medium
Compressed Air, refrigerants and any compressed gases
Plug
3.5 mm stereo phone jack for headset
Operating temperature
0 ... +40°C
Battery life
About 8 hours with wireless off
Charging temperature
+10 ... +45°C
Charging time
Around 3 hours
Materials of the detector
PC + ABS
Dimensions
See section 7.3.
Interface
Wireless connection to headset
USB port for charging and data exchange
Display
3.5” color LCD
Laser pointer
Wave length: 640 ... 660 nm
Output power: < 1.0 mW
WLAN
2.4 GHz band
Camera
5.0 megapixels
Headset
Noise isolated and wireless
Weight
3.65 kg (full set)
4.2 Electrical data
Power supply
Internal lithium-ion battery
4.3 Performance data
The table shows the detection distance of various hole diameters at different pressures in the lab environment and
with the trumpet on.
Pressure / diameter
0.1 mm
0.2 mm
0.5 mm
0.5 bar
0.5 m
1.7 m
7 m
5.0 bar
3.6 m
11.5 m
18 m
5 Scope of delivery
The OS 531 layout in the transportation case is shown as below.

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Please make sure that below components are included in your package.
Qty
Description
1
OS 531 leak detector
1
Noise isolated/canceling wireless headset (page 31)
1
Focus tube and focus tip (used for leak detection)
1
Trumpet (used to increase sensitivity and isolate from environmental noise)
1
Battery charger
1
Type-C USB stick
1
Transport case
1
Leak tags to mark found leaks, 100 pieces
1
Instruction manual
1
Calibration certificate
1
Ultrasonic tone generator
1
Calibration for OS 531
6 Learning about the device
This chapter describes components of the OS 531 main unit.

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6.1 Components
Part
Function
1
Power button: Long press to turn OS 531 on or off. It also works as a shortcut button for taking photos
in leak detection.
2
Voice recording button: Press to record voice memos in leak detection.
3
Laser button: Press to turn laser on or off.
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Sensitivity wheel: Turn the wheel to fine tune the sensitivity level.
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Touch screen: for further functions
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Sensor unit: To detect the ultrasonic sound level.
To increase the sensor sensitivity, mount on the trumpet.
6.2 Touch screen display
The 3.5” touch screen enables you to record and manage leak records as well as configure OS 531 easily.

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Area
Function
1
Leaks button
Click to view and/or delete the leak records.
2
Record button
Click to record a detected leak by recording voice memos and taking photos.
3
Menu button
Click to perform additional actions. For more details, please see the following chapters.
4
Sound Level
Shows the sound intensity in dB. Range: 0 … 99.
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Leakage Grade
Shows the grade of the detected leakage:
•Grade 0: Leakage = 0 l/min
•Grade 1: 0 < Leakage ≤ 1 l/min
•Grade 2: 1 < Leakage ≤ 4 l/min
•Grade 3: 4 < Leakage ≤ 9 l/min
•Grade 4: Leakage > 9 l/min
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Calculated Losses
Shows the detected leakage and the loss amount in cash per year.
Leakage is calculated based on the sound level detected as well as the pressure and distance
settings.
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Pressure / Distance Setting
Shows the latest settings for the pressure in the detected object and the distance between the OS
531 sensor and the leak point.
You can change the settings by touching the numbers on the touch screen.
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Sensitivity Setting
Shows the sensitivity level. You can adjust the setting by turning the sensitivity wheel.
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Indicates the intensity of the sound that the OS 531 detects： Red strongest, yellow the less, and
green the least.
You can see the actual sound level in DB in the Sound Level area.
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Status bar
Shows the OS 531 status, including the following icons or text:
•WLAN: Icon, displayed when the WLAN is connected.
•Survey on: Text, displayed when a survey is in progress.
•Trumpet: Icon, displayed when the trumpet is mounted on and well connected with the
sensor.
•Battery capacity indicator: Shows the battery percentage.

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•LMS: Text, displayed when the OS 531 is in the LMS mode.
•Person: Only applicable to the OS 531 in the LMS mode. Icon, displayed when a
technician is logged into the LMS.
•Laser: Icon, displayed when the laser pointer is turned on.
6.3 Dimension and electrical ports
See the following figure for dimensions of the OS 531 main unit. The unit comes with two electrical connectors：
•USB Type-C port: On the right-hand side of the OS 531 in the front view, used to charge the OS 531 and
transfer data.
•Headset jack, At the bottom of the OS 531 handle, reserved to connect the wireless headset through the
supplied audio cable when the headset runs out of power.
7 Before you start for the first time
Before you use a new OS 531 to detect leaks for the first time, charge the device and perform the initial device setup.
7.1 Charging the device
OS 531 is a battery-powered device and partially charged before delivery. If the battery power is low, charge it via the
USB Type-C port on the right-hand side of the device. Please use the USB cable and one of four charging adapters
supplied in the delivery package to charge.
7.2 Performing initial setup
Steps:

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1. Turn on the OS 531 by pressing the Power button
for a few moments.
The OS 531 starts up. When the process is
completed the home screen shown on the left
appears.
2. Access Menu > Device Settings
3. Click Language and specify the device language.
4. Click Date/Time and specify the date, time, and time zone.
Note: Wrong settings will lead to wrong date and time in a leak record, and in the LMS mode, lead to wrong date
and time in all reports, which cannot be corrected in the LMS.
5. To enable the wireless headset, do the following:
A. Click Pairing Headset and then turn on the Wireless Headset toggle.
B. Power on the headset by pressing and holding the Power button for 3 seconds.
After wireless connection is built, the message “EDIFIER W860NB connected” appears on the OS 531
screen .
Note: The headset is paired with the OS 531 before delivery. The OS 531 can work with only the wireless headset
supplied by Omega air. After you purchase a new headset from Omega air, you must pair it with your OS 531 on
your own. For more information about the headset and its operations, see .
6. To enable the device to play the voice recordings from the wired headset, click Speaker Settings, and then turn
on the <Headset voice recording playback> toggle. To adjust the volume, move the Headset Volume slide.
Note: The device cannot play the voice recordings through the wireless headset.

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7. To enable the device play the voice recordings from the device speaker, click Speaker Settings, and then keep the
<Headset voice recording playback> toggle turned off. To adjust the volume, move the Internal Speaker Volume
slide.
8. To adjust the volume of the leakage sound, click Speaker Settings, and move the Sensor Headset Volume slide.
Note: The leakage sound is converted from the ultrasound of the leak detected, and can be played only through the
headset.
9. To adjust the display brightness, click Display Settings.
10. To adjust the volume of pressing buttons, click Beeper Settings.
Note: By clicking the icon on the top left side, you can return to the home screen.
8 Procedures of conducting a leak survey
A leak detection project is managed by a “survey”. An OS 531 can work in non-LMS mode or LMS mode. The
procedures between these two modes lie in:
•In the non-LMS mode, surveys are created in the OS 531.
•In the LMS mode, surveys are created in the LMS and then downloaded to the OS 531. The leak records
detected by the OS 531 will be uploaded to the LMS for management.
8.1 Using the OS 531 in the non-LMS mode

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Steps:
1.
2.
3.
4. and
5.
6.
8.2 Using the OS 531 in the LMS mode
Steps performed on the OS 531:
1.
2.
3.
4. and
5.

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6. If the leak records in the CSV file is needed,
7.
In the LMS+OS 531 application scenario, there are three user roles who assume different job responsibilities. See the
below table for their description.
Only users in the technician role are allowed to access the OS 531 and use it to detect leaks.
Role
Job responsibilities
Administrator
To administer the LMS, including:
•To set up the LMS and maintain the LMS settings
•To set up and maintain master data
•To create and manage LMS users (including officers and technicians) and service
clients in the LMS
•(When needed) To create and manage leak surveys and part suppliers in the LMS
Officer
To administer technicians and surveys in the LMS:
•To create and manage technicians and service clients
•To create and manage leak surveys and part suppliers
•To maintain master data
Technician
To detect leaks using the OS 531:
•To download the survey from the LMS to the OS 531
•To detect leaks using the OS 531
•To upload the detected leak records to the LMS
To log in the LMS to view the survey status and the processing progress of his/her survey.
For more information about the LMS and how to use the LMS, log into the LMS and see its online help.
9 Setting up and Starting a leak survey
To conduct leak detection, the first step is to set up and start a leak survey. Detailed steps are as follows:
1. (LMS or non-LMS mode).
2. Setting up a leak survey
Depending on whether your company has deployed the LMS server, the way to setting up a leak survey is
different:
•In the non-LMS mode, as a technician, create a survey as needed in the OS 531. For more
information, see .
•In the LMS mode, a survey is created in the LMS, and as a technician you need to download it to the
OS 531. For more information, see .
3.
4.

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9.1 Switching the OS 531 to the required mode
ATTENTION!
Before switching the mode, please perform or . Otherwise, the records detected in the
previous mode will be lost!
1. Access Menu > Device Settings > Enable LMS Mode.
2. To enable the LMS mode, switch on the Enable LMS Mode
toggle. To the non-LMS mode, switch off this toggle.
9.2 (Non-LMS mode only) Creating a survey
When the OS 531 in the non-LMS mode, to conduct a leak survey for a site, you must first create the survey in the OS
531.
Steps:
1. Access Menu > Survey Start.
2. Enter the survey ID and site name.
3. Click Create.
4. In the Confirmation pop-up window that appears, check the
input information, and if correct, click Yes.
Note: Before you have completed checking and specifying the
survey settings, do not start the survey by clicking Start. The
reason is once you start the survey, the currency unit cannot be
changed.
9.3 (LMS mode only) Downloading a survey from the LMS
As a technician, before you start to detect, download the survey information from the LMS.
Note: An OS 531 in the LMS mode allows only users in the technician role to log in for leak detections. For more
information about the user roles and their responsibilities in the LMS + OS 531 application, see section 9.2 .
Steps:
1.
2.
9.3.1 Remotely logging into the LMS via WLAN
First connect the OS 531 to the WLAN network through Wi-Fi, and then log into the LMS through the WLAN for user

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authentication.
Steps:
1. Access Menu > Device Settings > WLAN.
2. In the WLAN screen, switch on the WLAN toggle, and select a
WLAN to join.
Note: After the WLAN link is established, the OS 531 remembers the
password. Next time when you enable WLAN, the OS 531 connects to
this WLAN automatically without asking for the password.
Tips:
•You can make your mobile phone a hotspot for WLAN.
•In some networks, only registered MAC addresses are
permitted to connect to the WLAN. Ask your network
administrator to add the MAC address of your OS 531
(Displayed in the Device Information menu) to the permitted
list.
3. Access Menu > User Login.
4. Enter your email address in the User Name field, and then enter
the password, which is sent to the email address when your account
is created in the LMS.
Note:
Only the user account of the technician role can log into the OS 531.
5. To have the user name shown the next time, click the Save my user name check box.
6. Click the Domain button and enter the the domain name or IP address and port number of the LMS server (for
example, 192.244.11.204:8000). Then click <Back>.
Notes:
•Ask the LMS administrator or your IT technician for the URL of the LMS server.
•To use the domain name and port number to access the LMS server, enter “http://” before the address.
(For example, http://LMS.example.net:8080) .
7. Click the Log in button.
If the user name and password are authenticated by the LMS server, the menu name is changed from User Login
to User Logout.
9.3.2 Downloading the survey information from the LMS
After you successfully log into the LMS from your OS 531, choose the survey that you want to conduct and download
its data to the OS 531. The survey data includes client information, site information, survey information, and master
data.
An OS 531 can work for only one survey at a time. If you download the information of a survey to the OS 531, only
the leak records detected under this survey can be viewed and managed on the OS 531 screen. Leak records of the
previous survey can be accessed only through a PC that is connected to the OS 531 (See section 13.2 for details).
To download a survey to the OS 531:

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1. Access Menu > User Logout > Download Site Information.
All in-progress or new surveys that are assigned to you are shown on the screen.
2. Click the survey that you want to download, and check the survey name, site name, location, and building
information.
Tip: To view more detailed information, click the inverted triangle sign after the survey ID.
3. Click Download.
Attention! The download action will have all leak records in the current survey deleted. If needed, upload
them to LMS before download.
4. In the Confirmation window that appears, click Yes to start the download.
When the download is completed, the Complete button appears.
5. Click Complete to return to the User Logout window.
Tip: To save the battery, disable WLAN after the download is completed.
9.4 Specifying the survey settings
After you create or download a survey to the OS 531, specify the site-specific survey settings, such as media,
pressure, distance, and units of flow, pressure and currency.
1. Access Menu > Survey Settings.
2. Click Media Setting, and configure the gas media to be
detected.
Note: In the non-LMS mode, the options of the Media Settings
are fixed. In the LMS mode, its options are downloaded from the
LMS, and can be edited in the LMS.
3. Click Pressure setting, and configure the pressure of the to-be-detected media.
4. If the OS 531 is in the non-LMS mode, perform the following settings:
a. Click Flow Unit Setting, and select from m3/h, l/min and cfm (default: l/min).
b. Click Pressure Unit Setting, and select from bar, psi, MPa (default: bar).
c. Click Cost Setting, and configure cost related settings, such as the operating hours per year (default:
6400), currency unit in the alphabetical code stipulated in ISO 4217 (for example, USD for the US currency
and CNY for the Chinese currency. Default: USD), and cost per cubic meter (default: 0.02).
Note: In the non-LMS mode, after the survey is started, you can change the units of flow and pressure, but cannot
change the currency unit.
5. If the OS 531 is in the LMS mode, click Record Option Settings, and switch on or off the toggles as needed to

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have the corresponding setting items shown or hidden in the leak recording process.
Note: In the LMS mode, the flow and pressure units and cost-related settings are configured by an officer in the
LMS. When you download a survey to the OS 531, these settings are downloaded to the OS 531 along with other
survey data. If you spot a wrong setting, report it to your officer. After the officer updates the setting in the LMS,
the leak records that you have uploaded or will upload to the LMS will be updated and saved to the LMS database
based on the new setting.
9.5 Starting the survey
After you create or download a survey and specify the survey settings, now you can start the survey to enable the
leak detecting and recording functions on the OS 531.
Steps:
1. Access Menu > Survey Start.
2. On the Survey Start screen that appears, click Start.
3. In the Confirmation pop-up window, check the survey
information. If correct, click Yes to confirm.
Now the Record button on the home screen is enabled and the
“Survey On” status is shown on the left top of the screen.
9.6 Stopping the survey
To have the OS 531 save the detected leak records into a CSV file, you must stop the survey.
1. Access Menu > Survey Stop.
2. Click Stop.
The Record button is disabled on the screen.
10 Detecting leaks
After you start a survey, now you can use the OS 531 to detect and record leaks for the survey.
The following steps describe a recommended procedure of detecting a leak.

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1. After a survey is started, the home screen shown
as the left-hand side appears on the touchscreen.
Notes:
•The laser pointer is turned off by default.
•You can adjust the sensitivity by turning the
sensitivity wheel on the OS 531 handle.
2. To turn on the laser, press the Laser push button as
shown on the left-hand side.
Note: To avoid laser injury, the the laser function is
enabled only when the home screen is displayed. If
you enter other screens, the laser function is
disabled.
3. Point at a suspected leak with the laser. The
leakage grade and leak amount are shown on the
touch screen.