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11

Chapter 2

| How the QuantiFit2 Works | Fit Factor Explanation

2

How the QuantiFit2 Works

The measured leak rate (MLR) is directly related to respirator fit and integrity. All fit factors are
calculated from the MLR. The leak rate is specified in cc/min.

The overall fit factor is calculated by using the harmonic mean of the fit testing steps as follows:

Where:
N = The number of exercises;
FF1 = The fit factor for the first exercise; and
FF2 = The fit factor for the second exercise; and
FFN = The fit factor for the nth exercise

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Содержание Quantifit2

Страница 1: ......

Страница 2: ...2 ...

Страница 3: ...trument Front Connections 14 Instrument Back Connections 15 Connecting Tubes 16 Battery 16 Daily Verification 18 CHAPTER 4 Startup Wizard 19 Navigation 20 CHAPTER 5 People 23 CHAPTER 6 Performing A Test 26 CHAPTER 7 Reports 28 CHAPTER 8 Daily Verification 30 CHAPTER 9 Settings 31 System Settings 31 System Info 32 Setup Respirators 32 Admin Menu 33 Setup Operators 33 Add Parameter 33 Change Regulat...

Страница 4: ...PTER 15 People 45 CHAPTER 16 Company 46 CHAPTER 17 Tests 47 CHAPTER 18 Settings 49 Security 49 Options 50 Respirators 51 Respirator List 51 Respirator Sizes 52 Parameters 52 Update 52 About 52 CHAPTER 19 Reports 53 CHAPTER 20 Troubleshooting 54 Graph Behavior 54 Failing Fit Factors 57 Trouble Passing Fit Test 58 Verification Check Errors 59 CHAPTER 21 Service 61 Calibration and Maintenance 61 CHAP...

Страница 5: ...HAPTER 23 Appendix A Specifications 66 CHAPTER 24 Appendix B Import Personnel Template 67 CHAPTER 25 Appendix C Terminology 68 CHAPTER 26 Appendix D CNP Diagram 70 CHAPTER 27 Appendix E Regulations 71 CHAPTER 28 Appendix F Fit Test Adapters 73 ...

Страница 6: ...6 ...

Страница 7: ...y other commercial damage caused or alleged to have been caused directly or indirectly by this document For further information please contact the manufacturer OHD LLLP 2687 John Hawkins Pkwy Hoover AL 35244 U S A 1 205 980 0180 www ohdglobal com sales ohdglobal com techsupport ohdglobal com VERSION 1 52 12 15 2020 Welcome The QuantiFit2 can be used with or without OHD Logic software When testing ...

Страница 8: ...akes the safety and health of our customers very seriously With this in mind we believe it is important to address concerns about possible cross contamination during fit testing The risk of cross contamination resulting from the use of a QuantiFit2 is very minimal Fit Testing itself does not increase or decrease a person s risk of exposure to any virus or illness The real threat is coming into clo...

Страница 9: ...iently inactivate over 99 of microorganisms to include COVID 19 within a minute The adapter should be dry before use in a fit test The QuantiFit2 tubing should be carefully wiped down with an EPA approved disinfectant If there is a threat of contamination the fit test operator should take precaution when carrying out fit testing according to the guidance provided by the CDC If masks are shared for...

Страница 10: ...til the challenge pressure returns to the targeted value This process continues for 8 seconds and then the test step ends During the fit test the QuantiFit2 measures exactly how much air the instrument removed from the respirator after reaching the challenge pressure This measurement is equivalent to the leak rate Challenge pressure expressed in inches of H20 is the maximum partial vacuum created ...

Страница 11: ...d integrity All fit factors are calculated from the MLR The leak rate is specified in cc min The overall fit factor is calculated by using the harmonic mean of the fit testing steps as follows Where N The number of exercises FF1 The fit factor for the first exercise and FF2 The fit factor for the second exercise and FFN The fit factor for the nth exercise ...

Страница 12: ...pters to interface with the QuantiFit2 required for fit testing o Rechargeable battery pack o External battery charger o Printer standard printer and or card printer o USB Keyboard o Trigger button The QuantiFit2 Carrying Case A Power cord B Batteries optional C Adapters optional D Power Supply E USB Cable F Tube Assembly G Additional Storage Unpacking The QuantiFit2 case can contain all of the ne...

Страница 13: ... a place for several adapter packages Spare batteries Cords cables and tubes o Carefully lift out the QuantiFit2 by holding the handle and the bottom of the instrument Place the instrument on a solid level surface with ample surface room Connect the power supply into the back of the instrument and the power cord to a wall outlet unless using a battery that has been properly charged Turn on the ins...

Страница 14: ... Connections A Carrying Handle B Color Touch Screen C Clear Tube Connection D Gray Tube Connection E Blue Tube Connection F Verification Connection for Gray Tube G Verification Connection for Clear Tube H Verification Connection for Blue Tube I Verification Connections J Instrument Exhaust Port ...

Страница 15: ...urpose The USB symbol on the cable must face up to properly insert this cable This cable allows for the QuantiFit2 to be operated from the supplied software F Serial Number Located in the center the serial number is important should you require service or support All records are kept according to the serial number G Battery Latch Push down on this latch to release the battery pack and pull outward...

Страница 16: ...fixtures while holding onto the tube and not the fixture The metal fixture will click into place o The blue tube will always connect to the single port connection o The gray and transparent tubes will be connected to the port connectors that are side by side The two connections are interchangeable on the adapter and can be placed on either port Battery o The optional battery pack will allow the op...

Страница 17: ...eries is below freezing 32 F 0 C during charging Charging in temperatures below freezing can lead to permanent metallic lithium buildup i e plating on the anode increasing the risk for failure Heat released during cell failure can damage nearby cells releasing more heat in a chain reaction known as a thermal runaway The high energy density in lithium batteries makes them more susceptible to these ...

Страница 18: ...testing The purpose is to confirm that the instrument is working properly The daily verification test measures the leak rate of the leak orifice on the triple tube assembly at various pressure levels and confirms that the diaphragm pump and other processes are working correctly See the 8 Daily Verification section for more information 30 ...

Страница 19: ... synchronize or merge with another database A decision should be made as to whether this data function will be necessary now or in the future so that the synchronizing feature will perform as expected Regulation o The operator will be required to select the regulation that will be followed for testing in any specific region This can be changed in the Settings screen if there is a need to switch re...

Страница 20: ... section of this manual for more information People Test o After the instrument check has been performed the wizard will move on to the People screen o People can be added one by one imported from a list or added at the time of a test CAUTION If the QuantiFit2 data is to be synchronized or merged with the database in Logic software the list of names must first be transferred into the QuantiFit2 fr...

Страница 21: ...viewed e g person respirator etc OPERATORS Add edit operators that will be assigned to testing individuals ADMIN MENU Entry to a menu for secure and important settings PARAMETERS Settings for customizing mask criteria CANCEL This button will close the current screen Any values entered by the operator on the screen will not be saved PEOPLE TEST Add edit people and initiate fit test CAUTION This sig...

Страница 22: ...operator to return to the previous screen SETTINGS Enters the screen with options for changing settings on the QuantiFit2 GO DOWN To move down through a list SETUP RESPIRATORS Add edit or delete respirators GO FORWARD This button will guide the operator to the next screen in the sequence SYSTEM INFORMATION with information including software version serial number calibration due date etc GO UP Thi...

Страница 23: ...typing in an E only those names starting with E and within the company selection will be shown B Company o Company is intended to create a division among the test subjects who are entered into the on board database o To add a company to the QuantiFit2 database type in a company name when adding a test subject to the database A The company will be saved automatically along with the test record B CA...

Страница 24: ...oftware o See 24 Appendix B Import Personnel Template for import template requirements F History o When a test subject is selected and the history button is pressed a screen will show any existing tests for this person o Tests will be listed by date G Edit o When selecting a test subject and pressing on the edit button there will be an opportunity to change the saved information for this particula...

Страница 25: ...es Respirator Size Operator and if the respirator used for testing is a surrogate respirator or the respirator actually assigned to the test subject required only for the HSE regulation o The Respirator selection will only show the respirators that have been selected during the setup wizard or in the 9 3 Setup Respirators module on the settings screen 32 ...

Страница 26: ...d clear tubes go to the two ports that are located side by side It does not matter which tube is connected to which of these two connectors See Appendix F for more information Performing the fit test After selecting or adding a person to the database the test can begin o Explain the test to the test subject This test consists of five steps that will measure any leak into the respirator 16 steps fo...

Страница 27: ...equired the instrument will advance to the next step If the test should fail for reasons other than a poor fit test subject coughs or laughs the test starts when the test subject was not ready the tubes were not connected etc the step may be retried o If the signature feature is enabled the test subject will sign on the screen with a finger or an optional stylus o At the end of the test the result...

Страница 28: ...it test reports can be selected by A company An individual person Tests that fall within a specific date range o Summary Fit Test Report A report that will print the specified group of people in a truncated fashion which allows for many people to be recorded on the same sheet Fit test reports can be selected by Company An individual person Tests that fall within a specific date range o Daily Verif...

Страница 29: ...29 Chapter 7 Reports 7 Reports Printed directly to an approved printer ...

Страница 30: ...ms that the diaphragm pump and other processes are working correctly The daily verification may be performed at other times for other purposes A Daily Verification button can be found on the QuantiFit2 Home Screen o Run a daily verification when the instrument moves to another location especially with any environmental changes o Run a daily verification whenever the triple tube assembly is changed...

Страница 31: ...settings are 0 to 10 where 10 is the loudest Brightness allows the operator to increase or decrease the brightness of the display The settings are 1 to 10 where 10 is the brightest Auto Print is turned on when the operator desires the test automatically to be printed upon completion of a fit test Number of Prints allows the operator to select the number of prints when printing reports To be used w...

Страница 32: ...ment has run o Calibration Due Date The date due for annual calibration requirements o Current Date Can be changed by touching the current value o Current Time Can be changed by touching the current value Setup Respirators The QuantiFit2 is populated with an extensive list of respirators When selecting respirators only those turned on will be available as a selection on the Test Information screen...

Страница 33: ...tests o If security is turned on the operators entered into the database either will be an Administrator or Operator o The Operator will have limited access to the system as determined by an Administrator o To record an Operator there are key fields required First and Last Name Email Pin Admin or not An Administrator can access any part of the QuantiFit2 The Operator is limited to specific areas t...

Страница 34: ...ned so that when a regulation is selected all tests are automatically executed with the correct settings New regulations will be added in future updates as they become available or are modified For a more detailed explanation and description of the regulations please see Appendix E The current regulations include o OSHA Occupational Safety and Health Administration US o CSA Canadian Standards Asso...

Страница 35: ...ny of the information listed above Reset to Factory Settings will remove all data on the Quantifit2 and it will operate as though it is the very first time the unit is powered up Update Software o Occasionally there will be updates to the on board software o OHD will notify customers when an update is available if the unit has been registered o The notification will come via email o The update can...

Страница 36: ...ms there are many ways to do the same task and different operators may feel more comfortable doing things one way as opposed to other ways These instructions will cover the different ways to do each item or task If there are uncertainties about any particular part of the software check the corresponding section in this manual or in the software Most tasks are performed quite easily but there is mu...

Страница 37: ...stallation must be completed by someone logged onto the PC who has administrative privileges The installation file will install all prerequisite files including Windows requirements 1 You may have to approve the installation of this file as it might be one that Windows doesn t recognize or if you downloaded it from our website 2 Accept the license agreement can be found in Appendix G 3 Follow the ...

Страница 38: ...ttings b If security is not turned on anyone will have access and be able to make changes to the software c There are two roles the Admin and the Operator The Operator is able to perform fit tests but the Admin will be able to make changes to the software 6 Add Company a A company is used to separate groups of people b There might be only one company needed or dozens of companies can be used 7 Add...

Страница 39: ...39 Chapter 12 Wizard 12 Wizard ...

Страница 40: ...ned on whenever the Update menu is selected the software will check to see if an update is available and there will be an option to update or not Software updates will typically install on top of the current installation and an uninstall will not be required However if an uninstall is required for any reason this will not affect the database It is best practice with any software to back up data wh...

Страница 41: ... by clicking on the no view icon When doing this the module will become a button that goes to the right most edge of the viewing screen These modules will still be in operation but they won t clutter the screen if they are not used regularly The top bar of the software displays the name of the section Home Screen the selected company and the operator that is currently logged in when the security f...

Страница 42: ...ing is to be performed The company can also be selected in the title bar of the Home Screen o Subject Put the computer cursor in this field and begin to type a person s name first name last name There is a lookup that matches names letters are entered When the correct person appears in the field move on to the respirator selection A person may also be found by using the field s drop down arrow and...

Страница 43: ... instrument registered this field will remember the last one used Add Person There are various ways to enter people into the software for testing For larger groups of people it might be most effective to import a list of people through the Import Export feature in the Settings Data section Another way is through the People section But people may also be entered in this module on the Home Screen o ...

Страница 44: ...r Tested box is left unchecked In addition to those due for testing the list will also contain those people in the database who have never been tested The people who have never been tested can be hidden from view when checking this option Previous Tests This module will contain a list of tests listed in the order in which they were performed and recorded Test Statistics Test Statistics will show a...

Страница 45: ...ivate a person click on Show Inactive select the person and click on the Toggle Active button People can be added or edited on this screen The plus sign will bring up an Add People screen while the edit button will allow the currently selected person s record to be edited The search field can contain any combination of letters that appear in someone s name and that person will show up in the list ...

Страница 46: ... a mobile tester has 200 clients he can divide the people lists between those 200 companies If a company wants to divide people into groups according to which location or building a person works in A shared instrument can have a company for each entity that is using the instrument A person can be transferred to any existing company Add Company Screen o The required field is the company name the re...

Страница 47: ...r who is controlling multiple instruments The QuantiFit2 allows users to run countless machines simultaneously through the OHD Logic software as many machines as an operator is capable of overseeing with flexibility on the start time for any test This screen also contains a Test Creator to begin new tests while viewing current tests ...

Страница 48: ...e day the QuantiFit2 will prompt the user to perform this check When the test is initiated the test subject will see Please review this information If correct press the blue arrow to continue Name size respirator parameter surrogate Test subject will then follow on screen instructions to complete the test o If a test step should fail for any reason The operator will be notified on the software tes...

Страница 49: ...n the Administrator can then add other Operators and or Administrators o Administrator vs Operator When Security is activated to gain access to the software a person will need login credentials These credentials either will be assigned to Operator or Administrator status Operator status allows a person to log into OHD Logic and run tests reports add people and all of the regular functions of a fit...

Страница 50: ...on o Allow Auto Updates will cause the software to check for updates each time the software is opened o Login Timeout is defaulted to Off By selecting a time increment this will determine how long the software can remain untouched before it automatically logs the Operator or Administrator out o Date Format allows the Administrator to select the type of date format preferred MM DD YYYY DD MM YYYY Y...

Страница 51: ...spirator is not listed techsupport ohdglobal com so that we may update our list which will be distributed to our customers as updates are completed o Find the respirator manufacturer and model that will be used for testing and turn that selection on with the toggle switch o When a respirator is turned on it will become part of the selectable respirator list when performing a fit test o When respir...

Страница 52: ...nimum passing fit factor challenge pressure etc An Administrator can create or duplicate an existing regulation and make the required changes This is highly discouraged as the regulations are in place as required Regulations will be added or modified to the software when changes or updates become available The new regulations will be distributed in an updated version of the software Update When cl...

Страница 53: ...t out of all people in the database or in a selected company o Fit Test Card This report will print to a card printer so that people may carry a record of their fit test o Due for Test A list of people who are due to be tested according to the criteria that the operator puts in place o Daily Verification Summary A report for the current day s verification or a date range of daily verifications Whe...

Страница 54: ...serting an object to prop it open 4 For some respirators it might actually be easier to remove the inhalation valves before the test and then replace them at the end of the fit test OSHA 1910 134 Appendix A 6 a 4 The respirator filter or cartridge needs to be replaced with the CNP test manifold The inhalation valve downstream from the manifold either needs to be temporarily removed or propped open...

Страница 55: ...ace characteristics or other objects inhibit a good face to facepiece seal 4 Try a different respirator Many respirators seem to fit well but are not properly sized to a specific wearer In other cases a different size or style may be better suited for the individual wearer Perfect graph but still fails When the graph looks like a perfect fit test but the fit factor is too low to pass this means th...

Страница 56: ...eline 2 Air inhalation or exhalation even slightly creates dramatic changes within the respirator Re instruct the test subject to maintain breath holding during the test measurement 3 A test subject may be unable to stop the flow of air through the nose while holding his or her breath A nose clip can assist the subject be sure that the nose clip does not interfere with the fit of the respirator 4 ...

Страница 57: ...When the leak rate is large the graph can still look somewhat normal The QuantiFit2 will often be able to keep up with the leak and give a good test result regardless of the fact that the leak is too large to yield a passing fit factor 1 As in other leakage situations see HIGH LEAKAGE check all tube connections adapters and adapter connections to respirators 2 Check for proper tension of respirato...

Страница 58: ...Fit2 is not able to complete the Daily Verification Check service will be needed Please contact OHD customer service 2 Respirator Fit Fault a The Operator must first determine that there is a proper fit Any facial hair hair getting anywhere under the respirator seal temple hair too far forward sunken temples or facial scarring protrusions or blemishes having the respirator too loose or too tight a...

Страница 59: ...adapter and tube connection completely under water Then press and hold the SEAL CHECK button for at least 5 seconds Repeat this several times If bubbles are seen coming from the adapter there is a leak in the diaphragm or in the eight screws holding the top plate on Replace the diaphragm and tighten screws firmly Conduct the test again to ensure no bubbles are seen e Check all screws and connector...

Страница 60: ...60 Chapter 20 Troubleshooting Verification Check Errors 20 Troubleshooting o Remove and replace all tubes o Contact OHD to evaluate problem or to arrange return for factory calibration ...

Страница 61: ...e precision instrument that uses electronic pressure sensors to detect minute changes to very low levels of negative pressure to an accuracy of 0 25 To ensure the instrument operates at the parameters for which it is designed OHD requires the QuantiFit2 to receive annual maintenance and calibration at an authorized service facility o Reasons for Annual Maintenance Calibration OSHA Mandate 29 CFR 1...

Страница 62: ...dure are pressure engine checks The pressure engine is completely disassembled cleaned and lubricated where warranted Upgrades The calibration process includes upgrades to the latest firmware versions and modifications as needed Confidence Our NIST National Institute of Standards and Technology traceable calibration assures that the unit is operating properly within accepted parameters ...

Страница 63: ...defects in materials and workmanship for two full years from the date of original purchase During the warranty period we will repair or at our option replace at no charge a product that proves to be defective provided you return the product shipping prepaid to OHD This warranty does not apply if the product has been damaged by accident or misuse or as the result of service or modification by other...

Страница 64: ...rized equipment modifications Copyright OHD agrees to a limited copyright release that allows you to reproduce manuals and other printed materials for use in service training programs and other technical publications If you would like other reproductions or distributions submit a written request to OHD Unpacking and Inspection Follow standard receiving practices upon receipt of the instrument Chec...

Страница 65: ...oftware and all accompanying written materials and retain no copies and the recipient agrees to the terms of this License Agreement LIMITED WARRANTY OHD warrants that the Software will perform substantially in accordance with the accompanying written materials for a period of ninety 90 days from the date of receipt Any implied warranties on the Software are limited to ninety 90 days NO OTHER WARRA...

Страница 66: ... in H2O Temperature Compensation 5 45C Pressure Sensor Pump Pressure Range 0 20 PSI Resolution 0 1 PSI Accuracy 2 5 FS Over Pressure Limit 60 PSI Temperature Compensation 5 45C Instrument Accuracy Challenge Pressure 5 Leak Rate Measurement 3 or 3 cc min whichever is greater Display 800 x 480 pixels Touchscreen Capacitive Touch Environmental Pollution Degree 2 Altitude 2 000 M 6 500 ft USB Interfac...

Страница 67: ... Template To import a list of names directly into the QuantiFit2 an Excel spreadsheet must be filled out with specific headers see below Fields can be empty and will be empty on the unit When importing data from the OHD Logic Software the data will be formatted perfectly for import ...

Страница 68: ...od of Quantitative fit testing QNFT that pulls and maintains a negative pressure inside a respirator by removing and directly measuring any air that leaks into the facepiece Escape only respirator a respirator intended to be used only for emergency exit Filter or air purifying element a component used in respirators to remove solid or liquid aerosols from the inspired air Filtering facepiece dust ...

Страница 69: ... outside the respirator Powered air purifying respirator PAPR an air purifying respirator that uses a blower to force the ambient air through air purifying elements to the inlet covering Pressure demand respirator a positive pressure atmosphere supplying respirator that admits breathing air to the facepiece when the positive pressure is reduced inside the facepiece by inhalation Qualitative fit te...

Страница 70: ...70 Chapter 26 Appendix D CNP Diagram 26 Appendix D CNP Diagram ...

Страница 71: ...100 vi Full Face 500 vii MIL 500 viii SCBA 500 CSA Canadian Standards Association o 5 Step Protocol vi Face Forward vii Bend Over viii Shake Head ix Redon 1 x Redon 2 o Challenge Pressure Modeled Breathing Rate Half Face 0 58 53 8 Full Face 0 58 53 8 SCBA 1 5 93 1 o Minimum Passing Fit Factors Half Face 100 Full Face 500 SCBA 2000 UK HSE Health and Safety o 16 Step Protocol i Normal Breathing Exer...

Страница 72: ...lenge Pressure Modeled Breathing Rate Half Face 0 58 53 8 Full Face 0 58 53 8 SCBA 1 5 93 1 o Minimum Passing Fit Factors Half Face 100 Full Face 500 SCBA 2000 ISO International Standards Association o 5 Step Protocol i Face Forward ii Bend Over iii Shake Head iv Redon 1 v Redon 2 o Challenge Pressure Modeled Breathing Rate Half Face 0 58 53 8 Full Face 0 58 53 8 SCBA 1 5 93 1 o Minimum Passing Fi...

Страница 73: ...OHD testing adapters must be maintained with great care Any dents or cracks that can occur will lose the ability to keep an air tight seal which would make it inadequate for testing Adapters can come in a one piece or two piece arrangement called kits The two piece kit is for the bayonet connection or connections on either side of the respirator These are used mostly for air purifying respirators ...

Страница 74: ... with the single hose connection Submerge the adapter and hose connection completely under water Then press and hold the SEAL CHECK button for at least 5 seconds Repeat this several times If bubbles are seen coming from the adapter there is a leak in the diaphragm or in the eight screws holding the top plate on Replace the diaphragm and tighten screws firmly Conduct the test again to ensure no bub...

Страница 75: ...ination 8 CSA 71 Current Date 32 Current Time 32 Cycle Count 32 D Daily Verification 18 30 Daily Verification Reports 28 Dark Mode 50 Date Format 50 Delete 23 Download 23 F Filtering Facepiece 68 Fit Factor 10 68 Fit Factors 57 Fit Test Report 28 G Graph 54 H HEPA 68 History 23 I Import 67 Inhalation Valve 26 54 Instructing the test subject 26 ISO 71 L Language 19 Large Leak 54 Leak Rate 10 Light ...

Страница 76: ... S SCBA 68 Search 23 Search Field 45 Security 49 signature 26 Signature Capture 31 Software Version 52 Specifications 66 Startup Wizard 19 System Reset 34 System Version 32 T Terminology 68 Terms Conditions 63 Test Creator 42 Test Screen 23 Traceline 54 Troubleshooting 34 54 Tubes 16 U UK HSE 71 Update 52 Update Software 35 Updates 40 Upload 23 USB 15 V Verification Check 19 W WARNING 7 Warranty 6...

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