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TSI Instruments PORTACOUNT 8020, Дополнение

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P

ORTA

C

OUNT

®

 Plus Model 8020 Technical Addendum

revised 7-27-2001

TSI Incorporated, St. Paul, Minnesota, USA

24

Copyright © 2001 all rights reserved

The N95-Companion is used as a particle conditioner in between the respirator and the
PortaCount.  The 0.04 micrometer particles that are allowed to pass through to the
PortaCount are in the size range that is effectively stopped by low efficiency filter media
as well as high efficiency media.  By only allowing the PortaCount to "see" particles that
can only enter the respirator via a face seal leak, the N95-Companion makes low
efficiency media look like high efficiency media to the PortaCount.  Since both the
ambient and respirator sample pass through the N95-Companion, the ratio of outside
concentration vs. inside concentration (fit factor) is valid.

For more information visit the 

www.tsi.com

 and review the following documents:

Mechanisms of Filtration for High Efficiency Fibrous Filters

 (Application Note ITI-041)

PortaCount Theory of Operation

 (Application Note ITI-048)

N95-Companion Model 8095 Theory of Operation

 (Application Note ITI-053)

Penetration of Ambient Aerosols Through Respirator Faceseal Leaks

 (Application Note ITI-055)

Fit Testing Using Size-Selected Aerosol

 (Application Note ITI-062)

PortaCount Internal Program Configuration

When the PortaCount Plus senses the presence of the N95-Companion it automatically
resets itself and runs with special configuration parameters designed to function with the
N95-Companion.  The changes include:

•

 

Sample timing changes to accommodate the longer N95-Companion sampling
requirements.

Ambient purge = 6 seconds
Ambient sample = 15 sec
Mask purge = 15 sec
Mask sample 50 sec,

•

 

The maximum fit factor that can be displayed is 200.  Any fit factor measured to be
above 200 is displayed as 200 with the words "Fit Factor" flashing.  The 200 limit
was necessary because the particle concentrations output by the N95-Companion are
too low to allow accurate fit factor measurements at higher levels.

•

 

The pump inside the N95-Companion runs in addition to the pump inside the
PortaCount.

Содержание PORTACOUNT 8020

Страница 1: ...del 8020 Technical Addendum revised 7 27 2001 TSI Incorporated St Paul Minnesota USA 1 Copyright 2001 all rights reserved www tsi com PORTACOUNT Plus Model 8020 Technical Addendum includes the N95 Com...

Страница 2: ...espirator fit testing Persons who will find this document of interest include respirator manufacturers respiratory protection researchers and persons conducting general ultrafine particle studies not...

Страница 3: ...p and bottom halves of the enclosure Follow the instructions below 1 Turn the PORTACOUNT Plus off 2 Turn the PORTACOUNT Plus over so that it is face down and locate the four screws on the bottom that...

Страница 4: ...Setting 1 ON 2 OFF 3 ON 4 ON 5 ON 6 ON 7 ON 8 ON The function of each of the DIP Switches is as follows Factory settings are shown in BOLD type DIP Switches 1 2 and 3 Baud Rate Switches 1 2 and 3 con...

Страница 5: ...actory Settings on Power Up Switch 6 should always be left ON unless you want to reset all the internal settings back to the way they were when the PORTACOUNT Plus was new When switch 6 is OFF the POR...

Страница 6: ...esota USA 6 Copyright 2001 all rights reserved peripheral device When switch 8 is OFF the CTS signal will be required The CTS signal is always required when the PORTACOUNT Plus is in External Control...

Страница 7: ...cc FF 3 505 PASS Fit factor exercise 3 Mask 4 10 cc Ambient 5100 cc FF 4 1231 PASS Fit factor exercise 4 Mask 7 90 cc Ambient 4900 cc FF 5 610 PASS Fit factor exercise 5 Mask 13 50 cc Ambient 4800 cc...

Страница 8: ...n that shows the internal memory settings The settings reflect how the PORTACOUNT Plus memory is set at the moment and can be changed For example when all settings are at the factory settings the data...

Страница 9: ...tches are considered ON if set to 1 and OFF if set to 0 DIP Switches are numbered 1 8 from left to right on the printout and 1 8 from top to bottom on the circuit board Output When a Battery Runs Low...

Страница 10: ...dular connector Contact 1 is on the left when viewed as shown Data Port Pin Assignments Contact Number Function Direction 1 Not used 2 Ready DTR From PORTACOUNT Plus 3 Receive data Rx To PORTACOUNT Pl...

Страница 11: ...of these cables are always female Serial interface connectors on the back of the computer are always male Pin 1 on the PORTACOUNT plus Data Port is on the left as you look at the Data Port connector T...

Страница 12: ...COUNT Plus will be terminated with both an ASCII carriage return cr and a line feed lf character When the PORTACOUNT Plus receives a command that is not understood or has values that are outside the a...

Страница 13: ...haracters sent are ignored until the first J cr is received Response from PORTACOUNT Plus OK cr lf When External Control Mode is invoked certain parameters are automatically set as follows The interna...

Страница 14: ...when External Control Mode is first invoked Response from PORTACOUNT Plus VO cr lf ZD cr Disable Continuous Data Transmission This command tells the PORTACOUNT Plus to stop sending continuous particle...

Страница 15: ...tery Bad Pulse Good RBB cr lf Battery Bad Pulse Bad S cr Request Settings This command forces the PORTACOUNT Plus to transmit all current settings for sample times fit factor pass level serial number...

Страница 16: ...vvv is the fit factor pass level contained in that memory location The maximum value allowed for the fit factor pass level is 64000 There is one space after the SP Serial Number The PORTACOUNT Plus se...

Страница 17: ...to set the mask sample time for exercise 4 to 40 seconds send the command PTM0440 cr The PORTACOUNT Plus will respond with an echo of the same command PTM0440 cr lf PTA00vv cr Set Ambient Sample Time...

Страница 18: ...t Factor Pass Level The PORTACOUNT Plus stores a set of 12 fit factor pass levels in memory The operator is allowed to scroll through and select one of these values as the current fit factor pass leve...

Страница 19: ...ACOUNT Plus This command clears the Display and then displays a fit factor pass level The FIT FACTOR PASS LEVEL message is turned ON xxxxxx is the fit factor pass level to display and can be in the ra...

Страница 20: ...echoing A000740 0 cr lf Nxx cr Display Exercise Number on PORTACOUNT Plus This command displays an exercise number on the PORTACOUNT Plus Display xx is the number to display and must be in the range f...

Страница 21: ...Turn SERVICE message OFF Bit 5 LOW PARTICLE Message 1 Turn LOW PARTICLE message ON 0 Turn LOW PARTICLE message OFF Bit 6 LOW BATTERY Message 1 Turn LOW BATTERY message ON 0 Turn LOW BATTERY message OF...

Страница 22: ...000001 cr The PORTACOUNT Plus responds I00000001 cr lf To turn the FIT FACTOR message and the PASS message ON at the same time bit 3 must be a 1 and bit 8 must be a 1 send I00100001 cr The PORTACOUNT...

Страница 23: ...com to obtain a copy To operate with the N95 Companion the PortaCount Plus must have the revision A modifications The tag on the bottom of the PortaCount Plus will show MODEL 8020A if it is N95 Compan...

Страница 24: ...ers Application Note ITI 041 PortaCount Theory of Operation Application Note ITI 048 N95 Companion Model 8095 Theory of Operation Application Note ITI 053 Penetration of Ambient Aerosols Through Respi...

Страница 25: ...rights reserved The valve inside the PortaCount is no longer used and is left un energized sample tube open The valve control is automatically re routed to the N 95 Companion valve located inside the...

Страница 26: ...ced by a factor of 10 Pass Fail setting for PortaCount alone Pass Fail setting with N95 Companion Comment 0 0 Pass Fail indicator OFF 1 to 10 1 Minimum pass fail 1 50 5 100 10 200 20 500 50 1000 100 2...

Страница 27: ...to ground to signal PortaCount that N95 Companion is attached 4 5 VDC Solenoid valve voltage feed from PortaCount High current voltage supply for solenoid valve in pendant 5 Solenoid valve control fro...

Страница 28: ...PORTACOUNT Plus Model 8020 Technical Addendum revised 7 27 2001 TSI Incorporated St Paul Minnesota USA 28 Copyright 2001 all rights reserved...

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