Archives 2003
Issue No. 80
Issue No. 81
Issue No. 82
Issue No. 83
Issue No. 84
Issue No. 85
Issue No. 86
Issue No. 87
Issue No. 88
Issue No. 89
Issue No. 90
Issue No. 91
Issue No. 92
Issue No. 93
Issue No. 94
Issue No. 95
Issue No. 96
Issue No. 97
Issue No. 98
Issue No. 99
Issue No. 100
Issue No. 101
Issue No. 102
Issue No. 103
Issue No. 104
Issue No. 105
Issue No. 106
Issue No. 107
Issue No. 108
Issue No. 109
Issue No. 110
Issue No. 111
Issue No. 112
Issue No. 113
Issue No. 114
Issue No. 115
Issue No. 116
Issue No. 117
Issue No. 118
Issue No. 119
Issue No. 120
Issue No. 121
Issue No. 122
Issue No. 123
Issue No. 124
Issue No. 125
Issue No. 126
Issue No. 127
Issue No. 128
Issue No. 129
Issue No. 130
Issue No. 131

  Log In

 

April 13, 2003

                             ET NEWS
================================================================
        NEWS AND INFORMATION FOR ENGINEERING TECHNICIANS
----------------------------------------------------------------
Issue No. 94           http://www.etnews.org           4-13-2003
================================================================

Contents
--------
- News
- ET Journal
- NICET Test Dates
- AFAA Class Schedule
- Comments & Acknowledgements

================================================================
NEWS
================================================================

Fire Alarm Systems Program Change
Based on recommendations from NICET’s Fire Alarm Committee, Work
Element 37001, Automatic Fire Detector Spacing, pertaining to
outdated industry practices, is deactivated and unavailable for
testing, effective immediately. As a result of this change, the
examination requirement for Level IV General Work Elements has
been reduced to five (see revised examination requirements chart
in the Fire Alarm Systems Program Detail Manual). Technicians who
have passed this work element will still retain credit for it,
and those requesting it on a future exam may request a substitute
work element by contacting Examination Services staff at
1-888-476-4238 option 2 at least 18 days prior to the scheduled
exam date. Technicians whose certification at Level IV is now
pending due to this change will be identified by an internal
computer audit and processed accordingly. Anyone who feels that
they now meet the Level IV examination requirements and does not
hear from NICET by July 1, 2003 should contact Certification
Services staff at 1-888-476-4238 option 3.

Source: http://www.nicet.org/about/news.htm

----------------------------------------------------------------

Improved products, services lead to fee increases
The NICET Board of Governors decided last month to continue with
the Institute's plans to enhance its certification programs and
improve the application process. NICET will continue to explore
more effective exam formats and how they might, in the future,
be administered more quickly and conveniently through computer-
based testing. As it prepares to introduce its highly anticipated
Video Systems programs, NICET will bolster its program
development and maintenance efforts with the addition of two new
staff members to its technical team. The additional staff will
also help speed up application evaluation time, which NICET
already trimmed by three weeks last year.

To fund these improvements, the NICET Board of Governors has
reluctantly decided, for the first time in three years, to
increase the examination fee along with a number of other NICET
fees. The new fees, effective for all applications submitted
online or postmarked September 1, 2003, or later, are highlighted
on NICET's online Fee Schedule. The Institute will honor current
fees for paid orders postmarked or submitted online through
August 31, 2003. 

Source: http://www.nicet.org/about/news.htm

----------------------------------------------------------------

This eighth edition of the Fire Alarm Systems program detail
manual does not contain any 
substantive changes from the seventh edition. Only the following
minor changes have been made: 
 
 o corrections to the Personal Tally Sheet 
 o addition of a training course 
 o deletion of Work Element 37001 and updating of the Examination
 Requirements Chart 

Source: http://www.nicet.org/nicetmanuals/alarms.pdf

----------------------------------------------------------------

Do you have your license renewal CEU's and CPD's? Sign up now and
earn *21 CEU's or CPD points by attending one of these seminars
coming soon to the Northwest!

------------------
April 22-24, 2003 Boise, ID
------------------
Intermediate Fire Alarm Seminar.
http://www.afaa.org/afaa/PDF/IntFA_Boise_April2003.pdf

------------------
April 29-30 & May 1, 2003 Seattle, WA
------------------
Intermediate Fire Alarm Seminar.
http://www.afaa.org/afaa/PDF/IntFA_Seattle_April2003.pdf

------------------
May 13-15, 2003 Billings, MT
------------------
Intermediate Fire Alarm Seminar.
http://www.afaa.org/afaa/PDF/IntFA_Billings_May2003.pdf

*21 CEU's & CPD's are based upon 21 classroom hours.
CPD (Continuing Professional Development) NICET recertification
requires 90 CPD points during each 3-year certificate cycle. See
NICET policy #30 for more information http://www.nicet.org/about
/policy30.htm.

----------------------------------------------------------------

I'm home this week.

Have fun!

Mike

================================================================
ET JOURNAL
================================================================

NICET Fire Alarm Systems Level III
35014 MULTIPLEXING
----------------------------------

35014 is a Level III General Non-Core Work element.

General Work Elements are categorized as either Core or Non-Core
Work Elements. All Level III General Core Work Elements
constitute a mandatory requirement for achieving certification
at Levels III and IV.

35014 DESCRIPTION
Understand the concept of multiplexing, how active and passive
multiplexing circuits operate, types of active and passive
systems and components, wiring methods, and the function of
microprocessor units. (Fire Alarm Signaling Systems) 

35014 REFERENCES:
Fire Alarm Signaling Systems
1994 version
http://www.nfpa.org/catalog/product.asp?category%5Fname=&pid=fas
s94

2003 version
http://www.nfpa.org/catalog/product.asp?category%5Fname=&pid=fas
s03

35014 DESCRIPTION BREAKDOWN:
"Understand the concept of multiplexing, how active and passive
multiplexing circuits operate, types of active and passive
systems and components, wiring methods, and the function of
microprocessor units."

Glossary of terms

Multiplexing. A signaling method characterized by simultaneous or
sequential transmission, or both, and reception of multiple
signals on a signaling line circuit, a transmission channel, or a
communications channel, including means for positively
identifying each signal.

Active Multiplex System. A multiplexing system in which signaling
devices such as transponders are employed to transmit status
signals of each initiating device or initiating device circuit
within a prescribed time interval so that lack of receipt of such
signal may be interpreted as a trouble signal.

Passive Multiplexing System. Passive multiplexing removes the
command to transmit and permits transmitters to report at any
time. The system becomes a one-way system with multiple
transmitters sharing the same communication channel or pathway.

Multiplexing is a signaling method characterized by the
simultaneous or sequential transmission, or both, and reception
of multiple signals in a communication channel including means
for positively identifying each signal.

There are two multiplexing methods; active and passive. Active
multiplexing is defined as the transmission of status signals
from an initiating device circuit or an initiating device to a
central receiving station upon command, enabling individual
identification of signals from many locations. Active multiplex
systems usually use a transponder or circuit to interface with
one or more initiating device circuits.

Passive multiplexing Removes the command to transmit and permits
transmitters to report at any time. The system is a one-way
system with multiple transmitters sharing the same communication
channel.

The microprocessor is the heart of a multiplex system and allows
for system diagnostics; incorporation of integrated systems; the
sensitivity of each smoke detector to be analyzed; automatically
operate system control points; provides system information for
management use.

Most multiplex systems permit T-tapping of initiating device
circuits allowing for a lower cost of installation.

The formats for two-way multiplex communications are ripple-
through, sequential counting, and digitally addressable.

Ripple Through
This format is a response to a start command, after which, each
device in turn transmits its status. One form completes the path
to the following device after completion of transmission from the
responding device. These devices are usually connected in a
series 2-wire circuit. The devices are not individually addressed
and therefore, T-tapping distribution is not allowed.

Sequential Counting
Requires individual address settings for each device. Each device
reports in turn after a synchronizing (reset) command and an
individualized transmit command in received from the control
panel. T-tapped distribution is allowed and no end-of-line
resistor is required. Operation with a single open is easily
achievable, and interrupt capability is not possible.

Digitally Addressable
Each station has a unique digital address making a random order
communication possible. When the response includes the address/
location of the station, interrupt capability becomes possible.
Addressable formats provide maximum functional flexibility but
requires the largest number of characters to communicate, which
slows down the polling cycle and requires higher speed
transmissions.

When addressable detectors are connected to a multiplexed loop,
the control point of the loop may in turn act as a transponder.

An analog detector transmits a signal indicative of the signal
produced by the environment, and simply repeats the signal from
its sensor in a form compatible with the data transmission format.

Analog detectors combined with addressable devices provide a
system whereby a detector reports the signal produced by its
environment to the control equipment and the decision to sound an
alarm or to respond in some other manner is made by the fire
alarm control unit. An analog system makes it possible to provide
“drift compensation” and maintain constant sensitivity over long
periods.

Detector sensitivity can also be easily changed via software to
accommodate changes in the environment and to protect difficult
hazards.

A coded fire alarm system is a passive multiplex system.

Fire Alarm Signaling Systems Chapter 4
Addressable devices using the ripple-through format require no
individual address, since the address is their position in the
sequential arrangement.

A simple coded fire alarm system is a passive multiplex system.
More recently, battery-powered radio frequency (RF) transmitters
have been introduced in passive multiplex systems and can
identify themselves and transmit this information when an alarm
condition occurs.


THE INFORMATION HEREIN IS PROVIDED AS A GUIDE ONLY AND IS
INTENDED TO ASSIST YOU IN PREPARING FOR AN EXAM. IT IS NOT
INTENDED TO BE INCLUSIVE OF ALL INFORMATION THAT MAY BE ON AN
EXAM BUT RATHER IT IS INTENDED TO BE A SMALL SAMPLE OF THE KIND
OF MATERIAL THAT YOU MAY BE EXPECTED TO KNOW.

================================================================
NICET TEST DATES
================================================================

OREGON
------
OR1 PCC Sylvania, Portland;
Test 4/26/03. Postmark deadline 3/8/03.
Test 7/26/03. Postmark deadline 6/7/03.

OR2 Clackamas Community College, Oregon City;
Test 6/21/03. Postmark deadline 5/3/03.
Test 9/27/03. Postmark deadline 8/9/03.

WASHINGTON
----------
WA1 Bates Technical College, Tacoma;
Test 5/17/03. Postmark deadline 3/29/03.
Test 7/26/03. Postmark deadline 6/7/03.

WA2 Walla Walla Community College;
Test 5/17/03. Postmark deadline 3/29/03.
Test 9/27/03. Postmark deadline 8/9/03.

WA3 Spokane Community College;
Test 5/17/03. Postmark deadline 3/29/03.
Test 8/23/03. Postmark deadline 7/7/03.

These dates are from the NICET web site. For a complete list of
all test centers and test dates, visit:
http://63.70.211.210/cfdocs/nicetschedule.cfm

================================================================
AFAA CLASS SCHEDULE
================================================================

------------------
April 22-24, 2003 Richmond, VA - Sponsored by VA AFAA
------------------
Advanced Fire Alarm Seminar.
http://www.afaa.org/afaa/PDF/ADV_Richmond_Apr2003.pdf

------------------
April 22-24, 2003 Boise, ID
------------------
Intermediate Fire Alarm Seminar.
http://www.afaa.org/afaa/PDF/IntFA_Boise_April2003.pdf

------------------
April 29-30 & May 1, 2003 Seattle, WA
------------------
Intermediate Fire Alarm Seminar.
http://www.afaa.org/afaa/PDF/IntFA_Seattle_April2003.pdf

------------------
May 5-8, 2003 Anaheim, CA - Sponsored by CAFAA
------------------
Fire Alarm System Testing and Inspection Seminar.
http://www.afaa.org/afaa/PDF/INT_TI_CAFAA_ANAHEIM_May2003.pdf
Intermediate Fire Alarm Seminar.
http://www.afaa.org/afaa/PDF/INT_TI_CAFAA_ANAHEIM_May2003.pdf

------------------
May 6-8, 2003 Chicago, IL
------------------
Advanced Fire Alarm Seminar.
More information will be available soon.

------------------
May 13-15, 2003 Billings, MT
------------------
Intermediate Fire Alarm Seminar.
http://www.afaa.org/afaa/PDF/IntFA_Billings_May2003.pdf

------------------
June 9-12, 2003 Sacramento, CA - Sponsored by CAFAA
------------------
Fire Alarm System Testing and Inspections Seminar
Intermediate Fire Alarm Seminar
More information will be available soon.

------------------
June 10-12, 2003 Alexandria, LA - Sponsored by LA AFAA
------------------
Automatic Fire Detection and Fire Alarm Systems Seminar (Fund.)
Fire Alarm System Testing and Inspections Seminar
More information will be available soon.

------------------
June 17-19, 2003 Las Vegas, NV
------------------
Intermediate Fire Alarm Seminar.
http://www.afaa.org/afaa/PDF/IntFA_LasVegas_June2003.pdf

------------------
July 14-17, 2003 Anaheim, CA - Sponsored by CAFAA
------------------
Plan Review Seminar
Intermediate Fire Alarm Seminar
More information will be available soon.

------------------
September 15-18, 2003 Oakland, CA - Sponsored by CAFAA
------------------
Plan Review Seminar
Intermediate Fire Alarm Seminar
More information will be available soon.

------------------
September 16-18, 2003 Boston, MA - Sponsored by New England AFAA
------------------
Fire Alarm System Testing and Inspections Seminar
Automatic Fire Detection and Fire Alarm Systems Seminar (Fund.)
More information will be available soon.

------------------
September 22-25, 2003 Lafayette, LA - Sponsored by LA AFAA
------------------
Fire Alarm System Testing and Inspections Seminar
Intermediate Fire Alarm Seminar
More information will be available soon.

------------------
October 15-17, 2003 Boston, MA - Sponsored by New England AFAA
------------------
Intermediate Fire Alarm Seminar
More information will be available soon.

------------------
November 3-6, 2003 Anaheim, CA - Sponsored by CAFAA
------------------
Plan Review Seminar
Advanced Fire Alarm Seminar
More information will be available soon.

------------------
November 4-7, 2003 Boston, MA - Sponsored by New England AFAA
------------------
Advanced Fire Alarm Seminar
More information will be available soon.

================================================================
COMMENTS AND ACKNOWLEDGEMENTS
================================================================

ET News is published weekly and if possible, delivered on Sunday

ET News website http://etnews.org by: http://metrodenver.org

The NICET acronym found herein refers to: http://www.nicet.org
NATIONAL INSTITUTE FOR CERTIFICATION IN ENGINEERING TECHNOLOGIES

The AFAA acronym found herein refers to: http://www.afaa.org
AUTOMATIC FIRE ALARM ASSOCIATION "AFAA is celebrating 50 years!"
----------------------------------------------------------------
Some information may be found within this email message that is
reprinted with permission from one or more of the following;
NFPA 70 National Electrical Code(r), NFPA 72 National Fire Alarm
Code(r), and NFPA 101(r) Life Safety Code(r), Copyright(c) NFPA,
Quincy, MA 02269. This reprinted material is not the complete and
official position of the NFPA on the referenced subject, which is
represented only by the standard in its entirety.
================================================================
                 Michael Baker & Associates Inc
503-657-8888 v | PO Box 737, Gladstone OR 97027 | 503-655-1014 f
----------------------------------------------------------------
ET News Copyright(c) 2003 by Michael B Baker all rights reserved
Send a link to a friend        
 

 

Home - Clients - Book Store - NICET Level I - NICET Level II - NICET Level III - NICET Level IV - Glossary - External Links - Licensing - Photographs - Employment - Disney Crud(SM) - Archives 2001 - Archives 2002 - Archives 2003 - Archives 2004 - Archives 2005 - Archives 2006 - Archives 2007 - Archives 2008 - Archives 2009 - Archives 2010 - Archives 2011 - Archives 2012 - Archives 2013 - Misc

ET NewsSM content copyright © 2017
by Michael B. Baker. All rights reserved.
ISSN 1554-074X

RSS Content
Some information may be found within this web site that is reprinted with permission from one or more of the following: NFPA 70 National Electrical Code®,NFPA 72® National Fire Alarm Code®, & NFPA 101® Life Safety Code®, Copyright© NFPA, Quincy, MA 02269.

This reprinted material is not the complete and official position of the NFPA on the referenced subject, which is represented only by the standard in its entirety.