Hi Jim,
I read the SWRI assessment of your machine from May 1984. http://nepis.epa.gov/Exe/ZyNET.exe/910123W7.txt?ZyActionD=ZyDocument&Client=EPA&Index=1981%20Thru%201985&Docs=&Query=&Time=&EndTime=&SearchMethod=1&TocRestrict=n&Toc=&TocEntry=&QField=&QFieldYear=&QFieldMonth=&QFieldDay=&UseQField=&IntQFieldOp=0&ExtQFieldOp=0&XmlQuery=&File=D%3A\ZYFILES\INDEX%20DATA\81THRU85\TXT\00000022\910123W7.txt&User=ANONYMOUS&Password=anonymous&SortMethod=h|-&MaximumDocuments=1&FuzzyDegree=0&ImageQuality=r75g8/r75g8/x150y150g16/i425&Display=p|f&DefSeekPage=x&SearchBack=ZyActionL&Back=ZyActionS&BackDesc=Results%20page&MaximumPages=1&ZyEntry=5 Hardly an impressive piece of work as there is no description of the machines tested, their working principles or even any photographs. The test work looks reasonable enough, which is probably all that the US EPA wanted (not known for throwing money at consultants). It appears that this is purely a CO analyser and from the description it is similar to the Colourtune unit that was on sale in the UK for many years. This had a pipe that was inserted in the exhaust pipe and the sample flow rate was controlled by a pulse valve at the meter end that let just enough exhaust through the measuring head for every exhaust pulse. The measuring head worked on heat transfer from the gas changing the resistance connected in the meter bridge circuit. Heat transfer would vary according to the CO content. In theory anything but accurate but I used mine to set the CO level when building my Beauford and no one ever complained about it being incorrect. I note that in the above text, the Peerless unit read the same as the reference meter at around 3% CO, which was the critical level at the time these things were being sold so not so bad when new. Away from that region, it read high at low CO levels and low at high CO levels. These levels would probably be untenably high compared to today’s requirements – after 11 years of retirement I no longer bother to keep up with the regulations, just how little tax I have to pay if I have a vehicle with sufficiently low CO2/mile over the EUDC. So what can we glean from what you have told us? If the meter zeros and spans then this suggests that the main electrical circuit is intact. It is then a matter of whether the measuring resistance is intact and only a meter across each component can decide this but watch out for misleading readings from parallel or bridge resistances. If you can blow through the pipework then that eliminates a blockage and should send the meter off scale as you would overload the sensor. I cannot add much more. I remember the sensor was stuck to/embedded in some background material to provide a controlled level of heat transfer away from the sensor and that the pulse valve was a simple diaphragm affair with little chance of being repaired if it ruptured. Cheap and horrible but sufficiently useful to avoid a failed MOT. Hope that this sheds some light on the subject. Hamish From: quantumowners@googlegroups.com [mailto:quantumowners@googlegroups.com] Sent: 05 February 2015 16:52 To: quantumowners@googlegroups.com Subject: [Quantum Owners] Exhaust Analizer Hi all I know that this is not Quantum specific but there are some clever people out there (creep). I have aquired a Peerless Mod 6000 Exhaust analizer which does not work. The meter works & zeros so I am assuming that the sensor is faulty. Would a lambard sensor replace this, or any other suggestions appreciated Jimt -- -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To post to this group, send email to quantumowners@googlegroups.com To unsubscribe from this group, send email to quantumowners-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/quantumowners?hl=en IMPORTANT NOTE: All information presented herewith is provided on an "As Is" basis, without warranty or the implication thereof. Neither the Quantum Owners Club nor the individuals associated with the Quantum Owners Club or in the preparation of the above information shall have any liability to any person or entity with respect to liability, loss, or damage caused or alleged to be caused directly or indirectly by the instructions contained within this or related message(s). --- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to quantumowners+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
