I’ll assume then that the test was carried out after May 20?
Not all gas analysers had been updated at that time and a delay has been allowed until September for all equipment manufacturers to get their software produced and sent to all garages.
In the mean time where the plate limit is readily available that limit must be used, so a car that should be equal to or less than say [0.51] but produces a printout with a result of say [1.01], which is below the [1.5] limit will still fail the test. The printout will say it PASSED, but legally its a fail.
If when conducting the smoke test during the first three runs while depressing the throttle pedal fully to WOT and then immediately off, the tester may notice after the engine has returned to idle that the smoke machine display shows a reading like this [—], this means that the smoke machine recorded a value that was seen outside the operating range, records it but disregards it, hence you will see it on the printout, but the analyser will continue until up to six free runs have been completed because the software has calculated values outside the range.
The customer will not see this on the printout, and the results of the printout when calculating the result could become confusing because of it.
