Just passed MOT with the following advisory - "No acceleration detected from smoke meter", does anyone know what this means?

Thanks

Shaun

The smoke emitted from diesel (compression ignition) engined vehicles is assessed for its density. It is carried out by the use of an approved and calibrated smoke meter.

The engine will be accelerated up to governed speed and the density of the smoke measured.

After the third acceleration the average reading is recorded. If the reading is below 2.5m-1 for non-turbocharged engines or 3.0m-1 for turbocharged engines the vehicle will pass.

However if the average is higher, a further acceleration is carried out and the average of the last three readings are used, this will continue until a maximum of six accelerations have been carried out.

If the average of the fourth, fifth and sixth acceleration is higher than the appropriate level the vehicle will not pass the test.

In addition to the smoke meter readings, any of the following will result in the vehicle being refused a certificate:

exhaust emits excessive smoke or vapour of any colour, to an extent likely to obscure vision
emissions cannot be measured because a tail pipe is damaged or an accessory is fitted which prevents the insertion of the smoke meter probe
insufficient oil in the engine or low oil pressure which could cause engine damage if engine is accelerated

You the man Mick

Thanks for the answer Joker, but still not sure what the comment on my MOT means.

I think it means his smoke meter is broken.
I once had a diesel car tested with the tester using the probe for petrol engines, he couldn't understand why the readings were so low. Car passed, never told him.

I rang the Main Dealer who handled the MOT and they told me the car was running so clean, it could not be detected, so a good rather than a bad advisory.