Mot Fas Test Procedure - Omitec OmiSmoke Operating Instructions Manual

Test Procedures

MOT FAS Test Procedure

Before carrying out a MOT FAS test or any other FAS test, the engine must
first be verified safe and sound to proceed, and be running at normal
operating temperature. See section 'Preparation of Vehicle Prior to Tests'
for suggested full checks.
The MOT FAS TEST is a procedure that follows the statutory requirements of the
Diesel Exhaust emission test as described in the current Vehicle and Operator
Services Agency Inspection Manual, and is approved for testing the following:
(a) Car and Light Commercial Vehicle testing (Class II, IV & VII)
(b) Private bus testing (Class V)
(c) Public Service Vehicle (Class VI)
(d) Heavy Goods Vehicle
(e) Single Vehicle approval
The MOT FAS test also offers Reduced Pollution Certificate (RPC) testing within the
Category B menu.
The OmiSmoke will measure the Free Acceleration Smoke (FAS) output over the
whole speed range of an engine (no load from idle up to cut-off speed) where the
engine is accelerated against its own inertia.
A schedule of up to 6 accelerations will be prompted, leaving a gap of 10 seconds
between each. The engine should be at idle before the start of each test.
The OmiSmoke will automatically calculate a Pass or a Fail and print the result.
From the Main Menu, the operator can select which test is required, by scrolling down
the menu using the up and down buttons, and confirming the selection by pressing
the tick key.
20
CAT A
CAT B
CAT B
CAT B
CAT A