Demo test

You should always use it where it’s possible to do so.

Why try cutting corners already, you in a rush?

I’ve been present at at least half a dozen demo tests in the last 12 months and never once had a breeze on the emissions test.

We’ve also been reprimanded for not using rpm (and/or temp) measurement.

Technology has seriously moved on in the last fifteen years. Not many if any SI engines use spark plug leads anymore. What type of emissions equipment have you got? I'd of thought the minimum standard nowadays would be OBD. Plug the dongle in and let the analyzer do the RPM measuring for you. 

tecalemit combined tester 2021 spec has a sensor that sits on the engine but does not appear to 100% effective will have a play if its needed to be used for demo test

The manual is clear on when to use the rpm and temp devices for both petrol and diesel testing ,basic emissions it states rpm device “Or” engine tachometer ,and yes if it’s extended test or diesel then the devices need to be used .

Unless I need to conduct an extended test or diesel test I never use the rpm pick up

Just out of interest I’ve already done it ,

Just out of interest why do you ask ,if your unsure I can point you in the direction or even provide support if you like

I've never been pulled up on using the Rpm gauge before .  had one try to reprimand me for not signing a emissions printout before until I pointed out we have to keep a copy for 3 months it doesn't say we have put our signature on them

Use a subjective estimate ,sure you have experience/ knowledge to perform that ,as long as the outcome of the test is the right one for the presenter .

It’s all I do on very rare occasions,what else can you do .

That's also because they can be stored digitally. So long as they can be recalled when required it does not matter whether on paper or electronic.