How To Install A Hour Meter On A Diesel Engine
- #1
Evening,
Having (nearly) fixed the engine I decided the addition of an hours meter would be a good idea - hours since refit, filters etc. I bought i. It arrived. No wiring instructions. Anyone know how to wire the matter to a Diesel engine and so it only runs when the engine does (apparently) ? Personally I would have the +ve from the alternator, about correct?
Cheers.
- #2
Doing the same for my VP 2003. There volition exist a positive switched supply on your engine panel, which becomes alive when you switch on the console, before starting the engine. Exercise you accept an engine wiring diagram?
- #3
I second that - just wire it into the ignition switch. Information technology only runs when the switch is on and its only on when the engine is running.
- #4
The to a higher place solutions volition not requite accurate engine hours if the power to the engine ("ignition" when information technology is not really ignition) is turned on before engine showtime or left on eafter engine stop. Probably OK for your purposes but will keep counting if engine is stopped and ability not switched off.
In a standard set up for alternator charging the output line is connected directly to the batteries at all times. This means clock will tick over at all times batteries are turned on.
A vsr could exist used to sense when the alternator is charging. ie engine is running.
A relay could be connected to find when oil pressure switch has operated so turning calorie-free off. The relay is wired to operate when oil light is on. The power for the clock comes from the engine panel power on via commonly fabricated contacts on the relay so contacts open up if no oil pressure. (the relay converts a logic 0 to a logic 1.)
Another option is to switch a relay with the ouput from the W or Aux sense terrminal on the alternaor which has a kind of pulsed Dc (or is it AC) when alternator is charging. This is almost 6v boilerplate so may need a sensitive relay. The relay switches the clock on.
There are few options practiced luck olewill
- #5
VicS
Well-known member
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- 13 Jul 2002
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What William says may well be correct only the common exercise is to wire as suggested to an "ignition switch" controlled circuit. In later VP panels ITYWF thatthe hr counter was merely function of the tachometer and ran while ability was applied to the tacho and other instruments.
Your engine command panel has a tacho I assume. Connecting, via a fuse, to the power supply to that may be the easiest matter to do
- #half dozen
I wired my engine hour meter with the positive to the ignition switch and the negative to the oil pressure level switch which closes when oil force per unit area is higher up 10psi so it only runs when the engine is running with oil pressure.
If the oil pressure switch is airtight with no pressure a relay of transistor con be used to opposite action.
If yous have a water menstruum switch similar the RS i that could as well exist used in a simular way.
- #7
I note the engine hours in the log. Simple and works every time.
- #8
When the original counter on my VP 2022 failed (as normal!) I wired an electromechanical rather than LCD counter to D+/61 on the alternator. With "ignition" on and engine stopped that merely shows most 5V, not enough to start the counter running so it only records genuine engine running hours. Also you can read it ability off, and information technology'due south fitted in the engine bay rather than chopping an extra hole exterior near the control panel..
- #ix
What William says may well be right but the common practice is to wire as suggested to an "ignition switch" controlled circuit. In subsequently VP panels ITYWF thatthe hour counter was simply office of the tachometer and ran while ability was practical to the tacho and other instruments.
Your engine control panel has a tacho I presume. Connecting, via a fuse, to the power supply to that may be the easiest affair to do
That'll do for me- the is a tacho so I will piggy back off that.
Thanks
- #ten
Same blazon - but as I never exit the engine ignition on when its not running and the switch is easily accessible from the engine bay I recall I will go with the ignition switch. I am as well making some other smaller 'instrument console' for a fuel gauge, the hours meter and a bombardment condition monitor, none of which exist a the moment.
- #11
Wired my hours run meter to the engine primal switch. When it is turned on the buzzer makes a racket until engine starts and when switched off buzzer sounds again until central is switched off. That modest corporeality of time isn't relevant to the time between oil changes etc. I put mine in a panel I fabricated up. see pic.
- #12
I get an alarm if I exit my ignition on for more than 30 seconds, and then I've always considered this to be a perfectly adequate solution.
I was surprised to find that the VP tachometer counters do really require a tach signal to count, which in my case is a PITA because I want to ready my new one to the correct reading. A little messing effectually with a signal generator sorted it out.
- #xiii
Wired my hours run meter to the engine key switch. When it is turned on the buzzer makes a racket until engine starts and when switched off buzzer sounds again until fundamental is switched off. That small corporeality of time isn't relevant to the time between oil changes etc. I put mine in a panel I made upwardly. encounter pic.
View attachment 40390
Thanks - what is the material the instruments are mounted on?
- #14
It was made from textile that, I , Er...acquired. The aluminium is expert quality and I am told it is corrosion resistant. Run across pics...
- #15
VicS
Well-known member
- Joined
- 13 Jul 2002
- Messages
- 46,746
Then you are the ane who nicks the diversion signs leading to the states all rushing round like chickens with no heads trying to find which way we should go!
- #16
No VicS, I did acquire the sign legally, honest. Subsequently carrying out roadworks, a contractor left a lot of stuff dumped on state I administrate and after several requests to remove it I got fed up and sorted it myself. Anyone want some solidified tarmac?
- #17
ROFL!
As an aside, if one wanted to go the plastic route, what would be all-time?
- #18
- #19
ROFL!
As an aside, if 1 wanted to go the plastic route, what would be best?
See if yous can obtain a material called "Traffolyte". I think that is a generic name, there are other similar materials for labels available. This is a rigid plastic textile which can be bought as a laminate made of different coloured layers to enable it to exist engraved. This volition give, for instance, white lettering on a black background. Information technology is also non-conducting. If thick enough it tin be drilled and filed to use as a panel on the forepart of a switch box. I have found it to be a flake brittle so become information technology thick plenty to take the stresses.
- #20
I take a fairly big, thick length of what I will call 'sign makers plastic' - I would have one time called it Perspex, but not so sure anymore. Though about using that as it would look quite dainty. Any good?
Also got a blue bit that is the same colour as the spray hood - thinking of making a set of semi-opaque wash boards out of that. Love recycling.
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