Searching for a replacement digital ammeter.

[Driver]

Hello and hope you are all having a great summmer,

The digital service battery ammeter on my 2013 Pearl 50 has failed. It is the same as fitted to earlier Fairline yachts (Fairline parts SKU 67175, no name on part except AX-314) Fairline Parts no longer has stock and nor does anybody else as far as I can find. It will look horrible if it does not match the existing instruments.

Any ideas, please? Or does anybody know of somebody who might repair my existing unit which has no visible problem?

 

[S04]

I can't help with sourcing a replacement but when you say it has failed, how has it failed? Is the display blank and unlit or does it read zero? You may already have done what simple diagnostics are possible, if so please excuse me. If the screen is blank then check that you have 12V across the 0V and V+ terminals. If it reads zero then check the wiring to the shunt from the signal connectors

AX311 (100A) and AX312 (200A) ammeters are available on ebay so perhaps yours is a 400A device? The cases on those look slightly different as they have "wings" to secure the meter to the panel.

 

[William_H]

All sorts of problems with sourcing a digital amp meter replacement. Cheap amp meters typically can only sense from a shunt in the negative load line. (or if shunt is internal can only sense in negative line. This is because internally one side of shunt input is connected to power supply negative. The only other option in this case is to use an isolating Dc supply to the meter or run it off a small battery.
More sophisticated digital amp meters can operate from a shunt in positive load line. Isolated from meter input supply.
So OP needs to know where shunt for existing meter is connected if in positive or negative load line. (shunt looks like a bar of metal mounted with connecting studs each end for load current and 2 small wires going to meter to sense current. ) ol'will

 

[Driver]

Thank you for your replies. Thanks for the AX312 tip, I have been up against a brick wall until now. I have checked the AX312 on ebay against mine and (apart from the wings) the dimensions etc. are identical. The only downsides are-
1) The max amps are 200 as compared with mine at 400. I can ensure that 200 amps are not exceeded, or, what would happen if I connected th AX312 instrument to the 400a shunt? accuracy is not critical.
1) The background lighting is yellow and the original instruments are all blue, can it be changed?

 

[billskip]

Thank you for your replies. Thanks for the AX312 tip, I have been up against a brick wall until now. I have checked the AX312 on ebay against mine and (apart from the wings) the dimensions etc. are identical. The only downsides are-
1) The max amps are 200 as compared with mine at 400. I can ensure that 200 amps are not exceeded, or, what would happen if I connected th AX312 instrument to the 400a shunt? accuracy is not critical.
1) The background lighting is yellow and the original instruments are all blue, can it be changed?

Try giving Pullman instruments a

 

[S04]

As far as I can see the AX312 on ebay is no longer available. I am pretty sure I remember that the shunt was 75mV at 200A. The AX311 that is still available has a shunt with an output of 75mV at 100A. You would need to check the shunt you have but if, along the same lines then it might be 75mV at 400A so using an AX312 would mean that at maximum output the AX312 would be reading 200A against a true current of 400A so essentially you'd have to double whatever current is shown. That is a guess and would need to be confirmed by checking your shunt.

As for the colour, then to my knowledge I don't think that is going to be something that could be altered I'm afraid.