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Go Back   SailNet Community > On Board > Gear & Maintenance > Electronics > Digital vs. Analog engine gauges
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Thread: Digital vs. Analog engine gauges Reply to Thread
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Topic Review (Newest First)
09-26-2012 03:52 PM
L124C
Re: Digital vs. Analog engine gauges

Quote:
Originally Posted by asdf38 View Post
L124C, what did you end up finding for oil pressure/temp? Did you look into the tachometer? I'm just beginning to think about gauges myself and hope to make up a new engine panel over winter. I'm unimpressed with my stock Yanmar panel which is disintegrating in it's Th year and populated with incandescent lamps and untrustworthy wiring. It's in the cockpit so everything will have to stand up to weather.
Still working on installing the battery monitor. My priority was monitoring the charging system. I'll have to replace the senders to put gauges on the oil and water (tach was never an issue), so I will probably wait until I have an issue with the Yanmar panel. Interesting that your Yanmar panel is falling apart. Mine is almost 30 old and still works great. I liked the gauges discussed earlier in this thread because I could tie them to existing alarms. However, if your alarms are spotty, this obviously isn't an advantage. In any case, I would certainly want alarms with any gauges I purchased. After all the discussion about needle position in this thread, it occurred to me that I couldn't tell you where the normal temp or charge positions are on the gauges in my truck! I would be more diligent with gauges on my boat due to the consequences of not having a motor at sea, but am not exactly a motor head. I still want back up.
09-25-2012 11:27 PM
asdf38
Re: Digital vs. Analog engine gauges

L124C, what did you end up finding for oil pressure/temp? Did you look into the tachometer? I'm just beginning to think about gauges myself and hope to make up a new engine panel over winter. I'm unimpressed with my stock yanmar panel which is disintegrating in it's 15th year and populated with incandescent lamps and untrustworthy wiring. It's in the cockpit so everything will have to stand up to weather.

My first thought was to just recreate the current functionality with higher quality hardware - LED indicators for alarms, new tachometer, new engine gauge (may stick with audible alarm). Possible additions include voltage meter and nav/spreader light switches.

This catches my eye initially. But I know nothing about this company etc. Lots of research will follow.
VDO Marine Viewline Tach+ Gauge
09-23-2012 10:25 PM
Stu Jackson
Re: Digital vs. Analog engine gauges

You might want to reconsider the ammeter in your cockpit panel.

Why? Because, usually, all the charging has to run through the ammeter for it to work and they are usually installed with small wiring. You really don't want to have your charging run through small wires from the alternator to the cockpit panel and then back to your batteries.

Ammeters & Shunts 101: Ammeters & Shunts 101
09-23-2012 05:08 PM
L124C
Re: Digital vs. Analog engine gauges

Quote:
Originally Posted by L124C View Post
Installed the Microlog battery monitor and Shunt. Piece of cake! .
Oooops...spoke too soon. Turns out I didn't fully understand what I was doing. I think it was a combination of lack of understanding on my part, and possibly the directions not being quite clear enough for the novice electrician. I suspected as much, so I posted this thread:
http://www.sailnet.com/forums/electr...tml#post925507
09-18-2012 04:14 PM
hellosailor
Re: Digital vs. Analog engine gauges

I've never seen the Microlog shunt, and for $90 a shunt could be custom sculpted and gold plated by a dedicated machinist.

But I have seen typical US-made shunts, and some cheapass Chinese shunts, and it doesn't take long to figure out which one is going to be more stable long-term. Sometimes quality tells. Good fitment, solid contacts, tight screw threads...If $90 is excessive, well, you've got to figure you're buying into their whole package, and it all should average out.

Of course, we also used to scavenge old toasters from the trash to get free nichrome wire (damned expensive to buy new!) and some stuff just gets sold for way more than what it would seem worth in this world.
09-18-2012 03:08 PM
L124C
Re: Digital vs. Analog engine gauges

Installed the Microlog battery monitor and Shunt. Piece of cake! I initially balked at the $90 price for the shunt, but it is a substantial piece of hardware. Looks like something a power company would use!
Microlog supplies everything needed except the ground wire to connect the shunt to the batteries. Ordered that from Genuinedealz.com, another great resource.
The Microlog Gives me:
Voltage of both batteries and high/low voltage alarm.
Charging (from all sources) and discharging rate in Amps.
The monitor can also be turned off (something I didn't pick up in the sales info).
09-06-2012 06:53 PM
tommays
Re: Digital vs. Analog engine gauges

I have been able to plug any motor function into my nmea 2000 GPS going back almost 7 years ?



To be honest i yet to bother moving the unit onto the Cal 29 as the handheld tells me enough and i would still want and need the POD

At the price of some of those gages you would be well into a 4" nmea 2000 dispay
09-06-2012 06:33 PM
hellosailor
Re: Digital vs. Analog engine gauges

"I found it interesting that the review stated proper installation of any of the systems would be unlikely by a weekend warrior."

See, a true Weekend Warrior, aka National Guardsman, would only have his rifle and mess kit to work with. Neither of which is much use for electrical installations, unless you use the rifle to take hostages from an electrician's place. Which most NG won't do, as a mattter of principle, leaving them with no tools to do the job with.
09-06-2012 04:47 PM
L124C
Re: Digital vs. Analog engine gauges

Quote:
Originally Posted by hellosailor View Post
That's great. Apparently they've got two well-behaved LEDs in there then, pulling 35mA. Which would still 25 amps if left alone for one month.

Similar to a car stereo or alarm system or old clock, enough to impact a less-than-perfect battery, but small enough to ignore for a week or three in healthier system, like the 90AH they mention.
That's 35mA at full back light intensity, which (hopefully) would only be used while underway at night.
In any case, I went with the Microlog battery monitor mentioned in this interesting review. http://www.maxvu110.com/psbm.pdf. As the review says: A simple system for a simple boat (such as mine). It will give me Volts for each battery, and Amps from the alternator. Has low and high voltage alarms and I still have the factory Yanmar alarm (good for me, as I'm not one to watch gauges on a regular basis). Also made in Canada, not China (important to me). The one downside is that it needs to be mounted inside. However, I have limited cockpit mounting space anyway, so this wasn't a big drawback. I'll be able to see the Microlog from the cockpit anyway. The engine gauges will definitely go in the cockpit.
I found it interesting that the review stated proper installation of any of the systems would be unlikely by a weekend warrior. Microlog says it's a piece of cake. I'll find out!
09-05-2012 01:30 PM
hellosailor
Re: Digital vs. Analog engine gauges

That's great. Apparently they've got two well-behaved LEDs in there then, pulling 35mA. Which would still 25 amps if left alone for one month.

Similar to a car stereo or alarm system or old clock, enough to impact a less-than-perfect battery, but small enough to ignore for a week or three in healthier system, like the 90AH they mention.
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