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 Help! LM-1 losing logs. 
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Joined: Sun Jun 23, 2013 1:41 pm
Posts: 366
Location: Phila. Penn.
Help! My LM1 shows it is recording, but when I go to download, some or all sessions aren't there.
Specifically, the first time out after 3-4 years, it remembered two new sessions out of 3 or 4 recorded.
Next time (3 hr drive) I reset (cleared) the log and got one 5 second session.
Return trip. none.

Tested the 9v Battery and its good.
Reloaded the firmware, ver 1.42
Just went back to retest, started engine and recorded 1 log with LM1 alone, and shutdown.
Hooked up the Aux box, Started engine again and recorded like that.
Take the LM1 home and the only thing it downloads is the 5 second session from the 3 hour trip.

Any ideas? Did someone else go through this, and I just can't find the thread?

- Matt


Sat Jun 11, 2016 5:37 pm
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Joined: Sun Jun 23, 2013 1:41 pm
Posts: 366
Location: Phila. Penn.
I spoke with Innovate's tech person on Monday. The fact the LM1 indicated it was resetting and recording pointed to hardware failure. He couldn't recall off the top of his head the specifics of the read/write storage on the LM1 but thought it was the eeprom. They don't have/can't get/not worth servicing the boards.

However when checking the 9V battery (again), the connector had broke. Now supposedly the 9V isn't needed for storage, but IIRC my past experience it in fact did effect logs. So I soldered the wire to the back of the snap and a few days later gave it shot. Guess what? Logs are storing again. Random chance? Don't know. I already ordered an LM2, which I will likely keep as it there is some convenience to just removing the SD card, and it has 1/4-20 mounting thread in the back.


Attachments:
IMG_0100.JPG
IMG_0100.JPG [ 94.64 KiB | Viewed 297 times ]
Fri Jun 17, 2016 12:49 am
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Joined: Fri Feb 08, 2013 2:37 pm
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My 10 year old LM-1 is still chugging along, works good just like it always has. Those little battery connectors are troublesome, I fixed one recently in a Radio Shack DVM I've had for 20+ years ........ how time flies


Fri Jun 17, 2016 12:01 pm
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Joined: Sun Jun 23, 2013 1:41 pm
Posts: 366
Location: Phila. Penn.
So what does that 9 volt battery do?
Is the battery connector to 2 pin assembly something standard in the electronics industry?

It's still having a semi-random problems, now only with the Oxygen sensor channel.
It's not completely random because I found I could cause changes (visible on the screen display) by simply picking up or squeezing the LM1 from the battery end.

Before heading back to the house, I opened the battery compartment and flipped the battery over so the wires lay on the outside where there was less chance to be pinched. It seemed better (didn't react to being lifted) but the logs show that while all the other channels were recording, the O2 would sometimes have problems. This happened more at higher speed - higher load but not consistant.

I was just going to put the LM2 on to see if it made a difference. But apparently it needs a different cable to work with the older LSU 4.2 sensor. :(


Attachments:
File comment: session 1 - idle, OK.
Session 2 - problem begins
Between 10 - 11, flip battery.
after session 14, some good logs

2016-6-18.log [372.32 KiB]
Downloaded 10 times
Sun Jun 19, 2016 10:13 am
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Joined: Fri Feb 08, 2013 2:37 pm
Posts: 1701
It sounds like you might have a cold solder joint somewhere on the circuit board, most likely where one of the external cable sockets is connected to the board, or perhaps the 9V battery leads. The clue that there is likely an insecure connection (cold solder joint) is it reacts when you apply a force "picking up or squeezing the LM1 from the battery end" that slightly distorts the PC board.

This is a snip from the LM-1 instructions:
Note that the 9V battery is for powering the LM-1
electronics and display, but it cannot power the oxygen sensor. (The primary purpose for the
9V battery is to power the LM-1 when it is connected to a PC for data downloads). You must
have a 12V power supply available to power the oxygen sensor.
Note: The supply voltage to the LM-1 must not exceed 16V.

.... and another:
In a typical permanent installation the LM-1 will be powered by switched 12V from the vehicle
(12V switched on when the ignition key is turned on) while its power switch is permanently on.
Because the LM-1 automatically switches to internal battery power when it does not detect 12V,
the internal battery would drain quickly while the vehicle is parked. To avoid this, do not install the
9V battery. The LM-1 will function correctly without it and will be able to record as usual. To
download recorded data, follow the alternate steps described in chapter 9.


Sun Jun 19, 2016 4:46 pm
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Joined: Sun Jun 23, 2013 1:41 pm
Posts: 366
Location: Phila. Penn.
The LM-1 will function correctly without it and will be able to record as usual. To
download recorded data, follow the alternate steps described in chapter 9.


Thanks. That seems reasonable. I saw that statement but didn't fully believe it as section 9.7 is missing from my instructions (version 3.0). I got caught in the trap of thinking 9v wiring is related to O2 sensor workings. Loose I can find, tracking a cold solder joint is not something I've done before but I'll look.


Sun Jun 19, 2016 5:07 pm
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Joined: Fri Feb 08, 2013 2:37 pm
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Web search "cold solder joint"


Sun Jun 19, 2016 6:56 pm
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