FC datalogit decimal value (AFR)

[azerty]

Hello guys,

I'm getting crazy with FC datalogit,
when I do Air/Fuel Map watch logs, I get plain number like "15" "14" "13" "12". i want to be able to read decimal value like "13.2" "11.7" etc.

I know it can be done, but I don't find where is that setting !!

help

 

[dac69er]

i can help you when i get home mate as dont have the software at work. i imagine the scaling is wrong somewhere, but been a few months since i have touched it and even longer since i set up my afr logging on it.

what unit are you logging the afr's off?

 

[azerty]

I use Innovate LM2.
both wideband and datalogit are setup to 0 volt = 10:1 . 5 volts = 20:1
Now a friend told there is a seting to change to activate decimal reading. But I haven't been able to find it

 

[dac69er]

just had a look mate. really simple.

i assume you have it in a little watch box that loads up with the datalogit software? just double click on the box and you can choose how many decimal points you want it to go to at the bottom of the popup!

 

[babu_rashu]

I use this setup
0 V = 9 A/F
5 V = 16 A/F
for few months and I don't have any problem...

and u can try

0v = 7.35
5v = 22.39

 

[dac69er]

0v = 7.35
5v = 22.39

those figures given by innovate are probably the best ones to use. gives the most consistently accurate readings, ive never found the need to change them.

 

[azerty]

just had a look mate. really simple.

i assume you have it in a little watch box that loads up with the datalogit software? just double click on the box and you can choose how many decimal points you want it to go to at the bottom of the popup!

ah, great ! thanks

BTW, anyone would know the difference between basic and advanced watches ?

 

[dac69er]

ah, great ! thanks

BTW, anyone would know the difference between basic and advanced watches ?

i have read that you should log both to get a better idea of what is happening. i persoanlly use basic all the time as it seems to correspond more with the readings on the commander.

 

[azerty]

yes I have read engine check light is directly related to basic values.
but still doesn't explain what is different between the two.

I'm getting uge AFR ready offset problem ATM
map watch and LM2 are around 0.7 offset. what worry me is that is it not even a constant offset
I've tried two set ups :

Setup 1
0v = 10
5v = 20

Setup 2
0v = 7.35
5v = 22.39

setup on both datalogit and LM2

 

[azerty]

finaly I ended up with this :

datalogit
0v = 10
5.5v = 16

LM2
0v = 10
5v = 16

and it works. I get max offset 0.1 now, which is fine enough

 

[dac69er]

strange. i use an lm1 so its a bit different i suppose. i never had a trouble using the specified range, but if that works for you then thats fine mate.

how have you wired yours into the datalogit box? have you just used analogue input 1 or have you gone across 1 and 2?

 

[weeJohn]

Advanced allows you to log all these.....

RPM
PIM; Pressure Sensor (Map sensor) (0~24000 boost)
AFL V
VTA V
INJ ms
INJ +/-
IGN
Dwell
Boost
Duty; Wastgate solenoid duty cycle
WtrT; Water Temp Sensor
AirT; Intake Air Temp Sensor
Knock; {N-2 Knock Value}
BatV
Speed
O2S; Stock O2 Sensor 1
O2S; Stock O2 Sensor 2o Inj Duty; Injector Duty time


Basic only allows you log these......

Inj Duty; Injector Duty time
IGN Tmng; Ignition Timing
Air Flow
Eng Rev; Rpm
Speed
Boost
Knock {N-2 Knock Value}
Wtr Temp; Water Temp
Air Temp; Manifold inlet Air Temp
Bat Volt

 

[dac69er]

but what azerty is getting at as that when you compare basic and advanced watches you get different values. so which one is correct? or what are the differences between them?

 

[weeJohn]

I have never seen any difference between the values when I logged basic and advanced on different runs, I dont always compare them but so its possible I have missed something. There is a limit to how much data can be recorded at any one time, it may be that if you are logging a lot of values at once then there will be less data per value recorded. Then the graphs will join the dots as such and show minor dfferences as its less accurate.

Setting up a map watch for what you want to log does as good a job imo.

 

[azerty]

how have you wired yours into the datalogit box? have you just used analogue input 1 or have you gone across 1 and 2?

I used both AN1 and AN2. I don't know why I got that offset. I read on an other forum it is quite normal. AEM ECU has even a field for AFR signal correction apparently