Data Logger DL1 Mk2, PCB soldering

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peter030371
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Re: Data Logger DL1 Mk2, PCB soldering

Postby peter030371 » Sat Nov 07, 2020 8:33 pm

Just to add there are some fake/cheap Chinese sensors about but the one I got from BHP seemed really good quality and £10 cheaper than buying from RT ;)
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pigeondave
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Re: Data Logger DL1 Mk2, PCB soldering

Postby pigeondave » Mon Nov 09, 2020 3:42 pm

peter030371 wrote:Just done a bit more digging around.

I checked them in the temperature chamber at work and both worked well from room temperature up to 120C :D


Brilliant, thanks for the info. I'm juggling a few things at the mo, but will keep this updated.

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UPDATE Data Logger DL1 Mk2, PCB soldering

Postby pigeondave » Thu Apr 08, 2021 2:18 pm

Right so coming back to this I've got myself a Bosch 0 281 002 412 Temp sender, It has a M14 x 1.5 thread on it so should screw into the zetec sump plug.
Its also got a proper connector to keep the detritus out.

My question to the gang is, what do I use as a 1k ohm pull up resistor? I've looked on mouser and there's all sorts. Thick film, think film, metal film....

Does anyone have an idea on what to get. I only want to do this once so don't mind spending out for a proper resistor. I'm not going to the bay of E for Chinesium ones.

obfripper
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Re: Data Logger DL1 Mk2, PCB soldering

Postby obfripper » Thu Apr 08, 2021 8:15 pm

A 1% tolerance thin film resistor should cover your application, 0.25w or higher.

Dave

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pigeondave
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Re: Data Logger DL1 Mk2, PCB soldering

Postby pigeondave » Sat Apr 10, 2021 8:38 am

obfripper wrote:A 1% tolerance thin film resistor should cover your application, 0.25w or higher.

Dave


Many thanks

Should I have the resistor closer to the data logger so that the white signal wire is shorter?
I can't see wire length being an issue really but what the typical way of doing it?

obfripper
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Re: Data Logger DL1 Mk2, PCB soldering

Postby obfripper » Sat Apr 10, 2021 10:06 pm

That's a tricky one to say, but if you place the resistor close to the dl1 then you will only have 2 wires going all the way to the sensor, if the resistor is close to the sensor then you will have 3 wires that could potentially pick up interference but tbh you're probably only looking at fractions of a degree interference either way.

Oe temp sensor wiring is generally not shielded, or even twisted pair wires, i don't know how the factory dl1 sensor wiring is arranged, but i doubt they do much different.

Dave

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peter030371
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Re: Data Logger DL1 Mk2, PCB soldering

Postby peter030371 » Sun Apr 11, 2021 10:01 am

I've got thousands of spare 1k resistors at work, send me address and I will stick a few in the post ;)

On my dash2 pro setup I put all the pull ups on the back of the dash connector and it works fine plus reduces a few longer wire runs
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pigeondave
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Re: Data Logger DL1 Mk2, PCB soldering

Postby pigeondave » Mon Apr 12, 2021 10:36 am

obfripper wrote:That's a tricky one to say, but if you place the resistor close to the dl1 then you will only have 2 wires going all the way to the sensor, if the resistor is close to the sensor then you will have 3 wires that could potentially pick up interference but tbh you're probably only looking at fractions of a degree interference either way.

Oe temp sensor wiring is generally not shielded, or even twisted pair wires, i don't know how the factory dl1 sensor wiring is arranged, but i doubt they do much different.

Dave


Brilliant, thanks for confirming my thoughts.

peter030371 wrote:I've got thousands of spare 1k resistors at work, send me address and I will stick a few in the post ;)

On my dash2 pro setup I put all the pull ups on the back of the dash connector and it works fine plus reduces a few longer wire runs


Thanks for the offer. I'll PM you my address. :D

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peter030371
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Re: Data Logger DL1 Mk2, PCB soldering

Postby peter030371 » Tue Apr 13, 2021 9:35 am

pigeondave wrote:Thanks for the offer. I'll PM you my address. :D


Popped in the post box last night ;)
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pigeondave
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Re: Data Logger DL1 Mk2, PCB soldering

Postby pigeondave » Tue Apr 13, 2021 10:34 am

peter030371 wrote:
pigeondave wrote:Thanks for the offer. I'll PM you my address. :D


Popped in the post box last night ;)


Ohhh exciting!!! Many thanks.


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