Digi Cool sensor mod......

[Pascone10]

i loved the Cooper red clamp but they would only last a season. for 120 a pop(i think that's what they were) i had enough after a few. i have quite a few of those pipe straps that come with the Cooper boxes but never cared for them so i was going to try them in my test modification ..

What failed on the Red Clamps? Im about a year in with mine and so far so good. I really like them as well as the strap pipe sensors...
I am still going to pick up another set to use with the 1250's and see how that works.. From the get go when I bought the Dc's I never used the clamps because the temp reading was off. I brought in the cooper box and the DC's.

Now I would really like to see an accurate reading on the 1250, thus the reason for the modification...


It will be interesting to see what comes about with this new ak900 style thermistor..

[Thomasg]

I have my ak mod with the Cooper straps , I haven't noticed any temperature problems.

[derb]

I have my ak mod with the Cooper straps , I haven't noticed any temperature problems.

Have you bothered to check? I thought my micron gauges were fine until I bothered to check them against one another.

Dan

[Thomasg]

Yes in ice water and my cooper box.

[fheatair]

do you have pics of what you did. I just got my AK900 and I am wanting a nonvelcro option

[jpsmith1cm]

Here's a little trick that I've come up with to protect the sensors.

Take the sensor and carefully wrap it up about the width of your palm and close the velcro around it.

Now, wrap a piece of insulation a bit longer than it is around it and wrap a mille-tie around that. Radio Shack has them around here.

do you have pics of what you did. I just got my AK900 and I am wanting a nonvelcro option

Try the link in the post quoted above yours.

They work great.

[Thomasg]

http://hvac-talk.com/vbb/showthread....1019051&page=2
Jp idea is pretty good also if you dont want to take the chance of messing your new sensors up. I did mod only because I pulled my sensor wire out of the sensor going up a ladder. I keep them in a small bag that slides down the hanger now works great.

[hvac wiz 79]

x2 on keeping them in a small bag connected to the manifold. i keep a few millie ties in there as well.

[hvac wiz 79]

i did the mod the other night & am able to use my cooper straps now ... didnt really care for the strap type probes before but thats because i was spoiled using clamp on. it works & looks great. im going to take 1 of the 2 probes that came with the ak900 & modify an old testo clamp a friend of mine threw away after the connection pins broke .... id share pics but anyone who has read this thread has seen the idea already

[jpsmith1cm]

I've got an idea or two for an interesting Digi-cool sensor mod.

I've got materials on the way right now for it.

I'll take pics as I do it for you all

[hvac wiz 79]

i did the clamp set up .. here's the pics. it came out decent i used some scrap wire from a digital temp control i had to shorten the sensor length on & the testo clamp. the part i don't like is I'm only getting 33° on it no matter how much i stir up the crushed ice/water mix compared to the 32° on my Cooper strap. how bad could that 1° mess me up or is it tolerable? its irking me

[jpsmith1cm]

I've got an idea or two for an interesting Digi-cool sensor mod.

I've got materials on the way right now for it.

I'll take pics as I do it for you all

OK, I finally got the parts ordered, the time set aside and grew the B***S to start remodeling a DRSA.

Here was the plan. Purchase a set of dual scissor clamps and some materials from Digi-key.

Chop the 4 pin connector off of the dual scissors and install individual plugs to match the original 1200 connector.

Rip the 4 pin connector out of the AK and install 2 plugs matching the 1200.



This gives me the advantage of using a single sensor if I want a single and dual sensors when I need it.

I've also got the ability to use clamps or simple probe sensors as needed or wanted for the job at hand.

[Thomasg]

Nice now you just need to drive down here and set mine that way

[Pascone10]

JP, How can you use only one sensor when needed?? OR are your referring to using the 1200?

Also Do you ever see inaccuracies with those clamps in the first pic in a high surrounding ambient?

[hvac wiz 79]

looks good. that's the other thing i like about the mod i did also i can use one sensor at a time as opposed to having the other one dangle there. you didn't take pics when you had it apart?

Sent from my HTC Sensation 4G using Tapatalk

[jpsmith1cm]

JP, How can you use only one sensor when needed?? OR are your referring to using the 1200?

Also Do you ever see inaccuracies with those clamps in the first pic in a high surrounding ambient?

I KNEW that someone was going to raise this issue.

The 1250 MUST have both sensors connected or it won't read either. The AK doesn't CARE. It can have one sensor or two. It reads them at start-up and functions accordingly. Hook up one sensor and it will work like a 1200. I can switch between SH and SC normally using the MODE key. Hook up both and it works like a dual sensor model.

I haven't had the clamps long enought to notice any inaccuracies, yet, but you can be certain that I will be watching for it and TESTING for it.

looks good. that's the other thing i like about the mod i did also i can use one sensor at a time as opposed to having the other one dangle there. you didn't take pics when you had it apart?

Sent from my HTC Sensation 4G using Tapatalk

The internal mods are pretty intensive. You have to pull the panel socket, obviously, cut and solder the new pins on.

You've also got to open up the hole for it and locate the new hole. The upper hole also requires cutting out a LOT of plastic.

Once I got into it, I decided not to mess with pictures.

[jpsmith1cm]

Nice now you just need to drive down here and set mine that way

2 hours time, less than $50 in materials from Digi-key, a Dremel and a blatant disregard for anything approaching a warranty is all ya need.

[AStudent]

I got the contact cement, 2'' aluminum sprin clamps from Harbor Freight, along with heat shrink tubing for marking one of the wires with red for the high side, and for the connections that needed to be soildered at each end of the wire. I used shring tubing instead of using electrical tape. I got the 6.5'' attenuating dubbing cable from radio shack. I got the Bernzomatic butane micro flame torch from Home Depot, it was perfect for this project. For the clamps I drilled out the center of the clamp where the temp sensor is so it could be somewhat more flush mounted instead of sticking up so high, then used the contact cement to mount in place.

I was sitting in my recliner thinking of this exact same way of doing it, then I logged on hvac talk and saw your thread...seems easy enough.

[jpsmith1cm]

JP, How can you use only one sensor when needed?? OR are your referring to using the 1200?

Also Do you ever see inaccuracies with those clamps in the first pic in a high surrounding ambient?

Figured I'd shoot a couple pix of the unit in single sensor mode.

[hvac wiz 79]

i got pissed at my clamp being inaccurate so i smashed the thing .. saved the wire tho. debating on attempting making another sensor or just buying one ... i cant get a close up image on the digi-cool clamps to see how well they make contact. how are they ? .. i suppose if i bought the set of those i could modify it to work with my ak900 & then have an extra one in case . . . . i def dont want to spring for antother cooper clamp on because i can get 2 digis for price of 1 cooper & i havent even seen that cooper around recently anyway