[ezflyr]

in reply to: Thermocouple Waterproofind #3755

Hi all,

An interesting question would be why immersion in water causes the thermocouple to stop working? Obviously, the Maxim part doesn’t provide an “isolated” input, but that shouldn’t matter in this situation. It seems that a current flow path would have to exist for the thermocouple to stop working? I’m trying to imagine another explanation to this issue? What happens if the water is isolated rather than the probe?

John

PS it seems that my kit has been delivered, but I won’t get to play with it until I return from skiing in California next weekend.

[ezflyr]

in reply to: Troubleshooting the Output #3712

Hi,

I don’t have my unit yet, but here are a few thoughts:

I thought only one relay is being installed by default, and I would have guessed that would be Relay1? Are you sure you’re connected to an actual relay? If so, keep in mind that the relay is only going to switch one side of your power source. So, for instance, the neutral connection of a 120VAC source would wire directly to the load, and the hot connection would pass through the relay, and then to the load. Is that how you have it wired?

I wouldn’t expect the output to totally turn off when your set point is below the actual value, but I would expect the characteristics of the On/Off switching to change noticibly depending on where the set point was WRT the actual input value? Do you note any change?

John

[ezflyr]

in reply to: osPID in the US? #3692

Hi fromar,

My unit was shipped on 2/27, and it still hasn’t arrived in the Boston area as of 3/13. I wouldn’t care so much about the shipping times but I’m leaving for two weeks tomorrow, and I was hoping to receive it before I left. Oh well, I’ll undoubtedly have something to play with when I get back!

John

[ezflyr]

in reply to: osPID in the US? #3690

Hi,

Ah, yes, the good old USPS!!

Thanks for the heads-up, I’ll let you know when it arrives!!

John

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