backup battery for Honeywell ST9420. How long?

[vsn]

Hi guys,

On a Honeywell ST9420, the programming is kept indefinitely in NVRAM, but the date/time is kept by a backup battery.

I'm hoping someone can tell me how long the backup battery is supposed to keep the date/time for.

Currently if power goes for 10 minutes, the date/time is ok, but if it goes for an hour or more, the date/time need resetting.

Honeywell Technical Support are unable to tell me, so I'm hoping someone here can...

Thanks in advance

 

[vsn]

I bought a new programmer from Wickes. It had been sitting on the floor for two weeks. When I powered it up, the date/time were already set correctly.

So I took the old one apart. I found that the battery is a Lithium CR2032 so the clock should be able to run without power for years.
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[45yearsagasman]

kept indefinitely in NVRAM,

Oh I do wish people would write exactly what they mean instead of using coded messages. WTF does NVRAM mean?

 

[robin7]

Non-Volatile Random Access Memory

 

[45yearsagasman]

Well why not say so in proper English? Thanks anyway. My life is now complete knowing that.

 

[vsn]

Oh I do wish people would write exactly what they mean instead of using coded messages. WTF does NVRAM mean?

Did you have something helpful to contribute or did you just want to whinge?

And what does WTF mean exactly?

 

[45yearsagasman]

Charming. Once I had deciphered your coded message I was going to offer a suggestion, but not a chance now. WTF is "what the f**k" Happy now.

 

[vsn]

Charming. Once I had deciphered your coded message I was going to offer a suggestion, but not a chance now. WTF is "what the f**k" Happy now.

You could have looked it up, it would have taken you less time. But no, you wanted to whinge.

If I was rude like you I would have told you what to do with your suggestion. But I'm nice, so I won't.

 

[45yearsagasman]

Strange that no one has come forward to help you as of now isn't it? I wonder why that is? Now, where's that ignore button?

 

[vsn]

Strange that no one has come forward to help you as of now isn't it? I wonder why that is? Now, where's that ignore button?

That's because I found the answer myself. I posted it.

You'd know it if you concentrated on reading instead of moaning.