[time-nuts] Replacement fan in SR 620

[Magnus Danielson]

Hi Jarl,

On 01/02/14 21:47, Jarl Risum wrote:
> Hi Magnus,
>
> I recently sent the following comment to the Time-Nuts list, but it do
> not turn up. So I decided to send a copy directly to you:

Thanks

> "Magnus,
>
> In my SR620 the fan is a Delta DBF0624H which unfortunately seems no
> longer to be in production.
>
> It is a 60x60x25 mm fan, 24V /0.11A.
>
> As discussed previously on the list, the temperature controlled cooling
> of the SR620 is marginal.
>
> I have to remove the counter from it's cramped quarters on the shelf and
> place it on the table whenever I try to make critical measurements over
> a long time span. My room temperature is around 20 deg C.
>
> If you cannot get rid of the noise by oiling the original fan and you
> have to replace it I suggest you - just as a safety measure - to monitor
> the temperature of the right side panel of the SR 620 after replacing
> the fan and at the same time compare with the temperature of another,
> working and healthy, SR620 in similar surroundings.
> .
> If you find a generally available, silent replacement fan with
> sufficient cooling capacity, please let us know.
>
> Cheers,
> Jarl"

OK, I'm considering the EBM-Papst 614NGN, which is 60x60x25 24V radial 
fan. Your measures helped me to go straight to the search for a fan.

Cheers,
Magnus