Re: Type 184


Stephen
 

On Fri, Jul 31, 2020 at 05:48 AM, Eric wrote:


Slight frequency oscillation is NORMAL and is called out in the
calibration document. It is because the temperature variation of the
ovenized crystal. the oscillation should coincide with the oven light
cycling on and off.
I didn’t pay attention to that.

If you are warming up the 187 to calibrate something
it needs a 2 hour warm up followed by the 30 minute ON warn up. The oven
needs 2 hours to thermal soak the crystal.
Yes, I usually let it on and forget about it for 4 or 5 hours before I use it.

Zen

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