70% seems a bit high. I also worked in a facility similar to yours and we
had to stay 62% tops.  We also used a tent  to keep a specific area 30% or
less for optics.

Beep Beep


----- Original Message -----
From: Lee Whiteman <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, October 02, 2002 4:55 PM
Subject: Re: [TN] Temp Humidity Control - Do you?


> Henry,
>
> Based my prior life of building things that went beep in space...
>
> 1. We controlled and tracked temperature and humidity in our shops. We
first
> used chart recorders to track temperature and relative humidity (In an old
> facility). When we found that the system required correction, a call to
our
> facilities organization was made to correct the situation. We generally
were
> a 2 shift operation, but portions of the shop went 24-7. Later, we went to
a
> closed loop HVAC System to track and control the environment (In a new
> facility).
>
> 2. Temperature was controlled between 70F and 85F.
>
> 3. Relative Humidity was controlled between 30% and 75%. Depending upon
the
> area, humidifiers and steam generators within the HVAC were used to
increase
> the humidity when the air was too dry.
>
> Hope this helps.
>
> Good Luck.
>
> Lee Whiteman
> Senior Manufacturing Engineer
> ACI
> E-Mail: [log in to unmask]
> Ph: (610) 362-1200 x208
> Fax: (610) 362-1290
>
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