18"x24". The tech was having trouble with his equipment, which accounts for
some of the time.
-----Original Message-----
From: Randy Bock Sr. [SMTP:[log in to unmask]]
Sent: Thursday, January 30, 2003 3:00 PM
To: TechNet E-Mail Forum.; Mark Hargreaves
Subject: Re: [TN] Calibration/Verification of granite-surface
block
4 hours. What size is the plate ??
----- Original Message -----
From: "Mark Hargreaves" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, January 30, 2003 2:34 PM
Subject: Re: [TN] Calibration/Verification of granite-surface block
> Calibration company came in to do it. They used a "leveling
system" which
> arrived in 3 large equipment cases. Took them more than 4 hrs. as
I
recall.
>
> The original certificate of accuracy indicates that the
manufacturer
> calibrated the granite headstone (surface plate) using a "Watts
> Auto-Collimator".
>
> Mark
>
> -----Original Message-----
> From: Franklin D Asbell
[SMTP:[log in to unmask]]
> Sent: Thursday, January 30, 2003 2:19 PM
> To: TechNet E-Mail Forum.; Mark Hargreaves
> Subject: Re: [TN] Calibration/Verification of
granite-surface
> block
>
> We'll be using this one for the same purpose, do you
calibrate
> in-house? If
> so, what do you use to verify it...thanks...
>
> Franklin
>
>
> ----- Original Message -----
> From: "Mark Hargreaves" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Thursday, January 30, 2003 10:31 AM
> Subject: Re: [TN] Calibration/Verification of
granite-surface
block
>
>
> > Hi Franklin,
> > Our granite surface plate is used strictly for warp &
twist
> measurement of
> > pcb's (very light use). It's on our recall list. The
calibration
> is
> rather
> > expensive. I was able to move from yearly cal to 3 year
cal by
> downgrading
> > the plate from "A" (inspection grade) to "B" (shop
grade, I
> believe) which
> > is still well within our accuracy requirements.
> >
> > Regards,
> > Mark Hargreaves
> >
> > -----Original Message-----
> > From: Franklin D Asbell
> [SMTP:[log in to unmask]]
> > Sent: Thursday, January 30, 2003 10:57 AM
> > To: [log in to unmask]
> > Subject: [TN] Calibration/Verification of
> granite-surface
> > block
> >
> > Can anyone describe to me the method of
> calibrating/verifying a
> > surface
> > block???
> >
> > Also, in regards to calibration recall, would
this need
to
> be on a
> > recall
> > list or would it be verify it once in it's
lifetime,
what
> would be
> a
> > cause
> > of initial calibration being voided...
> >
> > Thanks,
> >
> > Franklin D Asbell
>
>
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