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January 2003

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Subject:
From:
"Randy Bock Sr." <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 30 Jan 2003 15:00:17 -0500
Content-Type:
text/plain
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text/plain (114 lines)
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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