The following is the text of ASME Section V , Article 7
T-762 Lifting Power of Yokes
(a) Prior to use, the magnetizing power of electromagnetic
yokes shall have been checked within the past year.
The magnetizing power of permanent magnetic yokes shall
be checked daily prior to use. The magnetizing power of
all yokes shall be checked whenever the yoke has been
damaged or repaired.
(a) Prior to use, the magnetizing power of electromagnetic
yokes shall have been checked within the past year.
The magnetizing power of permanent magnetic yokes shall
be checked daily prior to use. The magnetizing power of
all yokes shall be checked whenever the yoke has been
damaged or repaired.
(b) Each alternating current electromagnetic yoke shall
have a lifting power of at least 10 lb (4.5 kg) at the maximum
pole spacing that will be used.
have a lifting power of at least 10 lb (4.5 kg) at the maximum
pole spacing that will be used.
(c) Each direct current or permanent magnetic yoke
shall have a lifting power of at least 40 lb (18 kg) at the
maximum pole spacing that will be used.
shall have a lifting power of at least 40 lb (18 kg) at the
maximum pole spacing that will be used.
(d) Each weight shall be weighed with a scale from a
reputable manufacturer and stenciled with the applicable
nominal weight prior to first use. A weight need only be
verified again if damaged in a manner that could have
caused potential loss of material.
reputable manufacturer and stenciled with the applicable
nominal weight prior to first use. A weight need only be
verified again if damaged in a manner that could have
caused potential loss of material.
Hence, No need for a third party certificate for the calibration and it OK if it has the manufactures certificate showing the weight lifting capacity and other test results
arun
On Mon, Apr 19, 2010 at 12:35 PM, Nishad AK <nishadamk@gmail.com> wrote:
Good day,I have a query regarding the calibartion of MPI yoke both Electomagnetic & permanent magnetic type.Does that should hold a Valid calibration certificate by the Third party calibration body or is that ok it has the manufactures certificate showing the weight lifting capacity and other test results.
--
Thanks and Regards
Nishad AK--
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