NATIONAL
-
STANDARDS
COMMISSION
WEIGHTS & MEASURES (PATTERNS OF INSTRUMENTS)
REGULATIONS
REGULATION 9
CERTIFICATE
This
is
pattern
to certify
and variont
that
an opproval
of the
has
been
by N.G. Brown & Associates
Pty
7 Albert
Street,
Richmond,
Victoria,
3121
Ltd,
Griffin and George
submitted
are suitable for
The
OF APPROVAL No 6/1/l
Minor
use
for
granted
by the
Commission that
the
Beam Balance
trade.
opproval of the pattern is subject to review on or after l/B/86.
instrumentspurporting to comply with this approval shall be marked NSC
6/l/l.
All
Relevant
drawings
ond
specificationsare lodged with
the
NO
Commission.
Signed
i’7
Executive
Director
DescriptiveAdvice
Pattern:
approved
19/l O/81
A non-self-indicatingbeam balance of
intervals.
.
approved
Variant:
With
I.
1 I81
g capacity
by
0.01
g
scale
19/10/81
1000 CM.capacityby 0.05 CM scale intervols.
Technical Schedule No b/l/l
16/l
200
dated
16/11/81
describes the
pattern
and
variant I.
NATIONAL
STANDARDS
TECHNICAL
Pattern:
Griffin
Submittor:
N.G.
and
Brown
George Minor
COMMISSION
SCHEDULE No 6/1/l
Beam Balance
and Associates
Pty
Ltd,
7 Albert Street,
Richmond,
Victoria, 3121
Descriptionof Pattern
1.
1.1
pattern
is
an ungraduoted,
non-self-indicatingequal-arm beam weighing
instrument of 200 g capacity with an assigned verification scale intervol of
The load receptorsand hangers
are not interchangeable
and
0.01
g (Figure
1).
are marked left and right.
The
Levelling
1.2
instrument
is provided with a level indicatorand three levelling feet,
two
Adjacent
to the level indicator
is a notice
advising
which are adjustable.
thot the instrumentmust be level when in US.
The
of
Marking
1.3
The nameplate
is marked
with
the
following dato:
Manufacturer’s
name
NSC approval
number
Accuracy
class
in the form:
Moximum capacity
in the form:
NSC No 6/1/l
ca
Max 200
Min 0.5
Minimum capacity in the form:
Verificationscale interval in
the form:
The
instrument
Descriptionof Variant
2.1
Variant 1
maximum capacity
of
1000
CM, and an
except
0.05 CM. The balance is unchanged
for the pattern,
with
the
for
the
markings
scale interval
below.
following exceptions:
Maximum Capacity
Minimum Capacity
VerificationScale Interval
16/l
assigned verification
Markings
2.1 .I
As
g
is also marked NOT FOR RETAIL COUNTER USE.
2.
With
e = 0.01
g
g
l/81
Max q 1000 CM
Min = 2.5 CM
e = 0.05
CM
of
TEST PROCEDURE No 6/1/l
1.
Accuracy
The maximum
permissibleerrors are:
t0.5e
zle
Requirements
for
for
loads
loads
between
between
0 and 5OOOe
5OOle
and 20 OOOe
Sensitivity
2.
A mass equal to the absolute value of the moximum permissible
error at the load
considered
, placed on the instrument
at equilibrium,loaded or unloaded, should
cause a permanentdisplacement
of the index of at least
1 mn.
This test should
be done in conjunction
with 4. below for at least zero and full lood.
Level Sensitivity
3.
instrument
is tilted
tilt should not be more than
position
the instrumentshould
When the
Load
4.
so thot
the end of the plum bob moves 2 mn, the
1 in 500,
and when zero is reset in the
tilted
satisfy
the above accuracy
requirements,
Test
Test
loads ore to be opplied
to the instrument
in not less than 5 approximotely
equal
steps
with the first equal
to the minimum capacity, increasing to maximum
capacity,
followed
by decreasing loads of not less than 5 approximately
equal
steps.
16/l
l/81
FIGURE
Griffin
16/11/81
and
George
61111
Minor
- 1
Beam
Balance