Ohaus Model CD-11 Weighing Instrument

Ohaus Model CD-11 Weighing Instrument
6/4C/225
10 December 2010
Bradfield Road, West Lindfield NSW 2070
Cancellation
Certificate of Approval No 6/4C/225
Issued by the Chief Metrologist under Regulation 60
of the
National Measurement Regulations 1999
This is to certify that the approval for use for trade granted in respect of the
Ohaus Model CD-11 Weighing Instrument
submitted by
Ohaus Corporation
19A Chapin Road
Pine Brook
NJ
07058
USA
has been cancelled in respect of new instruments as from 1 February 2011.
Signed by a person auth orised by the Chief Metrologist
to exerci se his po wers under Re gulation 60 of the
National Measurement Regulations 1999.
6/4C/225
19 November 2004
12 Lyonpark Road, North Ryde NSW 2113
Certificate of Approval
No 6/4C/225
Issued by the Chief Metrologist under Regulation 60
of the
National Measurement Regulations 1999
This is to certify that an approval for use for trade has been granted in respect of the
Ohaus Model CD-11 Weighing Instrument
submitted by
Ohaus Corporation
19A Chapin Road
Pine Brook
NJ
USA.
07058
NOTE: This Certificate relates to the suit ability of the p attern of the instrument for
use for trade only in respect of its metrological characteristics. This Certificate does
not constitute or imply any guarantee of compliance by the manufacturer or any other
person with any requirements regarding safety.
CONDITIONS OF APPROVAL
This approval becomes subject to review on 1 March 2009, and then every 5 years
thereafter.
Instruments purporting to comply with this approval shall be marked with approval
number ‘NSC 6/4C/225’ and only by persons authorised by the submittor.
..../2
6/4C/225
19 November 2004
Certificate of Approval No 6/4C/225
Page 2
It is the submittor ’s responsibility to ensure that all instrument s marked with this
approval number are constructed as described in the documentation lodged with the
National Measurement Institute (NMI) and with the relevant Certificate of Approval
and Technical Schedule. Failure to comply with this Condition may attract penalties
under Section 19B of the National MeasurementAct and may result in cancellation or
withdrawal of the approval, in accordance with document NMI P 106.
The National Measurement Institute reserves the right to examine any instrument or
component of an instrument purporting to comply with this approval.
Auxiliary devices used with this instrument shall comply with the requirement s of
General Supplementary Certificate No S1/0/A.
The values of the performance criteria (maximum number of scale intervals etc.)
applicable to the instrument shall be within the limit s specified herein and in any
approval documentation for the components where they are approved separately.
This approval shall NOT be used in conjunction with General Certificate No 6B/0.
DESCRIPTIVE ADVICE
Pattern: approved 20 February 2004
•
An Ohaus model CD-1 1 single-interval self-indicating weighing instrument of
15 kg maximum capacity. May also be known as the Champ-II series.
Variants: approved 20 February 2004
1.
Certain other CD-11 series instruments as listed in Tables 1 & 2.
2.
Certain CW-11 series instruments as listed in Tables 3 & 4. May also be known
as the Champ CQW series.
3.
Certain baseworks of this approval used with a comp atible approved indicator.
Technical Schedule No 6/4C/225 describes the p attern and variants 1 to 3.
Variants: approved 18 November 2004
4.
Any approved CH series basework used with a model CW -11 indicator.
5.
Any approved CQ series basework used with a model CD-11 indicator.
6.
Any approved CQ series basework having a stainless steel frame.
Technical Schedule No 6/4C/225 Variation No 1 describes the pattern and variants 4 to 6.
FILING ADVICE
Certificate of Approval No 6/4C/225 dated 23 July 2004 is superseded by this Certificate,
and may be destroyed. The documentation for this approval now comprises:
Certificate of Approval No 6/4C/225 dated 19 November 2004
Technical Schedule No 6/4C/225 dated 23 July 2004 (incl. Tables 1 to 4,
and Test Procedure)
Technical Schedule No 6/4C/225 Variation No 1 dated 19 November 2004
Figures 1 to 5 dated 23 July 2004
Signed by a person authorised by the Chief Metrologist
to exercise his powers under Regulation 60 of the
National Measurement Regulations 1999.
6/4C/225
23 July 2004
TECHNICAL SCHEDULE No 6/4C/225
Pattern:
Ohaus Model CD-11 Weighing Instrument
Submittor:
Ohaus Corporation
19A Chapin Road
Pine Brook
NJ 07058
1.
USA
Description of Pattern
An Ohaus model CD-1 1 single-interval self-indicating weighing instrument (T able 1
and Figure 1) with a maximum cap acity of 15 kg and a verification scale interval of
0.005 kg. These instruments are also known as the Champ-II series.
Instruments may be fitted with output socket s (output interfacing cap ability) for the
connection of peripheral and/or auxiliary devices.
1.1 Basework
The Ohaus model CH15R basework has the load receptor directly supported by a
single load cell. The load receptor has maximum nominal dimensions of 305 x 355 mm.
1.2 Load Cell
A Mettler Toledo model MT1241-30 load cell of 30 kg maximum cap acity is used.
1.3 Indicator
An Ohaus model CD-1 1 digital indicator is used (Figure 2). The indicator may be
attached directly to the base or mounted on a column; it may also be located remotely
.
The model CD-11 is also described in the document ation of approval NSC S431.
The indicator also has an additional ‘counting’ function which can be assigned to a
function key of the indicator . The additional function (other than the indications of
measured mass, i.e. gross, tare, net, totals, displayed either on the indicator or on an
auxiliary or peripheral device) is not approved for trade use.
Power supply may be either:
•
•
9 V DC supplied by an AC/DC mains adaptor or other DC power source; or
batteries.
Note:
The AC/DC mains adaptor supplied was an Ohaus model S090050D31 power
supply (output 9 V DC, 500 mA) – the submittor should be consulted regarding
the acceptability of alternative power supply unit s or other power source.
1.3.1 Zero
Zero is automatically corrected to within ±0.25e whenever the instrument comes to
rest within 0.5e of zero.
..../2
6/4C/225
23 July 2004
Technical Schedule No 6/4C/225
Page 2
The instrument has a semi-automatic zero-setting device (to set the instrument to
within ±0.25e of zero) with a nominal range of not more than 4% of the maximum
capacity of the instrument.
The instrument has an initial zero-setting device with a nominal range of not more
than 20% of the maximum capacity of the instrument.
1.3.2 Tare
A semi-automatic subtractive t aring device of up to the maximum cap acity of the
instrument may be fitted. When the taring device is in use, the gross value and tare
value may be displayed temporarily by the use of the G/N/T button.
1.3.3 Display Check
A display check is initiated whenever power is applied.
1.4 Levelling
The instrument is provided with adjustable feet and adjacent to the level indicator is
a notice advising that the instrument must be level when in use.
1.5 Sealing Provision
Provision is made for the calibration adjustment s in the Ohaus model CD-1 1 digital
indicator to be sealed by removal of a ‘CAL jumper’ within the instrument and then
sealing to prevent access within the instrument (Figure 3).
To check whether the ‘CAL jumper’ has been removed:
•
with the instrument switched on and in weighing mode, press and hold the
G/N/T button for approximately 4 seconds - MENU will appear.
•
release the G/N/T button. If ‘set up’ apears then the ‘CAL jumper ’ has been
removed; if ‘Cal’ appears then the ‘CAL jumper’ has NOT been removed.
•
Removing power from the indicator is a simple means of exiting from menus at
this stage.
Once it has been ensured that the ‘CAL jumper’ has been removed, the instrument
may be sealed by means of a screw and lead & wire seal or a destructible label
preventing access to the sealing screw (Figure 3), or by means of destructible labels
over the join in the indicator casing, at each side of the indicator .
1.6 Verification/Certification Provision
Provision is made for a verification/certification mark to be applied.
..../3
6/4C/225
23 July 2004
Technical Schedule No 6/4C/225
Page 3
1.7 Markings
Instruments carry the following markings:
Manufacturer’s mark, or name written in full
Name or mark of manufacturer’s agent
Indication of accuracy class
Pattern approval mark for the instrument
Maximum capacity
Minimum capacity
Verification scale interval
Serial number of the instrument
*
Ohaus Corporation
..............
NSC 6/4C/225
Max ............ kg *
Min ............. kg *
e = .............. kg *
..............
These markings shall also be shown near the display of the result if they are not
already located there.
In addition, instruments not greater than 100 kg capacity shall carry a notice st ating
NOT TO BE USED FOR TRADING DIRECT WITH THE PUBLIC, or similar wording.
2.
Description of Variants
2.1 Variant 1
Certain Ohaus CD-11 series instruments of specifications as listed in Tables 1 & 2.
2.2 Variant 2
Certain Ohaus CW -11 series instrument s which are similar to the p attern and
variant 1, but which use the model CW -11 indicator (Figure 4). These instruments
are also known as the Champ CQW series.
The model CW -11 indicator is similar to the model CD-1 1 but in a st ainless steel
housing and is also described in the document ation of approval NSC S431.
Specifications of these instruments are as listed in Tables 3 & 4.
Sealing Provision
Use the procedure described for the pattern to ensure that the ‘CALjumper’ has been
removed; the instrument may then be sealed by means of destructible labels as follows:
(a)
by placing a label over the joins in the housing on each side of the instrument
for instruments operated by mains power supply; or
(b)
by placing a label over at least one of the screws which hold the battery holder
within the instrument housing (Figure 5). Alternatively, a screw and lead & wire
seal may be used.
..../4
6/4C/225
23 July 2004
Technical Schedule No 6/4C/225
Page 4
2.3 Variant 3
Certain baseworks of this approval used with a comp atible approved (by
Supplementary Certificate) indicator provided the conditions set out below are met.
In this case instrument s may be known according to the basework model number
(model CH15R, etc.).
In addition to the markings specified in clause1.7 Markings, instruments are marked
with the approval number for the indicator used, together in the same location.
The approved baseworks and their limiting characteristics are given in Tables 1 & 2.
The conditions to be met are:
•
The excitation voltage used is within the range approved for the baseworks.
•
The maximum load applied to the basework (live load plus any dead load)
does not exceed the load cell maximum capacity.
•
The verification scale interval is not less than the minimum value specified.
•
The number of verification scale intervals is less than or equal to thenmax value
specified.
•
The signal voltage per verification scale interval is not less than the minimum
sensitivity value per verification scale interval for the indicator (as specified in
the approval documentation for the indicator), i.e.
Indicator Sensitivity ≤ 1000 × Ex × LC_Sens × e / E max
where Ex = Excitation from indicator (V)
LC_Sens = Load cell sensitivity (mV/V)
Emax = Load cell maximum capacity (kg)
e = verification scale interval of the instrument (kg)
Indicator Sensitivity = Minimum sensitivity value per verification
scale interval for the indicator (µV)
TEST PROCEDURE
Instruments should be tested in accordance with any relevant test s specified in the
Uniform Test Procedures.
Maximum Permissible Errors at Verification/Certification
The maximum permissible errors for increasing and decreasing loads on initial
verification/certification for loads, m, expressed in verification scale intervals, e, are:
±0.5 e for loads 0 ≤ m ≤ 500;
±1.0 e for loads 500 < m ≤ 2 000; and
±1.5 e for loads 2 000 < m ≤ 10 000.
..../5
6/4C/225
23 July 2004
Technical Schedule No 6/4C/225
Page 5
TABLE 1
Instrument/
Indicator
Model (#1)
Instrument
Model (#2)
CD-11
CD-11
CD-11
CD-11
CD-11
CD-11
CD-11
CH15R11A
CH15R
CH30R11A
CH30R
CH60R11A
CH60R
CH60L11A
CH60L
CH100R11A
CH100R
CH150R11A
CH150R
CH300R11A
CH300R
420 x 550
(#1)
(#2)
(#3)
150 kg
Basework
Model (#3)
Maximum
Capacity
E
11
Maximum
Platform Size
mm x mm
15 kg
30 kg
60 kg
60 kg
100 kg
150 kg
300 kg
Table 2
Details
305 x 355
305 x 355
305 x 355
400 x 500
400 x 500
420 x 550
420 x 550
CH300R
A
B
C
C
D
E
F
The indicator model number by which the instrument may also be known.
The instrument model (item) number by which the instrument is typically known
when used with the corresponding model indicator.
Instruments may also be known according to basework model number , typically
when used with alternative approved indicators. See variant 3.
TABLE 2
Table 2 details (see Table 1)
A
B
C
DE
E
FF
Maximum capacity
kg
15
30
60
100
150
300300
Typical verification scale
interval
kg
0.005
0.01
0.02
0.05
0.05
0.10.1
3000
3000
3000
3000
3000
3000000
-50
-100
-150
-300
-500
Maximum number of verification
scale intervals
nmax
Load cell model (suf fix)
Mettler Toledo MT1241 series -30
Mettler Toledo MT1260 series
Load cell maximum cap acity
(Emax)
kg
30
50
100
150
300
500500
Number of load cells
1
1
1
11
1
1
Minimum value of verification
scale interval for basework
(vmin of load cell)
kg
0.005
0.0083
0.0167
0.025
0.05
0.083
Load cell sensitivity
at Emax
2
2
2
2
2
22
410
410
410
410
410
410
20
20
20
20
20
20
2
4
2
4
2
4
2
4
2
4
2
4
Input impedance
Excitation volt age
(maximum)
mV/V
ohm
V
Cable length (±0.1m) (#3) m
Number of leads (plus shield)
4
(#3)
2
4
The load cell cable length supplied with the basework shall not be shortened.
..../6
6/4C/225
23 July 2004
Technical Schedule No 6/4C/225
Page 6
TABLE 3
Instrument/
Indicator
Model (#1)
Instrument
Model (#2)
Basework
Model (#3)
Maximum
Capacity
CW-11
CW-11
CW-11
CW-11
CW-11
CQ10R11WA
CQ25R11WA
CQ50L11WA
CQ100L11WA
CQ250XL11WA
CQ10R
CQ25R
CQ50L
CQ100L
CQ250XL
15 kg
30 kg
60 kg
150 kg
250 kg
(#1)
(#2)
(#3)
Maximum
Platform Size
300
300
450
450
600
x
x
x
x
x
300
300
450
450
600
Table 2
Details
G
H
I
J
K
The indicator model number by which the instrument may also be known.
The instrument model (item) number by which the instrument is typically known
when used with the corresponding model indicator.
Instruments may also be known according to basework model number, typically
when used with alternative approved indicators. See variant 3.
TABLE 4
Table 4 details (see Table 3)
G
H
I
J
K
Maximum capacity
kg
15
30
60
150
250
Typical verification scale
interval
kg
0.005
0.01
0.02
0.05
0.05
3000
3000
3000
3000
2500
-30
-50
-100
-200
30
50
100
200
300
Number of load cells
1
1
1
1
1
Minimum value of verification
scale interval for basework
(vmin of load cell)
kg
0.005
0.0083
0.0167
0.033
0.05
Load cell sensitivity
at Emax
mV/V
2
2
2
2
2
Input impedance
ohm
387
387
387
387
387
20
20
20
20
20
Cable length (±0.1m) (#3) m
2
2
2
2
2
Number of leads (plus shield)
4
4
4
4
4
Maximum number of verification
scale intervals
nmax
Load cell model (suf fix)
Mettler Toledo SSP1241 series
Mettler Toledo SSP1260 series
Load cell maximum capacity
(Emax)
kg
Excitation volt age
(maximum)
(#3)
V
The load cell cable length supplied with the basework shall not be shortened.
-300
6/4C/225
19 November 2004
TECHNICAL SCHEDULE No 6/4C/225
VARIATION No 1
Pattern:
Ohaus Model CD-11 Weighing Instrument
Submittor:
Ohaus Corporation
19A Chapin Road
Pine Brook
NJ 07058
1.
USA
Description of Variants
1.1 Variant 4
Any approved model of the CH series baseworks used with a model CW
-11
indicator, in which case the instrument model number has a W as the second
last digit, e.g. the model CH15R1 1A as listed in Table 1 (included in Technical
Schedule No 6/4C/225 dated 23 July 2004) becomes model CH15R1 1WA.
1.2 Variant 5
Any approved model of the CQ series baseworks used with a model CD-1
1
indicator, in which case the instrument model number has the second last digit
(W) removed, e.g. the model CQ10R1 1WA as listed in Table 3 (included in
Technical Schedule No 6/4C/225 dated 23 July 2004) becomes model CQ10R1
1A.
1.3 Variant 6
Any approved model of the CQ series baseworks but having a stainless steel frame
(rather than painted steel) in which case thebasework model number has a W added
as the last digit, e.g. the model CQ10R as listed inTable 3 becomes model CQ10RW.
NOTIFICATION OF CHANGE
In Table 3 included in Technical Schedule No 6/4C/225 dated 23 July 2004, the first
line in the heading should be amended by changing ‘T able 2’ to read ‘Table 4’.
6/4C/225
23 July 2004
FIGURE 6/4C/225 – 1
Ohaus Model CD-11 Weighing Instrument
6/4C/225
23 July 2004
FIGURE 6/4C/225 – 2
Ohaus Model CD-11 Digital Indicator
6/4C/225
23 July 2004
FIGURE 6/4C/225 – 3
Sealing screw and fixing
for wire and lead seal
Sealing of Model CD-11 Indicator
6/4C/225
23 July 2004
FIGURE 6/4C/225 – 4
Model CW-11 Indicator
6/4C/225
23 July 2004
FIGURE 6/4C/225 – 5
At least one sealing
screw to be sealed
Sealing of Model CW -11 Indicator
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