RAMSEY BELT SCALE SYSTEMS
MASS MEASUREMENT ON CONVEYOR BELTS
High Accuracy Conveyor Scales
SERIES 14
SERIES 17
SERIES 20
Super Precision Weighing 0.125%
High Accuracy Weighing 0.25%
General Inplant Weighing 0.5%
10-14-4
10-17-4
10-20-1
The Series 14 Precision Belt
Scale System is:
The Series 17 High Accuracy
Belt Scale System:
The Series 20 inplant Belt
Scale System:
• Specifically designed for high accuracy
or basis-of-payment applications
requiring certification by governmental
and/or regulatory agencies.
• The Series 17 Belt Scale System is
designed for plant and process
operations which either run at higher
rates of speed or require better-than
normal belt scale accuracy.
• Is designed for general in-plant
conveyor-belt weighing applications in
the most demanding industrial
environments.
• The Series 14 Precision Belt Scale
System incorporates our 10-14 low
deflection, full floating unitized weigh
bridge and our 61-12 Speed Sensor.
Both are widely proven on hundreds of
precision belt weighing applications.
• Available in 2, 3, 4 (as shown), and 6
metre weigh spans.
Certification
Thermo Ramsey’s Series 14 Precision Belt
Scale System is the most widely certified
electronic belt scale in the world, having
received its certificate of conformance as
issued under the National Conference on
Weights and Measures as well as
certification against SABS, OIML and EEC
Class 1 standards.
• Combines the time-proven reliability
of our 10-17 Weighbridge and 60-12
Speed Sensor with the power and
versatility of the advanced electronics
in the Micro-Tech 9000 Series
Integrators.
• The Series 17 is available in either 2,
4 or 6 idler versions.
• The longer weighbridge means more
scaleborne time and minimizes
alignment errors which translates into
better accuracy.
• The Series 20 combines the proven
reliability of Ramsey’s 10-20
Weighbridge and 60-12 Speed Sensor
with the power and versatility of the
advanced electronics of the MicroTech 9000 Series Integrators.
Easy Installation
Easy to install, indoors or out, on fixed
or portable conveyors, the Series 20’s
rugged construction is designed for
harsh applications including:
• Crushing plants
• Chemical plants
• Asphalt plants
• Mines
• Cement mills
• Coal preparation plants
• Paper mills
• Gypsum plants
• Sand and gravel operations
• Coal-fired power plants
• Ore benefication processes
• Rail loadout
10-17-2
Operational Parameters
Operational Parameters
Operational Parameters
0.125%
> 20tph
< 12 000tph
up to 6m/s
certifiable
600 to 2 200mm
-350 mm lump size
9m/11m space
weigh idlers required
0.25%
> 20tph
< 5 000tph
up to 4m/s
non-certifiable
600 to 2 200mm
-350 mm
7m/11m space
w/idlers opt
0.5%
> 15tph
< 1 000tph
up to 2m/s
non-certifiable
450 to 1 500mm
-150 mm
5m space
w/idlers req
Cost Effective Weighing Solutions
SERIES 30
IDEA SERIES
WEIGH CLASS IDLERS
Cost Effective Weighing 2%
Versatile Weighing 1%
Improve Accuracy
10-30-1
The Series 30 Belt Scale
System:
• Is ideally suited for applications in
processes involving either non-critical
or lower value, materials.
• It provides basic rate and totalization
functions which can be used for process
control and/or production output
monitoring.
• It is specifically designed for operations
where economy and ease of installation
are important considerations.
• The Series 30 combines the proven
reliability of Ramsey’s 10-30
Weighbridge and 60-12 Speed Sensor
with the advanced electronics of the
new Mini 11-101F Integrator.
Dual Load Cell Model
450mm to 2200mm
The IDEA Belt Scale System:
Weigh Class Idlers:
• Continues Ramsey’s longstanding
tradition of providing high quality,
reliable and innovative weighing
products to the process industries.
• Modern conveyor scales are capable
of amazing accuracy, even under the
most severe operating conditions. As
with most things however, overall
performance is dictated by the weakest
link in the system, and experience
shows that this is most often due to the
use of inferior idlers.
• Its patented design is the result of
Ramsey’s experience in thousands of
belt scale applications around the world.
• The IDEA scale is specifically designed
for operations where economy and ease
of installation are important
considerations. It is ideally suited for
applications in processes involving
either non-critical or lower value materials. It provides basic rate and totalization
functions which can be used for control
and/or production output monitoring.
• Even relatively small misalignments in
the idler frame or imbalance of a roll
can introduce unwanted forces and
vibration, irrespective of how carefully
they are installed and aligned. it is
therefore highly recommended that all
conveyor scales be fitted with good
quality idler frames and rolls.
• Thermo Ramsey manufacture and
supply idlers and rolls that comply with
the best international specifications,
for all conveyor scale applications.
These units will not only provide you
with the best possibly weighing
accuracy, but will last for an extended
period of time.
Single Load Cell Model
Operational Parameters
Operational Parameters
2%
> 5tph
< 350tph
up to 1.5m/s
non-certifiable
450 to 900mm
-150 mm
3m space
w/idlers/opt
1%
> 2tph
< 500tph
up to 1.5m/s
non-certifiable
450 to 1 200mm
-150 mm
3m space
w/idlers/opt
• Ideally a scale requires 3 idlers before,
3 idlers after and 1, 2, 4 or 6 scale
mounted idlers depending on scale type
chosen.
For example, a 10-14-4 system would
require 10 weigh class idler sets, 3
lead-in, 3 lead-out and 4 mounted on
the weigh frame itself.
Accessories
MICRO-TECH 9000
MINI 11-101
60-12
Super Precision Integrator
Premium Integrator
Belt Speed Sensors & Drive Units
Models 9001, 9101, 9201
Ramsey’s Micro-Tech 9000
Series:
• Signifies a new approach to scale
instrumentation, giving the user more
flexibility and vastly increased upgrade
capabilities.
• Each electronics model in the series is
designed for a specific weighing
application: belt scales, weighbelt
feeders, impact weighing systems,
static weighing systems, batch weighing
systems or loss of weight systems.
• Because the Micro-Tech 9000 Series
uses a common platform, the user needs
to only become familiar with one basic
interface.
Model 11-101F
The Mini 11-101 Integrator:
• Is a simple cost effective micro
processor based integrator. It is easy
to operate and has a simple
straightforward calibration procedure.
• The Mini provides basic information on
rate and total and also has indicating
LED’s for Ready, Alarm Fail, Span Cal,
Zero Cal and Run.
• The Mini comes standard with a 4-20
mA output and has a optional serial
output for connection to remote
devices.
• IP67 (NEMA 4x) field mount enclosure.
Model 60-12 CSA
The 60-12CSA Belt Speed
Sensor and Drive Unit:
• Is the most reliable and accurate
speed-sensing device ever developed
for belt scale applications.
• Sensing belt motion on the clean
underside of the belt, assures an
accurate belt speed readout close to
the conveyor scale to overcome belt
stretch or pulley slip and correctly
match speed with load.
• The drive wheel is positively loaded
against the belt ensuring non-slip
contact at all times.
• Rugged machined housing suitable for
harsh industrial applications.
• The extraordinary communication
capabilities of the Micro-Tech 9000
Series allows connection to intelligent
peripheral equipment such as computers,
programmable logic controllers, printers or
network systems. The inputs and outputs
can be used to drive relays, motor
starters, lights, switches or accept inputs
from magnetic card readers, micro
switches, flow/no flow switches or pushbuttons.
• A.C. Pulse generator - no brushes to
adjust or replace
• 30 to 150 rpm 60-12C
5 to 30 rpm 60-12F
<5rpm = 60-12ENC
• IP67 (NEMA 4x) field mount enclosure.
• Available in panel mount.
Communications Specifications:
- Standard Serial Interface: RS-232C
provides support for modem; RS-485,
2- and 4-wire multi-drop
- Communication Protocols: Modbus RTU,
Allen Bradley DF-1, Siemens Profibus
- Ethernet: Ethernet/IP and Modbus/TCP
- Built-in USB Port: Configuration and data
storage
•
Panel Mount
Model 60-12 C
Please note that accuracies quoted are based on factory approved installations
Calibration Methods
STATIC WEIGHTS
ROLLER CHAIN
RCAL
(Standard with all Integrators)
Roll-Over
Roller Chain in Trough
Assized Static
Mass Pieces
Static Weight:
Calculation:
Max tph
= Kg/m
3.6 x Belt Speed
• Static Weights should be +/-60% of max
kg/m x weigh span.
e.g. for the following application:
Belt Capacity: 900 tph
Belt Speed: 2.5 m/s
Roller Chains:
Electronic Weight Simulation:
• Roller chain should be +/-60% of max
kg/m.
Comes standard with all Ramsey
Integrators
• Chain would typically extend to total
length of weigh area:
(weigh span + lead in/lead out)
ie. for 10-14-4 = 9m.
Factory set up to give +/- 75% of max
load
Use the same method of calculation as
in Static Weights, then in the example
given:
900
= 100kg/m
3.6 x 2.5
60% of this figure is:
100 x 0.6 = 60 kg/m
x 4m (10-14-4) = 240kg
Your choice is:
12 x 20 kg weights = 240kg
or
2 x 120 kg roll over weights
Chain required 60kg/m x 9m = 540kg.
• Storage Devices.
Troughs
Reels
Motorised (Winch)
Hand Operated winch
LC Size x # Cells
1
X
2 x LC Sensitivity (v/v)
(2 x Rx / z) + 1
Formula:
Where: LC = Load Cell
z = Input Impedance
Rx = simulated Rcal in Ohms
# = Number of Load Cells
eg. for the following application:
500kg Load Cell
v/v = 0.003
Rx = 47 000 OHMS
z = 350 OHMS
• Installation
Note: for 4 load cells
• Static Weight Operation:
Automated
Air / Electric
Manual
z=
350 OHMS
4 Cells
= 87.5
We get:
• Simulates the actual weight applied to
the frame in normal operation.
500kg x 4
2 x 0.003 X
1
2 x 47 000 + 1
87.5
= 309.995Kg
Belt Conveyor Scale Handbook
The Conveyor Handbook is the industry standard guide. Discussing the
selection of a belt scale, and what is best for any given situation, taking
into consideration all of the following:
•
•
•
•
•
Handbook
Intended use
Accuracy requirements
Belt scale design
Conveyor Design
Calibration
The handbook is available on request from Thermo.
Conveyor Data Sheet
Please Copy and Complete for Each Application
Fax to: +61(0)8 8234-3772
J (Shaft Dia)
I
C
H
F
A
Toe In
G
B
K
RETURN BELT
Toe Out
D
E
Customer:
Tel:
Fax:
Value
DIMENSIONAL DATA (all in mm)
Units:
A
stringer centres
Tag #
B
belt width
Accuracy Req %
C
roll length
Material
D
inside stringer
Particle Size
(mm)
E
outside stringer
Bulk Density
(kg/m 3)
(tph)
F
stringer to top roll
Max Feedrate
(tph)
G
top stringer to return belt
Nom Feedrate
(m/s)
H
Troughing Angle 20°
35°
Belt Speed
178
(°)
I
Roll Dia
127
152
Conv Incline
Shaft Dia
25
30
40
J
Idler Type (SABS 13/13)
Toe In
Toe Out
(mm)
K
Idler Spacing
24VDC
220vac
(m)
Power
Conveyor Length
Cable Entry - Viewed in direction of belt travel (looking towards the head pulley) should
electronics be mounted on the left or right hand side:
LHS
Comments:
CALIBRATION
METHOD
Electronic
Weights
Chain
Bulk Material
Approved By:
Other
Other
Other
Other
110vac
RHS
EQUIPMENT SELECTION
Weigh Frame
10-14 10-17 10-20
Integrator
9101
9201 11-101
Speed Sensor
60-12
CSA
F
Weigh Class Idlers - Quantity required:
Date:
Sales Engineer:
10-30
F/P
C
Order Number:
IDEA
ENC
IDLERS
PROXY
Date:
Thermo Scientific Job number:
Physical Address: Adelaide: 18 Butler Boulevard, Burbridge Business Park
Brisbane: Unit 2, 5 Ross Street, Newstead, QLD, 4006 l Perth: 21 Beringarra Avenue, Malaga, Western Australia 6090
TEL: +61(0)414 775-072 l FAX: +61(0)8 8234-3772 l www.thermoscientific.com/bulkweighing
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Part of Thermo Fisher Scientific