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Ramsey Series 14 Precision Belt Scale System
Formerly Thermo Ramsey
Product Specications
Ramsey Series 14
Precision Belt Scale System
Extremely accurate, certied conveyor
weighing of bulkmaterials
The Ramsey Series 14 Precision Belt
Scale System from Thermo Electron
Corporation is specically designed
for high-accuracy or basis-of-payment
applications requiring certication by
government and regulatory agencies.
The Ramsey Series 14 incorporates the
Ramsey 10-14 low-deection, full-oating
unitized weighbridge and the Ramsey
61-12C Belt Speed Sensor. Both are
well-proven on hundreds of precision
belt weighing installations.
It also utilizes the Ramsey Micro-Tech
2301 or Ramsey Micro-Tech 3301 Electronic
Integrator and the Ramsey 2301-D Load Cell
Exciter/Digitizer, which are the products of
50 years of design and application experience
with high-accuracy belt scales.
Applications
The Ramsey Series 14 Precision Belt Scale
System represents the world standard of
accuracy and performance for loadout,
inventory monitoring and fee-holder type
applications requiring certication.
The Ramsey Series 14 Precision Belt Scale
System is specically designed for high
accuracy or basis-of-payment applications
requiring certication by government
and regulatory agencies. It is extremely
accurate to within 0.125% and is the most
widely certied belt scale in the world.
The Ramsey Series 14 lets you monitor
production output and inventory, or regulate
product loadout, while providing vital
information for the effective management
and efcient operation of your business.
Analyze Detect Measure Control
TM Certication
As the most widely certied electronic belt scale in the world, the
Ramsey Series 14 has received its Certicate of Conformance in the
United States as issued under the National Type Evaluation Program
(NTEP) of the National Conference on Weights and Measures.
Outside of the US, it is certied by OIML and EEC Class I standards.
System Components
Thermos Ramsey Series 14 Precision Belt Scale System has four
major components: integrator, weighbridge, belt speed sensor and
load cell digitizer. For more information about the Micro-Tech series
of electronic integrators, please refer to catalog PI8011.0703.
The Weighbridge
Three or four idler suspension-type Ramsey 10-14 weighbridges
feature full-oating unitized assemblies with no pivots and no
moving parts.
All Ramsey weighbridges from Thermo are constructed of
structural steel tubing and are factory pre-assembled with checkrods
to facilitate fast and easy eld installation.
Only eight bolts are required to mount the unit to conveyor
stringers. Four environmentally-sealed precision strain gauge load
cell assemblies are applied in tension to support the weighbridge.
The Belt Speed Sensor
Thermos Ramsey 61-12C Digital Belt Speed Sensor is the most
reliable and accurate speed-sensing device ever developed for belt
scale service. Direct-coupling the sensor to the conveyor tail pulley,
snubbing roll, or a large diameter return roller ensures an accurate
belt-travel readout. No wheels ride on the belt, which eliminates
problems related to material build-up and slippage.
Features & Benets
The Exciter/Digitizer
The Ramsey 2301-D Load Cell Exciter/Digitizer serves as an interface
from the Ramsey 10-14 Weighbridge to the Ramsey Micro-Tech
integrator. The unit powers the load cells and converts the analog
output signals from the strain gauge load cells to an accurate,
stable digital output, which provides extraordinary temperature
stability. And because the output signal is digitized at the load cell,
line loss is virtually eliminated and signal integrity is maintained.
This unique feature is particularly important in applications where
the integrator is located up to 1,219 m (4,000 ft) from the carriage.
Weighbridge Advantages
Rigid structural steel tubing construction with checkrods maintains
positive alignment
No moving or wearing parts lead to a longer life span
No adjustments needed
Factory pre-assembled and easily installed
Four strain gauge load cells applied in tension
Full-oating, pivotless weigh platform
Belt Speed Sensor Advantages
Rugged, cast-aluminum housing suitable for outdoor installations
A.C. pulse generator means no brushes to adjust or replace
Exciter/Digitizer Advantages
Housed in a NEMA 4 or 9 steel enclosure
No adjustments or calibration required
Digital accuracy
Extraordinary temperature stability
Performance Guarantee
On factory-approved installations, we warrant that the Ramsey
Series 14 Precision Belt Scale System will weigh and totalize to a
value within ±0.125% of the test load at ow rates between 25%
and 100% of the scale systems calibrated capacity when calibrated
against an actual weighed material test. Furthermore, we warrant
that the scale system will repeat to within 0.1% of consecutively
run, simulated calibration tests.
Ramsey 10-14 Weighbridge
Belt Speed Sensor
Load Cell Exciter/Digitizer BELT
LENGTH (mm)
WIDTH
A
B
C
D
E
F
457 mm
540
686
749
591
191
1.43 x 25.4
508 mm
591
737
800
641
191
1.43 x 25.4
610 mm
692
838
902
743
191
1.43 x 25.4
762 mm
845
991
1054
895
191
1.43 x 25.4
914 mm
743
1143
1207
1048
191
1.43 x 25.4
1067 mm
1149
1295
1359
1200
254
2.06 x 25.4
1219 mm
1302
1448
1511
1353
254
2.06 x 25.4
1372 mm
1454
1600
1664
1505
254
2.06 x 25.4
1524 mm
1607
1753
1816
1657
254
2.06 x 25.4
1829 mm
1911
2057
2121
1962
254
2.06 x 25.4
2134 mm
2216
2362
2426
2267
254
2.06 x 25.4
BELT
LENGTH (in)
WIDTH
A
B
C
D
E
F
18 in
21.25
27
29.50
23.25
7.5
0.56 x 1
20 in
23.25
29
31.50
25.25
7.5
0.56 x 1
24 in
27.25
33
35.50
29.25
7.5
0.56 x 1
30 in
33.25
39
41.50
35.25
7.5
0.56 x 1
36 in
39.25
45
47.50
41.25
7.5
0.56 x 1
42 in
45.25
51
53.50
47.25
10.0
0.81 x 1
48 in
51.25
57
59.50
53.25
10.0
0.81 x 1
54 in
57.25
63
65.50
59.25
10.0
0.81 x 1
60 in
63.25
69
71.50
65.25
10.0
0.81 x 1
72 in
75.25
81
83.50
77.25
10.0
0.81 x 1
84 in
87.25
93
95.50
89.25
10.0
0.81 x 1
Ramsey Series 14 Precision Belt Scale System
IDLER
LENGTH (in)
SPACING
G
H
I
J
36 in
130
122
60
12
42 in
147
139
96
27
48 in
165
158
96
24
IDLER
LENGTH (mm)
SPACING
G
H
I
J
91.4 mm
330.2
309.9
152.4
30.5
106.7 mm
373.4
353.1
243.8
68.6
121.9 mm
419.1
401.3
243.8
61.0
Ramsey Series 14 Precision Belt Scale Four Idler Weighbridge Dimensions
Ramsey 61-12 Speed Sensor Dimensions
G Deckplate Cutout
H Overall Length
F Slots (8 typical)
Signal Digitizer
Belt Travel
(Ref. Longitudinal Check Rods)
Horizontal Conveyor
Incline Conveyor
I
J
E
A
B
E/2
C
D
406 mm
(16.0 in)
Minimum
Clearance
203 mm
(8.0 in)
Ramsey 2301-D Digitizer Dimensions
(8.00 in)
Power Input
155/230 VAC
Earth
Ground
203 mm
(10.00 in)
254 mm
(9.00 in)
229 mm
(10.95 in)
278 mm
(12.75 in)
324 mm
(5.25 in)
133 mm
(13.50 in)
343 mm
(4 x 0.313 in)
4 x 8 mm
(2.50 in)
64 mm
(1.69 in)
43 mm
(5.13 in)
130 mm
(0.25 in)
6 mm
(13.31 in)
338 mm
(0.375 in)
9.53 mm
ø
12.7 mm (0.5 in)
spring hole
Retaining Spring
Mechanical Stop
Shaft Rotation
(0.50 in)
13 mm
(7.00 in)
178 mm
(5.00 in)
127 mm
(2.75 in)
70 mm
Ramsey Series 14 Precision Belt Scale Variable Belt Width Dimensions
Ramsey Series 14 Precision Belt Scale Variable Idler Spacing Dimensions Ramsey 10-14 Weighbridges
Weigh Span
Three or four idler suspension; 2,743 mm (108 in) minimum weigh span
Clearance Requirements
Fits any standard conveyor; No space required above belt line
Idlers
Normally furnished by customer; Thermo can supply idlers upon request
Conveyors Sizes
457 mm to 2,134 mm (18 in to 84 in) or 400 mm to 2,000 mm (15.75 in to 78.75 in) belt widths
Weighbridge Construction
Mechanical steel tubing
Weighbridge Mounting
Eight bolts (four per support beam) to conveyor stringers
Ramsey 2301-D Load Cell Digitizer/Exciter
Digitizer Type
Continuous electronic load cell to digital signal digitizing
Enclosure
NEMA 4, 14-gauge steel
Circuit Construction
68332 32-bit microprocessor with up to 512 Kb ROM (program) and 512 Kb RAM
Power Requirements
115/230 VAC selectable, 50/60 Hz
Communication Input/Output
600, 9600, 19.2 k, 38.8 k baud RS-485;
Compatible with Ramsey Micro-Tech 2301 or Ramsey Micro-Tech 3301 Integrators
Digital Input/Output
Sockets for four OPTO-22 I/O modules
Calibration
None required
Operating Temperature
-40°C to +50°C (-40°F to +122°F)
Temperature Sensitivity
-10°C to +50°C (+14°F to +122°F):
Zero: 0.15 µV/°C (0.08 µV/°F) maximum
Span: 4.0 ppm/°C (2.22 ppm/°F) maximum
-40°C to -10°C (-40°F to +14°F):
Zero: 0.15 µV/°C (0.08 µV/°F) maximum
Span: 8.0 ppm/°C (4.44 ppm/°F) maximum
Accuracy
Within 0.044% of load cell capacity over full temperature range of -40°C to +50°C (-40°F to +122°F);
Within 0.022% of load cell capacity over full temperature range of -10°C to +50°C (+14°F to +122°F)
Linearity
Better than 0.01% of net, for inputs from 0 to 105% of full scale
Speed Input
0-2000 Hz; Compatible with Ramsey 60 Series Speed Sensors
Isolation
Load cell and speed sensor inputs are optically isolated from other circuits
Load Cells
Quantity
Four load cells in parallel
Enclosure
Environmentally-protected S type cell
Mounting
Tension
Excitation
10 VDC ±5%
Output
3 mV/V ±0.1%
Non-Linearity
< 0.03% FS
Non-Repeatability
0.1% FS
Hysteresis
< 0.02% FS
Operati