Avery Berkel Technical Specification
T301
T301
OIML approved digital super-precision load cell
Description
A hermetically sealed load
bearing unit operating in
compression to produce a digital
output which is proportional to the
applied load.
Construction
100% stainless steel, natural
finish.
Capacity
30 tonne.
Maximum range of indication
50 tonnes.
Examples of Use
● Road weighbridges
● Rail weighbridges
● Tank weighing
● Hopper weighing
● Process control
Special Features
● Approved in Europe to
OIML R60 for 6000 divisions
with Vmin = 3.2 kg.
● 100% stainless steel
construction.
● Surge arresters fitted internally
to provide protection against
lightning damage
(See application note on
lightning protection).
● 6 pin hermetic waterproof
socket (Meets Specification
MIL C 26482 10-06).
● Continuous self-diagnostics.
● Communication via RS485.
● 15, 25, 50 and 200 metre
cable lengths available
(See Kits).
● Cable is attached to the cell by
plug and socket to enable
ease of installation and
service.
● Supplied ready-assembled
with gaiters and load buttons
for simple installation.
● Unique, low torque, antirotation load button design.
Specification
Environment
Resistance to Dirt & Moisture
The load cell has been designed
to exceed IP68 rating.
Electrical Disturbance
Immune to electrical disturbance
including RFI as detailed in
EN45501:1992.
Storage Temperature Range
- 30O C to + 85O C.
Operating Temperature Range
- 20O C to + 60O C.
Calibrated Temperature Range
- 10O C to + 40O C.
BerkelAvery
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T301
Avery Berkel Technical Specification
Specification
Electrical Supply (Minimum) ± 7.5v, DC
Electrical Supply (Maximum) ± 12v, DC
Communication Balanced Pair RS485, 19200 Baud
Output Update Rate 10 Readings/sec
Internal Resolution 8 x 106 Counts
Output Resolution 1.5 x 106 Counts
Non-Linearity and Hysteresis (Combined Error) ± 150ppm (Maximum)
Repeatability 80ppm
30 min Creep (OIML R60) ± 120ppm (Maximum)
30 min Zero Return (OIML R60) ± 80ppm (Maximum)
Temperature Effect on Rated Output (-10oC to + 40oC) ± 6ppm/o C (Maximum)
Temperature Effect on Zero Balance (-10oC to + 40oC)
± 15ppm/o C of Rated Span (Maximum)
Calibrated Capacity (OIML) 30 tonnes
Maximum Range of Indication 50 tonnes
Overload Rating (without affecting Performance) 225% (67.5 tonnes) Rated Capacity
Overload Rating (Ultimate) 350% (105 tonnes) Rated Capacity
Electrical Termination
Load cell fitted with 6 pin socket to MIL C 26482 10-06.
Cable: Arctic PVC, 4 core 7 x 0.20 mm plus screen. Overall diameter 6 mm.
Standard length 25 metres.
Connections
Function Load Cell Load Cell
Pin Out Cable Colour
COMM7 A RED
COMM6 B WHITE
0 V C ORANGE (screen
-ve supply D BLACK
+ve suppy E GREEN
COMM6 & COMM7 relate to pin
nos. 6 & 7 respectively on a type
75176 Differential Bus Transceiver
device.
D
C
B
Pin Out Connections.
E
F
A
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Avery Berkel Technical Specification
Applications
This transducer is designed to
operate with loads applied
through the central axis of the
cell. For high accuracy weighing
applications the load cell is
protected from side forces and/or
off centre loads by mounting it as
a double pendle (strut) unit.
Tie bars or bumper stops will be
required to restrict horizontal
movement of the load platform.
The cell can be mounted either
way up.
Typical Vehicle Weighing
Applications
In the weighbridge application
shown below, the strut unit
provides the cell with the optimum
loading conditions needed for
high accuracy vehicle weighing.
Normal Load
Side Force
T301
Off-Centre Load
Illustration shows a typical Avery Berkel load cell concrete weighbridge.
Load Cell Strut Assembly
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T301
Avery Berkel Technical Specification
Kits
1.
Standard arctic PVC cable
including load cell connector in
lengths of 15, 25, 50 or 200
metres.
2.
Harsh environment polyurethane
cable including load cell
connector in lengths of 25, 50 or
200 metres.
3.
Galvanised plug and cable
protector box (mounts on the load
cell). Provided with 20 mm x
1.5 mm female thread for
attachment of standard flexible
conduit, e.g. Adaptoflex flexible
steel conduit, RS part no. 2275284, and associated fittings.
Dimensions
184
92
Ø 120
15
236
30°
15
Ø 76
Ø 100
Clearance required
to remove plug
15
Dimensions of
optional galvanised
plug and cable
protector box
Clearance required
to remove plug and
cover
55
85
30°
55
87
32
Ø 65 20
All dimensions in millimetres
This brochure contains a general guide only of the product and shall not form part of any contract unless specifically agreed by Avery Berkel in writing in each case on the Order Acknowledgement.
Your local distributor:
The specification of the products described herein may vary from time to time and may be altered without notice.
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T301/11.99/Issue 4
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