LC RANGE OF PRECISION LOAD CELLS

LC RANGE OF
PRECISION LOAD CELLS
(
cLC Load Cells, with 20 kN. 50 kN, 100 kN. and 1000 kN Dynamic Ratings.
('-.
.
Wide range of sizes from 2.5kN to 5000kN for tension and compression through zero
measurement.
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.
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.
.
.
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Fully compatible with range of Servotest Linear Actuators and Test Machines.
Compact, robust, shear-web design. .
Symmetricaloutput in tension and compression.
Strain gauged in shear bridge configuration to give a high output at low strain level.
High resistance to extraneous forces.
Fatigue rated for continuous use in dynamictesting.
200% staticoverloadcapacity.
.
No special adapters necessary for attachment to a lo(idframe or actuator piston rod.
Strain gauges protected for operation under adverse conditions.
Temperature compensated.
Cah"bratedto BS 1610 Grade A (AI to special order).
(
Introduction
The Servotest LC range of Load Cells are precision-made force transducers for tension and compression through
zero measurement. They are available in a wide range of siz~ :lTom2.5kN to 5000kN, and are fully compatible with
the standard range of Servotest Linear Actuators and Test Machines. All accessories that fit the actuator piston rod
will fit the load cell, and the load cell can be attached to an actuator or load :lTamewithout using special adapters.
Nonstandard sizes, even outside this range, can be supplied to special order.
Design
The Servotest LC Load Cell has been very care fully developed to guarantee reliability and repeatability. It is of
shear-web design, giving an inherently compact and robust structure, which can withstand a high degree of
overloading, bending, torsion, and side loading without sustaining damage or losing accuracy. The specially
designed shape ensures perfect symmetry of output in tension and compression and zero hysteresis.
Construction
The Servotest LC Load Cell is precision machined :lTomsolid alloy steel and cadmium plated for rust protection.
The shear webs are strain gauged by specialists, using matched, high accuracy alloy strain gauges, in a shear bridge
configuration incorporating temperature compensation. The gauges are electrically connected toa compact and
- robustPlessey-style
fixedplugattachedto the sideofthe loadcellbody.The gaugesand connectingwiresare
acrylic coated to protect them :lTomthe effects of oil and moisture. End plates are fitted to give additional physical
protection and these are vented to equalise the barometric pressure.
The shear bridge configuration comprises a fourarm Wheatstone bridge, which gives a high output at low strain
level. This output is of equal magnitude but opposite sign in tension and compression.
l
Rating
The Servotest LC Load cell gauges are operated at low strain level for infinite fatigue life with continuous reversal
at full dynamic load. Up to 200% of rated load can be applied for static or very low :lTequencymeasurements. Up to
250% short duration overloading can be applied without significant zero shift.
Resistance to Extraneous Forces
Although Servotest Machines and Test Systems are carefully designed to minimise extraneous forces1lateral and
torsional accelerations are inevitable in many dynamic applications. A shear web load cell is inherently rigid in all
planes and in the highly developed Servotest design gives a high resistance to such forces with insignificant cross
talk.
Option
In high sensitivity applications, where a small load cell is used with a large actuator, a shear plate can be
incorporated into the load cell assembly to protect the load cell against accidental damage;
Designation
The Servotest LC range of Load Cells are individually designated by the compatible
actuator type number and the load cell dynamic rating, viz.
Load cell
To Fit 80mm Piston Rod Diameter
500kN Dynamic
l
- -
LC 080 500
I
I
I
I
I
I
LOAD CELL DIMENSIONS
(
xt. thread E.
, I
L_-I--J
B
J
LI!
l-
A
.,
PleSSey 6 way
connedor.
/
:m
,
..
.
r+-"~
:" i"
.
r
I'
-
-- - - ,- -- -. -' - -..,
17-
410
c.
-
.
-
080
- sa
to 200
LC- 100- 100
to 500
LC - 150 - 300
to i 200'
LC 200 - 750'
to 2500'
LC 250 1000'
to 50'0'0
-
~.
(
~
F thread.
G Pitch circle dia.
.
(mm
A
Type
of
Load Cell
. .
Le - 0'32- 2.5
91
to 20
LC 040-5
96
to. 20
LC- 050- 5
100
to 50
LC- 0'65- 10
121
to 100
LC
N hotes.
-
B
C
0
E
F
G
N
Approx.
Load
Cell
Mass
. (kg)
: M30
.X2
' M36
45
.25
50
30
102 . X2.
50
30'
115
60
30'
135
141.5
60'
40
160
200
85
50
250
300
130
75
300
380.
210'
100
400'
660
400
180'
700'
101
M48
X2
M60
X2
M72
X2
M90
X2
Ml40
X2
Mi9a
X3
M280
X4
M6
81
S
2:5
M6
81
8
3.0'.
MB
98
. 8
4.2
M8
118
8
6.8
M12
138
12
13.8
M16
210'
12
45
M20
255
16
100
26
340
24
195
9
600
24
90'0
'
SPECIFICATION
(
\
c.
Calibration:
BS 1610 Grade A (AI to special order)
Linearity :t 1% (:t 0.5% to special order)
Temperature zero drift
Less than 0.005% per °c
Calibration change with temperature:
Less than 0.005% per °C
Compensated temperature range:
-10°C to +40oC (greater range to special order)
Hysteresis:
Less than 0.03%
Sensitivity:
0.8mVN at rated load
Maximum supply voltage:
15V
Bridge resistance:
240 ohms
Fatigue life at full toad:
Infinite
Static overload:
200%
Short duration overload:
250%
Repeatability:
:to.05%
RESISTANCE TO EXTRANEOUS FORCES
P
LC.
LC.
LC.
lC.
LC.
LC.
. LC.
LC.
LCLClC.
LC.
l
MIl. 5
040. 2a
050. 5
050. 50
Sz
. O;8-:'
';5
.
lC. 032. 2.5
LC.
LC.
LCLC.
s,
M
T
SideSid
250%
Torsi9nat 'gei1dfng
Overload' Moment
M6:me<1t
FO(I:e. Force
capaCity,
CaPacity capacirv
CapacitY
'll'!lItl'
. (Nij.!
ikf'f}
lI~m!' 1 IN!.IIt "f. eapacftv.
Typ&
of
Load Call
:
065.10
065. 100
138U
- ~O
080. 200
100. tOO
100- 500
150.300
150.1200
200 .750 !
200. 2500 .
260.1000
250- 5000
n.2
9a
12~5
50
12.5
125 i
310
25:
250;
120
500
250
1200
750
3000
1800
6200
2500
12000
4&
ISO
720190
lZOO
38et
3800 , 1900
IiHD
1300
5100
10000
2800
5700
12000
23000
15000 I 7900
43000
84000
:
I
69"000
:15000
!
5
2.5,
10
2.8
20
29
90
8".5
8.3
26
62
200
32
110
130
liZ
501l
210
340
1150
180
I
GOO
740
:
2300-
210000
140000
170000
B7oo0
290
800
560000
290000
990
2600
430000
220000
410
920
210000
1100000
2100
4600
!
Servotest policy is one of continual improvement and therefore specifications may change without notice.
F~T.N Lebow ProductsProductInformation
Troy, Michigan 48099
Telephone (313) 643-0220
TWX (810) 232-4818
Eaton Corporation
1728MaplelawnRoad
P.O. Box 1089
~
STRAIN GAGE LOAD CELL
MODEL
SiN
3156 - 120K
CALIBRATION
.21U3
DATE
5L1.QL89
SPECIFICATIONS:
RATED
CAPACITY-TENSION & COMPRESSION...
MAX. LOAD (without zero shift)
.........
SIGNALSENSOR..........................
BRIDGERESISTANCE......................
MAX. BRIDGEEXCITATION.................
COMPENSATED
TEMP.RANGE................
120.000
POUNDS
50% overload (150% of rated capacity)
4 arm bonded strain gage bridge
350
ohms nominal
20
volts DC or AC RMS
70 deg. F to 170 deg. F
USEABLETEMP. RANGE....................
*EFFECT OF TEMP. ON ZERO................
*EFFECT OF TEMP. ON OUTPUT
~........
.
;
-E? deg. F to +200 deg. F
fO.002% of rated capacity/deg. F
fO.002% of reading/deg. F
NONLINEARITY. . . . . . . . . . . . . . . . . . . . . . . . . . .
OUTPu'r.
. fO.
14
% of rated capacity
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .'. Compo - 1.900 mV/V at rated capacity
Tens. +
1.897
mV/V a-t:rated capacity
*within compensated temperature range
ELECTRICAL CONNECTIONS:
RECEPTACLE:
MATING CONNECTOR:
MS-3102
MS-3106
FUNCTION
PINS
RED Band
A-14S-5P
E-14S-5S
C BLK
WHT A and D GRN
RESISTANCE
Excitation
351.2
ohms
Signal
350.9
ohms
CALIBRATION:
precision wire wound resistor, when shunted across one
gage bridge, produces an electrical signal equivalent to
This shunt calibration is valid only when used with high
indicators. The equivalent values below were determined
brat ion.
.
A
LOAD VALUE
ACROSS PINS
leg of the strain
an applied load.
input impedance
by factory caliRESISTOR VALUE
911853 Lbs.
compression
BLK C and D GRN
60 K ohms
921204 Lbs.
tension
RED Band D GRN
60 K ohms
F'nrm E435-8 tRev. 4/85\
.
Printed in U.S.A.
'I1Jl!i1
=-"
if ..
T..
Lebow Products Product Information
Troy. Michigan 48099
Telephone (313) 643-0220
TWX (810) 232-4818
Eaton Corporation
1728 Maplelawn
Road
P.O. Box 1089
STRAIN
MODEL
GAGE LOAD CELL
CALIBRATION
677
SiN
3129 - 112
DATE
8/20/91
SPECIFICATIONS:
RATED CAPACITY-TENSION & COMPRESSION...
150,000
Lbs.
MAX. LOAD (without zero shift)
50% overload (150% of rated
capacity
SIGNAL SENSOR
4 arm bonded strain gage bridge
BRIDGE RESISTANCE
350
ohms nominal.
MAX. BRIDGE EXCITATION
20
volts DC or AC RMS
COMPENSATED TEMP. RANGE
70° F. to 170° F.
USEABLE TEMP. RANGE
65° F. to +200° F.
*EFFECT OF TEMP. ON ZERO
~
tO.002% of rated capacity/oF.
*EFFECT OF TEMP. ON OUTPUT
NONLINEARITY
OUTPUT.
*Within
..
"...
compensated
ELECTRICAL
tO.002% of reading/oF.
"..'..
.."
eo."
temperature
.to..1.S-% of rated capacity
eo .. .COMP. - 2.089
mVjV at rated
TENS. +?~08
cap.
rnvjV at rated cap.
range
CONNECTIONS:
RECEPTACLE:
MATING CONNECTOR:
PT02E-1O-6P
PT06W-1O-6S
~
or.MS-3102
or MS-3106
A-14S-5P
E-14S-5S
PIG
TAILS
%
RED A
(+)
and
GRN B (+) and
RESISTANCE
FUNCTION
PINS
(-)
D BLK
(-) C WHT
.J
Exc.itation
351
Signal
350.7
ohms
ohms
CALIBRATION:
A precision wire wound resistor, when shunted across one leg of the
strain gage bridge, produces an.electrical signal equivalent to an
applied load. This shunt calibration is valid only when used with
high input impedance indica tors. .The equi valen t values. below were
determined by factory calib~",ation.
LOAD
104.371
VALUE.
Lbs.compression
103.614 Lbs.tension'
'orm E~35-8 (Rev. ~/851
ACROSS.PINS
RESISTOR
VALUE
D BLK
~K
ohms
GRN B and A RED
~K
ohms
GRN. Band
Pnnted in U.S.A.