|
| for
In Vivo and In Vitro Isometric Force Measurements and
Isotonic Displacement Measurements |
| • |
Four-arm
bonded strain gage elements |
| • |
Very high stability,
accurate to ±1% |
| • |
Resolution as
high as 25,000 to 1 |
| • |
Exclusive patented
multirange* springs extend useful range from milligrams to kilograms |
| • |
May be connected
for differential forces |
| • |
Heavy integral
clamping handle – will take lots of abuse |
| • |
No microphonics
– single dimension gravitational effects |
| • |
Typical drift
spec 50 mg/hour |
| |
* Each transducer equivalent
to four single range transducers |
| DESCRIPTION |
| Four-bonded
strain gages form a rugged bridge which measures the strain produced
on a cantilever beam by the force applied. The housing is rugged
and the handle can be clamped. Gravity effects are reduced to one
dimension. High natural resonance is afforded by the cantilever.
There are no pivots — no friction. |
|
| FEATURES |
|
Both
transducer models are supplied with three sets of range springs
providing four ranges. This yields maximum working ranges of over
40 to 1 for the FT03, and 100 to 1 for the FT10, extending applications.
The FT10 is designed for the heavier forces. The FT03 has the most
useful ranges for a general purpose transducer. With Grass Polygraphs,
the FT03 gives full scale deflection with the application of a few
milligrams of force.
An
eye is provided on the beam shafts on each side of the cantilever
to facilitate attachment to the preparation. Differential forces
can be measured by connecting the gage between forces applied to
the two beam shafts.
Also,
an initial load can be applied and static forces can be balanced
out to measure only the changing forces. The gages can be used to
measure compression as well as tension.
|
| APPLICATIONS |
|
The
FT03 and FT10 Transducers were developed to measure muscle contractions
isometrically. The ranges cover applications from single fibres
to whole cat legs. Isotonic measurements can be made with externally
applied springs.
The
FT03 has been an industry standard and is especially suited for
in vitro tissue bath contractility applications. The bonded
strain gages are essentially impervious to tissue bath solutions.
A range of 0 to 50 grams is the most sensitive range for many applications.
|
|
| DYNAMIC
SPECIFICATIONS |
|
|
| |
MODEL
FT03 |
MODEL
FT10 |
|
Color
of Spring:
|
No
Spring
Used
|
Red
&
Black
|
Yellow
&
Black
|
Black
|
No
Spring
Used
|
Orange
& Black
|
Green
& Black
|
Blue
&
Black
|
|
Maximum
Working Range kg
|
0.05
|
0.2
|
1
|
2
|
0.1
|
0.5
|
2
|
10
|
|
Minimum
Reliable Force mg
|
2
|
10
|
50
|
100
|
5
|
25
|
100
|
500
|
|
Self-Resonant
Frequency Hz
|
85
|
170
|
330
|
500
|
100
|
150
|
300
|
700
|
|
Output
mV/kgm/Volt Applied
|
30
|
7.5
|
1.5
|
0.7
|
13
|
2.6
|
0.65
|
0.13
|
| STATIC
SPECIFICATIONS |
|
|
| |
FT03
|
FT10
|
| Maximum
displacement, mm |
1.1
|
1
|
| Maximum
force, kg |
10
|
20
|
| Maximum
applied voltage, VDC |
8
|
8
|
| Nominal
bridge resistance, ohms |
350
|
350
|
| Physical
Size |
|
FT03 |
| Physical
Size |
|
1"
W x 1.25" H x 6" L
(2.5 cm x 3.2 cm x 15.2 cm) |
| Weight |
|
3
oz. (84 g) |
| Physical
Size |
|
FT10 |
| Physical
Size |
|
1.25"
W x 1.75" H x 7.50" L
(3.2 cm x 4.4 cm x 19.1 cm) |
| Weight |
|
8 oz. (244 g) |
|
| STANDARD
ACCESSORIES SUPPLIED |
| FT03 |
3 pair
range extension springs
3/32" allen wrench
2 "S" hooks
3 isotonic springs: black, silver, copper
1 shielded cable (either Model TAC-8,
TAC-7, or TAC-4) |
| FT10 |
| 3
pair range extension springs
9/64" allen wrench
2
"S" hooks
1 shielded cable (either Model TAC-8,
TAC-7, or TAC-4)
|
|
| ORDERING
INFORMATION |
| Model
FT03 |
|
Force Displacement
Transducer — 2 mg to 2 kg, general purpose
for connection to: Model 7P1, 7P14, 7P122 Preamplifiers
Model P122, CP122 Amplifiers, Model PI-1-ACDC (7400) Signal Conditioner
|
| Model
FT03-T4 |
|
Force Displacement
Transducer — 2 mg to 2 kg, general purpose
for connection to: Model P11T Amplifiers |
| Model
FT03-T8 |
|
Force
Displacement Transducer — 2 mg to 2 kg, general purpose
for connection to: Model LP122 Amplifiers |
| Model
FT10 |
|
Force
Displacement Transducer — 5 mg to 10 kg, for heavier forces
for connection
to: Model 7P1, 7P14, 7P122 Preamplifiers
Model P122, CP122 Amplifiers, Model PI-1-ACDC (7400) Signal Conditioner
|
| Model
FT10-T4 |
|
Force Displacement
Transducer — 5 mg to 10 kg, for heavier forces
for connection
to: Model P11T Amplifiers |
| Model
FT10-T8 |
|
Force Displacement
Transducer — 5 mg to 10 kg, for heavier forces
for connection to: Model LP122 Amplifiers |
| Replacement
Spring Sets |
| Model
HSG-GRM2231 |
|
Set of 6 isometric
springs: 10, 2 and 0.5 kg, for FT10 |
| Model
HSG-GRM1105 |
|
Set of 6 isometric
springs: 2, 1 and 0.2 kg, for FT03 |
| Model
HSG-ISO-SETS |
|
Set of 3 isotonic
springs for FT03 |
| Replacement
Part |
| Model
GRM-2093 |
|
"S"
Hook for FT03 and FT10 |
| Model
3/32 HEX KEY |
|
3/32"
allen wrench for FT03 |
| Model
9/64 HEX KEY |
|
9/64"
allen wrench for FT10 |
| Model
TAC-4 |
|
5-foot
(1.5 m) shielded cable for FT03 and FT10 connection to: Model P11T
Amplifiers |
| Model
TAC-7 |
|
8-foot
(2.4 m) shielded cable for FT03 and FT10 connection to: Model 7P1,
7P14, 7P122 Preamplifiers, Model P122, CP122 Amplifiers, Model PI-1-ACDC
(7400) Signal Conditioner |
| Model
TAC-8 |
|
8-foot (2.4 m) shielded cable for FT03 and FT10 connection to: Model
LP122 Amplifier |
|
