| |
WHAT IS A THERMOCOUPLE?
A thermocouple is
nothing more than two dissimilar metals soldered together to make a
heat sensing point. TSGC cables have thermocouples made of copper
and constantan (an alloy of copper and nickel), the most sensitive
combination made for grain bin temperature scanning systems. 
Spaced in cables that are placed throughout a
stored commodity, thermocouples are positioned near the outside of
the cable so that heat is transmitted easily through
the cable
jacket, giving a true indication of the temperature of the commodity
within a radius of 10' to 12' of the sensing point.
CHARACTERISTICS:
Depending upon type and
height of storage, the thermocouple spacing in the cable varies from
3' to 8'. Cables are usually hung on 20' centers for flat storage,
and
one cable per bin in typical storage bins up to 20' in
diameter. The number of thermocouples per cable is determined by the
depth of the storage structure - six thermocouples per cable is
standard in most flat storage installations. Your TSGC
representative can help you determine the length of the cable, the
exact spacing, and number of cables needed for your particular
situation.
GET MAXIMUM
PROTECTION:
Because of the varying sizes of the cable --
6, 12, 18, or 21 thermocouples, there is an appropriate varying
strength in the strain members of each complete temperature sensing
cable.
The cable flexes with the tremendous impact of
shifting grain. Its tough covering has a mirror smooth finish which
reduces friction with grain to a minimum. TSGC cables have been
laboratory tested -- they won't coil, corkscrew, stretch or break!
You can be sure of maximum reliability and protection when
you have TSGC Thermocouple Cables at work for you in your bins.
SPECIAL FEATURES:
 |
|
Exceptionally tough cable jacket resists
abrasions and is resistant to most types of chemical
attacks. |
|
|
Thermocouples and leadwires are color coded for
quicker hook-up with less chance of error. |
|
|
Clear cable jacket allows for easy visual
location of each thermocouple sensing point. |
|
|
Overall strength of the cable is enhanced with
an arrangement of galvanized steel
strands. |
TECHNICAL DATA
TSGC THERMOCABLE SPEC
SHEET
NYLON vs. VINYL Mechanical Properties
Comparison
|
NYLON |
VINYL |
| 1. Tensile strength--73
degrees F |
11,800 psi |
3,500 psi |
| *2. Flexural modulus--3 degrees F |
30,000 psi |
12,000 psi |
| 3. Elongation |
300% |
400% |
| 4. Sheer strength |
2,500 psi |
800 psi |
| 5. Hardness |
45 (R) |
94 (R) |
| 6. Impact strength |
16 ft.lbs./in. |
40 ft.lbs./in. |
| **7. Abrasion resistance |
70 mg. |
187
mg. |
* The lower the number the more flexible the material.
**
Abrasion resistance was done on a Jabor abrasion test. The
number
represents the milligrams abraded
off. Therefore, the nylon
tempolymer is
2-1/2 times more abrasion-resistant than the PVC (vinyl).
SPECIFICATIONS
Cable &
Leadwire
| TYPE |
DESCRIPTION |
|
TENSILE STRENGTH |
|
DIMENSIONS |
|
WEIGHTS |
| LD |
Light Duty |
|
1400# (635Kg.) |
|
.180" x .285"
(4.6 x 7.2mm) |
|
.04 lb/ft. (.06Kg/m) |
| RD |
Regular Duty |
|
2800# (1270Kg.) |
|
.335" (8.5mm) |
|
.10 lb/ft. (.15Kg/m) |
| HD |
Heavy Duty (18TC) |
|
5600# (2540Kg.) |
|
.370" (9.4mm) |
|
.14 lb/ft. (.21Kg/m) |
| HD |
Heavy Duty (21TC) |
|
5600# (2540Kg.) |
|
.415" (10.5mm) |
|
.14 lb/ft. (.21Kg/m) |
| XD |
Extra Duty (18TC) |
|
10000# (4535Kg.) |
|
.430" (10.9mm) |
|
.28 lb/ft. (.42Kg/m) |
| 6TC |
Leadwire |
|
0 |
|
140" (3.6mm) |
|
.015 lb/ft. (.022Kg/m) |
| 12TC |
Leadwire |
|
0 |
|
.212" (5.4mm) |
|
.021 lb/ft. (.031Kg/m) |
| 18TC |
Leadwire |
|
0 |
|
.223" (5.7mm) |
|
.027 lb/ft. (.040Kg/m) |
| 21TC |
Leadwire |
|
0 |
|
.234" (5.9mm) |
|
.035 lb/ft.
(.052Kg/m) |
NOTE: All tensile strengths have a 15% safety
margin. |
