参数资料
型号: M3867 BK005
厂商: Alpha Wire
文件页数: 145/150页
文件大小: 0K
描述: CABLE, 12AWG,3COND, UNSHIELDED
标准包装: 1
缆线类型: 多芯
导线数: 3(1.5 对双绞线)
线规: 12 AWG
线束: 7 股 / 0.0305"
导线材料: 裸铜
套管类型: 聚氯乙烯(PVC)
套管直径: 0.134"(3.40mm)
长度: 100' (30.5m)
特点: 直埋式
颜色:
电压: 600V
工作温度: -25°C ~ 90°C
线芯绝缘: 尼龙
套管(绝缘体)厚度: 0.016"(0.41mm)
其它名称: Q4777412
Manhattan? Thermocouple Cable
Temperature Measurement
and Control
The measurement of temperature
is one of the most vital functions
in the control of manufacturing
and processing operations. As
demands for greater quality,
reliability, and economy increase,
the demands for more precise
measurement and control increase.
Newer and more sophisticated
electronic circuitry is employed
creating stringent demands
on the wire and cable used to
sense and transmit temperature
measurements. To meet these
ever-increasing demands, Alpha
has a full line of thermocouple-
grade wire and thermocouple
extension wire and cable.
The Thermocouple
At the heart of all temperature
measurements is the thermocouple.
Although involving very complex
design parameters, the fundamental
concept of all thermocouples is the
same. Two wires of dissimilar metal
are joined together at one end. An
increase in temperature creates an
electromotive force (EMF) or signal,
which is transmitted through these
wires to a monitoring device which
“reads” this signal and displays it
on a previously calibrated meter or
digital device.
The monitoring device is usually
at a location some distance away
from the actual thermocouple.
To connect the thermocouple
to the monitor requires wire or
cable (for multiple thermocouple
installations) that will maintain the
signal generated by the primary
wires in the thermocouple.
Conductor Materials
The range and accuracy of
temperature measurement are
dependent on the conductor
materials employed. Pairs of
various metal alloys will react
differently with changes in
temperature.
The following tables give
the temperature range and
tolerances for the most popular
alloy combinations. All Alpha
thermocouple wire and cable
is tested and calibrated to
the standard limits of error as
indicated. Where situations require
closer tolerances, wire and cable
calibrated to the special error limits
is available under special order.
integrity of the temperature-EMF
Limits of Error for Thermocouple Grade
ANSI Type
J
K
T
E
R
S
Material
Iron/Constantan
Chromel/Alumel
Copper/Constantan
Chromel/Constantan
Platinum 13% Rhodium/
Platinum
Platinum 10% Rhodium/
Platinum
Temperature Range (°C)
0 to 277
277 to 760
0 to 277
277 to 1260
-184 to -101
-101 to -59
-59 to 93
93 to 371
0 to 316
316 to 871
0 to 538
538 to 1482
0 to 538
538 to 1482
Standard Limits (±)
2.22°C
0.75%
2.22°C
0.75%
2%
0.83°C
0.75%
1.67°C
0.5%
1.39°C
0.25%
1.39°C
0.25%
Special Limits (±)
1.11°C
0.375%
1.11°C
0.375%
1%
1%
0.42°C
0.375%
1.25°C
0.375%
Alpha Wire | www.alphawire.com | 1-800-52 ALPHA
Specifications subject to change. For complete specifications and availability, visit www.alphawire.com.
285
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