Assembly thermocouple
China [CN] |
Thermocouple category |
code |
Division No. |
measuring range |
Basic error limit |
|
Chromel - constantan |
|
E |
0－800℃ |
±0.75%t |
|
Chromium - nickel silicon |
WRN |
K |
0－1300℃ |
±0.75%t |
|
Platinum rhodium 13- platinum
|
WRB |
R |
0-1600℃ |
±0.25%t |
|
Platinum platinum-rhodium behaviors |
WRP |
S |
0－1600℃ |
±0.25%t |
|
Platinum Rhodium 30-Platinum Rhodium 6 |
WRR |
B |
0－1800℃ |
±0.25%t |
Note: t is the measured temperature sense component values (c)
Time constant
|
Thermal inertia level |
Constant time (seconds) |
Thermal inertia level |
Thermal inertia level |
|
Ⅰ |
90－180 |
Ⅲ |
10－30 |
|
Ⅱ |
30-90 |
Ⅳ |
<10 |
◆ thermocouple nominal pressure: generally refers to a static outside protective pipe can withstand the pressure and temperature in the work of rupture.◆ thermocouple minimum insertion depth: should be not less than the protection of 8 - 10 times the outer diameter of the sleeve (the exception list products)◆ insulation resistance: when the ambient air temperature 15 - 35 ℃, relative humidity below 80% when the insulation resistance of ≥ 5000000000000 euro (voltage 100V). With a thermocouple splash-proof junction box, when the temperature is 93 ± 3 ℃, the insulation resistance of ≥ 500000000000 euro (voltage 100V)The insulation resistance of a high temperature: thermocouple under high temperature, the thermal electrode (including double branch type) and the insulation resistance between protection tube and double heat electrode (per meter) should be greater than the value specified in the table below.
Click enlarge Image