Introduction of industrial armor thermal resistance of the selection of matters needing attention
Introduction of industrial armor thermal resistance of the selection of matters needing attention
Armored thermal resistance is a temperature sensor, when the available material in the temperature
changes, the resistance also changes with the characteristics of the temperature to measure. When
the resistance changes, the working instrument will show the corresponding value of the
temperature value. It is smaller than the assembly of platinum resistance, easy to bend, suitable
for installation in the narrow pipe and require rapid response, miniaturization and other special
occasions. It can be 200 ~ 600 ℃ temperature range of gas, liquid medium and solid surface for
automatic detection, and can be directly connected with copper wire and secondary instrument used,
because it has good electrical output characteristics, for the display , Recorders, regulators,
scanners, data loggers, and computers to provide accurate input values.
Here we give you a brief introduction to the purchase of armored thermal resistance when the
note.
Armored thermal resistance from the metal maintenance tube, insulation materials and
resistors of the three combination of cold drawn, rotary silver processing. The resistors in the
armored thermal resistance are made of platinum wire in platinum and rhodium thermocouple or
glasson brackets. The lead wire is made of steel wire or silver wire.
Precautions
Thermal resistance and appearance of the convergence of the instrument should be insulated
copper wire, not the use of thermocouple compensation wire. The resistance value of the copper
wire should be selected according to the data of the technical condition rules of the instrument.
The resistance value of the wire can be adjusted by the DC balanced bridge.
Can not be a thermal resistance and two display instruments in parallel use, only double-type
thermal resistance can be used with two display instruments used together.
Thermal resistance and its accessories are not used when the time, must be kept in the
tungsten rhenium thermocouple from vibration and collision in the center. The most suitable
storage conditions are: ambient temperature 10-35 ℃; relative humidity of not more than 80%;
the surrounding air should not contain the formation of thermal resistance parts of the material
corrosion.
When the thermal resistance is wired, the terminal box is opened first and then wired.
Wiring methods are generally two-wire and three-wire system. The advantage of the three-wire
connection is to prevent the bimetallic thermometer due to the convergence of the wire resistance
caused by the display of the indication error.
Most of the thermal resistance of the length of the sensor is about 120mm, select the thermal
resistance of the insertion depth, you should consider the thermal resistance can only amount of
sensitive components near the range of the measured medium uniform temperature.
The maximum operating temperature and working pressure of the thermal resistance shall not
exceed the rated value of the thermal resistance. If the thermal resistance is to be used in
corrosive media, a protective tube made of stainless steel shall be used. With the bending
performance, armored thermistor in addition to the head, can be bent in any direction, so it is
suitable for the structure is more complex, but also has good resistance to vibration, impact
resistance.
Contact Us:
Eric Xie
Tel: +86 15988295936
SKYPE: ericxie123@outlook.com
Whatsapp: +8615988295936
Wechat: +8615988295936
Email: sale@benoelectric.com
Website:www.benoindustry.com
