熱電阻安裝使用說明

WZ□□系列工業熱電阻安裝使用說明書

• 概述

WZ□系列工業熱電阻是我廠生產的溫度傳感器中的一個系列，它測溫的精度較熱電偶高，與顯示儀表配套，以直接測量生產過程中-200℃— +600℃范圍內的液體、氣體介質以及固體表面等的溫度。它廣泛用于石油、化工、機械、冶金、電力、輕紡、食品、原子能、宇航等工業部門和科技領域。

• 工作原理

熱電阻的作用是利用物質在溫度變化時本身電阻也隨著發生變化的特性來測量溫度。

• 選擇

1.根據測量的范圍和對象，選擇適當的工業熱電阻型號以及保護管材料，熱電阻的“zui高使用”壓力不可超過在該工作溫度下保護管所能承受的壓力。

 2.選用工業熱電阻的分度號必須與顯示儀表的分度號一致。

 3.除雙支式的工業熱電阻外，在不使用切換開關的情況下，每支工業熱電阻不可同時和兩支顯示儀表連接使用。

• 工業熱電阻的基本性能
  1. 在0℃時公稱電阻值（Ro）及測溫允差（見下表）：

注：1）| t | 為被測溫度的值。

2）分度號為Pt10、Pt100的工業鉑電阻符合ZBY301-85《工業鉑熱電阻技術條件及分度表》標準。

3）分度號為Cu50、Cu100工業銅電阻符合ZBNI1010-88《工業銅電阻技術條件及分度表》標準。

2.WZ□系列工業熱電阻的常溫絕緣電阻

 1）.工業鉑熱電阻的常溫絕緣電阻值應不小于100MΩ。

 2）.工業銅熱電阻的常溫絕緣電阻應不小于50MΩ。

常溫絕緣電阻的試驗電壓為10~100±10VDC(環境溫度應在15~35℃范圍內，相對濕度不大于80%)。

3.WZ□系列工業熱電阻的熱響應時間

4.WZ□系列工業熱電阻的長度規格（單位：mm）

  1）.φ12保護管規格（總長L）有：225，250，300，350，400，450，550，650，900，1150。

  2）.φ16保護管規格（總長L）有：300，350，400，450，500，650，900，1150，1650，2150。

  3）.錐形保護管（總長L）有：225，250，300，350，400。

  注：WZ□系列工業熱電阻的插入長度1=L-150mm。

• 安裝

1.工業熱電阻的安裝地點，應避免安裝在爐門旁邊和避免與加熱物體距離過近之處。

 2.工業熱電阻的接線盒不可碰到被測介質的容器壁，接線盒的溫度不宜超過100℃，并盡可能地保持穩定不變。

 3.工業熱電阻的插入深度，浸入被測介質中的長度應不小于保護管外徑的10倍。

• 使用注意事項

1.連接導線應采用絕緣（是屏蔽）銅線，截面積視工業熱電阻與顯示儀表間的距離而定，但一般不得小于1.5mm²。導線的電阻值應按顯示儀表技術條件規定的數據配準（一般為5~15Ω），導線的電阻值可用惠斯頓電橋來調整。

   2.增加被測介質的循環，使工業熱電阻與被測介質間的對流傳熱增加。

   3.當工業熱電阻用來測量變化的溫場時，常有動態誤差的存在，請注意選用具有適當熱響應時間的工業熱電阻，因為熱響應時間的大小是決定動態誤差大小的主要因素，并與之成正比，它對溫度的自動調節和控制起著相當重要的作用。

   4.根據用戶需要，我廠可為用戶提供各種要求特殊性能規格和尺寸的工業熱電阻。可來人來函以技術協議的形式供貨。

•  運輸與保存

工業熱電阻在安裝使用前，應保存在不受震動和碰撞的地方。zui合適的存放場所條件為：

環境溫度為-20~+40℃。相對濕度不大于80%的通風室內。且不含有對工業熱電阻起腐蝕作用的有害雜質。

• 可能發生故障和修理

WZ □ □ series of industrial thermal resistance installation Manual

1. Overview

WZ □ series of industrial heat resistance is my factory production of temperature sensors in a series, the accuracy of its temperature higher than the thermocouple, and display instruments complementary to direct measurement of the production process -200 ℃ - +600 ℃ within the scope of Liquid, gas, and other media and the solid surface temperature. It widely used in petroleum, chemical, mechanical, metallurgical, power, textile, food, atomic energy, aerospace and other industrial sectors and technology areas.

1. the principle of

Heat resistance is the role of temperature change in the use of substances at their own resistance to change also with the characteristics to measure temperature.

1. Choose

1. According to measure the scope and targets, select appropriate models of industrial heat resistance and the protection of materials, heat resistance, "the maximum use of" pressure should be less than the temperature under the protection of the work can bear the pressure.
  2. Selection of the industrial sub-degree heat resistance, the instrument must be displayed at the same degree of.
  3. In addition to the double-supported industrial thermal resistance, is not in use, switch the circumstances, every industrial thermal resistance can not be displayed at the same time, and two connecting the use of instruments.

1. industrial thermal resistance of the basic properties

1. 0 ℃ at the nominal value of resistance (Ro) and temperature tolerance (see table below):

Note: 1) | t | for the measured temperature of absolute value.
2), for sub-degree Pt10, Pt100 industrial platinum resistance with ZBY301-85 "industrial platinum heat resistance and technical conditions at Table" standard.
3), for sub-degree Cu50, Cu100 industrial copper resistance with ZBNI1010-88 "Copper resistance technology industry conditions and sub-Table" standard.
2.WZ □ series of industrial heat resistance of insulation resistance at room temperature
  1). Industrial platinum resistance at room temperature thermal insulation resistance value of not less than 100 M Ω.
  2). Industrial copper at room temperature thermal resistance of the insulation resistance should be not less than 50 M Ω.
At room temperature insulation resistance of the test voltage of 10 ~ 100 ± 10VDC (ambient temperature should be 15 ~ 35 ℃ range, relative humidity of not more than 80 per cent).
3.WZ □ series of industrial heat resistance of thermal response time.

4、WZ □ series of industrial heat resistance of the length specifications (unit: mm)
   1). Φ12 protection of the specifications (General L): 225,250,300,350,400,450,550,650,900,1150.
   2). Φ16 protection of the specifications (General L): 300,350,400,450,500,650,900,1150,1650,2150.
   3). Cone of protection (General L): 225,250,300,350,400.
   Note: WZ □ series of industrial heat resistance insert length 1 = L-150mm.

1. the installation

1. Thermal resistance of industrial locations, should be avoided in the Furnace Door installed next to the heating and avoid objects in the distance over the past.
  2. Industrial thermal resistance junction box can not meet the vessel wall measured media, the temperature junction box should not be超過100 ℃, and as far as possible to maintain stability unchanged.
  3. Industrial thermal resistance insertion depth, immersion in the medium measured the length of protection should be not less than 10 times the diameter.

1. the use of Attention

1. Connecting wire insulation should be used (preferably shielding) copper wire, cross-sectional area as industrial heat resistance and display meters and the distance between, but generally not less than 1.5 mm2. Wire resistance values should be the instrument showed that technical requirements of the registration data (normally 5 ~ 15 Ω), wire-resistance values can be used to adjust the Houston Bridge.
    2. Tested medium to increase the cycle of industrial tested medium heat resistance and the spread of the increase.
    3. When the industrial thermal resistance used to measure changes in temperature field, often the existence of dynamic error, please note that with the proper choice of response time of industrial heat resistance, because the thermal response time is to determine the size of the main dynamic error, And with proportional to its temperature of the automatic adjustment and control plays a very important role.
    4. Based on user needs, I can plant to provide users with special requirements of performance specifications and size of industrial heat resistance. Can be our link to technology in the form of supply agreement.

1. transportation and predervation

Industrial thermal resistance in the installation, should be kept free of vibration, and the collision area. The most suitable conditions for the storage places:
Ambient temperature of -20 ~ +40 ℃. Relative humidity of not more than 80 per cent of the indoor ventilation. Does not contain the industrial thermal resistance from the corrosive effect of harmful impurities.

1. probably to a fault and repair