型號(hào)CE-IT絕緣裝置測(cè)試儀是一種全自動(dòng)，高敏感的設(shè)備，用于測(cè)試埋地管道絕緣和隔離管道過(guò)路套管，以確定其有效性。CE-IT有一個(gè)液晶讀數(shù)顯示被測(cè)絕緣體英語(yǔ)的條件。聽(tīng)到聲音信號(hào)時(shí)，CE-IT運(yùn)行，脈動(dòng)音測(cè)試周期完成時(shí)的速度增加。  
 

工作原理：

The actual resistance of a buried insulator depends on many factors, such as the environment in which the joint is located. In a very low resistivity environment, the normal resistance measurement for an insulating joint may be as low as 0.5 ohm. 埋地絕緣裝置的真實(shí)電阻取決于許多因素，諸如絕緣裝置所處的環(huán)境。在一個(gè)非常低的電阻率的環(huán)境中，一個(gè)絕緣接頭的正常電阻測(cè)量值可能是低至0.5歐姆。

Checking the insulating joint of a buried pipeline for current leakage is often a more reliable test than an internal resistance test. 通過(guò)檢測(cè)埋地管道絕緣裝置的漏電情況要比直接測(cè)量?jī)?nèi)部電阻要更為可靠。  漏電流的絕緣接頭比內(nèi)部電阻的測(cè)試通常是一個(gè)更可靠的測(cè)試。

For this reason, the CE-IT looks at the electrical characteristics of the joint itself rather than the internal resistance. In general, the following conditions are evidenced when an effective insulator is measured: 由于這個(gè)原因，CE-IT絕緣裝置測(cè)試儀更關(guān)注絕緣裝置本身的電氣特性，而不是內(nèi)部電阻。在一般情況下，當(dāng)能夠滿(mǎn)足以下條件時(shí)，這個(gè)絕緣裝置就是有效的：

1、一般而言，絕緣裝置兩端的接地電壓讀數(shù)是不一樣的。

1. Substantially different ground voltage readings are evidenced on opposite sides of the insulator.

 The delta Vg is usually smaller or even in the opposite polarity (interference coupling) on the side of the insulator which is opposite from the protected segment of the pipe. 相對(duì)于管道的保護(hù)段。

1。的相對(duì)側(cè)上的被證明基本上不同的接地電壓讀數(shù)。增量Vg為通常比較小，或什至在相反的極性（干擾耦合）  
。

2. The percentage of current leakage that the joint will allow to flow through it, is low (25 percent or less). 在絕緣裝置處能夠允許的電流泄漏率不得超過(guò)25%。

3。在絕緣裝置上的電壓降是顯著的。（一個(gè)無(wú)效的或者短路的絕緣裝置上的電壓降在不大于10毫伏的范圍內(nèi)，可以忽略不計(jì)。） 
可以忽略不計(jì)在10毫伏或更小的范圍內(nèi)）。