4-1外觀

4-1Appearance

無明顯氣泡、針孔等缺陷；無任何降低使用性的可見性損傷；標(biāo)志清晰耐久。

No obvious bubble, pinhole and other defects; no any visible damage lowering using performance; clear and

long-lasting sign

目 測

Visual inspection

4-2可焊性

4-2Weldability

浸錫部分上錫均勻,上錫面積

≥90%。

Tin is uniform in tin immersion part; tinned area is ≥90%.

將壓敏電阻導(dǎo)線侵入235℃±5℃的焊錫液中2±0.5s取出，觀察外觀。

Soak pressure sensitive resistor into 235℃±5℃tin soldering liquid for 2±0.5 s; then take it out and

observe its appearance.

4-3耐焊接熱

4-3 Resistance to Soldering Heat

試驗(yàn)前后壓敏電壓變化率≤±5%

Change rate of pressure sensitive voltage before and after test is

≤±5%.

將壓敏電阻導(dǎo)線侵入350℃±10℃的焊錫液中，侵入深度距基座平面2-0.5mm，采用1.5±0.2mm的隔熱層，并維持5±0.5s，恢復(fù)時(shí)間1小時(shí)以上2小時(shí)以下測量壓敏電壓。

Soakwireof  pressure  sensitive  resistor  into 350℃

±10℃tin soldering liquid, with soak depth for 2-0.5 mm far away from pedestal. Adopt 1.5±0.2 mm thermal insulationlayerand keepitfor 5±0.5 s; measure pressure sensitive  voltage with recovery time

within 1 h-2 h.

4-4高溫負(fù)荷4-4High Temperature Load

試驗(yàn)前后

壓敏電壓變化率

≤±10%

限制電壓變化率

≤±20%

Before and after test, change rate of pressure sensitive voltage is

≤±10%; change rate of limiting voltage ≤±20%.

將壓敏電阻放置在125±2℃環(huán)境中1000小時(shí)，并施加該溫度相應(yīng)的*大允許使用交流電壓，通電90分鐘，斷電30分鐘。取出后在常溫下放置1小時(shí)以上，4小時(shí)以內(nèi)測量壓敏電壓和限制電壓。

Put pressure sensitive resistor in 125±2℃for 1,000 h and apply corresponding allowable using AC pressure of the temperature; power on for 90 min and power off for 30 min. After taking pressure sensitive resistor out, put it under normal temperature for more than 1 h; measure pressure sensitive voltage and limiting voltage

within 4 h.

4-5引出端強(qiáng)度

4-5 OutletTerminal

Strength

試驗(yàn)前后壓敏電壓變化率≤±5%

Change rate of pressure sensitive voltage before and after test is

≤±5%.

將拉力施加于引出端軸向并作用于離開樣品主體的方向，施加10N荷重10秒鐘。

Apply tension to outlet terminal axis and make it act in sample main body direction; apply 10N load for 10

s.