標(biāo)準(zhǔn)鉑電阻溫度計(jì)一等標(biāo)準(zhǔn)和二等儀表的標(biāo)準(zhǔn)了解

發(fā)布時(shí)間：2024-07-23

標(biāo)準(zhǔn)鉑電阻溫度計(jì)一等標(biāo)準(zhǔn)應(yīng)滿足以下條件:
w (29.764 6℃)≥1.118 07 (5)
w (29.764 6℃)為溫度計(jì)在鎵熔點(diǎn)時(shí)的電阻值rga與rtp之比,w (29.764 6℃)=rga/rtp.
標(biāo)準(zhǔn)鉑電阻溫度計(jì)二等儀表可滿足下面兩個(gè)條件之一:
w (29.764 6℃)≥1.118 07
w (100℃)≥1.392 54 (6)
w (100℃)為溫度計(jì)在100℃時(shí)電阻值r(100℃)與rtp之比,
w (100℃)=r (100℃)/rtp.