NIST RM 8631a Medium Test Dust (MTD)中等礦物測試粉塵(1um-50um)

NIST RM 8631a Medium Test Dust (MTD)

These SRM and RM materials are intended for use in calibrating the response of particle sizing instrumentation, including optical counters, in accordance with National Fluid Power Association(NFPA) and ISO standard methods (NFPA/T2.9.6 R2-1998, ISO/FDIS 11171, ISO/FDIS 12103) for determining particle contamination in oils.

SRM 2806a is certified for particle concentration and projected area diameter. It consists of a polydisperse, irregularly-shaped mineral dust suspended in 5606 hydraulic fluid.

RMs 8631 and 8632 are mineral test dusts of medium and ultrafine particle size and can be used to prepare suspensions in other types of oils.

NOTE: The same lot of medium test dust was used to produce SRM 2806 and RM 8631, and is a derivative of Arizona Road Dust.

本產品隸屬于NIST（National Institute of Standards and Technology，即：美國國家標準與技術研究院）的產品分類 301.5 - Particle Count Materials (powder and suspension forms) （ 即：顆粒計數材料(粉塵及懸浮液) ）；

這類產品中的SRM（Standard Reference Material，即：標準參考物質）和RM（Reference Material，即：參考物質）是用于顆粒大小測量的儀器，包括光學計數器的校準。這是根據美國國家流體動力協會（NFPA）和ISO標準方法中（NFPA/T2.9.6 R2-1998、ISO/FDIS 11171、ISO/FDIS 12103）關于確定油品中的顆粒雜質而制備的。

SRM 2806a 是被認證的雜質顆粒濃度和投影面積的標準懸浮液。它有一個多分散的，不規則性的礦物粉塵懸浮于MIL H 5606航空液壓油。

RM 8631a和8632是中等和超細顆粒尺寸的礦物測試粉塵，可用于制備在其他類型的油品懸浮液。

注：同一批次的試驗粉塵被用于生產SRM 2806和8631，這是亞利桑那道路試驗粉塵的衍生物。