Supplementary conditioning pack

The first notable design change was in 1979, when the MR2 variant entered service, it was fitted with a Supplementary Conditioning Pack (SCP) to provide cooling air to the Nimrod MR2 s improved electronic systems. This Supplementary Conditioning Pack was powered by hot air bled off the Cross-Feed Duct - now called the Cross-Feed/SCP Duct. The normal condition of this Cross-Feed/SCP duct when in flight was therefore that it would be hot and pressurized. 

The addition of the Supplementary Conditioning Pack (SCP) to MR2s (1978-1984) provided additional cooling for the extra electronic equipment when MRls were upgraded to MR2s. The SCP required bleed-air taken off the cross-feed duct. The fitting of the SCP take-off duct significantly exacerbated the fire hazard posed by the bleed-air system. 

Higher pressures are required for pressure-assisted separations in packed columns used for capillary electrochromatography [235,376,464-466]. These columns require a high-pressure pump to provide the supplementary mobile phase flow. Conventional rotary injection valves and autosamplers can be used for sample introduction with this arrangement if a special inlet tee housing the electrode and split line with a restrictor is installed [422]. Microcolumn pumps are also useful for conditioning columns before initial use in capillary electrochromatography (section 8.4.2). There are no com-... 

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