液相报错 “plunger homing over press”如何处理:今天开仪器,2695打开以后进入自检,突然听到报警声,过去一看,出现了一个报错提示,“plunger homing over press”。按确认后又继续自检,然后还是出现一样的报错。只好去查看仪器报错的说明了。说明是这样写的:Plunger homing over pressure
AlarmHomingRestriction:
The solvent delivery system detected excessive pressure while moving the plunger forward to its home registration position. This condition may be caused by:
@Failure to remove the pin plug restrictor;
@Clogged in-line filter at the solvent delivery system;
@Blockage in the waste line;
@Excessive restriction between the solvent delivery system and the sample loop;
@Failure of the sample loop to vent the solvent delivery system to atmosphere by opening valves V1, V2 and V3.
我看了信息之后,回头想了想,也许是最近样品量大,仪器脏了。既然是over press,肯定是哪里超过了自检压力,应该是@Excessive restriction between the solvent delivery system and the sample loop;可能性最大。既然是超过了自检压力,泄压应该可以自检通过吧。我根据流路,看到泵后的第一个保护柱。如下图照片红色标记:
于是我拿扳手拧开了左边进口泄压,再重新自检,自检通过。原来就是这个在线过滤器脏了,拆下来洗吧。拆了后打开在线过滤器,构造如图:
把中间的柱芯用甲醇超声清洗干净,再安装上去就可以了(安装有方向)。