在ASHRAE标准51-75和AMCA标准210-74的指导下，加上确定现场安装性能测试的测试精度的明确需求，尝试确定风机现场测试中可能遇到的一系列错误。本指南前面的章节详细描述了现场测试中遇到的问题。已经介绍了一些典型现场安装的例子。·可以安装无数其他风扇系统。每个装置在现场测试方面都有其独特的问题。在令人满意的测量平面、测量方法、系统不稳定性等方面存在不同程度的困难。根据现场经验，为每个测量量分配了最小和最大百分比误差。测量量包括大气压力、温度、速度、功率输入、流量测量面积、风扇压力等。 然后将这些单独的最小和最大百分比误差进行统计组合，以得出风扇流量、压力和功率输入的整体百分比误差的可能范围。任何给定的现场安装都不太可能导致所有最小或最大错误。试验前，双方应就可接受的测量公差达成一致。为了进行现场测试，结果中的误差将以风机流量、压力和功率输入表示。引文:德克萨斯州达拉斯ASHRAE交易会第82卷第1部分研讨会

Following the lead taken by ASHRAE Standard 51-75 and AMCA Standard 210-74, plus a very definite need for the determination of test accuracy on performance tests of field installations, an attempt was made to establish a range of errors likely to be encountered in the field testing of fans.The preceding sections of this guide have described in detail the problems encountered in field testing. A number of examples of typical field installations have been presented. ·Innumerable other fan system installations are possible. Each installation has its own unique problems with regard to field testing.Varying degrees of difficulty exist with regard to satisfactory measurement planes, methods of measurement, system instability, etc. Based upon field experience, minimum and maximum percentage errors were assigned to each measured quantity. Measured quantities include barometric pressure, temperatures, speed, power input, flow measurement area, fan pressures, etc. These individual minimum and maximum percentage errors are then combined statistically in order to arrive at a probable range of overall percentage error for the fan flow rate, pressure and power input. It is unlikely that any given field installation would lead to all minimum or all maximum errors. Agreement of the parties as to acceptable measurement tolerances should be established prior to testing.For the purpose of a field test the error in results will be expressed in terms of fan flow rate, pressure and power input.