光干涉甲烷测定器校验方法(教案)

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1、光干涉甲烷测定器校验方法一、环境条件检查，查看检定环境的温度和湿度是否符合要求。二、查看被检仪器的型号名称、出厂编号填表。三、仪器的外观与通电检查外观完好、结构完整、附件齐全、连接可靠、外露的工作部件均能正常工作。干涉条纹明亮清晰，没有影响读取示值的弯曲和倾斜。条纹在全量程范围内移动时，没有急跳现象，并无色的变化。转动测微手轮，干涉条纹的移动量与测微手轮的刻度相对应。四、气密性能检查将被测仪器的抽出嘴用堵头堵死，进气嘴与压力计胶管相连，确认补偿微压计在关闭状态，打开液体压力计，用压力调压计对测定器甲烷室气路系统施加7KPa（714mmH2O）压力，保持10min。读取后5min的压力

2、下降值，不超过10Pa判定为合格。五、示值误差检定1、首先用清洁空气吹洗气路，时间不少于30s。2、将仪器对好零位，并用橡胶堵头把仪器出气嘴堵上,再用胶管将仪器进气嘴与带有气压源的液体压力计相连接。3、查表得出各检定点需要加压的水柱高度并记录。4、打开补偿微压计阀门，完成1%CH4，3%CH4检定点的检定。关闭补偿微压计阀门，用水柱压力计完成6%CH4，9%CH4检定点的检定。由低到高依次检定，每点检定三次，取三次算术平均值为测量值，用该测量值减去标准值的差作为该点基本误差。光干涉甲烷测定器校验原始记录型号名称出厂编号环境温度（℃）相对湿度（％）外观与通电检查气密性能检查示值误差检定

3、标准值压力值（mmH2O）被检仪器示值（％CH4）平均值（％CH4）基本误差（％CH4）1231.003.006.009.00校验人：校验结果：校验日期：附表：环境温度、检定点、水柱高度（mm）对照表℃1%3%6%9%℃1%3%6%9%1551.98155.86311.71467.571652.14156.33312.66469.0015.152.00155.90311.81467.7116.152.16156.39312.78469.1715.252.02155.95311.90467.8516.252.18156.45312.89469.3415.352.03156.00312.

4、00468.0016.352.20156.50313.01469.5115.452.05156.05312.09468.1416.452.22156.56313.12469.6815.552.06156.09312.19468.2816.552.24156.62313.24469.8515.652.08156.14312.28468.4316.652.26156.67313.35470.0215.752.09156.19312.38468.5716.752.28156.73313.46470.2015.852.11156.24312.47468.7116.852.30156.7931

5、3.58470.3715.952.13156.28312.57468.8516.952.31156.85313.99470.541752.33156.90313.81470.711852.52.157.47314.95472.4217.152.35156.96313.92470.8818.152.54157.53315.06472.5917.252.37157.02314.03471.0518.252.56157.59315.18472.7617.352.39157.07314.15471.2218.352.58157.65315.29472.9417.452.41157.13314

6、.26471.3918.452.60157.70315.40473.1117.552.43157.19314.38471.5718.552.62157.76315.52473.2817.652.45157.25314.49471.7418.652.64157.81315.63473.4517.752.47157.30314.61471.9118.752.66157.87315.74473.6217.852.49157.36314.72472.0818.852.68157.93315.86473.7917.952.51157.42314.83472.2518.952.70157.993

7、15.98473.961952.71158.04316.09474.132052.90158.60317.2475.8019.152.73158.10316.20474.3020.152.92158.66317.33475.9919.252.75158.16316.31474.4720.252.94158.73317.45476.1819.352.77158.21316.42474.6320.352.96158.79317.58476.3719.452.7