光干涉式甲烷测定器操作规程.doc

光干涉式甲烷测定器操作规程依据标准：JJG667-2006检定环境条件：1、环境温度：1535，波动不大于2； 2、环境相对湿度：85% ；3、周围环境应无影响检定的干扰气体。操作技术要求：一、 外观及通电检查1、外观检查：仪器应有名称、型号、编号、制造日期、制造厂名、测量范围及表示单位和符号及煤安标志，各转动部件应能正常动作。2、干涉条纹的检查：转动调零手轮应能找到干涉条纹，并明亮清晰，不得有影响读取示值的弯曲和倾斜。在全程范围移动时，不得有急跳现象，并无色的变化。3、主分度板的检查：调节目镜，应能见到全部分度刻线和数字。4、测微分度盘检查：转动测微手轮，应能连续见到全部分度刻度和数字。5、光学零件的检查：不应有显著的影响测量的腐蚀、气泡、砂眼、麻点、擦痕、指印和灰尘等。二、 气密性检定对测定器甲烷室气路系统施加7kPa压力，保持10min，后5min的压力降不得超过10Pa。三、 示值误差检定1、用清洁空气吹洗气路，时间不少于30s。将测定器的手动吸气球及机外的过滤器取下，用堵头将测定器出气口堵上，连接气体加压器、标准压力计。2、对测量范围为（0-10）% CH4的测定器检定1% CH4、3% CH4、6%CH4、9%CH44点，测量范围为（0-100）% CH4的测定器检定5% CH4、10%CH4、30%CH4、60%CH4、90%CH45点。3、输入检定点对应的压力，读取测定器示值，每点作三次，取其算术平均值为测定器示值。测定器示值与标准值之差不应超过规定表1测量范围为体积分数（0-10）% CH4测定器的示值误差分段/% CH40x11x44x77x10示值误差/% CH40.050.100.200.30表2测量范围为体积分数（0-100）% CH4测定器的示值误差分段/% CH40x1010x4040x7070x100示值误差/% CH40.51.02.03.04、环境温度不是20，按压力公式换算P=1.7665（273+t）x式中p在环境温度t时，对应测定器甲烷体积分数x%CH4点的压力值，Pat环境温度， x对应压力p的甲烷体积分数，%CH4表3体积分数（0-10）% CH4测定器15-35压力与甲烷体积分数的对应关系表体 积分数温度12345678910150.5091.0181.5262.0352.5443.0533.5614.0704.5795.088160.5111.0211.5322.0422.5533.0633.5744.0844.5955.105170.5121.0251.5372.0492.5613.0743.5864.0984.6115.123180.5141.0281.5422.0562.5703.0843.5984.1124.6265.141190.5161.0321.5472.0632.5793.0953.6114.1274.6425.158200.5181.0351.5532.0702.5883.1063.6234.1414.6585.176210.5191.0391.5582.0772.5973.1163.6354.1554.6745.194220.5211.0421.5632.0842.6063.1273.6484.1694.6905.211230.5231.0461.5692.0922.6143.1373.6604.1834.7065.229240.5251.0491.5742.0992.6233.1483.6734.1974.7225.247250.5261.0531.5792.1062.6323.1593.6854.2114.7385.264260.5281.0561.5852.1132.6413.1693.6974.2254.7545.282270.5301.0601.5902.1202.6503.1803.7104.2404.7705.300280.5321.0631.5952.1272.6593.1903.7224.2544.7855.317290.5331.0671.6002.1342.6673.2013.7344.2684.8015.335300.5351.0711.6062.1412.6763.2123.7474.2824.8175.353310.5381.0741.6112.1482.6853.222 3.7594.2964.8335.370320.5391.0781.6162.1552.6943.2333.7714.3104.8495.388330.5411.0811.6222.1622.7023.2433.7844.3244.8655.405340.5421.0851.6272.1692.7123.2543.7964.3394.8815.423350.5441.0881.6322.1762.7203.2643.8094.3534.8975.441表4 体积分数（0-100）% CH4测定器15-35压力与甲烷体积分数的对应关系表体 积分数温度102030405060708090100155.0910.1815.2620.3525.4430.5335.6140.7045.7950.88165.1110.2115.3220.4225.5330.6335.7440.8445.9551.05175.1210.2515.3720.4925.6130.7435.8640.9846.1151.23185.1410.2815.4220.5625.7030.8435.9841.1246.2651.41195.1610.3215.4720.6325.7930.9536.1141.2746.4251.58205.1810.3515.5320.7025.8831.0636.2341.4146.5851.76215.1910.3915.5820.7725.9731.1636.3541.5546.7451.94225.2110.4215.6320.8426.0631.2736.4841.6946.9052.11235.2310.4615.6920.9226.1431.3736.6041.8347.0652.29245.2510.4915.7420.9926.2331.4836.7341.9747.2252.47255.2610.5315.7921.0626.3231.5936.8542.1147.3852.64265.2810.5615.8521.1326.4131.6936.9742.2547.5452.82275.3010.6015.9021.2026.5031.8037.1042.4047.7053.00285.3210.6315.9521.2726.5931.9037.2242.5447.8553.17295.3310.6716.0021.3426.6732.0137.3442.6848.0153.35305.3510.7116.0621.4126.7632.1237.4742.8248.1753.53315.3810.7416.1121.4826.8532.22 37.5942.9648.3353.70325.3910.7816.1621.5526.9432.3337.7143.1048.4953.88335.4110.8116.2221.6227.0232.4337.8443.2448.6554.05345.4210.8516.2721.6927.1232.5437.9643.3948.8154.23355.4410.8816.3221.7627.2032.6438.0943.5348.9754.41四、 重复性检定检定点