氧气传感器常见问题解答
Oxygen availability determines the rate of many biological and chemical processes and is required for aerobic respiration. It is the absolute amount of oxygen (measured as partial pressure in kilopascals) that nearly always determines oxygen availability, but we think of oxygen as a percent of the total number of molecules in the air (20.95 %). The best example of this is the oxygen on top of Mount Everest, which is 20.95 %, but most climbers need supplemental oxygen to get to the top.
有两种类型的氧气传感器：测量气态o的那些2并且那些测量溶液中溶解氧的人。Apogee传感器测量气体o2作为百分比。气体传感器以百分比读出，因为该值不会随温度或压力而变化。
有多种用于测量气态氧气的技术。三种广泛使用的环境应用方法是电池电池传感器，极光传感器和光学传感器。ApoGee传感器是一种电流细胞类型，其通过氧气的电化学反应与电解质一起操作，这产生电流。电化学反应在反应中消耗少量氧气，以产生电流和随后的MV输出。电极之间的电流与测量的氧浓度成比例，并且内部桥电阻器用于提供MV输出。MV输出响应空气中氧气的分压。
有两种类型的氧气传感器：测量气态o的那些2并且那些测量溶液中溶解氧的人。Apogee传感器测量气体o2作为百分比。气体传感器以百分比读出，因为该值不会随温度或压力而变化。
有多种用于测量气态氧气的技术。三种广泛使用的环境应用方法是电池电池传感器，极光传感器和光学传感器。ApoGee传感器是一种电流细胞类型，其通过氧气的电化学反应与电解质一起操作，这产生电流。电化学反应在反应中消耗少量氧气，以产生电流和随后的MV输出。电极之间的电流与测量的氧浓度成比例，并且内部桥电阻器用于提供MV输出。MV输出响应空气中氧气的分压。
In order to keep condensation from forming on the sensor's Teflon membrane (where oxygen diffusion occurs), the built-in heater is designed to warm the sensor to a temperature slightly above the ambient temperature. This is particularly important in soil applications where the relative humidity is normally at 100 %. For this reason, it is recommended that the heater be continuously powered. Once condensation forms on the membrane, the sensor must be removed from the humid environment and allowed to dry before the condensation evaporates and the signal returns. If the heaters are turned off and condensation forms, the heaters don't supply enough energy to evaporate the condensation once they are turned back on. The heater requires a 12 V DC input and consumes about 74 mW of power. This works out to about 6 mA of current draw.
Sensor recalibration can be conducted periodically and should be determined by the level of measurement accuracy required for the application. Apogee recommends the SO-100 series be recalibrated every 2-3 years and the SO-200 series be recalibrated every year. SO-100 and SO-200 series sensors decrease by approximately 1 mV (SO-100 series) and 0.8 mV (SO-200 series) or approximately 2 % (SO-100 series) and 6 % (SO-200 series) of signal output per year at 20.95 % oxygen. This signal decrease yields increases in calibration factor of approximately 2 % (SO-100 series) and 6 % (SO-200 series). Further information can be found in the Maintenance and Recalibration section of themanual。
SO-100 series sensors should read approximately 60 mV at sea level in ambient air (20.95 % O2). SO-200 series sensors should read approximately 12 mV at sea level in ambient air. These voltages will decrease by approximately 1 % per 100 meters of elevation increase above sea level.
Lower pressure can result in higher readings from your sensor. A barometric pressure correction should be applied to all oxygen sensors that are calibrated to read relative oxygen concentration. Further information and the equation to correct relative oxygen measurements for barometric pressure can be found in the Operation and Measurement section of themanual。另外，低于60kPa（8.7psi）限制的压力可能导致电解质过度蒸发并减少传感器的寿命。
理想的气体定律表明，对于测量绝对气体浓度的传感器，绝对气体浓度在20℃的温度下降0.341％。导致表观降低0.0714％，相对氧浓度为20.878％。应施加校正以补偿温度效应。在操作和测量部分中可以找到进一步的信息和校正空气中的相对氧气测量的方程，以便在操作和测量部分中找到manual。
Flow-through applications should have a minimum of 200 to 300 mL/min flow rate.
No, it measures the absolute concentration of gaseous oxygen.
No it won't. It might read "0 %" oxygen when it is wet, but will return to normal once it dries out. The housing of the sensor is polypropylene plastic, potted solid, and is waterproof.
Yes, if properly spliced, the signal from the sensor is not affected by splicing on additional cable. Please check the用户手册for details and limitations on adding cable. For information on how to create a proper waterproof splice, please visit our教学网页or watch our视频。我们提供我们的高品质电缆和拼接套件的定制电缆长度，可在购买时或以后的日期订购。
AC-100通信电缆用于从我们的任何手持式仪表中下载保存的测量值。该USB电缆包括内置电路板，用于转换电压电平与米常规USB电缆兼容的电压电平。AC-100还配备了闪存驱动器，包括必要的计算机软件，驱动程序和指令。如果您已经拥有AC-100并只需需要软件文件点击这里。
不可以。所有的Apogee仪表（Mo，MP，MQ和MU系列）都具有内置于仪表中的传感器，或者通过两米电缆连接。如果您仅订购传感器（SI，SO，SP，SQ和SU系列），您需要拥有自己的数据记录器（或根据传感器，电压表）来收集传感器的信息。
尽管可以将附加电缆接合到单独的传感器，但请注意，电缆线直接焊接到仪表的电路板中。应注意拆下仪表的后面板，以便在额外的电缆上接入电路板并拼接，否则需要在仪表和传感器头之间进行两种接头。点击这里有关如何扩展传感器电缆长度的更多详细信息。
错误代码将出现代替LCD显示屏上的实时读数，并将继续闪烁，直到问题纠正。有关完成修复的步骤，请参阅manual。
| 呃1：电池电压超出范围。 | 使固定：更换CR2320电池并执行主复位。 |
| Err 2:传感器电压超出范围。 | 使固定：perform master reset. |
| Err 3:Not calibrated. | 使固定：perform master reset. |
| Err 4:CPU电压低于最小值。 | 使固定：更换CR2320电池并执行主复位。 |
The meter takes a CR2320 coin cell battery.
Apogee氧传感器可与二氧化碳传感器结合使用，以帮助改善土壤呼吸的表征。通常，土壤氧传感器使用电池来产生与所测量的氧浓度成比例的电流。这些氧气传感器以各种深度埋入以监测氧气耗尽随时间，然后用于预测土壤呼吸速率。Apogee氧气传感器配备有内置加热器，以防止在可渗透膜上形成凝结，因为相对湿度可达到土壤中100％。
可以执行主重置，以纠正问题。*注意：主重置将删除存储器的所有记录测量值。
首先按下电源按钮，以便激活LCD显示屏。虽然仍然有动力，请将电池从支架中滑出，这将导致液晶显示器淡出。几秒钟后，将电池滑回支架。LCD显示屏将闪存所有段，然后显示修订号。这表示执行了主复位，并且显示器应返回正常情况。
No – user should record the starting time when the meter is placed in LOG mode and take note of time when sampled readings are taken.
当在日志模式下，仪表将打开/关闭，每30秒开启/关闭。每30分钟仪表将平均六十六次测量，并将平均值记录到内存中。仪表可以存储多达99个平均值，并在有99次测量后开始覆盖最旧的测量。每48次平均测量（制作24小时），仪表也将以每米的每天摩尔斯储存99总计，每天平方（Mol M）-2d-1).
当在SMPL模式下按下样本按钮录制最多99次手动测量（LCD显示屏的右上角的计数器表示保存的测量值）。