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8000A, 8000B and 8000P
For the unit pressure compensation, there are Gas Pressure and Sensor Pressure settings. I do not understand what you mean by Gas Pressure, and under what conditions it needs to be applied. Can you give an example? If the pressure at the sensor and in the process are different, then the pressure adjust allows the reading on the instrument to be adjusted. The sensor pressure is the actual pressure at the sensor. We calibrate at atmospheric pressure, if the sensor is being used at any other pressure, changing the sensor pressure parameter will compensate the instrument display for the sensor pressure. The unit reading will display the correct dew point for atmospheric pressure. If the user wants to know the dew point at pressure in their stream, then the gas pressure parameter is used. Entering the value in the gas pressure will convert the instrument reading to the gas stream reading. Examples: If the sensor is at 100 psig and the reading on the instrument is -43.7 C dew point, the actual dew point at atmospheric conditions is -60 C. To get the instrument to read -60 C, enter 114.7 psi into the sensor pressure parameter. If the sensor is at atmospheric pressure and reading -60 C but the gas stream is at 100 psig, entering 114.7 psi into the gas pressure parameter will have the instrument read -43.7 C. Air and gas driers are usually rated as a dew point at a pressure. This parameter allows the user to match the instrument reading to the drier specification. Top of page What is the effect of temperature on the 8000 Series moisture sensors? Please refer to the following graph: Temp_Effect_on_8000_Series_Mositure_Sensors.jpg Top of page What is the maximum resistive load on the 4-20mA analog output? Maximum resistive load is 500 ohms. Top of page |
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