Foxboro d/p Cell Transmitters have been the standard of process (a) See Optional Capsule Materials (13A Series Only) for span limits of 13A4 (Monel capsule. The Foxboro® brand Models 15A, 13A, and 13HA pneumatic d/p Cell transmitters measure differential pressure and. Download Manual Model. Regarding This Manual. • This manual should be provided to the end user. • The contents of this manual are subject to change without prior.
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Record the current reading in m A which will foxbro your first data point. Fkxboro potentiometer has a maximum of 20 turns between minimum and maximum resistance therefore turning the ZERO or SPAN screws clockwise or counter-clockwise for 20 turns will cause the potentiometer to be at either maximum or minimum.
However, if you are doing field calibration that requires the use of the actual process pressure, you will need a pressure regulator in conjunction with a pneumatic calibrator to help you control the pressure applied to the DP cell.
That is, adjusting one has an effect on the other. Most transmitter calibration done is a five point calibration. You are now ready to calibrate the DP transmitter.
Whether you are doing a bench calibration or a field calibration, the low port of the DP transmitter cell is vented to the atmosphere as shown in the connection diagram above and the high port of the DP transmitter connected to a pressure source e. Readings are taken for both increasing and decreasing input values and the corresponding transmitter output values are recorded Step 5: If you calibrate the DP transmitter before first testing and recording the as found data, the history of the device performance data will be lost.
The graph below illustrates the correlation between input and output values.
Models 15A, 13A, and 13HA Pneumatic d/p Cell® Transmitters | Schneider Electric
How to Calibrate Smart Transmitters. In most calibration done, you will be doing either a bench shop calibration — A bench calibration is a procedure where the device is calibrated at a calibration bench using calibration devices to simulate the process, — or a field calibration where the actual process is used.
Record and put down the following can easily be sourced from transmitter nameplate: Note that these screws each connect to a variable resistance potentiometer and can be turned indefinitely. That is the potentiometer is of a type that once fully adjusted clockwise or counter clockwise the screw may continue to turn without further varying the resistance for either direction.
All the reading obtained will be the as found readings.
Then connect them according to your connection diagram. A typical DP ffoxboro transmitter calibration diagram is shown below:. Newer Post Older Post Home.
Connect all the equipment needed for the calibration exercise in the appropriate manner.
Foxboro 13A d/p Cell Flow Transmitter Manual 1526 May 1963 12 Pages Used
CalibrationDP Transmitters. Share to Twitter Share to Facebook. To calibrate an instrument involves checking that the output of the given instrument corresponds to given inputs at several points janual the calibration range of the instrument.
For example if the pressure source is a hand pump, you can easily control the pressure applied to the DP cell. For your application, this could be modified slightly.
So once your equipment is well setup, power it up and pressurize the high port of your DP transmitter.