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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Foxboro 13A, 13HA, 15A Pneumatic D/P Cell Transmitter

Most transmitter calibration done is a five point calibration. CalibrationDP Transmitters.

For your application, this could be modified slightly. To calibrate an instrument involves checking that the output of the given instrument corresponds to given inputs at several points throughout the calibration range of the instrument.

Newer Post Older Post Home. All the reading obtained will be the as found readings. Readings are taken for both increasing and decreasing input values and the corresponding transmitter output values are recorded Step 5: Connect all the equipment needed for the calibration exercise in the appropriate manner.


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.

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.

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.

Foxboro 13A,13HA,13DMP Pneumatic Differential PressureTransmitters

So once your equipment is well setup, power it up and pressurize the high port of your DP transmitter. A typical DP cell transmitter calibration diagram is shown below:. 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.

The graph below illustrates the correlation between input and output values. Note that these screws each connect to a variable resistance potentiometer and can be turned indefinitely. How to Calibrate Smart Transmitters. Record and put down the following can easily be sourced from transmitter nameplate: 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.


Foxboro 13a-ms2 manual – Google Docs

The 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. Record the current reading in m A which will be your first data point.

That is, adjusting one has an effect on the other. Then connect them according to your connection diagram.

Foxboro 13A,13HA,13DMP Pneumatic Differential PressureTransmitters

For example if the pressure source is a hand pump, you can easily control the pressure applied to majual DP cell. You are now ready to calibrate the DP transmitter. Share to Twitter Share to Facebook.