Can a 3-wire transmitter also work in a 2-wire configuration?
No.
Can each pressure transmitter measure any medium?
No, the materials stated in the data sheet are to be checked by the customer for resistance.
Can the connector be altered?
The electrical connection cannot be altered.
Can you switch between 4 ... 20 mA and 0 ... 10 V?
No, the output signal is defined in the order and cannot be changed.
What causes zero point drift?
Through the ageing of the electrical components, through temperature and load cycling.
What solutions are there against pressure spikes?
For this, we recommend a process connection with a reduced pressure port of 0.6 mm or 0.3 mm.
Will a pressure transmitter also work without a power supply?
No.
Will the pressure transmitter still work properly when the supply voltage is slightly below the minimum specified level?
Up to a certain pressure, the pressure transmitter will still provide a correct output signal. If the pressure increases beyond this point, however, the output signal will remain at the same value, since the power supply is not sufficient to drive the output fully.
What is the overpressure limit?
Pressures up to the overpressure limit will not cause any permanent damage to the measuring instrument, however, the error limits specified in the data sheet could be exceeded.
At what pressure could the pressure measuring instrument be destroyed?
Pressure values above the overpressure limit can lead to irreversible damage of the measuring instrument. It does not matter whether this pressure is present constantly or only for a short period of time. In either case, the complete destruction of the parts exposed to the pressure and the sudden escape of the pressure medium can be expected.
What is equipment for ventilation and air-conditioning used for?
Ventilation and air-conditioning equipment, also known as air-handling units, exchanges the used room air with fresh air from the outside. Rooms are thus adequately ventilated and the air quality is improved.
Why is it important to make V/AC equipment as energy-efficient as possible?
For reasons of environmental protection and cost, it is very important to make ventilation and air-conditioning equipment as energy-efficient as possible, since the largest energy consumption in residential, office and commercial real estate is spent on ventilation and air-conditioning. In addition, some EU standards now even regulate energy efficiency.
What is the function of ventilation and air-conditioning measuring instruments?
Measuring instruments for ventilation and air-conditioning can indicate any excessive pressure loss due to dirty filters, enable the control of the correct operating state and prevent frost damage to the heat exchangers. In addition, they can be used for monitoring since they are available with digital interfaces.
Which pressure connections are available with electronic pressure measuring instruments?
For electronic pressure measuring instruments, different pressure connections are available. The two most important versions are connections with internal diaphragm and connections with flush diaphragm.
How is the structure of an internal diaphragm different from the structure of a flush diaphragm?
In the case of the internal diaphragm, the medium finds its way to the sensor diaphragm inside the connection via a pressure port. With a flush diaphragm, the pressure port is sealed flush by a second diaphragm. A transmission fluid inside the sensor transmits the pressure to the internal sensor diaphragm.
When are pressure sensors with internal diaphragms or flush connections used?
Pressure sensors with an internal diaphragm are the industry standard for gaseous and liquid media, since they are easy to handle and can be manufactured at low cost. Pressure sensors with flush connections are used when the application requires a residue-free cleaning of the pressure connection.
What are the advantages of a pressure connection with flush diaphragm?
Pressure connections with flush diaphragm have the advantage that the medium cannot find its way into the interior of the connection. This means that they can also be used with crystalline, viscous, aggressive, abrasive and adhesive media. Since the flush diaphragm can be made of special materials, the sensor can be protected against possible damage.
How does a zero point error affect the accuracy of a pressure sensor?
If a zero point error occurs, the measuring result changes because the characteristic curve shifts in parallel.
How does a span error affect the accuracy of a pressure sensor?
The span error changes the measuring result since it changes the slope of the characteristic curve. At the beginning of the scale, this error is of minor importance, but it adds up and from a certain size it is noticeably significant.
How does non-linearity affect the accuracy of a pressure sensor?
The non-linearity changes the measuring result to the extent that the characteristic curve no longer represents a straight line, but rather a curve.
How do zero point errors, span errors and non-linearity affect the accuracy of pressure sensors?
If all three measuring errors occur at the same time, they either cancel each other out or increase the total error.