Use multifunction calibrator

Using a Multifunction Process or Multifunction
Calibrator The advantages of a multifunction calibrator are their ability to read and source for various input and output signals such as voltage, current, frequency and resistance. Since these signals are very common industrial processes, with this multifunction calibrator capability, they are suitable for further calibration of instrumentation in industrial processes.
The exact calibration method depends on the type of instrument being calibrated. For some instruments, such as monitors and controllers, the calibrator is used as a source to simulate a signal read by the calibrated unit. Because the signal sent by the calibrator has a certain accuracy, any difference can be an error in the unit being tested. The test unit can be adjusted according to the error to show the correct value.
On the other hand, sensors and transmitters can be put to the test - for example, a pressure sensor that is pressurized by a hand pump and a multi-purpose calibrator used to read the signal sent in those conditions. Again, by comparing the applied pressure with the signal sent by the sensor, the error or accuracy of the device can be easily determined.
Often, using a multifunction calibrator, for example, has more device pressure than calibration with a load test or dead wit tester. For example, you may need test modules or other accessories, such as a hand pump (for pressure sensors or transmitters).
Examples of the use of calibrators in different types of signals:

Voltage : Voltage signals are very common in industrial processes. Voltage signals are found in barometers, level gauges, water quality equipment, humidity, air and many other applications.
Current : Like voltage, current signal is very common. Current signal is also used for current loops in a wide range of different applications of industrial processes, records, etc.
Frequency : Frequency signals are often used in cases where they use pulse output. This includes meters and flowmeters or flowmeters and many others.
Resistance: Resistance signals are commonly used in temperature applications including RTD and thermistors.

Things to consider when choosing a multifunction calibrator:
In the first step, you need to see what kind of signal is going to be calibrated using the calibrator? What measurement parameters do the equipment under test have?
Where is the calibration done? Lab? Or equipped at work?
What level of accuracy is required?
Are industrial communication protocols required?
If so, what type of adapter is required to connect the test unit to the calibrator?
Do I need a calibration certificate? If the answer is yes, it should be seen which of the certificates is desired.