Transmitter is a device which is used for convert the physical value that we archive from measure the real thing into electrical signal which electrical device know what it is. The signal we archive from converting is a standard signal follows to international standard. Before using the transmitter, we have to understand the datasheet. If we design the new range of transmitter for measuring, calibration is the first thing we have to do. After calibration, we have to ensure the calibration range by using the standard.