The pump characteristics test set includes auxiliary pumps, flow measurement lines, pressure measurement lines, valves, measurement instruments and other auxiliary lines. Which flow measurement piping, pressure measurement piping, valves, measuring instruments and other auxiliary piping and pumps under normal operating conditions of the test setup is the same. The difference is the choice of auxiliary pumps. Auxiliary pump flow and head on the test can be successfully carried out to play a decisive role, in general, the use of auxiliary pump flow should be at least 2-3 times the test pump, head at least because the test pump 2-3 times. Rotational speed of zero in the measurement of torque in the special conditions to choose a static torque sensor, his range selection can be calculated according to the output power of the auxiliary pump, but take into account the loss of piping, pump losses and other factors!

Generally referred to as the performance test of the pump, refers to the performance test under normal operating conditions, but also the pump running in the positive rotation, positive head (impeller outlet energy is greater than the inlet energy), positive flow (liquid from the suction port to the discharge port), positive torque (the prime mover to the transfer of mechanical energy to the liquid) conditions. The opposite of the above, respectively, known as reversal, negative head, negative flow, negative torque. In special operating conditions, the pump can be in one or more of these parameters with a negative value of the case of operation, the pump's four-quadrant characteristics means that these parameters are different combinations of characteristics.

As the use of pumps and the use of the expanding field, there are often several pumps in series or parallel operation, which may occur due to a pump failure, resulting in other pumps operating in a non-normal state. In addition, due to the use of pumps in different situations, there may also be pumps running in reverse. Therefore, people are more and more concerned about the use of pumps in a variety of operating conditions of the characteristics. Therefore, the study of the pump's four-quadrant characteristics of the pump for the use of research and designers are very necessary deep-well submersible pumps