Heart rate (HR) is the number of times the heart beats in one minute; normal rates are 60 to 100 beats per minute. Stroke volume (SV) is the amount of blood that the heart pumps out with each beat; the normal amount is 60 to 100 milliliters per beat. A stethoscope is a device that amplifies sounds.hen measuring someone's apical pulse, make sure the patient is rested before trying to count the apical pulse rate. Have the patient lie down and find the apex of the heart. Ask the patient to breathe through his or her nose with normal breaths.
The basic ambient temperature rating point of most motors is 40Â°C. A motor rated for 40Â°C is suitable for installation where the normal surrounding air temperature does not exceed 40Â°C (104Â°F). This is the starting point.
Each class is given a designation that corresponds to the upper temperature limit of the insulating material when used under normal operating conditions. The correct insulation of the winding of a motor is determined by both the temperature rise in the motor and the temperature of the ambient air.If a motor is subjected to an ambient temperature higher than 40 C, it must normally be de-rated or a higher insulation class of material used.Note: motors are typically rated for class 'B' or 'F' insulation. Tip: specify a class âFâ insulation, but a class âBâ temperature rise.f a motor is subjected to an ambient temperature higher than 40 C, it must normally be de-rated or a higher insulation class of material used. Note: motors are typically rated for class 'B' or 'F' insulation.