A 50-ml sine-wave pump is used to calibrate a 450-L plethysmograph.While the pump is running,the computer display shows a deflection of 25 cm.What is the box calibration factor for this system?
A) 0.5 L/cm
B) 1.25 L/cm
C) 2 ml/cm
D) 0.5 ml/cm

Question

Quizplus · Accepted Answer

To find the box calibration factor, we need to calculate the volume of 1 cm deflection on the computer display.

1 cm deflection = 50 ml/sine wave
25 cm deflection = 50 ml/sine wave * 25 = 1250 ml

Therefore, 1 cm deflection represents 1250 ml/25 cm = 50 ml/cm or 2 ml/inch (since there are 2.54 cm in an inch).

So the box calibration factor is 2 ml/cm.

A 50-Ml Sine-Wave Pump Is Used to Calibrate a 450-L