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2.2
TYPICAL CALIBRATION SET UP
Place the cuff in a rigid enclosure such as a tin can. Using the inflation bulb pump unit to 200
mmHG and hold. Pressure should remain steady. If it does not stay steady go to Section 3 and
use the same technique to determine where the system is leaking. The bulb, cuff and
connecting hose can all leak and may require removal.
Remove any hoses from your sphygmomanometer (Unit Under Test (UUT)) and inspect them
for cracks. If cracks are present replace hose.
Inspect the Unit Under Test (UUT) for indications of impact or physical damage.
If the UUT is an aneroid style, Sphygmomanometer, ensure that the needle is with the
rectangular zero indicator (11), see Figure 2. If not the unit requires repair prior to
proceeding.
Turn your digital pressure meter on and insure that the display (1) reads zero, if it does not
adjust to zero by using the zero adjustment. See Figure 1.
Adjust the plunger on the Pressure Applicator Syringe to to its mid point by pushing or
pulling the plunger (8) while pressing in the lead screw release button (7), see Figure 2.
Connect the silicon tubing to both the UUT and the Pressure Meter as shown in Figure 3.
Ensure both the UUT and the Pressure Meter read zero, then carefully attach the Pressure
Applicator Syringe, while ensuring that both the UUT and the Pressure Meter remain at zero.
During the remainder of the tests ensure the needle on an aneroid sphygmomanometer travels
smoothly at all times.
Turn the fine adjustment knob (8) Figure 2, until the UUT reads 100 mmHg and hold. Ensure
that the reading remains steady, if the pressure drops refer to section 3.0 Troubleshooting.
Sphygmomanometer Calibration Verification Guideline
11
10
Sphygmomanometer
Figure 2
Syringe Pressure Applicator
9
7
8
7
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