Welch Allyn Spot Vital Signs 420 Series User Manual

Blood Pressure Calibration Check
The Welch Allyn Spot Vital Signs is manufactured to the highest industry standards for quality
and accuracy. The device is manufactured using calibrated pressure standards traceable to NIST
(National Institute of Standards and Technology). Welch Allyn recommends that blood pressure
calibration for the Spot Vital Signs is checked on an annual basis using the following procedure.
Put the Spot Vital Signs into its blood pressure calibration check mode. In this mode, the device
will continuously display the measured pressure and the pressure release valve is closed.
1.
2.
Turn the Spot Vital Signs off.
Simultaneously press both the Power button and the Blood Pressure Start/Stop button. The
device enters its internal configuration mode.
Press the Mode button two times to enter calibration check mode. The device will show
“Cal” in the systolic display and the current pressure in the diastolic display.
Press the Blood Pressure Start/Stop button to close the device's internal valve to apply an
external pressure.
Connect the Spot Vital Signs as Calibration Check Set-up
shown. Make sure the pressure
meter used to test the Spot Vital
Signs is calibrated and that the
calibration certificate for the pres-
sure meter is traceable to the
National Institute of Standards
and Technology. The pressure
meter testing the Spot Vital Signs
must have an accuracy of better
than +3 mmHg. Use a fixed vol-
ume or a cuff wrapped around a cyl-
inder for the stabilization volume.
Pressurize the Spot Vital Signs to
slightly above 250 mmHg and bleed
down the pressure no faster than 10
mmHg per second, stopping to
check the pressure at 250, 150,
and 50 mmHg. Record the read-
ings of the device and the pressure
measurement standard at each pres-
sure. (150 - 500cc)
Calculate the difference between
the readings from the Spot Vital
Signs and the pressure measure-
ment standard at each of the speci-
fied pressures. Subtract the rated
accuracy of the pressure measure-
ment standard from the +3 mmHg rated accuracy of Spot Vital Signs. This is the pass/fail
criteria to determine if the device is within calibration or not. If the differences between Spot
Spot Vital Signs
Calibrated
Pressure Meter
(traceable to NIST)
Stabilization
Volume
Pressure Source
Spot
Vital
Signs
35

Welch Allyn Spot Vital Signs 420 Series Specifications

General

Brand	Welch Allyn
Model	Spot Vital Signs 420 Series
Category	Medical Equipment
Language	English