Welch Allyn Vital Signs 52000 Test procedure

Title: Vital Signs Monitor Date: November 25, 2010
By: Welch Allyn, Skaneateles Falls, NY
File = 52000-Mon.doc

DISCLAIMER: THIS PROCEDURE PROVIDED "AS IS"
AND WITH POSSIBLE FAULTS. USER MUST VERIFY
BEFORE USE. NEITHER PROVIDER NOR WEBSITE
ASSUMES ANY RESPONSIBILITY FOR ITS USE.

1. General
Applies to Vital Signs monitors in the 52000 series.

2. Reference Documents
The manufacturer no longer supports this unit. However
user and service manuals can be found on the internet.
Example:

http://meenamedical.com/uploads/Manuals/BloodPressure/service_manual_WA_52000.pdf

3. Tools
Digital Manometer, Blood Pressure Simulator, Temperature
Calibration Key

4. Accessories
Power Supply 8V, 0.75A; Temperature probe, SP02 probe, cuff
with hose.

5. Basic PM Procedure

5.1. Physical Inspection

If necessary, wipe down with a weak disinfectant or a 5-10% bleach solution (careful around the
buttons). If the buttons have impaired movement due to contamination, the button case holes
can be cleaned after the front panel PC boards are temporarily removed.

Check case, power cord, accessory cords, and hoses for integrity. Battery is adequately charged
when charging icon no longer flashes. If the battery measures less than 6V after an 8 hour
charge, replacement is due.

5.2. Time and Date Check/Change

Initiate the monitor’s internal configuration settings menu by powering on the unit while
pressing and holding the <Start> button. The first message displayed is the revision level of the
internal software. Press the <Review> button four times to advance to the Date Set screen. The
year, month, and day will appear in the systolic, diastolic and heart rate displays respectively.
Use the <Select Alarm> button to select the date item to be changed. When selected, the date
item will flash. Use the <SET> buttons (arrow up or arrow down) to change the selected date
item.
After making all the desired date changes, press the <REVIEW> button to save the changes and
advance to the Time Set Screen.

5.3. SpO2 Functional Check (if supplied).

Use SpO2 simulator to check the SpO2 functionality (including heart rate). Otherwise, the
average healthy person will normally measure in the high 90’s as a reference. Also, note that the
heart rate display section correctly indicates the subject’s heart rate.

5.4. Temperature Calibration Check

Use the 9600 Plus Calibration Tester to check the SureTemp thermometer accuracy. If this
calibrator is not available, you may use a subject of known body temperature as a check.

Note: To change from C to F or vice versa, enter into the Setup/Configuration mode as described above. Hit
<Review> until the temperature display shows three dashes “---“. Hit either <Set> button to change this unit of
measure. Finally, hit <Review> to save changes and then turn unit off.

An alternate reference is a glass of lukewarm water with a known temperature between 90 and
104 degrees F. Monitor results can be checked in either the Normal mode or the Monitor mode.
If the temperature is in Normal mode, the user can easily switch to Monitor mode without
entering the Monitor's internal configuration mode. To do this, remove the probe from the probe
holder in the main unit, attach a new probe cover, and wait one minute (do not place probe
anywhere at this time). After one minute the Monitor will automatically switch to temperature
Monitor mode, and the green "Monitor Mode" display will be illuminated on the temperature
display. After the probe is replaced in the holder, the Monitor will revert back to Normal
temperature mode.

5.5. NIBP Check

Use a Simulator if available to check
performance. If not available, verify the
pressure accuracy and non-leak integrity of the
unit as detailed in step “Pressure Accuracy”
below. Then perform a routine automatic
NIBP check on a human subject to verify
pumping and valve bleed functionality.

5.6. Pressure Accuracy

Enter the internal configuration mode by
pressing and holding the <Power> and <Start>
buttons simultaneously. When the display is
settled, Hit <Review> until “CAL” appears in
the Diastolic window. Then press the <Start>
button to close the device’s internal valve,
which allows application of an external
pressure. Connect the monitor as shown to a calibrated pressure meter. Use a fixed volume or a
C blood pressure cuff wrapped around a cylinder for the stabilization volume (100cc
recommended). Be sure this setup is leak-free before proceeding. Small leaks (usually in the
hose and cuff but sometimes internal) can confuse program computations.

Note: Leak Check When pressurized, the unit should not leak more than 5mmHg/15secs when attached to a
100cc cylinder at 245 – 255 mmHg; per Service Manual.

Pressurize to slightly above 250 mmHg. Slowly bleed the pressure to approximately 250
mmHg, clamp, and record the pressure reading and the measurement standard. Repeat this step
for 150 and 50 mmHg (approximate). If the differences between Vital Signs and the pressure
measurement standard are within ±3 mmHg at all specified pressures, then the device is within