Welch Allyn 4200B, Directions For Use Manual, Page: 48 / 74

40 Welch Allyn Spot Vital Signs
Table 7. No Blood Pressure Cuff Inflation
Possible Cause Explanation and Corrective Action
Connections between device and blood
pressure cuff loose Check all connections (do not overtighten).
Table 8. Temperature Malfunction
Possible Cause Explanation Corrective Action
Error code displayed Broken probe Replace probe. Consult Service Manual. Notify biomedical
department or Welch Allyn Technical Support.
Low temperature
readings Improper probe
placement Place probe in most posterior sublingual pocket when in
Oral Mode. Verify patient has had nothing to eat or drink
for 20 minutes.
No temperature displayed Probe not replaced Replace probe in holder prior to taking another
temperature.
Table 9. SpO
2
Malfunction
Possible Cause Corrective Action
Sensor in place but no SpO
2
on
display
Insert the patient’s finger completely into sensor.
Verify blood pressure and SpO
2
measurements are not taken on the same extremity.
Verify the sensor cable is correctly plugged into device.
Verify you are using the correct sensor. Use only Masimo or Nellcor SpO
2
sensors
and accessories with the Welch Allyn Spot Vital Signs with Masimo or Nellcor
configurations, respectively.
Table 10. Device Does Not Turn On
Possible Cause Explanation and Corrective Action
Low battery Check connections between device and transformer, and transformer and wall
receptacle.
Device not powering up Unplug unit from wall receptacle and check for breaks in cord. If connections are
secure, check electrical outlet.
Charging indicator is on if connections are good and the device is plugged into a
working outlet.
Notify biomedical department or Welch Allyn Technical Support.
Table 11. Blood Pressure Cuff Too Tight (Over Inflation)
Possible Cause Explanation and Corrective Action
Pressure preset too high Check default Pressure Preset setting in internal configuration mode. Unless patient
has underlying systolic hypertension, set pressure preset at 160 mmHg. (If systolic
blood pressure greater than pressure preset, the device automatically increases an
additional 40 mmHg.)