Service manual

32 Troubleshooting Welch Allyn Spot Vital Signs
No temperature displayed Probe not replaced Replace probe in holder prior to taking another
temperature.
Table 12. 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 13. 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 14. 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.)
Table 15. Blood Pressure Cuff Pops Off
Possible Cause Explanation and Corrective Action
Inappropriate blood pressure
cuff size
Determine blood pressure cuff size with the blood pressure cuff markings. If blood
pressure cuff continues to pop off, notify biomedical department or Welch Allyn
Technical Support.
Blood pressure cuff applied
inside out
Re-apply blood pressure cuff. Make sure Welch Allyn label is facing away from arm.
Table 16. Blood Pressure Cuff Deflating Too Slowly
Possible Cause Explanation and Corrective Action
Normal operation Typical time to take a reading is 20 to 45 seconds; 165 seconds is the maximum.
Pressure preset too high Check default pressure preset setting in internal configuration mode.
Patient movement Have patient sit still. Do not have arm tight against chest wall, as respiration may
affect speed and accuracy of blood pressure measurement.
Table 11. Temperature Malfunction
Possible Cause Explanation Corrective Action