Welch Allyn Vital Signs Monitor - User Manual - Manual (Page 57)

Vital Signs Monitor 51
If the Vital Signs Monitor is out of calibration, it needs re-calibration. Calibration procedures are
included in the Vital Signs Monitor Service Manual. Alternatively, send the device back to Welch
Allyn for calibration by contacting Technical Service.
NOTE: The pass/fail criteria for the blood pressure calibration check depends upon the accuracy of
the pressure measurement standard used. For example:
•
If the pressure measurement standard used is rated with an accuracy of ±0.1 mmHg, the pass/
fail criteria is ±2.9 mmHg in order to guarantee that the instrument under test is within ±3
mmHg of NIST.
• If the pressure measurement standard used is rated with an accuracy of ±1.0 mmHg, the pass/
fail criteria is ±2.0 mmHg in order to guarantee that the instrument under test is within ±3
mmHg of NIST.
Welch Allyn recommends using a pressure meter that is as accurate as possible when performing
calibration checks. Welch Allyn offers two different pressure measurement standards for use:
•
Setra Pressure Meter, calibrated accuracy of ±0.1 mmHg (part no. 2270-01)
• Netech Pressure Meter, calibrated accuracy of ±1.0 mmHg (part no. 200-2000IN)
Use of other pressure measurement standards is acceptable, provided they have an accuracy of bet-
ter than ±3 mmHg, are traceable to NIST, and have a current calibration.
NOTE: Do not take more than 3 minutes to take the readings, as the Vital Signs Monitor will open
its pressure relief valve as a safety feature. If this occurs, turn the device off and start over.
NOTE: The Vital Signs Monitor has the option to measure pressure in kPa units. If the device is set
to kPa instead of mmHg, temporarily set the device to mmHg units or convert all pressures to kPa
units.
Temperature Calibration Check
The accuracy of the Welch Allyn Vital Signs Monitor temperature determinations can be verified
using the Temperature Calibration Key. The calibration check is a simple yet valuable test to deter-
mine that the unit is measuring temperature accurately.
1. Turn the Monitor on by pressing the POWER button.
NOTE: The temperature function will automatically go into Monitor Mode as part of this
procedure.
2. Remove the temperature probe completely from the holder and detach the connector, then
insert the temperature calibration key.
3. Insert, then remove the probe from the probe holder to reset the thermometer.
4. Wait for the temperture display test to be complete. Observe and record the temperture noted
on the temperature display.
5. The recorded temperature should be 97.3°F ± 0.2°F (36.3°C +/- 0.1° C) if the Monitor is properly
calibrated. If the temperature displayed is out of this range, call your Welch Allyn Technical
Service center for assistance.