Welch Allyn 9600 Plus Mode D'emploi page 38

30 Chapter 4 Maintenance
Environmental Checks
1. Verify that there is no excessive moisture or steam in the air.
High humidity (above 90%) can cause electrical leakages that
can temporarily shift the device out of calibration. If the
thermometers and/or the 9600 Plus Calibration Tester are
exposed to such conditions, allow each device to sit at normal
room temperature and humidity for at least 30 minutes before
conducting a calibration test.
2. Avoid exposure to extreme temperatures. Thermal gradients
in the thermometer or the 9600 Plus Calibration Tester can
cause unpredictable effects. Verify the 9600 Plus Calibration
Tester is within the specified ambient temperature range of
18.3° C (65.0° F) to 26.7° C (80.0° F). Verify the ambient room
temperature is stable and their are no drafts around the 9600
Plus Calibration Tester.
Welch Allyn 9600 Plus Calibration Tester