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ppb<strong>RAE</strong> <strong>3000</strong> User’s <strong>Guide</strong>When you have completed your selections, press [MODE]. You willsee two choices: Save and Undo. You have the opportunity to registerthe new settings or to change your mind and revert to your previoussettings.• Press [Y/+] to save the changes.• Press [N/-] to undo the changes and revert to the previoussettings.STEL AlarmYou can change the STEL Alarm limit value. The value is typicallyset by the instrument to match the value for the calibration gas. It isexpressed in parts per billion (ppb). Note: The default value dependson the measurement gas.To change the STEL Alarm value:1. Press [Y/+] to increase each digit’s value.2. Press [N/-] to advance to the next digit.3. Again, use [Y/+] to increase the number.Repeat this process until all numbers are entered.When you have completed your selections, press [MODE]. You willsee two choices: Save and Undo. You have the opportunity to registerthe new settings or to change your mind and revert to your previoussettings.• Press [Y/+] to save the changes.• Press [N/-] to undo the changes and revert to the previoussettings.57
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