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                     If you have a Series 500 or 300 monitor: 
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                     Press the ENTER button and select MONITOR SETUP from the main menu. 
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                     Select UNITS from the secondary menu. 
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                     If you have a Series 200, press the ENTER button and select UNITS from the main menu. 
 
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                     Use the UP/DOWN buttons to change the units for your particular sensor: 
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                     ppm or mg/m3 for a gas sensor. 
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                     °C or °F for a temperature and relative humidity sensor. 
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                     mg/m3 is the only option for a PM sensor. 
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                     To learn about the ppm to mg/m3 conversion factor for each sensor head, read here. 
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                     Press ENTER to confirm. 
 
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For further support, contact Technical Support.
For further support, contact Technical Support.
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