ADS Environmental Services Model 3600 530002 A2 - Manual (Page 107)

Monitor Maintenance 6-5
Maintaining the EMU Batteries
If the monitor using internal batteries reports that the EMU batteries are low, you can
replace them (any field crew member can perform this procedure).
l Purchase six alkaline D-cell batteries from a local store.
l At the monitoring site, open the pavement box, and remove the lid from the
EMU.
l Replace the old batteries with the new ones following the polarity chart in the
battery holder.
l Replace the lid on the EMU and close the pavement box.
Note: Because a pavement box can be located in or near traffic, use all
necessary safety precautions when replacing EMU batteries.
If the monitor using an external power source reports that the EMU power is low, the
external power source has failed. When this condition is detected, only a few hours of
operation are available after power is lost depending on the site configuration.