11
oPeRaTIon
The normal operation mode of PM1904 is always on. This
provides continuous monitoring and correct measuring of the
Dose equivalent of gamma radiation and provides accurate
readings and measuring of background radiation. When the
instrument is charged and operates normally, the green leD light
flashes every 10 seconds.
If the light does not flash green, but instead flashes orange, the
battery is partially discharged. If there is no light indication on the
leD the battery is critically discharged. Please charge the battery
of PM1904 following the procedure described below.noTe!
Before the first use, please allow the battery to be fully charged in a
USB port for at least 4 hours.
PM1904 detector geometrical center
