Instruction Manual Dräger P7-TDX
45
19. High performance rechargeable battery
19.1 General information regarding the power supply
A high performance rechargeable nickel metal hydride battery installed in the measuring
device enables network-independent operation. The operating time with a fully charged
battery is normally more than 8 hours; however, this can vary depending on the type of
measurements.
Measurements can be continued during the charging process.
The plug-in charger is called the Dräger P7/EM200.
19.2 Charging the battery
The capacity of the battery is monitored by the measuring device and shown on the dis-
play. The battery symbol on the display indicates the charge state. The red LED on the top
of the device blinks when the battery is empty. The device should be charged now. Only
charge the measuring device using the corresponding plug-in charger. We recommend
monthly recharging in the event of longer periods of non-use. The plug-in charger is de-
signed to operate at 100 - 240 V AC. For safety reasons, the condition of the charger
should be checked regularly for damage.
The charging process takes 1 - 4 hours, depending on the charge state. The red LED on
the top of the device is on during the charging process. At the beginning of the charging
process a green blinking indicates that the battery and the charging system are being
checked. The blinking changes to a continuously lit green light at the end of the charging
process. This means that the battery is now being powered with a trickle charge current.
If the charging connection detects an error, for instance battery temperature too high or too
low, the LED blinks in a mixture of red/green. In this case, please wait for approx. ½ an
hour and then, restart the charging process. The measuring device can only be charged at
ambient temperatures between 5 °C and 35 °C. Charging or storage in direct sunlight must
be avoided.
If the battery is not charged, it will shut off automatically. If the measuring device can no
longer be switched on due to low voltage, the plug-in charger must be connected and the
device must be switched on again!
Total discharge of the battery should be avoided, for this can shorten the life of the battery.
The battery should be charged after each time the measuring device is used.
