MI 3311 GammaPAT
General description
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1.2 Battery and charging
The instrument uses six AA size alkaline or rechargeable Ni-Cd or Ni-MH battery cells.
Battery condition is always displayed in the upper right corner of the display.
If the battery power becomes too weak, the instrument indicates this as shown in figure
1.1. This indication appears for a few seconds and then the instrument turns itself off.
Figure 1.1: Discharged battery indication
Whenever the power supply adapter is connected, the instrument will automatically start
charging the batteries. The power supply socket polarity is shown in figure 1.2. The
instruments internal circuitry controls the charging and to ensure maximum battery life.
+
-
Figure 1.2: Power supply socket polarity
Symbols:
Indication of battery charging
Figure 1.3: Charging indication on display
Before opening the battery compartment cover, disconnect all
accessories connected to the instrument and switch off the instrument.
Ensure that the battery cells are inserted correctly otherwise the instrument will not
operate and the batteries could be discharged.
If the instrument is not to be used for a long period of time, remove all batteries from
the battery compartment.
Alkaline or rechargeable Ni-Cd or Ni-MH batteries (size AA) can be used. Metrel
recommends only using rechargeable batteries with a capacity of 2100mAh or
higher.
Do not recharge alkaline battery cells!
Use only power supply adapters delivered from the manufacturer or distributor of
the test equipment to avoid possible fire or electric shock! Maximum short-term
voltage of external power supply adapter is 14 V!
