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5.2.1.2.
Charging batteries
The rechargeable battery can only be charged at an ambient
temperature of ±0...+35 °C. If the battery has been discharged
completely, the charging time at room temperature is approx. 5-6
hrs.
Charging in the measuring instrument
1. Connect the plug of the mains unit to the mains unit socket on
the measuring instrument.
2. Connect the mains plug of the mains unit to a mains socket.
-
The charging process will start. The charge condition will be
shown in the display. The charging process will stop
automatically when the battery is fully charged.
Charging in the charging station (0554 1087)
> Refer to the documentation enclosed with the charging station.
Battery care
> Do not fully exhaust rechargeable batteries.
> Store rechargeable batteries only in charged condition and at
low temperatures, but not below 0 °C (best storage conditions
with a charge level of 50-80 %, at an ambient temperature of
10-20 °C, recharge completely before use).
> For longer breaks you should discharge and recharge the
batteries every 3- months. Trickle charging should not exceed 2
days.
5.2.1.3.
Mains operation
1. Connect the plug of the mains unit to the mains unit socket on
the measuring instrument.
2. Connect the mains plug of the mains unit to a mains socket.
-
The measuring instrument is powered by the mains unit.
-
If the measuring instrument is switched off and a rechargeable
battery is inserted, the charging process will start automatically.
Switching the measuring instrument on has the effect of
stopping battery charging and the measuring instrument is then
powered via the mains unit.
For longer measurements that are mains-operated, Testo
recommends using a combustion air temperature probe
with connecting cable. Self-heating of the instrument
during mains operation may influence the combustion air
temperature measurement with a mini ambient air probe.
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5 First steps
29
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