14.1 POWERING OF THE INSTRUMENT
SVAN 977A can be powered by one of the following sources:
• Four AA standard size internal batteries. In case of alkaline type, with a new fully charged set, the
instrument can operate more than 12 h (6.0 V / 1.6 Ah). Instead of the ordinary alkaline cells, four AA
rechargeable batteries can be used (a separate external charger is required for charging them). In this
case, using the best NiMH type, the operation time can be increased up to 16 h (4.8 V / 2.6 Ah)
• External DC power source – 7 V DC÷16 V DC (1.5 W)
• SA 17A external battery pack – operation time > 24 h (option)
• USB interface – 500 mA HUB
SVAN 977A is delivered with four AA alkaline batteries, but you may also use AA rechargeable batteries.
The “battery” icon shows the condition of the internal batteries.
The instrument is not equipped with an internal charger; therefore, the rechargeable batteries can be charged
only with the use of optionally provided charger (SA 31) after removal them out of the instrument.
To change or charge the batteries, switch off
the instrument, unscrew coin-operated screw,
take off the black bottom cover of the
instrument and slide the battery tubes out.
Note: While changing the batteries, observe the correct polarity.
Powering the instrument from the USB interface is performed by connecting its
USB socket to the PC or other USB power source via the SC 16 cable.
Powering the instrument from the external 6 x AA battery pack (SA 17A) or DC
power source 7 V DC÷16 V DC, 1.5 W (SA 15) is performed via 7–16 V socket.
When the instrument is powered from the external power source the internal batteries are automatically
disconnected. After disconnection from the external power source, the instrument will automatically switch
powering to the internal batteries.
Note: Use only high-quality USB cables, such as SC 16. Many poor-quality cables do not ensure low
resistance of the cable, thus disabling proper operating of the instrument.
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