Техническая Спецификация для SOEKS IMPULSE Magnetic field-analysis apparatus, Magnetic field tester 9

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Power
 
At the back side of the device there is the cover of the battery 
section. NiMH accumulators or ААА (LR03) type batteries can be used to 
power the instrument. Two identical batteries should be installed in the 
instrument at a time. 
 
The bottom of the battery section shows the manufacturer’s 
trademark - SOEKS - and board model.
 
The front side of the device has a mini-USB port that can be used 
to recharge batteries from a computer via a USB-mini-USB cable or from the 
power mains. If connected to a PC or electric mains, the device can work 
without power elements.
How to install power elements
• In order to avoid instrument breakage, strictly observe polarity when you 
install batteries.
• Make sure, that battery type correspond to the parameter settings in the 
"Power" section (page 36)
• When the device is turned off, you can leave the power elements installed – 
the batteries and accumulators are not spent if the device is in standby mode.
• If you expect not to use the device for a long time, it is recommended to 
remove the power elements after the device is turned off.
External charger usage
 
When using accumulators, they can be recharged by means of 
external charger (EC). Any standard power adapter with the output voltage of 
5 V +/- 10 % providing the output current of 500 mA through MiniUSB-B 
connector can be used as a charger.
 
Upon connection of the charger the instrument is switched on 
automatically; screen illumination remains switched on permanently; 
measurement accuracy decreases, and therefore only "View" measurement 
mode is available; a switched on instrument cannot be switched off neither 
by button nor automatically.
 
When connected to a charger, the accumulators are recharged 
automatically.