工频电场近区场强仪操作前准备：必须要检查电源：开机后检查主机的欠电压警示灯，若警示灯亮起，则主机供电电池不足应及时充电，这点是首要的，必须要检查电源是否有足够的电，这会影响仪器的使用。场强仪开机后检查表头视窗左上角，如果显示BAT则表头供电电池不足应及时更换9v电池，电池是否充对场强仪的使用有很大的印象，所以一定要要在使用前检查清楚。

Preparation before operation of the power field near the field strength instrument: It is necessary to check the power supply: after the boot, the undervoltage warning light of the host is checked. If the warning light is on, the main power supply battery should be charged in time. This is the primary point. It is necessary to check whether the power supply has enough electricity, which will affect the use of the instrument. After the field strength meter is turned on, check the upper left corner of the table head window. If the BAT is displayed, the power supply battery of the table head should be replaced in time. Whether the battery is filled with the use of the field strength meter has a great impression, so it must be checked before use. clear.
 
 
 
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