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contents of the internal memory of the instrument, including name of the stored files, size, total
disk capacity and remaining available storage space.
(
电能质量测试仪：
power quality analyzer
文件夹列表：
folder list
无文件
夹：
No folders
记录文件夹列表：
record folder list
按【退出】返回
主菜单：
press[quit]back to main menu)
13. "System Calibration" Interface
Not available for users, omit.
V Usage
The instrument is equipped with a four-core voltage testing line and three current test clamps
(can be equipped to six as required). Voltage test lead is used to access to the measured voltage
signal. When testing with current clamp in the field, each current clamp corresponds to a clamp
connector, non interchangeable, otherwise it will affect test accuracy. There’s a roundel sticker in
the middle of each clamp, exhibiting phase and polarity of the clamp (The superscript N end is
current outflow end. Pay attention to the polarity on use of wiring, because reversal would affect
the test results).
Should be noted during the testing:
1. Intercalate the current test clamp before testing. Clip testing signal before intercalating the
current test clamp is strictly prohibited. It’s equivalent to open circuit on the secondary side of
current test clamp, which is prone to a high-pressure of open circuit and damage the instrument.
Take off all current test clamp and then unplug connected to the host after the test is completed.
2. To ensure the accuracy of each channel, the test clamp should be one-to-one correspondence,
which means properly inserting each current clamp to the corresponding outlet. Exchanging
different input socket will reduce accuracy of the test, but it generally does not exceed the
measurement accuracy of ± 2% after crossing.
3. The test line must access to the voltage terminal of the instrument when accessing to the
voltage signal, and then access to the voltage terminal of the device under test; You must
