Users’ Guide for Earth Ground Resistance Tester
Operation Instructions
4.5 Data Reading
Data reading function of the meter allows you to check the historical measurement stored in the meter.
（1）When the meter is standing by, press MEMO to call the display for data storage, with “MEMO” glittering at the
lower right corner of LCD; should the existing memory has been used for storage of other data, “USED” would be
shown on LCD when pressing MEMO to exit data storage.
（2）Press “ENTER” briefly to switch A bit of a memory position and 10-bit and the memory position can be scanned by
pressing “
”or“ ”.
（3）Press “ENTER” for 2 seconds to read a group of data in a memory if there are data stored before in the memory
4.6 REL—Relative Measurement
Relative measurement can be accessible only when the tester is used for measurement of earth resistance. Press REL to
switch the relative measurement mode with the normal one or vice versa.
（1）Under relative measurement mode, the symbol “REL” is shown on LCD and the existing reading is stored in the
memory for future reference. In the following relative measurement, what the LCD displays is the differenc e between the
input value and the reference value, that is, existing reading=input value-reference value
（ 2 ） Under normal measurement of earth resistance, it is not allowed to enter REL mode when the measurement is
progressing.
（3）It is not allowed to enter REL mode when the data is being read or stored.
（4）It is not allowed to enter REL mode when the existing reading exceeds the limit.
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