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User's Manual
2. Pressing the [ ] or [ ] key to select Ext1, Ext2 or OFF. When the Ext1 is selected, the screen
displays the icon EXT1; when the Ext2 is selected, the screen displays the icon EXT2; when OFF
is selected, it indicates that the current sensor input is disabled, and the signal collected from
the current input terminal is used as the current input signal.
3. Using the [▲] or [▼] key to select other setting option or pressing the [ESC] key to go back to
the measurement interface.
6.3.2 Ext1 Ratio (mV/A)
Setting Steps
1.
Using the [▲] or [▼] key in the EXT menu to select "Ext1 Ratio (mV/A)" (the option is fill with red
shading which means it is selected).
2. Pressing the [ ] or [ ] key to select the data bit to be edited.
3. Rotating the encoder knob to increase or decrease the numerical value, the range is 0000.001～
9999.999.
4. Using the [▲] or [▼] key to select other setting option or pressing the [ESC] key to go back to
the measurement interface.
5.
6.3.3 Ext2 Ratio (mV/A)
Setting Steps
1.
Using the [▲] or [▼] key in the EXT menu to select "Ext2 Ratio (mV/A)" (the option is fill with red
shading which means it is selected).
2. Pressing the [ ] or [ ] key to select the data bit to be edited.
3. Rotating the encoder knob to increase or decrease the numerical value, the range is 0000.001～
9999.999.
4. Using the [▲] or [▼] key to select other setting option or pressing the [ESC] key to go back to
the measurement interface.
·Explanations
The coefficients of the sensors mentioned in this subsection is corresponding to the variable ratio of
the external sensor.
Application Example 1
Using the AC current clamp CTS5 of ZLG brand to measure the current signal of 30A, CTS5 ratio is
10mV/A (that is, 1A current signal can be converted to 10mV voltage signal). Using CTS5 to measure the
30A current will be output 300mV voltage, so the sensor channel (Ext Sensor CH) should select Ext2. The
current range select to Auto or 500mV is more appropriate, the sensor coefficient Ext2 Ratio (mV / A) is
set to "0010.000", that is, 10mV/A, connecting the BNC interface of the current clamp to the instrument's
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