
DL9120 / DL9130
Operating Instructions
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and hold the Lead Zero (F3). The measured resistance of the test leads
is shown in the primary display until a beep is heard and the Lead Zero
icon is shown on the display. All subsequent measurements will
automatically include compensation for the test lead resistance. To
disable the function, remove the leads from the load to measure open
circuit, press and hold F3.
Note: A maximum test lead resistance of 10 ohms can nulled out. If
the test lead resistance is greater than 10 ohms an error beep
will indicate that the Lead Zero function has failed, and the
display icon will not be shown.
Note: For ease of use, the DL9120 / DL9130EV will store the Lead
Zero compensation when switched off and recall this value
when next switched on. The stored value is only applicable to
the test leads used when the compensation measurement was
made. If the test leads are replaced the Lead Zero function
should be repeated using the replacement test leads.
200mA / 15mA Test Current (F4, DL9130EV only)
The DL9130EV can perform Continuity tests at both 200mA and 15mA.
To switch between the currents the test probes must be open circuit.
Press F4 until the required test current is displayed.
The DL9120 can only perform tests at 200mA.
TEST
The Continuity test does respond to the TEST key or Remote probe
button, the test will automatically start when a low resistance is detected.
5.4 Insulation Resistance Tests
Always ensure that the circuit under test is electrically
isolated.
Should a voltage of >30V be applied to the DL9120 /
DL9130EV while in Insulation mode the DL9120 /
DL9130EV will enter Voltage mode until the voltage is
removed.
If the test probes are connected across a voltage of >30V
then the DL9120 / DL9130EV will automatically display the
voltage between the probes, the warning buzzer will sound
and the TEST key is inhibited.