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16
Operation
Continuity / resistance measurement
NOTE:
The continuity test will auto-range from 0.01 Ω to 99.9 kΩ. Circuits up to 2 Ω will be tested at >200 mA.
To change the test current refer to “Setup options” on page 26.
NOTE:
The continuity test is automatic. Testing starts as soon as the leads are connected to a circuit. The
TEST
button is ONLY used to null the lead set.
Warning:
Prior to any continuity testing, ensure the circuits under test are isolated and
not live.
SETUP allows the follow configuration options:
Positive test current
Bi-directional test current
Bi-directional test current allows the automatic testing of the circuit in both directions and the highest measured
value being displayed refer to “Setup options” on page 26.
Nulling test lead resistance (up to 9.99 ohms)
W
Before starting a continuity test, the test lead resistance should be nulled such that it does not add extra resistance
to the circuit being measured. Once nulled it does not need repeating for each test. Periodically it should be
checked to ensure nothing has changed.
The “Lead Null” value is retained even when the tester is switched off.
To null test leads:
Short test probes or clips together and press the
TEST
button. The null symbol
z
will be displayed to indicate
lead null is active.
Lead null OFF
This null value is stored until the
TEST
button is pressed again.
To cancel the LEAD NULL, separate the test leads and press the
TEST
button.
