4 Operate the Continuity Null (F1) button, this will null out the lead resistance
and the indicated reading should go to zero.
5 Release the test button. Press the test button and ensure the display reads
zero before proceeding. While using the Continuity null function, NULL
is displayed on the LCD as indicated in Fig.10. The null value will be stored
even if the instrument is powered off. This memorized null value can be
cancelled by disconnecting the test leads and pushing the Continuity Null
button (F1) with the test button pressed or locked. When this is cancelled
you will know because NULL OFF is displayed on the LCD.
CAUTION - before taking any measurements always check the leads have
been zeroed.
6 Connect the test leads to the circuit whose resistance is required (see
Fig.11 for a typical connection arrangement), having first made sure that
the circuit is not live. Note that Live Circuit warning will be displayed
on the LCD if the circuit is live - but check first anyway!
7 Press the test button and read the circuit resistance from the display.
The reading will have the test lead resistance already subtracted if the
Continuity null function has been used.
8 Note that if the circuit resistance is greater than 20Ω the instrument will
autorange to the 200Ω, if it is greater than 200Ω it will autorange to the
2000Ω range.
Note: If the reading is greater than 2000Ω the overange symbol >
will remain displayed.
The results of measurements can be adversely affected by impedances of
additional operating circuits connected in parallel or by transient currents.
Fig. 10
Continuity
To Next Page
Loading...
Need help?
General
