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10. Continuity testing W
Continuity testing operates over the range 0.01 ohms to 999 kohms.
The MIT will auto-range across the full range from 0.01 ohm to 1 Mohm.
The analogue arc will auto range as below:
0 - 10 Ohm 0 - 100 Ohm
0 - 1000 Ohm 0 - 1000 kOhm
Test current automatically adjusts for the range selected by the instrument. Test currents adjust as below:
0.01 to 3.99 Ohms = 200 mA (or 20 mA depending on settings - see section 13 SETUP)
4.00 to 999 kOhms = 20 mA to 2µA
The test operates at 4.5Vdc and is a single polarity test by default, as below, but can be set to a bi-directional test in setup, see also
section 13 below.
ie Red terminal = 4.5 Vdc, Black terminal = 0 Vdc
The continuity test is automatic. The test starts on detection of a circuit of <1 Mohm.
10.1 Measurement for 2 terminal instruments and MIT2500
10.1.1 Continuity testing W
1. Connect test leads to the RED/BLACK test sockets on the instrument.
2. Select the W measurement mode using the range knob.
3. Connect the test leads to the circuit to be measured. The instrument will check for a live circuit prior to making a
measurement.
4. On circuits of less than 1.0 Mohm, measurement starts automatically. The display will show the continuity value in both the
analogue arc and large digital readout. The test current at which the measurement was made is displayed on the small digital
readout, as highlighted below:
z
k
100 0
8 00
6 004 00
2 00
0
W
W
Am
- Figure 33
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