Resistance Measurements; Continuity Testing; Diode Testing - PeakTech 1655 Manual De Instrucciones

6.3. Resistance measurements

WARNING! Attempting resistance or continuity measurements on live circuits can cause electric
shock, damage to the instrument and damage to the equipment under test.
Resistance measurements must be made on de-energized (DEAD) circuits only for maximum
personal safety. The electronic overload protection installed in this instrument will reduce the
possibility of damage to the instrument bus not necessarily avoid all damage or shock hazard.
1. Turn off any power to the resistor to be measured. Discharge capacitors. Any voltage present
during a resistance measurement will cause inaccurate readings and could damage the meter
if exceeding the overload protection of 1000 V DC or AC.
2. Insert the black test leads into the COM and the red test lead into the V//CAP/
terminals respectively.
3. Select the desired ohm () range.
4. Connect the black and red test probe tips to the circuit or device under test, making sure it is
de-energized first.
5. Open circuits will be displayed as an overload OL condition.
6. Test lead resistance can interfere when measuring low resistance readings and should be
subtracted from resistance measurements for accuracy. Select lowest resistance range and
make the test leads short together.
The display value is the test lead resistance to be subtracted.
7. After completing measurement, disconnect the test leads.

6.4. Continuity testing

1. Set the rotary switch to the  position
2. Select the . ))) function by pressing the MODE-button.
3. Follow step 2 and 4; as for resistance measurements.
4. An audible tone will sound for resistance less than approx. 50 . After all measurements are
completed, disconnect the test leads from the circuit and from the input terminals.

6.5. Diode testing

CAUTION! Measurements must only be made with the circuit power OFF.
1. Set the rotary switch to the  position.
2. Select the function by pressing MODE-button.
3. Follow steps 2 and 4 as for resistance measurements.
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