10
Continuity measurement
To test continuity, perform the following steps:
•
Insert the red test probe into the VΩmA terminal and the black test probe into the
COM terminal.
•
Turn the range selector to
range.
•
Connect the test probes to the circuit to be measured. The buzzer beeps if the
circuit resistance is less than 100Ω. If the display shows “OL”, this indicates the
open circuit.
Temperature measurement (Model 72-10420A only, see figure 8)
The temperature measurement range is -40°C - 1000°C.
To measure temperature, perform the following steps:
•
Insert the output ports (anode and cathode) of the temperature probe respectively
into VΩmA°C /°F and COM terminals.
•
Turn the range selector to °C / °F range.
•
Place the temperature measuring end of the
temperature probe on the surface of or in the
object to be measured. The measured value will be
shown on the display.
Notes:
•
The inside meter temperature will be automatically
displayed when there is no temperature probe
connected.
•
The point contact temperature probe attached
to the meter can only measure temperature
lower than 250°C. When higher temperature
measurement is needed, please use other su
itable temperature probe.
Square wave output (Model 72-7770A only)
To avoid meter damage, do not connect the output terminal (red test probe) to the
circuit with voltage higher than 10V.
To measure square wave output, perform the following steps:
•
Turn the range selector to
OUT range.
•
The meter outputs s
quare wave signal between VΩmA and COM Terminals.
Notes:
•
The frequency is about 50Hz.
•
The output amplitude is >2.3Vpp when the meter is connected to the circuit with
1MΩ resistance.
•
When measurement is completed, disconnect the test probes from the circuit under
test.
