Checking Continuity
Continuity testing verifies that circuit connections are intact. To perform audible continuity tests, set the rotary switch
to
(
(
(o)
)
)
Ω
press the DC/AC
(
(
(o)
)
)
button to toggle between resistance and continuity, and connect the meter to your
circuit.
Warning:
Never perform a continuity measurement on a circuit that has power connected.
Note:
The buzzer sounds if the measured resistance is below 30 ohms.
Logic Test
The logic function lets you easily check the digital circuits to determine the logic state of different parts of the circuit.
Rather than display an absolute voltage, this function displays Hi, LO, or ---- indicated logic high, low, or undeter-
mined respectively.
Follow these steps to perform logic test:
1.
Rotate the function selector to the LOGIC range.
2.
Plug the back probe into your meter's COM terminal and the red probe into your meter's V/
Ω
terminal.
3.
Connect the black probe to the ground point (GND) of the test circuit and the red probe to the supplying
voltage point (V+). While keeping the test probes firmly connected to each point, press SET/RESET key.
4.
While keeping a connection between the black probe and the circuit's GND point, move the red probe to
the other desired points. The meter immediately displays one of the 3 modes, as follows:
-
If value exceeds 70 % of the stored (V+) value,
Hi
(HIGH) appears
-
If value falls below 30 % of the stored (V+) value,
LO
(LOW) appears
-
If value is between 30 % and 70 %, the segment ---- appears.
Notes:
•
In this mode, the data-hold and Max/Min-Hold functions do not work.
•
The supplying voltage above 3 V for setting the reference value and from 0 V up to 39.99 V is limited for testing a
logic.
•
After performing logic test, you must press set/reset button before rotating the range selector to another range.
Measuring Inductance
Your meter can measure coils up to 400 mH. Follow these steps to measure inductance.
1.
Rotate the function selector switch to 400 mH
2.
Insert the discharged coil into the outermost connections and read the display.
Notes
•
When the input is not connected, i. e. at an open circuit, OL is displayed to indicate an overrange condition.
•
Please refer to a test condition as below. If OL is not displayed at open status, press DC
Ω
/AC (
(
(o)
)
) so your meter
displays OL
Refer
Refer to reading error as specified at special characteristics.
- 35 -
Test Condition
Frequency = 550 Hz (Square Wave)
Internal Series Resistance Error
400 mH RS= 4.7 k
Ω
Internal Resistance
Error
(%)
R(s) 400
mH
Ohm Error
(%)
0,1
-0.1
0,2
-0.1
0,5
-0.1
1
-0.1
2
-0.1
5
-0.1
10
-0.2
20
-0.4
50
-1
100
-2
200
-4
500
-10
1000 -17
