5.2.
MEASURING CURRENT
(AC and DC)
5.2.1. Connect the black test lead to the COM input socket (fig.1.10) and the red test lead to the mA input socket (fig.1.9) for measuring up
to 400mA .
5.2.2. For values up to 5A, plug the red lead into the 5A socket (fig1.8).
5.2.3. Press FUNC to scroll between AC and DC measurements
5.2.4. Set the rotary switch to the required either the 400mA or A range and connect the test probes in series with the load being
measured.
5.2.5. Press FUNC to scroll between AC and DC measurements.
5.2.6. The measured value will be displayed (the polarity of the red lead will also be displayed; ' - ' denoting negative).
5.3.
MEASURING RESISTANCE
5.3.1. Connect the black lead to the COM input socket (fig1.10) and the red (+) test lead to the the
Ω
input socket (fig.1.11).
WARNING!
When checking in-circuit resistance, ensure that the circuit under test has all power removed and all capacitors have been
discharged fully before testing.
5.3.2. Set the rotary selector to the
Ω
position and use the FUNC key to scroll to
Ω
. Connect the test probes across the resistance being
measured.
5.3.3. The measured value will be displayed. OL indicates that a higher measurement scale should be selected.
5.3.4. When measuring resistance over 1M
Ω
, the meter may take a few seconds to get a stable reading. This is normal for high resistance
measurements.
5.4.
MEASURING CAPACITANCE
WARNING!
Ensure that capacitors have been discharged fully before testing to minimise the risk of electric shock.
5.4.1. Connect the black test lead the COM input socket (fig.1.10) and the red (+) lead to the socket (fig.1.11).
5.4.2. Set the rotary selector to the position and use the FUNC button to scroll through to the mF setting.
5.4.3. The measured value will be displayed.
5.4.4. When measuring high capacitance devices, the meter will take a certain time (e.g: 30 seconds for 200
μ
F) to settle.
5.4.5. If a false reading appears when the circuit is open, press REL to zero the display.
5.5.
DIODE TESTING
5.5.1. Connect the black lead to the COM input socket (fig.1.10) and the red (+) lead to the input socket (fig.1.11).
5.5.2. Set the rotary switch to the position and scroll through until is displayed.
5.5.3. Connect the red lead to the anode and the black lead to the cathode of the diode under test. If the leads are cross connected, OL will
display.
5.5.3. The meter will show the approximate forward voltage drop of the diode in V.
5.6. AUDIBLE CONTINUITY TEST
WARNING!
Ensure that the circuit to be tested is powered down and that any capacitors have been discharged
5.6.1. Connect the black lead to the COM input socket (fig.1.10) and the red (+) lead to the
Ω
input socket (fig1.11).
5.6.2. Set the rotary switch to the position and connect the test leads across the two points of the circuit under test.
5.6.3. If continuity exists (i.e. resistance is less than about 40
Ω
), the built-in buzzer will sound.
5.7.
FREQUENCY MEASUREMENT
5.7.1.
Connect the black lead with the COM input socket (fig.1.10) and the red (+) lead with the Hz socket (fig.1.11)
5.7.2. Turn the rotary selector to the Hz position, or press the 'Hz/DUTY' button when measuring V AC or V DC.
5.7.3. Connect he test leads across the power source.
5.7.4. The frequency will be displayed in Hz.
5.8.
DUTY CYCLE MEASUREMENT
5.8.1. Connect the black lead with the COM input socket (fig.1.10) and the red (+) lead with the Hz socket (fig.1.11).
5.8.2. Turn the rotary selector to the Hz position
5.8.3. Press the Hz/DUTY button to select DUTY, or press the Hz/DUTY button when measuring V AC or V DC.
5.8.4. The duty cycle will be displayed as a % figure, representing % of time 'on'.
5.9.
MEASURING TEMPERATURE
5.9.1. Ambient temperature may be measured by setting the rotary selector to the ° C position.
5.9.2. The ambient temperature will be displayed in °C.
5.9.3. To measure surface temperature: insert the red lead of the thermocouple into the °C input socket (fig.1.9) and the black lead into the
COM input socket (fig.1.10)
5.9.4. Set the rotary selector to the
°
C position.
5.9.5. Touch the object to be measured with the thermocouple probe and the ambient temperature will be displayed.
WARNING!
To avoid electric shock, do not place thermocouple in contact with live components.
5.10 MEASURING RELATIVE HUMIDITY
WARNING
Remove test leads before using this function.
5.10.1. Move the rotary selector to the %RH position.
5.10.2. Ambient relative humidity will be displayed as %RH.
NOTE:
it will take some time for the %RH display to settle in conditions of humidity which are charging rapidly.
5.11. MEASURING SOUND LEVEL (dB)
WARNING
Remove test leads before using this function.
5.11.1. Turn the rotary selector to the dB position.
5.11.2. Point the sensor (located in the end of the unit) towards the sound source to be measured.
5.11.3. The value will be displayed in dB.
NOTE:
Using the sound meter in strong winds will affect the readings. A screen should be used to shield the sensor from buffeting.
5.12. LUMINANCE MEASUREMENT
WARNING
Remove test leads before using this function.
5.12.1. Turn the rotary selector to the Lux or x10Lux setting, depending on the brightness of the light source.
5.12.2. The luminance will be displayed in Lux or x10Lux.
5.12.3. If 'OL' appears, change the setting to the x10Lux scale.
Original Language Version
© Jack Sealey Limited
TM104 Issue No: 1 10/06/15
