1. General Specifications:
Maximum voltage including transient overvoltage between
any terminals and grounding:500V rms
Display: Maximum display 1999
Auto Polarity Display
Overloading : Display OL or - OL
Low Battery Indication : Display
Measurement Speed : Updates 3 times/second
Measuremnet Deviation: When the conductor being meaured
is not placed in a correct position
during AC current measurement,
current measurement, it will cause
±1% reading deviation.
To obtain accurate reading, measure only one conductor
at each time.
When current measurement has been completed, disconnect
the connection between the conductor under test and the
jaw, and remove the conductor away from the transformer
jaw of the Meter.
The buzzer beeps once when pressing any buttons at any
rotary switch positions except at 2/20A positions if the button
is valid. If the button is not valid, it does not beep. At 2/20A
rotary switch position, the buzzer is set not to beep.
The buzzer beep 5 times continuously on around 1 minute
before entering the sleep mode. When it is just before entering
the sleep mode, it will have one long beep to warn you.
The LCD displays OL indicating the circuit being tested
is open.
When continuity testing has been completed, disconnect
In a circuit, a good diode should still produce a forward
voltage drop reading of 0.5V to 0.8; however, the reverse
voltage drop reading can vary depending on the resistance
of other pathways between the probe tips.
Connect the test leads to the proper terminals as said
above to avoid error display.
The LCD will display OL indicating either open circuit or
wrong polarity connection.
The unit of diode is volt(V), displaying the forward voltage
drop readings.
Measuring the tested object that is already removed from
the in-line circuit can help to obtain a more accutate reading.
When diode testing has been completed, disconnect the
connection between the testing leads and the circuit under
test and remove testing leads from the input terminals.
If Ω reading with shorted test leads is not≤0.5Ω, check
for loose test leads, wrong function selected, or enabled
data hold function.
The LCD displays OL indicating open-circuit or the teste
resistor value is higher than the maximum range of the Meter
Resistance measurement is default to auto range mode.
Measuring the tested object that is already removed
from the in-line circuit can help to obtain a more accu-rate
reading.
When resistance measurement has been completed,
disconnect the connection between the testing leads and
the circuit under test and remove testing leads from the
input terminals.
(See Figure 8)
(See Figure 7)
F. Measuring Temperature
G. Measuring AC Current
D.Testing Diodes
(See Figure 6)
Warning
To avoid damages to the Meter or to the devices under
test, disconnect circuit power and discharge all the
high-voltage capacitors before testing diodes.
Use the diode test to check diodes, transistors, and other
semiconductor devices. The diode test sends a current
through the semicondutor junction, then measure the
voltage drop across the junction. A good silicon junction
drops between 0.5V and 0.8
V.
To test the diode out of a circuit, connect the Meter as
follows:
1. Insert the red test lead into the terminal and
V
the black test lead into the
COM
terminal.
2. Set the rotary switch to and press
SELECT
button
to select measurement mode.
red black
(
Figure
6)
then
Specifications
Maintenance
This section provides basic
maintenance information including
battery replacement instruction.
Warning
A. General Service
B. Replacing the Battery
(S
ee F
ig
u
r
e 10
)
Do not attempt to repair or service your Meter unless
you are qualified to do so and have the relevant calibration,
performance test, and service information. To avoid
electrical shock or damage to the Meter,do not get water
nside the case.
Periodically wipe the case
with a damp cloth and mild
detergent. Do not use abrasives or solvents.
T
o clean the terminals with cotton bar with detergent,
as dirt or moisture in the t
e
rminals can affect readings.
T
urn the Meter power off when it is not in use.
T
ake out the battery when it is not using for a long time.
Do not use or store the Meter in a place of humidity,
high temperature, explosive, inflammable and strong
magnetic field.
(
Figure
10)
Screw
Warning
To avoid false readings, which could lead to possible
electric shock or personal injury, replace the battery
as soon as the battery indicator “ ” appears.
Make sure the transformer jaw and the tets leads are
disconected from the circuit being tested before
opening the case bottom.
T
o replace the battery:.
1.T
urn the Meter off and remove all the connections
from the input terminals
2. T
urn the Meter’s case top down.
3. Remove the screw from the battery compartment,
and separate the battery compartment from the case
bottom.
4. Remove the old battery from the battery compartment.
5. Replace the battery with 2pcs of new 1.5V (AAA)
battery
.
6. Rejoin the case bottom and the battery compartment,
and reinstall the screw
.
** END **
This operating manual is subject to change without notice.
F
Opening
Tested
H
Display sinewave RMS( AVG response)
sinewave RMS (AVG response)
RMS value
(See Figure 9)
2.
3.
REV.1
DATE:2015-12-04
P/N:110401105587X
3. For forward voltage drop readings on any semiconductor
component, place the red test lead on the component,s
anode and the black test lead on the component,s cathode.
Note
To avoid damages to the Meter or to the devices under
test, disconnect circuit power and dicharge all the
high-voltage capacitors before measuring continuity.
To test for continuity,connect the Meter as follows:
1. Insert the red lead into the terminal and the
black test lead into the
COM
terminal.
2. Set the rotary switch to and press
SELECT
button to select measurement mode.
3. The buzzer sounds if the resistance of a circuit under
test is less than 50 Ω.
4. The buzzer may or may not sounds if the resistance of
a circuit under test is between 50 Ω to 120 Ω.
5. The buzzer does not sound if the resistance of a circuit
under test is higher than 120Ω.
Note
the connection between the testing leads and the circuit under
test and remove testing leads from the input terminals.
release the Meter slowly until the transformer jaw is completely
closed, Make sure the conductor to be tested is placed at
the center of the transfor- mer jaw, otherwise it will casue
deviation.
4. The measured value shows on the display,it is a effective
value of sine wave (mean value response).
Note
Sleep Mode
To preserve battery life, the Meter automatically turns off
if you do not turn the ratary switch or press any button for
around 15 minutes.
The Meter can be activated by turning the rotary switch
or pressing any button with the following conditions:
1) When the Meter enters Sleep Mode at temperature
functions of Model: UT202, the Meter cannot be activated
by turning the rotary switch to AC current ranges.
2) Pressing any button must be according to
“ The effectiveness
of Functional Buttons” section.
3) The Hold function will be cancelled if the Meter is activated
by pressing the
HOLD
button.
To disable the Sleep Mode function, Press and hold
HOLD
button while turning on the Meter.
