2. Safety Information 3. Electrical Symbols 5. Tester`s Structure(Front

2. Safety Information 3. Electrical Symbols 5. Tester`s Structure(Front
Voltage Measurement
between test leads
Measurement range
Resolution
Accuracy
AC voltage
30~750V (50/60Hz)
1V
± (2%+3)
Low battery indication:
.
Overload indication: ">*ȍVKRZVXQGHULQVXODWLRQ
resistance measurement.
lead
lead
low battery indicator shows
If
properly.
display the unit and function simultaneously
Ɣ Automatic voltage release
Ɣ Backlight for work on dark sites
Ɣ Red light for warning
(Altitude: <2000m)
UT502A Insulation Resistance Tester is designed with brand-new
design and combination of massive integrated and digital circuits; it
can measure insulation resistance, low resistance, AC voltage, etc,
and enjoys high degree of accuracy, stable performance, easy
operation and reliability. It is used for insulation resistance
measurement for insulation materials and various kinds of electric
equipments such as transformer, electric machines, cables, switches,
electrical appliances, a ideal tool for electric equipment maintenance,
testing and inspection.
2. Safety Information
The instrument is designed and manufactured in compliance with
IEC61010 standard. The manual covers safety information related to
the safe operations and conditions of the instrument. please read
carefully before using the instrument.
under normal condition)
test leads,
operating manual, carrying case.
3. Electrical Symbols
Risk of electric shock
Ɣ Safety compliances:
Overvoltage CATIII 600V, Pollution
Degree 2 as per IEC61010
5. Tester's Structure(Front View)
measurement
Accuracy: ±(a% of reading + b digits), calibration per year.
for
measurement
7 Switch button for PI/DAR
8 TEST button
5RWDU\NQRE
Warning
Insulation Resistance Measurement
Rated voltage
Use always as specified in the manual, and keep it for future use.
Measurement
range
Open circuit
voltage
500V
1000V
2500V
0ȍa*ȍ 0ȍa*ȍ
0ȍa*ȍ
DC 500V+10%
DC 2500V+10%
Under 2.5Mȍ
1.00mA~1.10mA
DC 1000V+10%
Under 1Mȍ
Under 500Kȍ
1.00mA~1.10mA
1.00mA~1.10mA
Short circuit current Approx. Less than 1.8mA
Rated measurement
current
0.00Mȍa0ȍ±(3%+5)
conditions and actions that may cause serious or
fatal damage.
Accuracy range
100Mȍa*ȍ±(5%+5)
10.0Gȍa*ȍ±(10%+5)
Alerts users to avoid electric shock.
conditions and actions that may cause damage to
the instrument or affect accurate measurement.
Polarization Index/Dielectric Absorption Ratio Measurement
PI Measurement
voltage over 750VAC.
leads
When test leads are shorted and connected to the instrument, do
not press TEST key.
during test.
Do not touch the tested line during insulation measurement.
10min insulation resistance/1min insulation resistance
PI Value
Greater than
or equal to 4
Criterion
Best
4---2
Good
Warning
Bad
DAR Measurement 1min insulation resistance/15s insulation resistance
DAR Value
Greater than
or equal to 1.4
Best
1.25--1.0
Good
Eg: the
is
discharged.
Less than or
equal to 1.0
DAR Measurement 1min insulation resistance/30s insulation resistance
Criterion
instrument was damaged or had exposed metal.
2.0---1.0
Low Resistance Measurementc
Open-circuit voltage
Measurement range
Resolution ratio
Accuracy
Approx. 5.0V
0.00~200ȍ
0.01ȍ
± (2%+3)ȍ
Less than or
equal to 1.0
Bad
LCD Display
6. Buttons and Rotary Knob
1. PI/DAR button: measures polarization index/dielectric absorption
ratio.
2. ZERO/LIGHT button: turns on/off the backlight or resets the
display to zero for low resistance measurement.
3. TEST button: turns on/off insulation and low resistance
measurement.
4. Rotary knob set to ACV: to measure AC voltage.
5. Rotary knob set to CONTINUITY: to measure low resistance.
31;
6. Rotary knob set to 500V/1000V/2500V:
to select test voltage for insulation resistance measurement.
(See Figure 3)
replacing
If low battery indicator shows on upper left corner of LCD after the
meter is turned on, it means battery is almost used up and need to
be replaced.
(See Figure 1)
batteries
installing
Figure 3
Figure 1
(1) Set the rotary knob to ACV.
(2) Insert the red test lead into "V" jack and the black test lead into
"G" jack.
Please take extreme caution in order to avoid electric shock when
measuring high voltage.
Disconnect test leads and tested circuits and remove test leads
away from input jacks after completing the measurement.
R
M
set the knob to
Do not short-circuit the test leads under high-voltage output status or
make insulation measurement after high voltage has already been
output.
ƔTurn the knob to select test voltage 500V/1000V/2500V.
lead
the housing
lead
(See Figure 2)
With the knob already set to test voltage 500V/1000V/2500V, then
press TEST button,the instrument will be self-locked to measure
continuously. The test voltage will be output and TEST button will
light up. With the measurement finished, press TEST button to
unlock and stop the measurement.
lead
lead
test probe with the circuit
under test.
With the instrument connected to tested circuit as described above,
When red and black clips are connected to the circuit under test,
high voltage is output from LINE jack and the current from EARTH
jack.
Under insulation measurement mode, press PI/DAR button once
to select PI parameter, the screen displays Time 1(1min)/
Time2(10mins), then press TEST to start PI measurement.
Figure 2
Dielectric absorption ratio measurement
Under insulation measurement mode, press PI/DAR button two
times to select DAR parameter, the screen displays Time 1(30s)/
Time2(1min), then press TEST to start DAR measurement. Press
TEST three times to select another DAR, the screen shows Time
1(15s)/Time2(1min), press to begin another DAR measurement.
Clean the instrument surface with soft cloth or sponge
dampened with clean water.
To avoid damage to the instrument, do not submerge it into
the water.
When it is necessary to verify or repair instrument, please
deliver the instrument to qualified professional serviceman
or designated repairing department.
*END*
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising