is
discharged. Low battery indication:
Overload indication: "＞5.5GΩ" shows under insulation resistance
between test leads and test ports measurement.
display the unit and function simultaneously
● Automatic voltage release
● Backlight for work in dark sites
● Red light for warning
resistance measurement.
leads
leads Altitude:
low battery indicator shows
under normal condition.)
test leads,
properly. operating manual, carrying case.
● Safety compliances: Overvoltage CATIII 600V, Pollution
Degree 2 as per IEC61010
UT501B Insulation Resistance Tester is designed with brand-new
design and combination of massive integrated and digital circuits; it Compliance Standards:
can measure insulation resistance, low resistance, AC voltage, etc, Electrical Symbols EN61010-1:2010 EN61010-2-030:2010 EN61557-1:2007
and enjoys high degree of accuracy, stable performance, easy Risk of electric shock EN61557-2:2007 EN61557-4:2007 EN61326-1:2013
operation and reliability. It is used for insulation resistance
measurement for insulation materials and various kinds of electric EN61326-2-2:2013
equipments such as transformer, electric machines, cables, 5. Tester's Structure(Front View)
switches, electrical appliances, a ideal tool for electric equipment
Comply with European Union standards measurement
maintenance, testing and inspection.
Safety Information for insulation resistance measurement
Accuracy: ±( a% of reading + b digits ), calibration per year.
The tester 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 Switch button for PI/DAR
carefully before using the instrument. Insulation Resistance Measurement Test button
Rotary knob
Warning
Rated current
Use always as specified in the manual, and keep it for future use.
Shorted Current
Polarization Index/Dielectric Absorption Ratio Measurement
conditions and actions that may cause serious or PI Measurement
fatal damage.
PI Value
Alerts users to avoid electric shock.
conditions and actions that may cause damage to
the instrument or affect accurate measurement.
DAR Measurement
DAR Measurement
voltage over 750VAC.
DAR Value
test leads lead when measuring.
When test leads are shorted and connected to the instrument, do Low Resistance Measurement
not press TEST key. LCD Display
during test. Buttons and Rotary Knob
Do not touch the tested line during insulation measurement.
1. PI/DAR button: measures polarization index/dielectric absorption
ratio.
Voltage Measurement 2. ZERO/LIGHT button: turns on/off the backlight or resets the
Eg: the instrument damaged or had exposed metal. 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.
P/N:110401107221X DATE:2018.06.26 REV.3
5. Rotary knob set to CONTINUITY: to measure low resistance. Dielectric absorption ratio measurement
6. Rotary knob set to 250V/500V/1000V:
to select test voltage for insulation resistance measurement.
(See Figure 3) 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, then
press TEST three times to select another DAR, the screen shows
Time 1(15s)/Time2(1min), press to begin another DAR
If low battery indicator shows on upper left corner of LCD after the
measurement.
meter is turned on, it means battery is almost used up and need to
be replaced.
Low battery indicator
(See Figure 5)
wires
when replacing battery.
(See Figure 1)
Figure 3
B
Figure 5
(See Figure 4)
batteries
Figure 1
installing the
(1) Set the rotary switch to ACV.
(2) Insert the red test lead into "V" jack and the black test lead
into "G" jack.
Figure 4 the knob set to
Please take extreme caution in order to avoid electric shock when figure 4,
measuring high voltage. then switch to any insulation measurement range,
Disconnect test leads and tested circuits and remove test leads
away from input jacks after completing the measurement.
Do not short-circuit the test leads under high-voltage output status Cleaning the housing
or make insulation measurement after high voltage has already
Clean the instrument surface with soft cloth or sponge
R M (See Figure 2) been output.
● Turn the knob to select test voltage 250V/500V/1000V. dampened with clean water.
To avoid damage to the instrument, do not submerge it into
the water.
lead lead
When it is necessary to verify or repair instrument, please
lead lead deliver the instrument to qualified professional serviceman
test probe with the circuit or designated repairing department.
under test.
With the instrument connected to tested circuit as described above, With the knob already set to test voltage 250V/500V/1000V, then *END*
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.
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
Figure 2 (10mins), then press TEST to start PI measurement.
