Unit UT501B Bedienungsanleitung

UT501B 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.

Safety Information

Warning

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

carefully before using the instrument.

Use always as specified in the manual, and keep it for future use.

conditions and actions that may cause serious or

fatal damage.

Alerts users to avoid electric shock.

conditions and actions that may cause damage to

the instrument or affect accurate measurement.

voltage over 750VAC.

Eg: the instrument damaged or had exposed metal.

Do not touch the tested line during insulation measurement.

during test.

test leads lead when measuring.

When test leads are shorted and connected to the instrument, do

not press TEST key.

Low Resistance Measurement

Polarization Index/Dielectric Absorption Ratio Measurement

PI Measurement

PI Value

DAR Measurement

DAR Value

Shorted Current

Rated current

Insulation Resistance Measurement

Accuracy: ±( a% of reading + b digits ), calibration per year.

Electrical Symbols

Risk of electric shock

discharged.

between test leads and test ports

resistance measurement.

leads

low battery indicator shows

properly.

Low battery indication:

Overload indication: "＞5.5GΩ" shows under insulation resistance

measurement.

display the unit and function simultaneously

Altitude:

under normal condition.)

operating manual, carrying case.

test leads,

Voltage Measurement

●Automatic voltage release

● Backlight for work in dark sites

● Red light for warning

● Safety compliances: Overvoltage CATIII 600V, Pollution

Degree 2 as per IEC61010

5. Tester's Structure(Front View)

measurement

for insulation resistance measurement

Switch button for PI/DAR

Test button

Rotary knob

LCD Display

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.

Buttons and Rotary Knob

P/N:110401104397X

5. Rotary knob set to CONTINUITY: to measure low resistance.

6. Rotary knob set to 250V/500V/1000V:

to select test voltage for insulation resistance measurement.

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.

Low battery indicator

(See Figure 1)

Figure 1

(1) Set the rotary switch 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.

(See Figure 2)

lead lead

test probe with the circuit

under test.

With the instrument connected to tested circuit as described above,

Figure 2

(See Figure 3)

Figure 3

(See Figure 4)

Figure 4

figure 4,

then switch to any insulation measurement range,

Do not short-circuit the test leads under high-voltage output status

or make insulation measurement after high voltage has already

been output.

●Turn the knob to select test voltage 250V/500V/1000V.

lead lead

With the knob already set to test voltage 250V/500V/1000V, 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.

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.

Cleaning the housing

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.

the knob set to

batteries

installing the

Figure 5

wires

when replacing battery.

(See Figure 5)

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, then

press TEST three times to select another DAR, the screen shows

Time 1(15s)/Time2(1min), press to begin another DAR

measurement.

*END*

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