PCE Instruments IT55 Manual de usuario

INSTRUCTION MANUAL

PCE-IT

www.pce-industrial-needs.com

Tursdale Technical Services Ltd

Unit N12B

Tursdale Business Park

Co. Durham

DH6 5PG

United Kingdom

Phone: +44 ( 0 ) 191 377 3398

Fax: +44 ( 0 ) 191 377 3357

info@tursdaletechnicalservices.co.uk

http://www.industrial-needs.com/

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INSTRUCTION MANUAL ......................................................................... 1

1.SAFETY INFORMATION....................................................................... 3

2. SPECIFICATIONS................................................................................ 3

OHMS ....................................................................................................................................................4

Continuity Beeper ................................................................................................................................4

Meg OHMS ............................................................................................................................................5

3. PARTS & CONTROLS ......................................................................... 5

4. BATTERY REPLACEMENT................................................................. 6

5. INSULATION RESISTANCE MEASUREMENTS................................. 6

6. LOW RESISTANCE (CONTINUITY) MEASUREMENTS..................... 7

7. AC/DC VOLTAGE MEASUREMENTS................................................. 7

8. POWER TOOLS AND AMALL APPLIANCES..................................... 7

MOTORS ...............................................................................................................................................7

CABLES ................................................................................................................................................8

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1.SAFETY INFORMATION

zRead the following safety information carefully before attempting to operate or

service the meter.

zTo avoid damages to the instrument do not apply the signals which exceed the

maximum limits shown in the technical specifications tables.

zDo not use the meter or test leads if they look damaged. Use extreme caution

when working around bare conductors or bus bars.

zAccidental contact with the conductor could result in electric shock.

zUse the meter only as specified in this manual; otherwise, the protection provided

by the meter may be impaired.

zRead the operating instructions before use and follow all safety Information.

zCaution when working with voltages above 60V DC or 30V AC RMS. Such

voltages pose a shock hazard.

zBefore taking resistance measurements or testing acoustic continuity, disconnect

circuit from main power supply and all loads from the circuit.

1.2 Safety symbols:

Caution refer to this manual before using the meter.

Dangerous voltages.

Meter is protected throughout by double insulation or reinforced insulation.

When servicing, use only specified replacement parts.

CE Comply with EN-61010-1

2. SPECIFICATIONS

2.1 General Information

Environment conditions:

①Installation Categories II

②Pollution Degree 2

③Altitude up to 2000 meters

④Indoor use only

⑤Relatively humidity 80% max.

⑥Operation Ambient 0~40ºC

Maintenance & Clearing:

①Repairs or servicing not covered in this manual should only be performed by

qualified personnel.

②Periodically wipe the case with a dry cloth. Do not use abrasives or solvents on

this instruments.

Display: Large LCD with dual display

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Measurement Range: 200Ω, 200kΩ, 200MΩ/250V, 200MΩ/500V, 2000MΩ/1000V,

750V/ACV, 1000V/DCV.

Sampling Rate: 2.5 times per second.

Zero Adjustment: Automatic adjustment.

Over Range Indicator: Number 1 of highest digit is displayed.

Low Battery Indication: The is displayed when the battery Voltage drop below

the operating voltage.

Operating Temperature: 0ºC to 40ºC (32ºF to 104ºF) and Humidity below 80% RH

Storage Temperature: -10ºC to 60ºC (14ºF to 140ºF) and Humidity below 70% RH

Power source: DC9V (6x1.5V Size “AA” battery or Equivalent)

Dimensions: 200(L) x 92(W) x 50(H) mm

Weight: Approx 700g include battery

Accessories: Test leads, 6pcs battery, Carrying case, manual.

2.2 Electrical Specifications

Accuracies are specified in the way:

±(…% of reading +…digits) at 23ºC±5ºC,below 80% RH.

OHMS

Range Resolution Accuracy Max. open

Circuit

Voltage

Overload

Protection

200Ω0.1Ω+(1%+2) 4.5V 250Vrms

200kΩ0.1kΩ3.0V

Continuity Beeper

Range Resolution Operation

Resistance

Max.open

Circuit

Voltage

Overload

Protection

•))) 0.1ΩResistance≤40Ω4.5V 250Vrms

Short circuit current ≤200mA

DC Voltage

Range Resolution Accuracy Input

Impedance

Overload

Protection

1000V 1V +(0.8%+3) 10MΩ1000Vrms

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AC Voltage (40Hz~400Hz)

Range Resolution Accuracy Input

Impedance

Overload

Protection

750V 1V +(1.2%+10) 10MΩ750Vrms

Meg OHMS

Range Resolution Accuracy Terminal Voltage

200MΩ/250V 0.1MΩ

+(3%+5)

250V+10%~-0%

200MΩ/500V 0.1MΩ500V+10%~-0%

0~1000MΩ/1000V

1MΩ

1000V+10%~-0%

1000~2000MΩ

/1000V

+(5%+5)

Range Test Current Short circuit current

200MΩ/250V

1mA

250KΩ(load)

≤1mA

200MΩ/500V 500KΩ(load)

0~1000MΩ/1000V

1MΩ

1000~2000MΩ

/1000V

3. PARTS & CONTROLS

① Digital Display

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② Data Hold Button

③ Lock Button

④ Backlight Button

⑤ Test Button

⑥ Rotary Function switch

⑦ VΩJack

⑧ COM input jack

⑨ Pothook

⑩ Battery Cover

4. BATTERY REPLACEMENT

4.1 How to connect test leads.

a). On MΩRange: Connect the red test lead into the “VΩ” terminal and the black lead

into the “COM” terminal.

b) On 200Ωand ACV Range: Connect the red test lead into the “VΩ” terminal and the

black lead into terminal “COM”

4.2 Battery Check-UP & Replacement

a)As battery power is not sufficient. LCD will display . Replacement of 6 pcs new

batteries, type 1.5V size “AA” is Required.

b). Place back the battery cover and four the screws.

4.3 Test leads check

Set the range select switch to the 200Ωrange. With the tip and alligator clip of the test

leads connected. The indicator should read 00.0Ω. When the leads are not connected

the display will read infinity indicated by “1”. This will ensure that test lead are under

working condition.

5. INSULATION RESISTANCE MEASUREMENTS

a). Measurements at 200MΩ/250V This is the voltage used for the majority of

insulation resistance tests on normal installation requirement. To measure

insulation resistance, press the test button to power on the tester. The LCD will

displayed the insulation resistance. Section VII indicated that subdivision of large

installations might be necessary because of the large number of parallel insulation

resistance. In such a case, an installation may be divided into sections, each

being separately tested. Each section must have not less than fifty outlets, an

outlet being a switch, socket, lighting point etc. A switched socket counts as one

outlet. The minimum acceptable insulation resistance is 1MΩ. For a large

installation, the capacitance of the insulation will be high, and it will take longer for

it to become charged by the direct testing voltage. Care must be taken not to take

a reading until there is a steady reading, indicating that the charging process is

complete

Note:

The charge stored in the insulation will be discharged automatically when the test

button is released. Be careful not to turn the range switch knob whilst the test button

is pressed, or the instrument will be damaged.

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b). Measurements at 2000MΩ/1000V

Some specifications require testing at 1000V. This voltage must also be selected

where the supply voltage of the installation is between 500V and 1000V. First, set

the range switch to 1000V and then proceed as indicated in a above for 500V

testing. The above note also applies to testing at 1000V. In addition the following

applies.

Note: Make sure that the circuit under does not include components Which will be

damaged by the 1000V applied. Many normal components of an installation are

likely to be damaged if tested at 1000V. Examples are power factor correction

capacitors, low voltage mineral insulated cables, electronic light dimmers,

electronic ballasts and starters for fluorescent lamps etc…

c). Lock power on Feature

For hands free operation a lock power on feature is incorporated on the press to

test button. Set LOCK button to lock test voltage, Pressing it again will tester off.

6. LOW RESISTANCE (CONTINUITY) MEASUREMENTS

a). Set the range switch to 200Ω·))) Position

b). Connect the red test lead to the V Ωterminal and black to the COM terminal.

c). Connect the tips of the test leads to both ends of the circuit under test. read

resistance in Ωon the LCD.

d). When the impedance on circuit is below approximately 40Ω. It will indicate by a

continuous beeper.

7. AC/DC VOLTAGE MEASUREMENTS

a). Set the range switch to ACV or DCV position

b). Connect red test lead to “V Ω” terminal and black test lead to terminal “COM”.

c). Connect test prods of test leads IN PARALLEL to the circuit being measured.

d). Read the voltage value on LCD.

8. POWER TOOLS AND AMALL APPLIANCES

This test would also apply to other similar equipment that has a line cord. For double

insulated power tools, the megohmmeter lead shown connected to the housing would

be connected to some metal part lf the tool(e..g chuck,blade).

Note:The switch of the device must be in the “ON”position and the main power should

be disconnected.

MOTORS

AC-Disconnect the motor from the line by disconnecting the wires at the motor

terminals or by opening the main switch. If the main switch is used and the motor

also has a starter then the starter must be held, by some means, in the “ON” position.

In the latter case, the measured resistance will include the resistance of the motor,

wire and all other components between the motor and the main switch. If a weakness

is in dicated, the motor and other components should be checked individually. If the

motor is disconnected at the motor terminals, connect one megohmmeter lead to the

grounded motor housing and the other lead to One of the motor leads. DC-Disconnect

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the motor from the line. To test the brush rigging,field coils and armature connect one

megohmmeter lead to the grounded motor housing and the other lead to the brush on

the commutator. If the resistance measurement indicates a weakness,raise the

brushes off the commutator and separately test the armature, field coils and brush

rigging by connecting one megohmmeter lead to each of them individually, leaving the

other connected to the grounded motor housing. The above also applies to DC

Gemerators.

CABLES

Disconnect the cable from the line. Also disconnect opposite end to avoid errors due

to leakage from other equipment. Check each conductor to ground and /or lead

sheath by connecting one megohmmeter lead to a ground and /or lead sheather and

the other megohmmeter lead to each of the conductors in turn. Check insulation

resistance between conductors by connecting megohmmeter leads to conductors in

pairs.

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In this direction will find a vision of the measurement technique:

http://www.industrial-needs.com/measuring-instruments.htm

NOTE: "This instrument doesn’t have ATEX protection, so it should not be used in potentially explosive

atmospheres (powder, flammable gases)."

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