TENMARS YF-509 User guide

DIGITAL INSULATION TESTER

YF

-

509

OPERATING

TENMARS ELECTRONICS CO., LTD

MANUAL

HB2YF5090000

CONTENTS

1. FEATURES..................................................... 3

2. SPECIFICATIONS......................................... 4

2-1General Specifications .................................. 4

2.2Electrical Specifications:................................ 6

3. EXTERIOR FEATURES ................................ 8

4. MEASUREMENT........................................... 9

5. BATTERY REPLACEMENT......................... 12

6. SYMBOL/ABBREVIATION

EXPLANATION............................................ 13

7. PRECAUTIONS........................................... 13

8. IMPORTANT RECOMMENDATIONS.......... 15

YF-509

Thank you for your patronage. Before using
this insulation meter, please carefully read
the instructions below to allow proper
operation, minimize damage and getting
the best performance from this instrument.

1. FEATURES

 Measures high insulation resistance

(0.1MΩ～2000MΩ), manual range , of
200MΩ / 250V,200MΩ / 500V and
2000MΩ / 1000V.

 Measures DC voltage (0 V~1000V), AC

Voltage
( 0V ~ 750V).

 The unit has select able long duration

and momentary operation switches for
high resistance measurements.

 Has a DATA HOLD switch to hold LCD

readings.

 Has a Maximum Reading Hold function.

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YF-509

2. SPECIFICATIONS

2-1 General Specifications

 Display :

3 1/2 digit LCD that indicates values up
to 1999, units, decimal point and
symbols.

 Polarity indication : Automatically

displays “ - “ symbol during negative
input.

 Zero adjustment : Automatic zeroing.
 Overload indication :

Display the highest “OL” at left side.

 Low battery indication :

Replace battery as LCD displays “ “.

 Sampling rate : 2.5 times/second.
 Power supply : 1.5V x 8 NEDA 15F IEC

R6 JIS UM-3

 Battery life : 100 hours

4

YF-509

Note:

Power consumption is greatest when
operating in the 250V, 500V and 1,000V
ranges or when measuring high insulation
resistance. Battery life will be reduced if
operation is frequently in these ranges.

 Operation height : 2000M under the

elevation above sea level.

 Installation categoriesⅢ. Double and

Reinforce Insulation .

 Operation environment : for indoor use ,

pollution degree 2.

 Operating temperature and humidity :

0℃～40℃at less than 80% RHD.

 Storage temperature and humidity :

-10℃～60℃below 70% RH.

 Dimensions and weight :

160 x 100 x 52mm, about 480g (incl.
Battery).

 Accessories : Ohm probe -1 set, case -1

pcs), batteries- 8 PCs and operation
manual.

5

2.2 Electrical Specifications:

(23℃±5℃, below 80％RH ).

Accuracy : ±(. . . % reading +. . . digits)

DC Voltage

Range Resolution Accuracy

DCV 1V

±(0.5%

+1)

AC Voltage

Range Resolution Accuracy

DCV 1V

±(0.8%

+4)

Insulation High-resistance

Range Resolution Accuracy Tolerance

Input
Impedance

10MΩ

Input

Impedance

10MΩ

YF-509

Overload

Protection

DC 1000V

AC 750V

rms

Overload

Protection

DC 1000V

AC 750V

rms

200M/250V
200M/500V
2000M/1000

0.1MΩ
±(3%+3)

0.1MΩ

1 MΩ ±(3%+5)

6

0.4mA max

0.9mA max

1.7mA max

Measurement Voltage

range,

Range

250V/

50MΩ

500V/

1000MΩRated voltage ±10%

1000V/

2000MΩRated voltage ±10%

Terminal Measurement
open Voltage

Rated voltage ±10%

YF-509

Supported Range
Terminal Voltages

When the resistance
is in the 1MΩrange,
the rated voltage

should reach up to
90%.

When the resistance

is in the 20MΩ
range,the rated

voltage
When the resistance
is in the 50MΩ
the rated voltage
should reach up to

90%.

7

YF-509

3. EXTERIOR FEATURES

(1). Liquid crystal display (LCD) : Displays

measurement readings, all numerical

units, symbols and range indications.
(2). H.V : High voltage output indication.
(3). LOCK switch : Used for extended

duration MΩ measurements.

(4). PUSH switch : Used for momentary

duration MΩ measurements.

(5). D-HOLD : Holds displayed readings.
(6). Function range selector switch :

Meter function range selection

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YF-509

indication.
(7). V / test socket : Positive input

terminal for AC/DC voltages and

continuity testing.
(8). EARTH test socket: Positive input

terminal for high voltage output MΩ

resistance measurements.
(9). Test wiring assembly.
(10). MAX : Lock up max. Value of LCD.
(11). LINE test socket : Negative input

terminal for m resistance

measurements.
(12). COM test socket : For connection of

negative input terminal. AC/DC

Voltages and continuity tests.

4. MEASUREMENT

Direct Current Voltage (DCV) and Alternating
Current Voltage (ACV) measurement.
(1). Select the V or V~
(2). Insert the red test probe into the " V/

" socket and the black test probe

into the "COM" socket.

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YF-509

(3). Measure voltage with the two tips of the

test probes (by contacting a test

circuit).
(4). The value of the voltage\read will be

displayed on the LCD screen.

Continuity Test

(1). Insert the red test probe into the " V/

" socket and the black test probe into

the "COM" socket.
(2). Move the function switch to the " "

range.
(3). Place the probes in series with the

circuit (a pure resistance circuit) to be

tested.
(4). A continuous beeps will sound when

the resistance is less than 80Ω and the

resistance value displayed on the LCD

screen.

Note :

Continuity tests should only be conducted on
a purely resistive circuit having no voltage or
current present.

10

YF-509

High Resistance Insulation Test

(1). Insert the red test probe into the "LINE"

socket and the black test probe into the

"EARTH" socket.
(2). Turn the function switch to the

200MΩ/250V,200MΩ/500V or

2000MΩ/1000V position (according to

the voltage level).
(3). Connect the red test probe (LINE) to

center conductor of the line to be tested

and connect the black test probe

(EARTH) to the insulator surface.
(4). Press the "PUSH" switch to allow

measurement of the high voltage

output. If measurement is to be

conducted for an extended duration,

move the "LOCK" switch from left to

right to enter this testing mode.
(5). The resistance reading will be

displayed on the LCD screen.

11

YF-509

5. BATTERY REPLACEMENT

The meter is powered by 1.5V battery
x8pcs (NEDA 15F IEC R6 JIS UM-3). use the
fowling procedure to replace the battery:
(1). Move the function switch to the "OFF"

position.

(2). Use a screw driver to unfasten the

screws on the battery cover and
remove the cover.

(3). Take out the old batteries and replace

with new batteries, taking care to note
the correct polarity.

(4). Re-install the battery cover and tighten

the holding screws.

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YF-509

6. SYMBOL/ABBREVIATION

EXPLANATION

1) : indicates direct current.

2) : indicates alternating current.

3) : indicates ground.

4) : indicates double insulation.

5) : indicates high voltage hazard.

7. PRECAUTIONS

Extreme caution should be exercised
when taking measurements under the
following situations:
(1). When measuring high voltages in

excess of 20 volts.

(2). Avoid physical contact when measuring

AC power.

(3). Avoid measuring voltage and current in

humid or wet environments.

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YF-509

(4). Never use meter test probes (the metal

section) and other accessories that are
in abnormal condition. This includes
damage, bending, breakage,
attachment of foreign objects and
unobservable internal damage.

(5). Avoid contacting exposed metal

(conductive) parts, including the tested
points, sockets, fasteners and wiring.

(6). Always insulate yourself from circuits

being measured.

(7). Never install a fuse that is of larger

capacity than the unit originally used in
the meter or use a replacement fuse
that does not meet the recommended
specifications.

(8). Never operate the meter where

explosive or flammable gas (or material)
are present or in environments having
a high dust content.

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YF-509

8. IMPORTANT

RECOMMENDATIONS

This electrical meter is a high precision
instrument.
To maintain full accuracy, users must not
exceed the previously described
specifications regarding operation and
storage. Other recommendations include:
(1). Do not measure voltages that exceed

DC 1000V and AC 750V rms.

(2). For maintenance, use a soft dry cloth

for cleaning the unit. Never use a wet
cloth, solvents or water, etc.

(3). Remove the batteries if the unit will not

be operated for an extended length of
time. Also, do not store the unit in areas
of high temperature and humidity.

15

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Our products of high quality are selling

well all over the world

TENMARS ELECTRONICS CO., LTD

6F, 586, RUI GUANG ROAD, NEIHU,

TAIPEI 114, TAIWAN.

E-mail: [email protected]

http://www.tenmars.com