digital insulation tester operator'

DIGITAL INSULATION TESTER
OPERATOR’S MANUAL
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CONTENTS
1.
SAFETY INFORMATION
……………1
1.1
PRELIMINARY
……………2
1.2
DURING USE
……………3
1.3
SYMBOLS
……………4
1.4
MAINTENANCE
……………5
2.
DESCRIPTION
……………6
2.1
NAMES OF COMPONENTS
……………9
2.2
SWITCH AND BUTTONS ELUCIDATE
……………10
3.
SPECIFICATIONS
……………11
3.1
GENERAL SPECIFICATIONS
……………11
3.2
ELECTRICAL SPECIFICATIONS
……………12
4.
OPERATING INSTRUCTION
……………16
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4.1
SWITCH DISLOCATION ALARM
……………16
4.2
SOUND AND FLASH ALARM
……………16
4.3
READ HOLD
……………17
4.4
HAND OPERATING AND TIME MEASURING
……………17
4.5
PREPARATION FOR MEASUREMENT
……………18
4.6
MEASURING INSULATION RESISTANCE
……………19
4.7
MEASURING AC VOLTAGE
……………22
4.8
MEASURING DC VOLTAGE
……………24
4.9
MEASURING RESISTANCE
……………26
4.10 CONTINUITY TEST
……………27
5.
MAINTENANCE
……………29
5.1
BATTERY REPLACEMENT
……………29
5.2
TEST LEADS AND TEST CLIPS REPLACEMENT
……………30
6.
ACCESSORIES
……………31
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1. SAFETY INFORMATION
This meter has been designed in general to comply with IEC 348 and
according to IEC-1010 concerning about electronic measuring instruments
with an overvoltage category 1000V CAT ΙΙ, 600V CAT Ш and pollution 2.
Follow all safety and operating instructions to ensure that the meter is used
safely and is kept in good operating condition.
Pay attention to cautions and warnings, which will inform you of potentially
dangerous procedures.
WARNING
To ensure safe operation, please follow the directions in this section
carefully.
Electricity can cause severe injuries even with low voltages or currents.
Therefore it is extremely important that you read the following information
before using this Insulation Tester.
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1.1 PRELIMINARY
1.1.1 When using the meter, the user must observe all normal safety rules
concerning:
• Protection against the dangers of electrical current
• Protection of the meter against misuse
1.1.2 When the meter is delivered, check that it has not been damaged in
transit.
1.1.3 When poor condition under harsh preservation or shipping conditions
caused, inspect and confirm this meter without delay.
1.1.4 test leads or test clips must be in good condition. Before using verify
that the insulation on test leads or test clips is not damaged and/or the
leads wire is not exposed.
1.1.5 Full compliance with safety standards can be guaranteed only if used
with test leads or test clips supplied. If necessary, they must be
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replaced with the same model or same electric ratings.
1.1.6 This meter must only be used by a competent trained person and in
strict accordance with the operator’s manual.
1.2 DURING USE
1.2.1 Never exceed the protection limit values indicated in specifications for
each range of measurement.
1.2.2 When the meter is linked to a measurement circuit, do not touch
unused terminals.
1.2.3 Do not measure voltage if the voltage on the terminals exceeds 1000V
above earth ground.
1.2.4 Always be careful when working with voltages above 60V DC or 30V
AC rms, keep fingers behind the probe barriers while measuring.
1.2.5 Never connect the meter leads across on live circuits while the function
switch is in the insulation resistance, resistance or continuity mode.
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1.2.6 Ensure all circuits are de-energized before measuring.
1.2.7 Before rotating the range switch to change ranges, disconnect test
leads from the circuit under test.
1.2.8 If any faults or abnormalities are observed, the meter can not be used
any more and it has to be checked out.
1.2.9 Never use the meter unless the rear case is in place and fastened fully.
1.2.10 Please do not store or use meter in areas exposed to direct sunlight,
high temperature, humidity or condensation.
1.3 SYMBOLS
Important safety information, refer to the operating manual.
Double insulation Protection classΙΙ .
Earth ground
Low Battery
~ AC (alternating current)
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DC (direct current)
Continuity Buzzer
1.4 MAINTENANCE
1.4.1 Please do not attempt to adjust or repair the meter by removing the rear
case while voltage is being applied. A technician who fully understands
danger involved should only carry out such actions.
1.4.2 Before opening the battery cover of the meter, always disconnect test
leads or test clips from all sources of electric current.
1.4.3 Always set the function switch to the OFF position when the meter is
not in use.
1.4.4 If the meter is to be stored for a long period of time, the batteries should
be removed to prevent damage to the unit.
1.4.5 Do not use abrasives or solvents on the meter, use a damp cloth and
mild detergent only.
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2. DESCRIPTION
- This meter has the function of
sound and flash alarm. If the
function
switch
and
range
switch is out of place, you will
hear a humming sound per
two seconds from the inside
alarming
system.
This
protection provides for meter
to avoid damage by operation
improperly.
- In
measurement,
the
test
button is pressed, the meter’s
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alarming system will give out a humming sound (per two seconds), and the
red high voltage output indicator is flashing, which warns the operator to
pay attention to the high output voltage, and avoid getting electric shock.
- Overload protection and low battery indication is provided.
- This meter is a portable professional measuring instrument with large LCD.
- This meter has function of data hold.
- When using, it can show ranges engineering unit enunciators measuring
results.
- A double rotary switch is used to select functions and ranges.
- Test button with lock function.
- Releasing the test button automatically will discharge the capacitance of a
circuit under test.
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2
3
4
5
6
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2.1 NAMES OF COMPONENTS (See Fig 3)
1
High Voltage Output Indicator
2
LCD Display
3
Panel
4
Test Button
5
Data Hold Switch (D-H)
6
Function Switch
7
Range Switch
8
HIGH Jack
9
LOW Jack
10
Battery Cover
11
Case
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2.2 SWITCH AND BUTTONS ELUCIDATE
• Function Switch
This switch is used to select measure mode and the switch of power.
• Range Switch
This switch is used to select desired ranges.
• Test Button
This Button is used to the insulation resistance measurements.
• Data Hold Switch
This switch is used to the switch of data hold
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3 SPECIFICATIONS
Accuracy is specified for a period of year after calibration and at 18
64°F to 82°F with relative humidity to 75%.
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3.1 GENERAL SPECIFICATIONS
3.1.1 Max. Voltage Between Terminals And Earth Ground: 1000V DC or AC
3.1.2 Measuring method: Dual-slope integration A/D converter
3.1.3 Sampling Time: approx. 0.4 second
3.1.4 Display: 22mm LCD
3.1.5 Max. Show Value: 1999 (3 1/2)
3.1.6 Polarity Indication: ‘-’indicates negative polarity.
3.1.7 Overrange Indication: Display ‘1’ or ‘-1’
3.1.8 Unit showing: showing of function and electrical capacity.
3.1.9 Power Supply: 1.5V × 6 (size AA) batter (recommended to use the
alkaline or heavy duty battery.)
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3.1.10 Power Consumption:
Approx. 5mA DC1000V AC750V 200Ω
Approx. 30mA 200MΩ/250V
Approx. 50mA 200MΩ/500V
Approx. 100mA 2000MΩ/1000V
3.1.11 Low Battery Indication: ‘
3.1.12 Operating Temperature: 0
’ displayed
to 40
32°F to 104°F
3.1.13 Operating Humidity: ≤85%RH
3.1.14 Storage Temperature: -10
to 50
10°F to 122°F
3.1.15 Dimension: 192×122×55 mm
3.1.16 Weight: Approx. 545g including battery
3.2 ELECTRICAL SPECIFICATIONS
Circumstance Temperature: 23±5
Relative Humidity: < 75%
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3.2.1 Insulation Resistance
Range
200MΩ/250V
200MΩ/500V
2000MΩ/1000V
Test Voltage
DC 250V±10%
DC 500V±10%
DC 1000V±10%
Measuring Ranges
0 ~ 200MΩ
0 ~ 200MΩ
0 ~ 2000MΩ
0 ~ 1000MΩ
Accuracy
±3.0% rdg ±5 digits
1000 MΩ~ 2000MΩ
±5.0% rdg ±5 digits
Range
200MΩ/250V
200MΩ/500V
2000MΩ/1000V
Output Voltage on Open Circuit
250V ±10%
500V ±10%
1000V ±10%
Minimum Output Voltage
225V at 0.25MΩ
450V at 0.5MΩ
900V at 1MΩ
Test Current (approx.)
1mA at 0.25MΩ
1mA at 0.5MΩ
1mA at 1MΩ
Output Short Circuit Current
≤2.5mA
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3.2.2 AC Voltage
Range
Resolution
700V
1V
Accuracy
± 1.2% of rdg + 5 digits
- Input Impedance: 10MΩ
- Maximum Input Voltage: 700V rms AC or 1000V DC
- Frequency Range: 40 to 400Hz
- Response: Average, calibrated in rms of sine wave
3.2.3 DC Voltage
Range
Resolution
1000V
1V
Accuracy
± 0.8% of rdg + 3 digits
- Input Impedance: 10MΩ
- Max. Input Voltage: 1000V DC or 700V rms AC
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3.2.4 Resistance
Range
Resolution
200Ω
0.1Ω
Accuracy
± 1.0% of rdg + 3 digits
- Open circuit voltage approximate 2.5V
- Overload Protection: 250V DC or rms AC
3.2.5 Continuity
Range
Function
Built-in buzzer will sound, if resistance is lower than 50Ω.
- Open circuit voltage approximate 2.5V
- Overload Protection: 250V DC or rms AC
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4. OPERATING INSTRUCTION
4.1 SWITCH DISLOCATION ALARM
When using for measuring AC voltage, DC voltage, resistance and continuity
test, you must rotate the function switch to “200Ω
rotate the range switch to “ 200Ω
,1000V
700V~ 1000V
, 700V~” ,
” ; measuring
insulation resistance, you must rotate the function switch to “MAUN. LOCK
1min. LOCK 2min.
LOCK 4min” . Otherwise, the inside alarm system will
give out a humming sound per two seconds. The indicator shows random
reading.
4.2 SOUND AND FLASH ALARM
In insulation range, the test button is pressed, the inside alarming system will
send out a humming sound per two seconds, also the right red high voltage
output indicator of the LCD flashes.
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4.3 READ HOLD
If you need data hold when measuring, you can put on “HOLD”, it will hold
the reading and the showing of the LCD will be locked. If you put the switch
again, data hold is not continuing.
4.4 HAND OPERATING AND TIME MEASURING
In insulation range, the function switch is rotated to “MAUN.”, the meter will
be operated by hand. Once press the test button, the measurement begins; If
there is a long-time measurement, you can press the test button and rotate it
counter clockwise to lock position. The function switch is rotated to “LOCK
1min., LOCK 2min., LOCK 4min.”, then press the green test button, which will
measure timely for one minute, two minutes and four minutes. In this course,
if you want to stop measurement, you can rotate the function switch to
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“MAUN.” again.
4.5 PREPARATION FOR MEASUREMENT
4.5.1 The “
” besides the input jack shows that the input voltage should be
less than specification on the sticker of the meter to protect the inner
circuit from damaging.
4.5.2 If the battery voltage is less than 7V, display will show “
”, the battery
should be changed at this time.
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4.6 MEASURING
INSULATION
RESISTANCE
(See Fig 4, Fig 5, Fig 6)
Warning
Insulation tests should be
conducted on circuits that
are
de-energized.
Ensure
circuits are not live before
commencing testing.
Using test clips connect the
meter and the tested circuit,
then press test button for
testing.
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4.6.1 Select the required test mode
MANU., LOCK 1min., LOCK
2min.,
LOCK 4min.
by
rotating the function switch.
4.6.2 Select the required range
(200MΩ/250V, 200MΩ/500V,
2000MΩ/1000V ) by rotating
the range selector.
4.6.3 Connect the black test clip to
the LOW jack and the red test
clip to the HIGHjack.
4.6.4 Attach the test clips to the
circuit to be tested.
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4.6.5 Press the test button. In
hand mode, you can
repress the test button
and
then
counter
clockwise rotate it to
the lock position.
4.6.6 You can get reading
from LCD.
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Warning
Never touch the circuit under test during insulation measuring.
Never rotate the range switch while the test button is pressed. This
may damage the meter.
When measuring is complete ensure that the test button is released
before the test clips are disconnected. This is because the system
may be charged up and it must be allowed to discharge through the
tester's internal discharge resistor.
4.7 MEASURING AC VOLTAGE (See Fig 7)
4.7.1 Connect the black test lead to the LOW jack and the red test lead to the
HIGH jack.
4.7.2 Put the function switch on the “200Ω
, 1000V
, 700V~” position.
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4.7.3 Put the range switch on the
700V~ range position.
4.7.4 Connect test leads across
AC
the source or load under
measurement.
4.7.5 You can get reading from
LCD.
NOTE:
•“
” means you can’t input the
voltage which more than 700V
rms AC or 1000V DC, it’s
possible
to
show
higher
voltage, but it’s may destroy
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the inner circuit.
• Pay attention not to get an
electric shock when measuring.
DC
4.8 MEASURING DC VOLTAGE
(See Fig 8)
4.8.1 Connect the black test lead
to the LOW jack and the red
test lead to the HIGH jack.
4.8.2 Put the function switch on
the “200Ω
, 1000V
,
700V~” position.
4.8.3 Put the range switch on the
1000V
range position.
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4.8.4 Connect test leads across the source or load under measurement.
4.8.5 You can get reading from LCD. The polarity of the red lead connection
will be indicated along with the voltage value.
NOTE:
• “
” means you can’t input the voltage which more than 1000V DC or
700V rms AC, it’s possible to show higher voltage, but it’s may destroy
the inner circuit.
• Pay attention not to get an electric shock when measuring.
4.9 MEASURING RESISTANCE (See Fig 9)
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Warning
When checking in-circuit resistance, be sure the circuit under test
has all power removed and that all capacitors have been
discharged fully.
4.9.1 Connect the black test lead to the LOW jack and the red test lead to the
HIGH jack.
4.9.2 Set the function switch on the “200Ω
,1000V
, 700V~ “ position.
4.9.3 Set the range switch on the 200Ω range position.
4.9.4 Connect test leads across the resistance under measurement.
4.9.5 You can get reading from LCD.
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NOTE:
• When only the figure ‘ 1 ’ is
displayed, it indicates overrange
situation.
• When the input is not connected,
i.e. at open circuit, the figure
‘1’ will be displayed for the
overrange condition.
4.10 CONTINUITY TEST (see Fig
9)
4.10.1 Connect the black test lead
to the LOW jack and the red
test lead to the HIGH jack.
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4.10.2 Set the function switch on
the “200Ω
,1000V
, 700V~ “ position.
4.10.3 Set the range switch on the
range position.
4.10.4 Connect test leads across two points of the circuit under testing.
4.10.5 If continuity exists i.e., resistance less than 50Ω , built-in buzzer will
sound continuously.
NOTE:
• If the input open circuit, the figure‘1’ will be displayed.
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5. MAINTENANCE
5.1 BATTERY REPLACEMENT
(See Fig 10)
WARNING
Before attempting to remove the
battery cover, be sure that test
leads or test clips have been
disconnected from measurement
circuit to avoid electric shock
hazard.
5.1.1 If the sign‘
’appears on the
LCD display, it indicates that the
battery should be replaced.
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5.1.2 Loosen the screw fixing the battery cover and remove it.
5.1.3 Replace the exhausted battery with a new one.
5.1.4 Put the battery cover as its origin.
5.2 TEST LEADS AND TEST CLIPS REPLACEMENT
WARNING
Full in compliance with safety standards can be guaranteed only if
used with test leads or test clips supplied. If necessary, they must
be replaced with the same model or same electric ratings. Electric
ratings of the test leads or test clips: 1000V 5A
You must replace the test leads or test clips if the lead is exposed.
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6. ACCESSORIES
1
Test Leads
Electric Ratings 1000V 5A
one piece
2
Test Clips
Electric Ratings 1000V 5A
one piece
3
Battery
1.5V SIZE “AA”
six pieces
4
Operator’s Manual
one piece
5
Screwdriver
one piece
6
Soft Case
one piece
7
Carrying Case
one piece
8
Packing Box
one piece
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