KONEL BM500A User manual

1
BM500A OPERATOR’S MANUAL
I. Overview
Welcome to use the product!
500A is a digital insulating resistance tester. Output test
voltage can be switched among 250V/500V/1000V, The
measurement range of the meter can reach up to1999MΩ. The
product is applicable to measurement of the insulating
resistance of various insulating materials and electric
equipments such as transformers, motors, cables, switches,
and electric apparatuses. It is also applicable to maintenance,
test, and inspection of various electric equipments. It is
compact in structure, convenient to carry, and an ideal
electrical and electronic testing meter of yours.
II. Safety information
(1) Description of safety marks:
Warning: important safety information the user must
read！
Danger: high-voltage electric shock is present！
Double-insulated protection
(2) Read the operating instructions carefully before use the
meter.
(3) It is strictly prohibited to use the meter before its rear
cover is put in place. Otherwise, it might cause an electric
shock.
(4) Check and make sure the insulating layer of the test cable
is in good condition without any breakage.
(5) To avoid electric shock, do not touch the test cable and the
circuit under test when performing a test.
(6) Make sure one end of the test cable is securely inserted
into the terminal.
(7) During test, any range must not exceed its specified
maximum input value.
(8) During test, do not operate the switch knob for changing a
range to avoid damaging the meter.
(9) Before performing insulation test, make sure the range
selection switch has been set within an appropriate
voltage range.
(10) Do not perform insulating resistance test in a combustible
environment. Spark may cause explosion.
(11) Stop using the meter, if its case or test cable is broken
during use and the metal is exposed
(12) When open the rear cover for changing battery, make sure
the test cable has been removed out of the test terminal
and the range switch switched to OFF position.
(13) Take the battery out when the meter will not be used for a
long time.
(14) When “
-
+
” is displayed in the meter, it is necessary to
change the battery in time to ensure measurement
accuracy.
III. Name and function of parts (see the figure)
1. LCD
2. Data-hold Switch (HOLD)
3. Rotary Switch: use this switch to select functions and
ranges
4．L (LINE) input terminal (connected to line terminal of the
to-be-tested object).
5．G input terminal: shielded terminal of the insulating
resistance.
6．E (EARTH) input terminal (connected to EARTH
terminal of the o-be-tested object)
7．TEST/STOP key: it is used to measure the insulating
esistance
to-be-tested object)
8. Indicator light of high voltage
IV. General characteristics
(1) Auto range: “1” will be displayed for overload.
(2) Display mode: Liquid crystal display; maximum display:
1999；
(3) Sampling rate: 2.5 times per second；
(4) The meter can display actual insulation test voltage. LED
light is used to indicate high voltage output status；
(5) Operating environment: 0C-40C, less than 75%RH；
(6) Storage environment:-10C-60C, less then 80%RH；
(7) Indication for insufficient battery capacity: “
-
+
” is
displayed；
(8) Power Supply: 9V battery, 6F22 or NEDA 1604
(9) Operating Temp.: 0℃ to 40℃ (relative humidity <75%)
(10) Storage Temp.:-10℃ to 50℃ ((relative humidity <85%)
(11) Dimension: 69x138x31mm(with holster)
(12)Weight: approx. 170g (including battery)
V. Technical characteristics and operating description of
the insulation tester
Accuracy is specified for a period of year after calibration
and at 18℃ to 28℃ (64℉ to 82℉) with relative humidity to
75%.
VI. Usage for insulating resistance measurement
Danger: If there is any measurement error, it may cause
personal injury and meter failure. Operate it only after read
the operating instructions carefully and thoroughly. Our
company will take no responsibility for the accident not
caused due to any reason of our company.
Rated voltage
250V/500V/1000V
Open circuit voltage
90%~110% of the rated voltage
Measurement range
0.001~1999M
Ω
Minimum Resolution
0.001 M
Ω
Accuracy
±(5%RDG+5)
The measurement
resistance value that can
maintain lower limit of
the rated voltage
250V
：
about 500k
Ω
500V
：
about 1.5M
Ω
1000V： about 5MΩ
short circuit current
Not less than 1.5mA

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Operating description
1. Safety information
1) Watch out for high-voltage electric shock. When
completing the insulating resistance test, remove the test cable
only after making sure high voltage across the tested object is
less than 50V.
2) During measurement, do not touch the object under test
and watch out for high-voltage electric shock.
3) When test the insulating resistance, the object should
not be electrified. Make sure the to-be-tested object is securely
earthed. Before test, it is necessary to short-circuit and
discharge two test terminals of the to-be-tested object.
4) When test the insulating resistance, make sure no
external voltage is applied to the test circuit.
5) Before starting test, make sure position of the range
switch knob is correct and the test cable is securely connected.
6) After press the high voltage key, high voltage from
250V to 1000V will be output between L terminal and E
terminal (depending on different models and positions). Here,
be sure not to touch the meter and exposed part of the object
under test. Otherwise, danger of electric shock would occur.
2． Insulating resistance test
1) Connection of the test terminals
Insert one red the test pen into L terminal socket of the
meter. Insert one end of the test cable with a red test clamp
into E terminal socket of the meter. Insert one end of the test
cable with a black test clamp into G terminal socket of the
meter. Make a good connection respectively.
2) Test connecting cable
Connecting cable of E terminal socket of the meter is
earthing cable；
Connecting cable of L terminal socket of the meter is circuit
cable；
Connecting cable of G terminal socket of the meter is
shielding cable and connected to surface of the to-be-tested
object to prevent surface leakage and affect impedance test.
3) Rated voltage selection
Select a rated voltage you need in the insulating resistance
test. Turn the range switch knob to a corresponding voltage
position.
4) Connect pen of the test bar to another terminal of the
to-be-tested object. Press high voltage switch
(TEST/STOP). Here, the red indicator light turns on,
indicating high voltage output for test is connected. Actual
high voltage value can be displayed in the meter. After
the test is started, numerical value is displayed in the
meter.
Attention: do not short-circuit the two test pens with high
voltage output or take measurement of insulating resistance
after high voltage is output. The improper operation is very
easy to generate spark, cause fire disaster, and damage the
meter.
Special attention in operation:
Before test, make sure the to-be-tested circuit is not
electrified. Do not take measurement of any electrified
equipment or electrified circuit. During test, dangerous
voltage output exists in the meter. Be sure to operate it
carefully. Ensure the to-be-tested object is securely clamped
and keep your hands away from the test clamp before press
TEST key to output high voltage.
Attention in operation:
When use 500V measurement voltage to measure resistance
less than 1.5MΩ, 1000V to measure resistance less than 5MΩ,
measurement time must not exceed 10 seconds.
5) Power off
After the test, the release of high-voltage switch (TEST /
STOP), put out the red indicator light, said high-voltage
output has been disconnected.
Range will switch to the OFF position rotation, LCD
screen shows no. The capacitive load, should be first tested
on the target residual charge-finished,to prevent residual
discharge wounding charge, and then removed the test
line, testing completed
VII．Maintenance of the meter
Warning！ It is necessary to turn the power off and
disconnect test pens before open the case of the meter or
battery cover to prevent danger of electric shock.
1. When the sign “
-
+
” is displayed in the meter, the battery
needs to be changed. Open the battery cover, and replace
the old battery with a new one of the same type to ensure
the meter works normally.
2. Keep the meter and the test pens clean, dry, and undamaged.
Use a clean cloth or eradicator to clean the case of the meter.
Do not use abrasive or organic solvent.
3. Avoid mechanical damage, shock, and impact; avoid
exposure to high temperature and strong magnetic field.
VIII． Accessories
1. Test cable: one set.
2. Operating instructions: one copy
3. Conformity certificate/Warranty card: one piece