Megger BM122 Bruksanvisning
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SAFETY WARNINGS
✱Safety Warnings and Precautions be readmust
and understood before the instrument is used.
They
must be observed during use.
✱The circuit under test must be switched o, de-
energised and isolated
before Insulation or
Continuity tests are made.
✱The test push button must not be held down while
connecting the test leads.
✱During an insulation test, the circuit must not be
touched.
✱After insulation tests, capacitive circuits must be
allowed to discharge
before disconnecting the test
leads.
✱Test leads, prod and crocodile clip be inmust
good order; clean, and with no broken or cracked
insulation.
✱Replacement fuses must be of the correct size,
type and rating.
MBM121 BM122and
Insulation & Continuity Testers
User Guide
Guide de l’utilisateur
Gebrauchsanleitung
Guía del usuario
Symbols used on the instrument
Caution: Risk of electric shock
Caution: refer to acompanying notes.
Equipment protected throughout by Double Insulation (Class II).
Equipment complies with current EU Directives
NOTE
THE INSTRUMENTS MUST ONLY BE USED BY SUITABLY TRAINED AND COMPETENT
PERSONS
.
DISPLAY FEATURES
OPERATION
When briefly pressed and released, the instrument’s single control button
switches the instrument ‘
On Continuity’and selects mode. The Continuity test
automatically activates when the test leads make contact. Pressing and holding
the button selects
Insulation mode.
Preliminary Test lead check
1. Before each use of the instrument, visually inspect the test leads to
conrm that their condition is good, with no damaged or broken
insulation.
2. Check continuity of the test leads by rmly shorting the leads together
and read the test lead resistance measurement directly from the
display.
Continuity Testing
1 Turn the instrument by briefly pressing and releasing the test button.‘On’
2 Firmly connect the test leads together and note their combined
resistance value.
3. Connect the test leads across the circuit under test.
4. Take the reading directly from the displayed Continuity
range.(Max.99,9Ω).
5. Subtract the test lead resistance value from the measured reading.
Insulation Testing
1. Turn the instrument by briefly pressing and releasing the test button‘On’
2. Firmly connect the test leads to the isolated item / circuit under test.
3. Press and hold the test button; the display changes to the
MΩrange
and shows the insulation value. As an additional safety feature the
BM122 display flashes its symbol before performing the test.‘1000V’
4. Release the test button before removing the test leads (to enable the
instrument to discharge the circuit under test).
SPECIFICATION
INSULATION
BM121 BM122
Nominal Test Voltage: 500V dc 1000V dc
Test Voltage Accuracy: -0% +30% (0°C to 30°C) into 0 to 1mA load
Measuring Range: 0,01MΩ- 999MΩ
Short Cct. Current: Less than 2mA
Accuracy (at 20°C): ± 3% ±2 digits up to 10MΩ
± 5% ±2 digits up to 100MΩ
± 30% up to 999MΩ
CONTINUITY
Measuring Range:
0,01Ω- 99,9Ω
Open Cct. Voltage: 5V ±1V
Low
Battery
1000V
Fuse
Ruptured
1000V
Refer to Safety Warnings before using the instrument
Accuracy (at 20°C): 0,01W- 9,99Ω± 3% ±2 digits(ISC =210mA)
10
W W- 99,9 ± 5% ± 2 digits (I
SC
=21mA)
Temperature Coecient: <0,1% per °C
Temperature Range:
Operating:
-0°C to +40°C (full measurement range)
-20°C to +60°C (to 100 MΩmaximum)
Storage: -25°C to +65°C
Humidity: 90% RH at 40°C max
Display: 3 digit L.C.D. Maximum reading 999
Auto Shut o:Auto shut o operates after 5 minutes of
inactivity by the instrument.
Default Voltage Warning:
The circuit under test must be switched o, de-energised and isolated before
making any tests. If an external voltage >25V (ac or dc) is detected, normal
testing is inhibited and the display ashes a ‘V’Caution:warning. This
warning does not function if the instrument is ‘or if the battery isO’
exhausted.
Automatic Discharge:
Capacitive circuits will be automatically discharged when the test button is
released following an insulation test (Internal 360 kΩresistance).
Power Supply: 6 x 1,5V cells IEC LR6 (AA) type only.
Battery life: Typically 2000, 5 second operations (worst case).
Note: Battery cells should not be left in an instrument which
may remain unused for extended periods of time.
Low Battery: The low battery indicator symbol will appear
when the battery cells are exhausted.
Battery Replacement: The rear cover must not be opened if the test leads
are connected. To remove the rear cover, release the screw at the bottom of
the cover and lift the cover upwards. To avoid the possibility of shock, do not
press the test button or touch the fuse when changing battery cells.
Fuse: 500 mA (F) H.B.C.10 kA min (32mm x 6mm).
To check this fuse, open circuit the test leads and press the test button until
a reading is obtained. Display of the fuse symbol , or an error code
indicates a ruptured fuse. Located under the rear cover, this fuse can be
replaced by the user. The rear cover
must not be opened if the test leads
are connected. The replacement fuse be of the correct type and rating.must
To avoid the possibility of shock, disconnect the battery touching thebefore
fuse.
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
0,01MΩ
0,1MΩ
1,0MΩ
10MΩ
100MΩ
Load
Terminal Voltage
0.5MΩ
BM122
BM121
0,2MΩ
0,5M 1MΩ Ω
2MΩ
5MΩ
0,2MΩ
0,5MΩ
1MΩ
2MΩ
5MΩ
10MΩ
Minimum Indicated Value
Terminal Characteristics
Limiting Value Curve
Produktspecifikationer
| Varumärke: | Megger |
| Kategori: | mätning |
| Modell: | BM122 |
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