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參數(shù)資料
| 型號(hào)： | BMM80 |
| 英文描述： | INSULATION TESTER/MULTIMETER |
| 中文描述： | 絕緣測(cè)試儀/萬用表 |
| 文件頁(yè)數(shù)： | 3/6頁(yè) |
| 文件大?。?/td> | 257K |
| 代理商： | BMM80 |
MEGGER BMM SERIES MULTI-MEGGERS
Nonvolatile memory (BMM2500 and
BMM2580 models) stores data and
protects it in the event of battery re-
moval or failure.
Continuous data logging facility
monitors slowly-changing parameters
and permits additional test such as
Polarization Index (models BMM2500
and BMM2580).
The included accessory, SP1 switch
probe, allows measurements be made
when both hands are needed to hold
the probe.
Capacitance measurement range
(BMM80, BMM2080, and BMM2580)
addresses a critical telecom testing
need.
Extremely sensitive insulation resis-
tance measurement (up to 200 G
)
can detect changes at high levels that
may indicate future problems in the
insulation.
Insulation measurement result can
be expressed in terms of leakage cur-
rent for end users needing this infor-
mation.
APPLICATIONS
Electrical Contractors
The BMM Series multi-MEGGERS are
ideal for testing electrical installations.
The BMM2500 and BMM2580 provide
the electrical contractor with the ulti-
mate tool for testing/commissioning
fixed installations.
The on-board storage capability of the
BM2500 series enable each test result
to be assigned to particular distribu-
tion board and circuit references. Data
may be later recalled to the display for
manual completion of certificates of
test or for maximum performance
downloaded to a printer or PC. The
inclusion of a backlight ensures that
the display can be clearly seen even
where the distribution board is lo-
cated in a dark cupboard without ruin-
ing battery life.
Up to five insulation test voltages (de-
pending on model) between 50 and
1000 V are provided to ensure that the
correct test voltage for the installation
under test is available. The 500 V range
is suitable for the majority of testing
on circuits with a nominal voltage up
to 500 V. The 250 V or below insulation
ranges are necessary where low volt-
age circuits supplied by an isolating
transformer are tested, while the 1000
V range is used for circuits with a nomi-
nal voltage exceeding 500 V and below
1000 V. An additional leakage facility
(not available on the BMM80) allows
any insulation measurement to be dis-
played in terms of microampere (
μ
A)
leakage currents.
The instruments have a 200 mA conti-
nuity range which is ideal for testing
the continuity of ring final circuit con-
ductors, primary bonding of services
and of supplementary bonding con-
ductors. The zero offset adjustment
allows the resistance of the test leads
to be ignored so the measurement
shown is due to the conductors under
test only.
The feature set of the BMM2000 and
BMM2500 Series extends to include
measurement ranges for voltage, cur-
rent, resistance, and frequency en-
abling one instrument to be used
where normally a separate multimeter
would be required.
Servicing and HVAC
The BMM2000 and BMM2500 Series
offer features addressing the require-
ments of the service engineer in a
single unit, including the testing of do-
mestic appliances. The combination
of multiple voltage insulation test, con-
tinuity, and mV transducer inputs ca-
ter for the testing of motors, timers,
earth bonding, solenoids and relays,
valves, and PCB components.
The insulation ranges are useful for
establishing the integrity of the inter-
nal parts such as motors, timers and
transformers, while the continuity
range can verify the correct earth
bonding of the case metalwork and
check the operation of switches, etc.
The option of attaching any mV output
temperature measuring transducer
extends the measurement range of the
BMMs to measurement of water, air,
pipe, and surface temperatures mak-
ing the instruments ideally suited for
the servicing of ovens, washing ma-
chines, and HVAC systems. The unique
mV transducer input ranges enable the
BMM Series to interface to transduc-
ers for measurement of the various
parameters necessary during servic-
ing and in the commissioning and veri-
fication of HVAC systems.
The multimeter functions of voltage,
current, resistance, and frequency find
a number of uses in the measurement
of component parts within appliances
such as the verification of correct
power supplies, timer switching char-
acteristics, and component level mea-
surement on control PCBs.
Telecommunications
In addition to the standard installation
testing functions, the BMM2080 and
BMM2580 include additional 50 V and
100 V insulation testing facilities and a
10
μ
F capacitance range. The low volt-
age insulation tests are necessary for
the testing of delicate components
and equipment found in telecom sys-
tems that would be damaged by higher
voltages.
The instruments are designed to per-
form tests on systems with up to 25 V
of electrical interference or crosstalk
without the accuracy or reliability of
results being affected and with no
damage to the instrument.
A wide resistance measuring capabil-
ity enables a degree of cable fault pre-
location to be performed by using
resistance to fault methods. Addition-
ally the wide voltage ranges allow ac-
curate measurement of line and
battery voltages.
Data Logging
(BMM2500 Series Only)
The advanced data logging facilities of
the BMM2500 and BMM2580 enable a
log of measured values at regular
presettable intervals for any of the
measured parameters (i.e. voltage, ca-
pacitance, insulation resistance). In
the case of insulation resistance, the
logging facility enables calculations of
Dielectric Absorption Ratios and Po-
larization Index (PI). The PI is defined
as the ratio between the insulation re-
sistance values after 1 minute and 10
minutes. This calculation is useful for
determining insulation quality without
the need for temperature compensa-
tion or necessary referral to historic
test data.
SPECIFICATIONS
All quoted accuracies are at 68
°
F (20
°
C)
Insulation Ranges
Measuring Range
BMM2000 and BMM2500:
0.01 M
to 20 G
(0 - 100 G
on analog scale)
BMM80, BMM2080 & BMM2580:
0.01 M
to 200 G
(0 - 100 G
on analog scale)
EN61157 Operating Range
0.10
to 99.9 M
Test Voltage Accuracy
+15% maximum on open circuit
Short circuit current
< 2 mA
Test Current on Load
1 mA at min. pass value of insulation
specified in BS7671, HD384 and IEC
364, 2 mA max.
Accuracy
±
2%
±
2 digits
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