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AVO / Megger DLRO 10 Digital Microhmmeter
The AVO / Megger DLRO 10 sets the standard
for low resistance measurement. The AVO DLRO 10 is a fully automatic
instrument, selecting the most suitable test current up to 10A d.c. to
measure resistance from 0.1 µΩ to 2000 Ω, on one of seven
ranges.
The Megger DLRO 10 instrument is built into
a strong, lightweight case that is equally at home in the field or in the
laboratory. Light enough to be worn around the neck, it is small enough to
be taken into areas that were previously too small to access.
Features:
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Small, lightweight and portable - can
be used in tight places, reduces the need for extra long leads and two
person operation.
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Four terminal resistance method shows
the true resistance of the item under test.
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Bright LED displays are easily visible
under all lighting conditions and reduce human error.
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Automatically applies forward and
reverse currents which cancel out any standing voltages across the
sample under test.
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Checks for undue noise during
measurement, reducing the possibility of recording the incorrect
result.
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Automatically detects continuity in P
and C circuits, preventing erroneously high reading to be taken due to
high resistance contact.
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Battery module has a battery condition
indicator allowing the user to check the state of spare batteries
without connecting to the instrument.
Applications:
The needs for accurate low resistance
measurement are well known and very diverse. They range through Goods
Receiving inspection of components to ground bonding and welded joints.
Typical applications include, but are not limited to, making d.c.
resistance measurements of:
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Switch and contact breaker resistance
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Busbar and cable joints
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Aircraft frame bonds and static control
circuits
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Integrity of welded joints
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Inter-cell connections on battery
systems up to 600 V peak
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Quality control of resistive components
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Transformer and motor winding
resistance
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Rail and pipe bonds
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Metal alloys, welds and fuse resistance
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Graphite electrodes and other
composites
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Wire and cable resistance
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Transmitter aerial and lightning
conductor bonding
Specifications |
| Measurement |
| Mode |
Manual, Auto, Continuous, High Power |
| Control |
Fully
Automatic |
| Speed |
<3s
for forward & reverse current and to display average |
| Display |
| Measurement |
41/2
digit seven segment LED |
| Range
and Safety |
LED
indication |
| Test
Method |
Single
cycle reversing d.c. ratiometric measurement -average result
display. |
| Test
Current |
| Accuracy |
±10% |
| Stability |
<10
ppm per second |
| Maximum
Lead Resistance |
100
mΩ total for 10A operation irrespective of battery condition. |
| Voltmeter
input impedance |
>
200 kΩ |
| Hum
rejection |
Less than 1% ±20 digits additional
error with 100 mV peak 50/60 Hz. on the potential leads. Warning
will show if hum or noise exceeds this level. |
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