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Megger DLRO 10 Low Resistance Digital OhmMeter
Fully automatic instrument, selecting the most suitable test current up to 10 A d.c. to measure resistance from 0.1 μΩ to 2000 Ω, on one of seven ranges
Includes Carrying Case & Accessories As Listed Above!
Working Condition: Excellent
Condition: Refurbished
Calibrated: Yes
Warranty: 1 YEAR WARRANTY
Megger DLRO 10
DLRO 10 and DLRO 10X set the standards for low resistance measurement. DLRO 10 and DLRO 10X are fully automatic instruments, selecting the most suitable test current up to 10 A d.c. to measure resistance from 0.1 μΩ to 2000 Ω, on one of seven ranges.
For users who desire more control over the measurement process, DLRO 10X uses a menu system controlled by a two-axis paddle to allow the user to manually select the maximum test current.
DLRO 10X also adds real time download of results and on board storage for later download to a PC.
Both instruments are 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, they are small enough to be taken into areas that were previously too small to access.
DLRO 10 uses a large, bright 4 1/2 -digit LED display while DLRO 10X has a large, backlit LCD display. Normally, measurements are made with forward and reverse currents to cancel the effects of any standing voltages across the test sample.
The average value is then displayed within 3 seconds, to a basic accuracy of 0.2%. DLRO 10X displays both forward and reverse measurements as well as the average of the two.
DLRO 10X allows the user to set high and low pass limits, thereby enabling simple go-no-go testing.
At the end of a test DLRO10X will store the test results, as well as any notes relevant to the test.
To ensure customers are able to choose the best test leads to suit their application, the DLRO10 and DLRO10X may be purchased in one of two packages. The first option is supplied with a pair of duplex handspikes with 1.2 m (4 ft) leads, the second option is supplied without test leads to allow customers to order exactly the test leads they require from the accessory list.
The instruments are supplied as standard with a Nickel Metal Hydride (NiMH) battery pack. The battery packs are interchange-able so that an exhausted battery may be recharged using the external charger supplied while testing continues using a spare pack. Although full charging will take 4 hours, a fast charge mode allows the battery to be 90% charged within 2 1/2 hours from a 12 volt battery or from a standard 120/230 V AC supply via the supplied charger. The battery pack contains its own battery state indicator, which allows the charge-state to be monitored, even without being connected to the instrument.
In addition an optional mains / line power supply, the DLRO10LPU is available. This enables the instruments to be directly powered from 90V to 264V, 50/60Hz ideal for repetitive testing applications such as manufacturing production line use.
DLRO 10X is fitted with RS232 communications that will allow results to be downloaded in real time or stored for later retrieval.
Up to 700 sets of results may be stored within DLRO 10X complete with notes containing up to 200 characters which may be added using the on board keypad. These results can also be downloaded to a PC.
MEASUREMENT MODES:
A variety of measurement modes are available. Since the introduction of V2.0 firmware, Normal, Auto, Continuous and Inductive mode are available on both the DLRO 10 and the DLRO 10X.
DLRO 10 will display the average of the measurements achieved using forward and reverse current, while DLRO 10X displays both individual measurements and the average.
Normal mode initiates a test by pressing the Test button on the instrument front panel after connecting the test leads. Continuity of all four connections is checked, forward and reverse currents are applied.
Auto mode allows forward and reverse current measurements to be made and the average displayed simply by making contact with all four probes. This mode is ideal when working with the supplied handspikes. Each time the probes are removed and reconnected to the load another test will be performed without the need to press the test button on the instrument.
Continuous mode allows repeated measurements to be made on the same sample. Simply connect the test leads and press the test button. The measurement is updated every 3 seconds until the circuit is broken.
Inductive mode is intended for use when measuring inductive loads. When measuring inductive loads it is necessary to wait for the voltage to stabilise. This means that the measurement could take a few seconds or several minutes. The test leads are firmly connected to the item to be measured and the Test button is pressed. The instrument will pass a current through the sample and wait for the voltage to stabilise. If possible the current will be increased. This procedure will be repeated until the voltage detected falls into the range 15 mV to 200 mV. The instrument will then continue to take readings, which will gradually decrease to the true value as the voltage stabilises further. The operator decides when the result is stable and presses the test button to terminate the test. Measurement is made with forward current only.
APPLICATION
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:
- Switch and contact breaker resistance
- Busbar and cable joints
- Aircraft frame bonds and static control circuits
- Integrity of welded joints
- Inter-cell connections on battery systems up to 600 V peak
- Quality control of resistive components
- Transformer and motor winding resistance
- Rail and pipe bonds
- Metal alloys, welds and fuse resistance
- Graphite electrodes and other composites
- Wire and cable resistance
- Transmitter aerial and lightning conductor bonding
Features & benefits
- Small, lightweight and portable - can be used in tight places, reduces the need for extra long leads and two person operation.
- Four terminal resistance method shows the true resistance of the item under test.
- Bright LED (DLRO 10) and LCD (DLRO 10X) displays are easily visible under all lighting conditions and reduce human error.
- Automatically applies forward and reverse currents which cancel out any standing voltages across the sample under test.
- Checks for undue noise during measurement, reducing the possibility of recording the incorrect result.
- Automatically detects continuity in P and C circuits, preventing erroneously high reading to be taken due to high resistance contact.
- Battery module has a battery condition indicator allowing the user to check the state of spare batteries without connecting to the instrument.
Specifications:
| Measurement mode |
DLRO 10: Manual, Auto, Continuous, Inductive |
| Measurement control |
DLRO 10: Fully Automatic |
| Measurement speed |
<3s for forward and reverse current and to display average |
| Display |
Measurement : 4 1 / 2 digit seven segment LED
Range and safety: DLRO10 LED indications |
| Test method |
Single cycle reversing d.c. ratiometric measurement -average result display |
| Test current accuracy |
±10% |
| Test current stability |
<10 ppm per second |
| Lead resistance |
Maximum 100 mΩ total for 10 A operation irrespective of battery condition. |
| Voltmeter input impedance |
>200 kΩ |
| Noise 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. |
| Maximum altitude |
2000m (6562 ft) to full safety specifications |
| Battery type |
7Ah NiMH rechargeable |
| Battery life |
Typical 1000 x 10 A tests before recharge |
| Battery charge time |
Via external 90 V - 260 V 50/60 Hz charger from 12 to 15 V dc supply
Standard: 2.5 hours to 90% capacity, 4 hours to fully charged
Slow Charge: +10 °C to +45 °C (50 °F to 113 °F) |
| Operating temperature range and humidity |
+5 °C to +45 °C (41 °F to 113 °F) at full accuracy
-10 °C to +50 °C (14 °F to 122 °F) at reduced accuracy
<90% RH @ 40 °C (104 °F) noncondensing |
| Storage temperature range and humidity |
30 °C to +70 °C (50 °F to 113 °F)
<90% RH @ 40 °C (104 °F) noncondensing |
| Temperature co-efficient |
<0.01% per °C, over range 5 °C to 40 °C (<0.0006% per °F from 41 °F to 104 °F) |
| Safety |
In accordance with IEC61010-1, CATIII 600 V - only when DH6 leads are used. |
| EMC |
IP65 case closed, IP54 battery operation In accordance with IEC61326-1 (Heavy industrial) |
| Dimensions |
220 x 100 x 237 mm |
| Weight |
2,6 kg inclusiv blocul acumulator |
For full Megger DLRO 10 product specifications, please click here: Megger DLRO 10
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