Order Online www.BiddleMegger.com DLRO 10 and DLRO 10X Digital Microhmmeter nAuto current reversal cancels standing emfs nProtected to 600 V nAutomatically detects continuity in potential and current connections nMultiple operating modes including fully automatic nAlpha-numeric keypad for entering test notes (DLRO 10X) nUser selectable high and low limits (DLRO 10X) nPrinter output and memory (DLRO 10X) To assist operator safety and ease of use, both instruments are DESCRIPTION supplied complete with a pair of duplex handspikes with 1.2 m DLRO 10 and DLRO 10X set the standards for low resistance (4 ft) leads. One of the probes is fitted with LED’s, which measurement. DLRO 10 and DLRO 10X are fully automatic duplicate indicators on the instrument display indicating that all instruments, selecting the most suitable test current up to 10A d.c. four contacts have been made, the presence of a high voltage to measure resistance from 0.1 μΩ to 2000 Ω, on one of seven across the load, and the presence of current flow while a load is ranges. discharging. A full range of test leads is available with probes, clamps and Kelvin clips. For users who desire more control over the measurement process, DLRO 10X uses a menu system controlled by a two-axis paddle to Nickel Metal Hydride (NiMH) batteries power the instruments. allow the user to manually select the maximum test current. The battery packs are interchange-able so that an exhausted battery may be recharged using the external charger supplied DLRO 10X also adds real time download of results and on board while testing continues using a spare pack. Although full charging storage for later download to a PC. will take 4 hours, a fast charge mode allows the battery to be 90% Both instruments are built into a strong, lightweight case that is charged within 2 1/2 hours from a 12 volt battery or from a equally at home in the field or in the laboratory. Light enough to standard 120/230 V AC supply via the supplied charger. The be worn around the neck, they are small enough to be taken into battery pack contains its own battery state indicator, which allows areas that were previously too small to access. the charge-state to be monitored, even without being connected to the instrument. DLRO 10 uses a large, bright 4 1/2 -digit LED display while DLRO 10X has a large, backlit LCD display. Normally, measurements are DLRO 10X is fitted with RS232 communications that will allow made with forward and reverse currents to cancel the effects of results to be downloaded in real time or stored for later retrieval. any standing voltages across the test sample. Up to 700 sets of results may be stored within DLRO 10X The average value is then displayed within 3 seconds, to a basic complete with notes containing up to 200 characters which may accuracy of 0.2%. DLRO 10X displays both forward and reverse be added using the on board keypad. These results can also be measurements as well as the average of the two. downloaded to a PC. DLRO 10X allows the user to set high and low pass limits, thereby MEASUREMENT MODES: enabling simple go-no-go testing. A variety of measurement modes are available. Since the introduction of V2.0 firmware, Normal, Auto, Continuous and At the end of a test DLRO10X will store the test results, as well as Inductive mode are available on both the DLRO 10 and the any notes relevant to the test. DLRO 10X. DLRO 10 AND DLRO 10X Digital Microhmmeter DLRO 10 will display the average of the measurements achieved FEATURES AND BENEFITS using forward and reverse current, while DLRO 10X displays both nSmall, lightweight and portable - can be used in tight places, individual measurements and the average. reduces the need for extra long leads and two person Normal mode initiates a test by pressing the Test button on the operation. instrument front panel after connecting the test leads. Continuity nFour terminal resistance method shows the true resistance of of all four connections is checked, forward and reverse currents the item under test. are applied. nBright LED (DLRO 10) and LCD (DLRO 10X) displays are easily Auto mode allows forward and reverse current measurements to visible under all lighting conditions and reduce human error. be made and the average displayed simply by making contact nAutomatically applies forward and reverse currents which cancel with all four probes. This mode is ideal when working with the out any standing voltages across the sample under test. supplied handspikes. Each time the probes are removed and nChecks for undue noise during measurement, reducing the reconnected to the load another test will be performed without possibility of recording the incorrect result. the need to press the test button on the instrument. nAutomatically detects continuity in P and C circuits, preventing Continuous mode allows repeated measurements to be made on erroneously high reading to be taken due to high resistance the same sample. Simply connect the test leads and press the test contact. button. The measurement is updated every 3 seconds until the nBattery module has a battery condition indicator allowing the circuit is broken. user to check the state of spare batteries without connecting to Inductive mode is intended for use when measuring inductive the instrument. loads. When measuring inductive loads it is necessary to wait for nRS232 connector on the DLRO 10X allows downloading of the voltage to stabilise. This means that the measurement could results in real time or stored for later retrieval. 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. Unidirectional mode, on DLRO 10X only, applies a current in one direction only. This does not enable any standing emfs to be negated but speeds up the measurement process. Test starts automatically when probes are connected. 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: nSwitch and contact breaker resistance nBusbar and cable joints nAircraft frame bonds and static control circuits nIntegrity of welded joints nInter-cell connections on battery systems up to 600 V peak nQuality control of resistive components nTransformer and motor winding resistance nRail and pipe bonds nMetal alloys, welds and fuse resistance The DLROs are light enough to be worn around the neck. They nGraphite electrodes and other composites are also small enough to be taken into areas which were nWire and cable resistance previously too cramped for easy testing. nTransmitter aerial and lightning conductor bonding DLRO 10 AND DLRO 10X Digital Microhmmeter Full Scale Volts Test Current Full Scale Resolution Accuracy Inductive Resistive Inductive Resistive 1.9999 mΩ 0.1 μΩ ±0.2% ±0.2μΩ n/a 20 mV n/a 10 A 19.999 mΩ 1 μΩ ±0.2% ±2 μΩ 20 mV 1 A 20 mV 1 A 10 μΩ ±0.2% ±20 μΩ 199.99 mΩ 20 mV 200 mV 100 mA 1 A 1.9999 Ω 100 μΩ ±0.2% ±0.2 mΩ 200 mV 100 mA 20 mV 10 mA 1 mΩ ±0.2% ±2 mΩ 19.999 Ω 20 mV 200 mV 1 mA 10 mA 199.99 Ω 10 mΩ ±0.2% ±20 mΩ 200 mV 1 mA 20 mV 100 μA 100 mΩ ±0.2% ±0.2 Ω 1999.9 Ω 200 mV 200 mV 100 μA 100 μA DLRO 10 DLRO 10X Measurement: Mode: Manual, Auto, Continuous, Manual, Auto, Continuous, High Power High Power, Unidirectional Control: Fully Automatic Fully Automatic/Manual Speed: <3s for forward & reverse current and to display average Display: Measurement: 41/2 digit seven segment LED Range and Safety: LED indication Large backlit LCD 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. Real Time or from storage via RS232 Data: Transfer: Storage: 700 tests Up to 256 characters per test via integral Memo Field alphanumeric keypad 7 Ah NiMH rechargeable Battery: Capacity: Life: Typically 1000 x 10 A tests before recharge Recharge: Via External 90V - 260V 50/60 Hz charger or from 12 to 15V d.c. supply Charging Rate: Standard: 2.5 hours to 90% capacity, 4 hrs for full charge Temperature: Operation: +5ºC to +45ºC (41ºF to 113ºF) at full specification Storage: -10ºC to +50ºC (14ºF to 122ºF) at reduced accuracy Calibration: -30ºC to +70ºC (-22ºF to 158ºF)20ºC (68ºF) <0.01% per ºC over range 5ºC to 40ºC Co-efficient: Slow charging: <0.01% per ºC from 5ºC to 40ºC (<0.006% per oF from 41ºF to 104ºF) Fast charging: 0ºC to +45ºC (32ºF to 113ºF) Humidity (max): +10ºC to +45ºC (50ºF to 113ºF) Altitude (max): 90% RH @ 40ºC (104ºF) non-condensing Safety: 2000m (6500 ft) to full safety specifications In accordance with EN61010-1 600V Category III EMC: The instrument meets EN50081-1 and EN50082-1 (1992) Dimensions: 220 x 100 x 237 mm (8.6 x 4 x 9.5 in) Weight: 2.6 kg (5 3/4 lb.) including battery module. DLRO 10 AND DLRO 10X Digital Microhmmeter ORDERING INFORMATION Item (Qty) Order No. Item (Qty) Order No. DLRO 10 Digital Low Resistance Ohmmeter DLRO-10 Straight Duplex Handspikes (2) DLRO10X Digital Low Resistance Ohmmeter DLRO-10X Heavy Duty with fixed contacts. 2m/7ft 242002-7 Complete with 5.5m/18ft 242002-18 7 Ah NiMH battery module. 6340-101 9m/30ft 242002-30 DH4 Duplex handspikes (2), Duplex Heavy Duty 5cm (2") one with indicator lights. 1.2m / 4 ft 6111-503 C-Clamps. (2) 2m/7ft 242004-7 Battery charger for operation from 115/230 V . 5.5m/18ft 242004-18 50/60Hz supply. 6280-333 9m/30ft 242004-30 Cigar lighter adapter for battery charging. 6280-332 Duplex handspikes with replaceable User guide. 6172-473 Needle Points 2m/7ft 242003-7 Warranty book. 6170-618 Duplex 1.27 cm (1/2 ") Optional Accessories at extra cost Kelvin Clips. (2) gold plated 2m/7ft 241005-7 Carrying case for DLRO10/10X silver plated 2m/7ft 242005-7 and all standard accessories. 6380-138 Duplex 3.8 cm (11/2") Carrying case for optional lead sets. 18313 Kelvin Clips. (2) 2m/7ft 242006-7 Calibration Shunt,10 Ω, current rating 1 mA. 249000 5.5m/18ft 242006-18 Calibration Shunt, 1 Ω, current rating 10 mA. 249001 9m/30ft 242006-30 Calibration Shunt, 100 mΩ current rating 1A. 249002 Single Leads Calibration Shunt, 10 mΩ current rating 10 A. 249003 Single handspike (1) for Certificate of Calibration for Shunts, NIST CERT-NIST potential measurement. 2m/7ft 242021-7 Replacement tips for DH4, DH5: 5.5m/18ft 242021-18 Needle point 25940-012 9m/30ft 242021-30 Serrated end 25940-014 Current clip (1) for current Optional Test Leads at extra cost connections. 2m/7ft 242041-7 Duplex Leads 5.5m/18ft 242041-18 DH5 straight duplex handspikes (2). 9m/30ft 242041-30 One has indicator lights. 2.5m/8ft 6111-517 Duplex Handspikes (2) with spring loaded helical contacts. 2m/7ft 242011-7 5.5m/18ft 242011-18 9m/30ft 242011-30 Registered to ISO 9001:2000 Reg no. Q 09290 MeterCenter 2046 West Peninsula Circle Registered to ISO 14001 Reg no. EMS 61597 Chandler, AZ 85248 USA DLR10_DLRO10X_DS_en_V10 Telephone (480) 659-8351 Megger is a registered trademark Toll Free (800) 230-6008 Fax (480) 659-8361 Websites www.BiddleMegger.com www.MeterCenter.com Email Sales@BiddleMegger.com