Megger DLRO10X Low Resistance Ohmmeter

The Megger DLRO 10X is a fully automatic instrument, selecting the most suitable test current, up to 10 A dc to measure resistance from 0.1 ?Ω 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 manual selection of the test current. A resistance measurement takes approximately 2.5 seconds and comprises a measurement with forward current, reverse current and a display of the average. On the DLRO 10X all three values are displayed, and optionally, the measurement may be limited to forward current only. All the controls needed to set up and operate megger DLRO 10X are located on the top panel of the instrument. To the left of the large LCD display are the controls for moving around the display, controlling the menuing system and adjusting the display contrast and backlight. To the right of the display is the large Test button, Power On/Off button and an alphanumeric keypad for entering notes relating to a test which will be stored with the test results for later reference. The DLRO10X is powered by a rechargeable Nickel Metal Hydride (NiMH) battery, which permits one thousand 10 Amp tests to be completed on a single charge. The battery module contains intelligent circuitry, which prevents damage to the battery from overcharging, and a battery state indicator. A removable lid that is hinged at the back and held closed by magnetic catches covers the top panel. This lid may be removed if required by opening fully and snapping out of its hinges. Up to 700 sets of results may be stored within Megger DLRO 10X complete with notes containing up to 200 characters which may be added using the on board keypad. FEATURES Accurate results in under three seconds. Auto current reversal cancels standing emfs. Fuse protected to 600 V. NiMH battery reduces weight. 250 mW power limit (with optional override) to avoid heating the test sample. Automatically detects continuity in potential and current connections. Visible warning of high voltages present at the terminals. Visible warning of current flowing in the test sample. Multiple operating modes including fully automatic. Alpha-numeric keypad for entering test notes. User setable high and low limits. Autoranging with Manual option. Printer output and memory. Functionality Table Resistance Ranges Full Scale Volts Test Current Full Scale Resolution Accuracy* Resistive Inductive Resistive Inductive 1.9999 mΩ 0.1 µΩ +0.2% +0.2µΩ 20 mV n/a 10 A n/a 19.999 mΩ 1 µΩ +0.2% +2 µΩ 20 mV 20 mV 1 A 1 A 199.99 mΩ 10 µΩ +0.2% +20 µΩ 20 mV 200 mV 100 mA 1 A 1.9999 Ω 100µΩ +0.2% +0.2 mΩ 20 mV 200 mV 10 mA 100 mA 19.999 Ω 1 mΩ +0.2% +2 mΩ 20 mV 200 mV 1 mA 10 mA 199.99 Ω 10 mΩ +0.2% +20 mΩ 20 mV 200 mV 100 µA 1 mA 1999.9 Ω 100 mΩ +0.2% +0.2 Ω 200 mV 200 mV 100 µA 100 µA Megger DLRO10X Specifications Measurement Mode Manual, Auto, Continuous, Inductive, Undirectional. Control Fully Automatic/Manual. Speed <3s for forward & reverse current and to display average. Display Measurement: 4 1/2 digit seven segment LED. Range & Safety Large backlit LCD. 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. Data transfer Real Time or from storage via RS232. Storage 700 tests. Memo field Up to 200 characters per test via integral alphanumeric keypad. Battery Capacity 7 Ah NiMH rechargeable. Battery Life Typical 1000 x 10A Tests Before Recharge. Recharge Via external 90 V - 260 V 50/60 Hz charger or from 12 to 15 V dc supply. Standard Charging Rate 2.5 hours to 90% capacity, 4 hrs for full charge. Temperature +5 °C to +45 °C (41 °F to 113 °F) at full specification -10 °C to +50 °C (14 °F to 122 °F) at reduced accuracy. Storage Co-Efficient -30 °C to +70 °C (-22 °F to 158 °F). Slow Charging <0.01% per °C over range 5 °C to 40 °C (<0.006% per °F from 4 1°F to 104 °F). Humidity (MAX) +10 °C to +45 °C (50 °F to 113 °F). Altitude (MAX) 90% RH @ 40 °C (104 °F) non-condensing. Safety 2000 m (6562 ft) to full safety specifications. EMC IP65 case closed, IP54 battery operation. 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. Megger DLRO10X warranty 2 year, conditional upon registering.

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