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Item category Digital Low Resistance Ohmeters ( DLRO )
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 Description Click here to view full-pdf specification sheets The MEGGER DUCTER DLRO 10 Digital Low Resistance Ohmmeter brings a new standard to the measurement of low values of resistance.The DLRO 10 is built into a strong,lightweight case which is equally durable while work- ing on the bench,in the field,or in the laboratory.The DLRO 10 is light enough to be worn around the neck and small enough to be taken into ar-eas which were previously too small to accommodate low resistance meters.Its bright 4-1/2 digit LED dis- play will ensure complete readability even in the darkest corners. The DLRO 10 automatically selects the highest current,up to 10 A dc,to mea- sure resistance from 0.1 µ . to 2000 ., on one of seven ranges.Measurements are taken with forward and reverse currents to cancel the effects of any standing voltages across the test sample and the average value is dis- played within three seconds,to a ba- sic accuracy of 0.2%. The DLRO 10 automatically selects the highest current, up to 10 A dc, to measure resistance from 0.1 mW to 2000 W, on one of seven ranges. Measurements are taken with forward and reverse currents to cancel the effects of any standing voltages across the test sample and the average value is displayed within three seconds, to a basic accuracy of 0.2%. When making a measurement, the instrument checks to see if good continuity is present in the C and P circuits. If continuity is correct, the test current autoranges to the highest possible current and is applied in the forward direction and then in the reverse direction. At the end of approximately two seconds, the average of the two directions is display. Normally, the power used is limited to 250 mW to avoid heating the sample under test. The DLRO 10 also checks to see if there is noise present when making measurements. If noise is present, the instrument will warn the user and perhaps limit the resolution of the reading to a level which can be trusted. Ambiguous digits will flash to show their unreliability. Applications The needs for accurate low resistance measurement are well known and very diverse.They range through receiv-ing,inspection of components to ground bonding and welded joints. Typical end users include utilities, telecom,railroads,aviation,manufac- turing facilities,and process control plants.Applications include,but are not limited to,making dc resistance •Switch and contact breaker resistance •Busbar and cable joints •Aircraft frame bonds and static control circuits •Integrity of welded joints •Intercell strap connections on battery systems up to 600 V peak •Quality control of resistive components •Small 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 • Accurate results in under 3 seconds • Designed for the rigors of on-site testing and laboratory use • Four-wire measurement technique cancels out lead resistance • Auto current reversal cancels standing emfs • Continuous not pulsed current • 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 • 5 operating modes including fully automatic Specifications Test Current Accuracy: ±10% Output Current Stability Better than 10 ppm per second on at test currents of 10 mA or less Better than 100 ppm per second at currents above 10 mA Voltmeter Input Impedance: greater than 200 k . Hum rejection: less than 1%+20 digits additional error with 100 mV rms 50/60 Hz on potential leads.If this level is exceeded,a warning will illuminate on the front panel. Measurement speed: less than 3s for forward,reverse measurement and to display average Display Measurement:4-1/2 digit seven segment LED Range and Safety:LED indication Battery Standard capacity:7 Ah NiMH re- chargeable battery supplied with instrument Recharge:via external charger sup-plied from 115/230 V 50/60 Hz or from 12 V car battery Life:typically 1000 x 10 A tests Battery charging Standard Charge:14 hrs Fast Charge:4 hrs to 90 %capacity at 68 o F (20 o C) Charging temperature Standard charge:32 o F to 113 o F (0 o C to +45 o C) Fast charge:50 o to 113 o F (+10 o to +45 o C) Temperature Range Operation 41 o to 113 o F (+5 o to +45 o C)at full specification 14 o to 122 o F (-10 o to +50 o C)at re- duced accuracy Calibration temperature 68 o F (20 o C) Temperature Coefficient <0.006%per o F over range 41 o to 104 o F <0.01%per o C over range 5 o to 40 o C Storage -4 o to 158 o F (-20 o to +70 o C) Humidity (max): 90%RH @104 o F (40 o C)non-condensing Altitude (max): 6562 ft (2000 m)to full safety specifications Safety in accordance with EN61010-1 600 V Category III EMC meets EN50081-1 and EN50082-1 (1992) Dimensions: 8.6 x 4 x 9.5 in. (220 x 100 x 237 mm) Weight: 5.6 lb (2.5 kg)including bat- tery module Please see pdf. for more detailed specifications Ordering Details MEGGER ® DUCTER ® DLRO ® 10 .................................... DLRO-10 Included Accessories: 7 Ah NiMH battery module ..................................... EV6340-101 DH4 Duplex handspikes, 4 ft (1.2 m) [2], one with indicator lights ......................................... EV6111-503 Battery charger for operation from 115/230 V 50/60 Hz supply ......................... EV6280-333 Cigar lighter adapter for battery charging .............. EV6280-332 User guide ........................................................... EV6172-473 Warranty book ..................................................... EV6170-618 Optional Accessories  Test leads .................................................................... see chart Carrying case for DLRO 10 and all standard accessories ........................................ EV6380-138 Carrying case for optional lead sets. ............................. 18313 Calibration Shunt, 10 ., current rating 1 mA. .................. 249000 Calibration Shunt, 1 ., current rating 10 mA. .................. 249001 Calibration Shunt, 100 m, current rating 1A. .................. 249002 Calibration Shunt, 10 m, current rating 10 A. ................. 249003 Certificate of Calibration for Shunts, NIST ..................... CERT-NIST Replacement tips for DH4, DH5 and DH6 handspikes Needle point................................................................. EV25940-012 Serrated end ................................................................ EV25940-014 Click here to purchase accessories Click here to purchase test leads Please call 1800 783 6664 for any items not listed Model MEGGER ® DUCTER ® DLRO ® 10 ..DLRO-10 Please order from the menu below © 2006 Omni Controls, Inc.. All Rights Reserved. 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