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Digital Ground Resistance Tester

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					                                                                                                       GROUND RESISTANCE TESTERS


                                                                                                                 
                                                                                                MEGGER
                                                                                                DET2/2
                                                                                                • Accurately measures
                                                                                                  ground resistance
                                                                                                  under the most
                                                                                                  demanding conditions

                                                                                                • Autoranging

                                                                                                • High accuracy,
                                                                                                  high resolution




Digital Ground Resistance Tester
DESCRIPTION                                    A simple series of menus guides the user      Applications include:
The Megger DET2/2 Digital Ground Resis-       in making the selections. Settings also       • Generator, substation and switch-
tance Tester provides a wide resistance        may be stored in memory for use in sub-       yard grounds
range from 0.010 ohm to 19.99 kilohms for      sequent tests. Power is supplied by
testing large, low-impedance grounding         rechargeable batteries that give five         • Computer and communication sys-
systems and small, simple grounding sys-       hours of life per charge, the equivalent      tem grounds
tems with ±0.5% accuracy and 0.001-ohm         of 600 thirty-second tests. The batteries     • EMI/RFI systems
resolution. Microprocessor control and         recharge in less than six hours using the
                                               internal charger.                             • Antenna, central office and pedestal
advanced filtering simplify testing in envi-                                                 grounds
ronments with high levels of interference.
                                               APPLICATIONS                                  • CATV system grounds
The DET2/2 tester is suitable for making
routine maintenance checks using the           The DET2/2 tester is a reliable instru-
                                               ment designed for larger or more              FEATURES AND BENEFITS
fall-of-potentialmeasurement technique
as well as the slope or four-potential         complex grounding systems, including          • Wide resistance range — 0.010 ohm
method. It may also be used to measure         communication grounding systems, and          to 19.99 kilohms
soil resistivity to map for ground-bed         for difficult testing environments. It is     • Highly accurate — ±0.5%
site selection.                                suitable       for    soil   resistivity
                                               measurements, which are used to estab-        • High resolution — 0.001 ohm — with
Resistance readings, test status informa-      lish the optimum electrode design and         autoranging
tion and warnings are displayed in clear,      site, and for performing archaeological       • Microprocessor control for im-
user-friendly terms on a large LCD read-       and geological investigations.                proved error detection
out. The instrument monitors and
indicates excessive input noise and high-      Resistivity tests assist in the design of a   • Clear, unambiguous warnings and
current probe resistance, automatically        correct ground system and avoid the           error messages
warning if probe resistance is too high.       cost of reworking electrode installa-
                                               tions. The direct indication of excessive     • Continuously adjustable operating
Range changing is also automatic; the in-      noise and high-spike resistances avoids       frequency
strument chooses the range that provides       measurement errors or lengthy sepa-           • Rechargeable batteries with built-in
the best resolution. Test frequency, test      rate testing of these parameters. The         charger
current level and filtering may be adjusted    direct, digital readings are unambigu-
to overcome adverse conditions influenc-       ous, avoid errors and assist in faster,
ing the test.                                  more economic testing.
GROUND RESISTANCE TESTERS

SPECIFICATIONS                                              Temperature Range
Ground Resistance Range                                     Operating: 14 to 104° F (–10 to +40° C)
0.010 Ω to 19.99 kΩ                                         Storage: –4 to +140 ° F (–20 to +60 ° C)
(autoranging), 0.001 Ω resolution
                                                            Power Source
Accuracy                                                    Internal, rechargeable, sealed lead-
±0.5% of reading ±2 digits at 73° F (23° C)                 acid battery (12 V, 2.6 Ah)
                                                            External 12-volt source (e.g., car battery)
Test Frequency
100 to 160 Hz                                               Power Requirements
                                                            120/240 Vac, 50/60 Hz
Test Current
50 mA max. (selectable high and low                         Charging Time: 6 h
levels)                                                     Battery Life: 5 h

Interference                                                Dimensions                                                 Model DET2/2 is built into a durable
40 V peak-to-peak                                           9.6 H x 13.5 W x 6.25 D in.                                plastic case with hinged top and easy-to-
                                                            245 H x 344 W x D 158 mm                                   grip carrying handle.
Maximum Output Voltage
50 V                                                        Weight
                                                            11 lb (5 kg)




                                                               ORDERING INFORMATION
   Item (Qty)                                                            Cat. No.       Item (Qty)                                                              Cat. No.
   DET2/2 Digital Ground Resistance Tester ............. 250202                         Deluxe accessory kit ................................................. 250581
                                                                                          Includes three color-coded test leads,
   Included Accessories                                                                       25, 50 and 100 ft [8, 15 and 30 m] (1 set);
   Universal test record cards ..................................... 250942                   ground rods, 20 in. [508 mm] (1 pr); and
   Charging cord .............................................................. 17032         padded case to hold instrument, leads and rods
   Charging cord ........................................................... 17032-1    Test leads, color-coded,
   “Getting Down to Earth” manual .................... AVTM25-TA                          25, 50 and 100 ft [8, 15 and 30 m] (1 set) ........... 250576
   Instruction manual ........................................ AVTM25-202J              Ground rods
                                                                                          11 in. [250 mm] (1 pr) .......................................... 250584
   Optional Accessories                                                                   20 in. [508 mm] (1 pr) .......................................... 250580
   Standard accessory kit ............................................. 250579            30 in. [760 mm] (1 pr) .......................................... 250582
     Includes three color-coded test leads,                                             Soil resistivity kit ...................................................... 250586
        25, 50 and 100 ft [8, 15 and 30 m] (1 set);                                       Ground rods, 20 in. [508 mm] (2 pr) .................. 250580
        ground rods, 20 in. [508 mm] (1 pr); and                                          Test leads, 50 ft [15 m] (4) .................................. 210965
        canvas case for leads and rods only                                               Case (1) .................................................................. 250855

				
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