Atec DET20C User Manual

arth/Ground Resistance & Leakage Current Clamp Testers
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DET10C, DET20C
Earth/Ground Resistance & Leakage Current Clamp Testers
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Easy, fast clamp-on operation – No rods or cables necessary
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Measures ground resistance from 0.025 to 1550
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Measures ground leakage current from
0.2mA to 35A
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Auto ranging with high and low alarms
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Automatic self calibration
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Extensive data storage and USB data download for later analysis (DET20C)
DET10C DET20C
DESCRIPTION
The Megger models DET10C and 20C measure earth/ground resistance and current flow using clamp-on technology. The instruments induce a test current into the system without the need to disturb existing connections. Either unit is a useful addition to the more traditional methods of earth/ground resistance testing that may require disconnection and the use of stakes or ground rods. Simply clamp around the conductor or stake/rod and measure the resistance to ground fast and accurately.
The DET10C and 20C can also be used to measur earth/ground resistance in multiple loop installations without disconnecting the earth or ground. This allows the user to perform the test quickly and easily in total safety, with the added convenience of having a single point of measurement to read the earth/ground resistance.
Each instrument also provides a true RMS current measurement reading to better indicate potential measurement problems and provide a useful overview of the dynamics of the general earth/gr
ound system.
e
The units are rugged, compact and have configurable audible alarms. They also feature auto shutdown (which is also configurable), data storage and self calibration on power-up, and are supplied with a calibration loop – all contained in a rugged carry case. The DET20C also comes with a USB interface cable and is compatible with Megger Download Manager Software (included) allowing further analysis and storage of data.
APPLICATION
The DET10C and 20C have a variety of applications including:
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Use to measur loops ar
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Use on multi-grounded systems without disconnecting the gr
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Use to measure leakage current flowing to ground or circulating in gr
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Use on cell towers, RF transmitters and telecommunications sites.
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Use to inspect and verify lightning protection systems.
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Use on a variety of consumer installations, including pools, spas, etc.
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Measure shield leakage current to ground for shield continuity checks
ound pads and buildings.
ound rod/stake under test.
esistance and continuity of gr
e r
ound systems.
ounding
EATURES AND BENEFITS
F
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Easy and fast clamp-on operation. No need for cables or auxiliary rods/stakes.
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Large LCD display screen that can be read in bright
unlight.
s
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easures ground resistance from 0.025to 1550.
M
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Direct reading of continuity and ground loop resistance.
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Measures ground leakage or phase current from
0.2mA to 35A.
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arge jaw opening to accommodate a variety of
L
onductors.
c
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Indication of high noise content that may affect readings.
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Lightweight...only 750g (1.65lbs), yet exceptionally rugged for regular field use.
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Hold function for difficult to reach installations.
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Auto-off to save on battery power.
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Configure high and low alarms with audible indication for fast field checks.
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On board storage of test results (up to 8180 records).
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Calibration check loop to insure proper operation.
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Rugged, yet lightweight storage case contains complete testing kit.
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USB interface for download of test data for later analysis (DET20C).
DET10C DET20C
arth/Ground Resistance & Leakage Current Clamp Testers
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LECTRICAL SPECIFICATIONS
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Ground Resistance Resolution Accuracy
Range
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0.025 - 0.25 0.002 ± 1.5% ± 0.05
0.25 - 9.999 0.02 ± 1.5% ± 0.1 10 - 99.99 0.04 ± 2.0% ± 0.3
100 - 199.9 0.4 ± 3.0% ± 1.0
200 - 400 2 ± 5.0% ± 5 400 - 600 5 ± 10% ± 10
600 - 1550 20 ± 20%
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Loop resistance non-inductive, external field <50 A/m, external electrical field <1 V/m, conductor centred in jaws.
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Resistance measurement frequency 1.667KHz
Alarm Type Range Resolution
High Alarm 0 - 1550 1
Low Alarm 0 - 1550 1
Leakage Current Resolution Accuracy
3
Range
0.200 – 1.000 mA 0.001 mA ± 2.0% ± 0.05 mA
1.00 – 10.00 mA 0.01 mA ± 2.0% ± 0.03 mA
10.0 – 100.0 mA 0.1 mA ± 2.0% ± 0.3 mA 100 – 1000 mA 1 mA ± 2.0% ± 3 mA
0.20 – 35 A 0.01 A ± 2.0% ± 0.03 A
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Auto range, 50/60Hz, true RMS to crest factor <3.5
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The DET20C instrument is shown being used to test a pole ground.
GENERAL SPECIFICATION
Conductor size ..................................35mm Ø approx
Battery type ......................................9V IEC 6 LR61 alkaline
Display type ......................................4 digits 9999 counts LCD
Range selection ................................Automatic within function
Overload indication..........................OL
Power consumption..........................40 mA
Battery life ........................................3000 measurements approx
Auto power down ............................5 minutes approx
Sampling time ..................................0.5 seconds
Operating temperature ....................0 to 50º C
Storage temperature..........................-20º C to 60º C
Operating humidity ..........................Less than 85% RH
Storage humidity ..............................Less than 75% RH
Dimensions........................................276 L X 100 W X 47 H (mm)
................................................
eight
W
Data logging capacity DET10C ........116 records
Data logging capacity DET20C ........8180 records
750g (1.65lbs)
DET20C OPERATION
Jaw Assembly
Extra large opening – 35 mm (1.36 in) to encircle electrode or ground rod. No air is allowed between the two jaw halves.
Jaw Trigger Lever
DET10C DET20C
arth/Ground Resistance & Leakage Current Clamp Testers
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HOLD Button
Maintains last measurement on the LCD display
Selector Switch
Quickly and easily select
• Leakage current (amps) Leakage current (milliamps)
• High/Low Alarm
• Ground resistance (ohms)
FUNC Button
Used to select the following functions:
HI: high alarm level in ohms LO: low alarm level in ohms SEC: sampling interval (in seconds) dI: download stored data to a PC NO: allows scrolling through stored
readings
DET20C DISPLAY EXAMPLE
Function
1.
Digits
2.
3. Ohm Indicates resistance mode and alarm functions. mA
4.
5. >>> Indicates instrument is set at the alarm position.
6. NOISE: Indicates ground resistance tester senses noise or
Jaw Open
7.
Low Battery
8. NO.
9.
10.
REC
11. H Indicates “HOLD” function activated.
12. AP Indicates Auto Power Off activated. Deactivate
Display curr record number. Display value fr
Indicates gr or A.
excessive current present in the ground electrode. Displayed if the jaws ar measurement, this symbol and word OPEN will be shown in LCD. Indicates battery voltage is lower than r Indicates the data r Indicates data logging is in pr
by holding down the REC button then turning on unit.
ent selected function or current
om 0 to 9999 with decimal point.
ound leakage curr
ecord number in memory.
ent mode in mA
e opened during the
equir
ogress.
ed.
11
LCD Panel
REC Button
Used to increment value or start data download when the FUNC button is in use. Also used to start data logging or record a reading.
91076
5
1
8
12
2
4
3
DET20C Data Functions
• Store a specific r
• Data logging
• Adjustable sampling interval
• Data logging capacity up to 8180 records (DET20C)
• Review of stored data
• Download data to a PC for later analysis
eading
DET10C DET20C
Earth/Ground Resistance & Leakage Current Clamp Testers
The DET20C instrument is shown being used to test a facility gro
ORDERING INFORMA
Item (Qty) Cat. No.
Digital Earth T Digital Earth T
Included Accessories (DET10C and DET20C)
Carry case Calibration loop Battery (fitted)
Included Accessories (DET20C)
USB interface unit Download Manager Software
est Clampmeter DET10C est Clampmeter
und.
DET10C and 20C comes with a rugged carry case, calibration fixture, carry case shoulder strap and USB interface cable (DET20C only).
TION
DET20C
UK
Archcliffe Road, Dover CT17 9EN England T (0) 1 304 502101 F (0) 1 304 207342
UNITED STATES
4271 Bronze Way Dallas, TX 75237-1019 USA T 1 800 723 2861 T 1 214 333 3201 F 1 214 331 7399
OTHER TECHNICAL SALES OFFICES
Norristown USA, T Mumbai INDIA, Le Raincy FRANCE, Cherrybrook AUSTRALIA, Guadalajara SPAIN and The Kingdom of BAHRAIN.
oronto CANADA,
ISO STATEMENT
Registered to ISO 9001:1994 Reg no. Q 09250
Registered to ISO 14001 Reg no. EMS 61597
DET20C_10C_DS_
.megger
www Megger is a registered trademark
.com
en_V07
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