DLRO-H200
Micro-ohmmeter
DLRO-H200
Micro-ohmmeter
Bluetooth headset for audible pass/fail
testing against adjustable limits
Up to 240 amps
Battery supplied
Lightweight – 1 kg
Safe test – DualGround™
Auto range: 1 µΩ to 1000 mΩ
Bluetooth® PC communication
Complies with IEEE and IEC standards
PowerDB Lite included for data management
and collection
DESCRIPTION
The DLRO-H200 is designed to measure the resistance of
circuit breaker contacts, bus-bar joints and other high-current
links. This product is designed with safety, ease of use and
versatility in mind.
This Micro-ohmmeter can be used anywhere to measure a
low resistance value with high accuracy.
With DLRO-H200, it is possible to make measurements
according to the DualGround
test object will be grounded on both sides throughout the test
giving a safer, faster and easier workflow.
Rugged and lightweight, the handheld DLRO-H200 is very
suitable for field work, in substations and similar locations.
The unit comes with a strong rubber holster that makes it
extra durable. The DLRO-H200 is designed to carry out a full
day of testing without recharge. It can store 190 test values
and transfer test data to a PC via Bluetooth.
The Bluetooth feature can also be used in conjunction with
the wireless headset (supplied) to provide an audible pass/
fail signal against user adjustable limits as tests are performed.
DLRO-H200 micro-ohmmeters are supplied with a copy of
the PowerDB Lite software package. This intuitive software
offers powerful features for storing, analyzing and archiving
test results, and it supports reporting a wide range of industry
standard formats. It also makes it easy to integrate results
from the DLRO-H200 with results from other instruments to
produce uniform reports.
TM
method. This means that the
APPLICATIONS
The DLRO-H200 test system is designed to serve a number
of applications. The most common are contact resistance
measurements of low-, medium- and high-voltage breakers
and also at bus-bar joints and other high current links.
If the contact resistance is too high this will lead to power
loss and temperature rise, which often leads to serious
trouble. To avoid such problems, it is necessary to check the
resistance at regular intervals.
The following table demonstrates how important low
resistance is at high currents:
Current Contact resistance Power loss
10 kA 1 mΩ 100 kW
10 kA 0.1 m Ω 10 kW
1 kA 1 mΩ 1 kW
1 kA 0.1 m Ω 100 W
At 10 kA, a contact with the resistance 0.1 mΩ gives a
power loss of 10 kW. This power loss in one single point
will definitely confer a temperature rise, which may result in
overheating and possibly premature failure.
DLRO-H200
Micro-ohmmeter
FEATURES AND BENEFITS
1. Current output terminal (-)
2. Current output terminal (+)
3. Display
The display offers a combination of analog arc and a
dual digital readout:
Analog arc:
Indicates level of the capacitor charge
Dual digital display:
Large main digital readout for good visibility of all
main measurement results
Second digital display for additional data
4. Ground (earth) terminal
5. Keys for navigation and to make settings in the
display
6. TEST button
7. “Wake up,” Clear log
9
10
8. Function selector
OFF
I nom
I nom
0.1 s
0.6 s
3 s
Measurement time with
minimum current guarantee
0.1 s
I max
0.6 s
Measurement time with max. charge
3 s
Bluetooth “pair units”
Setup
PC COM
CLK
I min
LOG
P/F
Set Date/Time
Minimum current guarantee setting
Data log setings
Pass/Fail settings
PC communication
(dump data to PC)
1
Presets
2
Stored settings (Set from PC SW)
3
9. Connector for the voltage (–) sense lead
10. Connector for the voltage sense (+) lead and the trig
function
11. Connector for the battery charger
12. Battery charger indicator
1 2
4
5
7
11
12
3
6
8
DLRO-H200
Micro-ohmmeter
Application examples
Circuit breaker testing
Test of circuit breaker contacts
Test of the connections to the breaker
Testing of bus-bar
Test of bus-bar joints
Test of connections
Everywhere you need to test a low resistance/
high current connection
Switches
Disconnecting devices
Safety ground connections
Welding points
Fuses
Cables
Both Sides Grounded
Many utilities require safety grounds to remain in place
during station outages; therefore, the DLRO-H200 was
designed with this field safety constraint in mind.
Minimum time shall be spent in the substation and focus shall
be on the test rather than the equipment.
Equipment and methods that supports
DualGround™ testing are associated with
the DualGround symbol. This symbol
certifies the use of groundbreaking
technology and methods that enable a
safe, fast and easy workflow with both
sides grounded throughout the test.
Hold probes/attach Kelvin clamps to CB and press trig/TEST button. A signal indicates
pass or fail and the result is logged in the unit for download to a PC.
Traditional measurement from ground. Injection is done through existing grounding
cable (earthing). Optional cable kit is needed. Available kits have 5, 10 or 15 m cables.
DLRO-H200
Micro-ohmmeter
SPECIFICATIONS
Specifications are valid at fully charged batteries and an ambient
temperature of +25° C, (77° F). Specifications are subject to change
without notice.
Environment
Application field For use in high-voltage substations
Installation category CAT I
Temperat ure
Operation -20ºC to +50°C (-4°F to +122°F) *
Storage -40ºC to +70ºC (-40°F to +158°F)
Relative humidity %RH 5% -95%, non condensing
Pollution degree 2
Shock IEC 60068-2-27
Vibration IEC 60068-2-6
Transport ISTA 2 A
Flammability class V0
*) Battery operation temperature 0ºC to +50° (32°F to +122°F)
Battery charging temperature +10ºC to +40° (50°F to +104°F)
CE-marking
EMC 2004/108/EC
LVD 2006/95/EC
General
Battery power Five AA (HR6) 2700 mAh NiMH cells
Recharge time < 12 h
Typical recharge time
at 25° C
Battery charger
Power supply voltage 100 - 250 V AC, 50 / 60 Hz
Power consumption 60 W
Protection Against wrong battery type, low/high
Real-time clock battery
life
Audible feedback Different buzzer sounds
User presets 3
Field calibration Yes
Encapsulation IP54
Dimensions (excl.
binding posts)
Weight 1.0 kg (2.2 lbs) instrument only
and industrial environments
)
4 h
temperature
≥10 years
217 H x 92 B x 72 D mm
8.5 H x 3.6 B x 2.8 D in.
5.0 kg (11 lbs) with accessories and
carrying case
Measurement section
Minimum current
guarantee
Pass/Fai l Settable from 1 µΩ to 1999 mΩ
Number of
measurements on fully
charged batteries
Interference
suppression
Range 0 - 1000 mΩ
Range selection Auto
Resolution
0 – 999 µΩ 1 µΩ
1.0 – 9.99 mΩ 0.01 mΩ
10.0 – 99.9 mΩ 0.1 m Ω
100 – 1000 mΩ 1 mΩ
Inaccuracy
0 – 1999 µΩ ±1 % of reading ±1 digit
2 – 1000 mΩ ±2 % of reading ±1 digit
Selectable 50 A/100 A
Valid at resistance ≤2mΩ
typ. 2200 at I min = 50 A
typ. 800 at I min = 100 A
Yes
Outputs + / –
Range > 100 A DC (R < 2 mΩ)
Output voltage (max) 2.5 V DC
Generation duration Selectable : 0.1 s, 0.6 s, 3 s
Recovery time at I min set to
100 A and load 100 µΩ
Generation time Max Typ
0.1 s 10 s 8 s
0.6 s 20 s 16 s
3 s 130 s 100 s
Inputs
SENSE + / –
Connector 4 mm banana jack
Volta ge ±3 V DC
Trigger input Threshold 8 V DC
DC IN 12 – 24 V DC, 2 A max
Logger
Logger, data Label. Timestamp, I max, I min, I Lim-
Labeling schemes Circuit breaker oriented or diar y
Capacit y 190 measurements
it, Resistance, Meas.time, P/F limit
number
Wireless communication
Headset Bluetooth
PC communication Bluetooth
DLRO-H200
Micro-ohmmeter
Included accessories
Kelvin probes with cables
Kelvin clamps with cables
Optional accessories
Bluetooth headset Bluetooth dongle
ORDERING INFORMATION
Item (Qty) Cat. No.
Included Accessories
DLRO-H200
2 x 1.3 m (4 ft) test cables with Kelvin probes
(one with trig button)
Transport case, charger, rubber holster,
carrying strap, belt clip, DLRO-H200 Win,
Bluetooth headset with dongle, and
PowerDB Lite software
DLRO-H200
1.3 m (4 ft) test cable red with Kelvin clamp
3 m (10 ft) test cable black with Kelvin clamp
Transport case, charger, rubber holster, carrying
strap, belt clip, DLRO -H200 Win, Bluetooth
headset and PowerDB Lite software
DLRO-H200
1.3 m (4 ft) test cable red with Kelvin clamp
5 m (16 ft) test cable black with Kelvin clamp
Transport case, charger, rubber holster, carrying
strap, belt clip, DLRO -H200 Win, Bluetooth
headset and PowerDB Lite software
(for North America only)
Optional Accessories
Test cables with Kelvin probes
2 x 1.3 (4 ft) m (one with trig button)
Test cables with Kelvin clamps
1.3 m (4 ft) red, 3 m (10 ft) black
Cable kit 5 m
Current cable 0.5 m (1.6 ft), connection plate
and sense cables 5 m (16 ft), ground cable
Cable kit 10 m
Current cable 0.5 m (1.6 ft), connection plate
and sense cables 10 m (33 ft), ground cable
Cable kit 15 m
Current cable 0.5 m (1.6 ft), connection plate
and sense cables 15 m (49 ft), ground cable
Test cable with Kelvin clamp
5 m (16ft) black only
Calibration kit BD-90002
Soft carrying case
For DLRO-H200, charger and cables GD- 00620
Connection plate, used
together with the cable kits
BD -59190- US
BD -59192- US
BD -59193-U S
GA-90000
GA-90001
GA-00380
GA-00382
GA-00384
GA - 00374
DLRO-H200
Micro-ohmmeter
UK
Archcliffe Road Dover
CT17 9EN England
T +44 (0) 1304 502101
F +44 (0) 1304 207342
US
4271 Bronze Way
Dallas TX 75237-1088 USA
T 800 723 2861 (USA only)
T +1 214 333 3201
F +1 214 331 7399
OTHER TECHNICAL SALES OFFICES
Norristown USA, Taby Sweden
Sydney AUSTRALIA, Toronto
CANADA, Trappes FRANCE, Kingdom
of BAHRAIN, Mumbai INDIA,
Johannesburg SOUTH AFRICA and
Conjure THAILAND.
Registered to ISO 9001 and 14001
Subject to change without notice.
DLRO-H200_DS_NAFTA_en_V03
www.megger.com
Megger is a registered trademark
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