Megger DLRO-H200 User manual

User guide
DLRO-H200
DLRO-H200 Win
Micro-ohmmeter
Art No. ZP-BD04E Doc. BD0472CE V03a 2020

DLRO-H200
DLRO-H200 Win
Micro-ohmmeter
NOTICE OF COPYRIGHT & PROPRIETARY RIGHTS
© 2013-2020, Megger Sweden AB. All rights reserved.
The contents of this manual are the property of Megger Sweden AB. No part of this work may be reproduced or transmitted in any form or
by any means, except as permitted in written license agreement with Megger Sweden AB. Megger Sweden AB has made every reasonable
attempt to ensure the completeness and accuracy of this document. However, the information contained in this manual is subject to change
without notice, and does not represent a commitment on the part of Megger Sweden AB. Any attached hardware schematics and technical
descriptions, or software listings that disclose source code, are for informational purposes only. Reproduction in whole or in part to create
working hardware or software for other than Megger Sweden AB products is strictly prohibited, except as permitted by written license
agreement with Megger Sweden AB.
TRADEMARK NOTICES
Megger® and Programma® are trademarks registered in the U.S. and other countries. All other brand and product names mentioned in this
document are trademarks or registered trademarks of their respective companies.
Megger Sweden AB is certified according to ISO 9001 and 14001.
Postal address:
Megger Sweden AB
Box 724
SE-182 17 DANDERYD
SWEDEN
T [phone]
E [e-mail] www.megger.com
Visiting address:
Megger Sweden AB
Rinkebyvägen 19
SE-182 36 DANDERYD
SWEDEN
BD0472CE ZP-BD04E DLRO-H200 3

4DLRO-H200 ZP-BD04E BD0472CE
Contents
1 Safety
................................................................... 6
1.1 Safety instructions............................................... 6
1.2 Symbols on the instrument ................................. 7
2 Introduction
................................................................... 8
2.1 General............................................................... 8
Unpack system ................................................... 8
2.2 Service and support ............................................ 8
Training .............................................................. 8
Contact information ........................................... 8
2.3 Basic technical description................................... 9
Kelvin test........................................................... 9
2.4 DualGround – Both sides grounded .................... 9
3 DLRO-H200 overview
................................................................. 10
3.1 The instrument ................................................. 10
3.2 Included accessories.......................................... 12
3.3 Optional accessories.......................................... 13
4 Functions and set up
................................................................. 14
4.1 General............................................................. 14
Internal software version................................... 14
4.2 Test positions .................................................... 14
4.3 Bluetooth – .................................. 15
Setup / .......................................................... 15
4.4 Clock – ...................................................... 16
Setup / .............................16
4.5 Minimum current – Inom.................................. 17
Setup / I nom ..................................................... 17
4.6 Data logger – LOG............................................ 17
Setup / LOG ....................................................... 17
4.7 Pass/Fail – P/F.................................................... 18
Setup / P/F ......................................................... 18
4.8
PC communication – PC COM ...............................19
PC COM ........................................................... 19
4.9 Audio signals .................................................... 19
4.10 Battery power supply ...................................... 20
Charging .......................................................... 20
Battery practice................................................. 20
5 Operating instructions
................................................................. 22
5.1 General instructions.......................................... 22
Important regarding all testing.......................... 22
Power supply ................................................. 22
LCD display....................................................... 22
To choose measurement time............................22
To choose I > I nom or I = I max ........................... 22
Working at low temperatures ........................... 23
Kelvin Clamp/Probe practice..............................23
Save test results ................................................ 23
Hold present test result..................................... 23
Delete present test result .................................. 23
Recalling test results from the log ..................... 23
Delete results in the log .................................... 23
Delete all results in the log................................ 23
5.2 Measurement with max. charge, I=IMAX ......... 24
5.3 Measurement with minimum current guaran-
tee, I > I nom..................................................... 25
5.4 Measurement using P/F – pass/fail..................... 26
5.5 Measurement with user defined settings........... 27
5.6 Measurement using the LOG function............... 27
Running numbers mode ................................... 27
Circuit breaker testing mode............................. 27
5.7 Measurement using P/F and Inom..................... 29
5.8 Testing on circuit breakers having a current
transformer in the loop.................................... 30
5.9 Trouble shooting............................................... 30
Error messages.................................................. 30
6 Application examples
................................................................. 32
6.1 Safety ............................................................... 32
Important regarding all testing.......................... 32
6.2 Measurement using Kelvin probes..................... 32
6.3 Test a CB using DualGround.............................. 33
6.4 Test a CB by injecting through the ground
cables .............................................................. 33
Disconnection................................................... 33
7 DLRO-H200 Win
................................................................. 34
7.1 Introduction...................................................... 34
Download software .......................................... 34
7.2 DLRO-H200 Win installation ............................. 34

BD0472CE ZP-BD04E DLRO-H200 5
Preconditions.................................................... 34
Setup................................................................ 34
Select language ................................................ 34
7.3 Start DLRO-H200 Win....................................... 35
Exit DLRO-H200 Win......................................... 35
7.4 Connecting to DLRO-H200 ............................... 35
Automatic connecting ...................................... 35
Manual connecting........................................... 35
7.5 Read the measurement log ............................... 37
Export data to file ............................................. 38
Delete all data on the instrument...................... 38
7.6 User settings..................................................... 39
Read existing settings ....................................... 39
Program "User" positions ................................. 39
7.7 Calibration........................................................ 39
Procedure ......................................................... 39
Voltmeter calibration ........................................ 39
Ammeter calibration ......................................... 40
Calibration report ............................................. 40
8 Specifications
................................................................. 42
Index ...................................................................... 45
Contents

6DLRO-H200 ZP-BD04E BD0472CE
1 SAFETY
1Safety
1.1 Safety instructions
For your own safety and to get the maximum benefit
from your instrument, please ensure that you read
and understand the following safety instructions and
warnings before using the instrument.
Read and comply with the following
instructions.
Always comply with local safety
regulations.
Important
Warning
Connecting – before test
1. Before measuring resistance in circuit breakers
or disconnecting switches (isolators), always
check to see that the object being tested is
closed and grounded at least on one side.
2. Do not connect the instrument to inductive
loads if not necessary. This can cause high volt-
ages when removing the current clamps and
possibly damage DLRO-H200.
3. Always connect the protective ground on
DLRO-H200 before making any other connec-
tions.
4. Always connect the test cables to DLRO-H200
before connecting them to the test object.
5. Never connect DLRO-H200 to live circuits.
During test
1. The rising current waveforms produced by the
instrument may induce enough current into
the secondary of a current transformer (CT)
circuit to actuate a protective relay.
If there is a CT in the current circuit, the pro-
tective relay equipment that is connected to it
must be blocked to prevent actuation.
After completing the measurements, you can
follow the normal procedures that are used to
demagnetize current transformer cores after
DC has passed through their current trans-
former.
2. Never open a circuit breaker while DLRO-H200
is connected to it.
3. Connection points for current cables can be-
come hot during current generation.
4. High current on output terminals.
Disconnecting – after test
1. First, disconnect all test cables from the test
object and then disconnect them from DLRO-
H200.
Last, disconnect the protective ground from
DLRO-H200.
Important
1. The instrument is intended for use in industrial
environment. It generates, uses and can radi-
ate radio frequency energy and, if not installed
and used in accordance with these instructions
it may cause interference to other devices
in the vicinity. If this equipment does cause
interference with other devices, which can be
determined by turning the equipment off and
on, the user is encouraged to try to correct the
interference by one or more of the following
measures:
▪Reorient or relocate the receiving device.
▪Increase the separation between the equipments.
▪Consult the manufacturer or field service
technician for help.
2. Never leave the DLRO-H200 unattended while
it is turned on.
3. Do not use any accessories that are not in-
tended for use together with the instrument.
4. It is not possible to use the DLRO-H200 for
testing during battery charging.
5. Use a damp cloth for cleaning. Do not use
liquid cleaners or aerosol cleaners.
6. Do not attempt to service the instrument your-
self. If you attempt to service the instrument
yourself the warranty is no longer valid. Refer
all servicing to Megger authorized personnel.
7. If you need to return the instrument, please
use either the original crate or one of equiva-
lent strength.

BD0472CE ZP-BD04E DLRO-H200 7
1 SAFETY
1.2 Symbols on the
instrument
Caution, refer to accompanying docu-
ments.
Protective conductor terminal.
WEEE, Waste Electrical and Electronic
Equipment. Please utilize your lo-
cal WEEE collection facilities in the
disposal of this product and otherwise
observe all applicable requirements.
Equipment complies with current EU
directives.
Information duty regarding substances
on REACH article 33, SVHC-list
This product contains a coin cell battery which con-
tains 1,2- dimethoxyethane (CAS 110-71-4) above
0.1% by weight.

8DLRO-H200 ZP-BD04E BD0472CE
2 INTRODUCTION
2Introduction
2.1 General
The DLRO-H200 is designed to measure the resistance
of circuit breaker contacts, bus-bar joints, contact ele-
ments in bus-bars and other high-current links.
When contact resistance rises because of oxidation,
loosened or improperly tightened threaded joints,
temperatures rise abnormally at the points of contact.
This abnormal heating reduces conductivity thereby
accelerating the rise in temperature — and this often
leads to serious trouble.
The DLRO-H200 micro-ohmmeter can be used to de-
tect such problems early so that they can be remedied
long before trouble starts. Checking contact resistance
at regular intervals provides a clear indication of the
state of your system.
Unpack system
Unpack the unit and check for evidence of any ship-
ping damage. If there is any visual damage, imme-
diately notify the freight carrier to make a damage
claim, and notify Megger of the damage.
2.2 Service and support
For technical assistance please contact your local
representative or direct your request to Megger in
Sweden.
When sending the instrument, please use either the
original crate or one of equivalent strength.
Add the return authorization number to the address
label of the shipping container for proper identifica-
tion and quicker handling.
Note Ship the equipment without nonessential
items such as test leads, etc. These items are
not needed by the factory to perform service.
Training
For information about training courses contact your
local distributor or the Megger Sweden office.
Contact information
Internet: www.megger.com
E-mail: [e-mail]
Tel: [phone]

BD0472CE ZP-BD04E DLRO-H200 9
2 INTRODUCTION
2.3 Basic technical
description
The output current is delivered from a supercapacitor
which is charged from the built-in rechargeable bat-
teries.
Kelvin test
The DLRO-H200 uses Kelvin probes or clamps for the
measurement. A Kelvin test uses four wires and meas-
ures continuity resistances ensuring all contact and
lead resistances are compensated for, which allows a
much greater accuracy in measurements. Each Kelvin
probe assembly has two probe tips. When contacting
the test object it will be contacted with two plus two
probe tips. One pair is for the current generated. The
other pair will measure the very small voltage present.
Principle for the 4 wire Kelvin test.
2.4 DualGround – Both
sides grounded
With DLRO-H200 it is possible to make measurements
according to the DualGround™ method. The most im-
portant advantage is improved safety but the method
is also easier and saves time. The number of tasks is
reduced when the ground cable does not need to be
disconnected and reconnected. Permission related
work that may include paper work could many times
be avoided. However, the local safety regulations shall
always be followed.
Using the DualGround method might cause a small
measurement error cause by the current running
through the ground loop. The error value depends on
the relation between the two parallel circuits.
Example: If the test object is 50 µ and ground loop
is 10 m the error will be 0.5%
Two 10 m, 95 mm2grounding cables has a resistance
of around 3.6 m. Transitional resistance in connec-
tions and clamps to be added.
With both sides grounded the induced current will not pass
through the test instrument.

10 DLRO-H200 ZP-BD04E BD0472CE
3 DLRO-H200 OVERVIEW
3DLRO-H200 overview
3.1 The instrument
1
2
4
5
6
7
8
3
910 11
Top view
12
13 14
Bottom view

BD0472CE ZP-BD04E DLRO-H200 11
3 DLRO-H200 OVERVIEW
1. Current output terminal (-)
2. Current output terminal (+)
3. Protective conductor terminal
4. Display
▪The display offers a combination of analogue arc and a
dual digital readout:
▪Analogue arc:
Shows the capacitor charge.
▪Dual digital display:
Large main digital readout for good visibility of all main
measurement results
Second digital display for additional data.
5. Keys
Keys for navigation and to make settings in the
display .
◀ ▶
▲ ▼
Left, right is used to navigate between
characters/digits.
Up, down is used to change each
character/digit.
OK Press and hold to enable edit of pa-
rameters select and confirm param-
eters. Press shortly to confirm.
Backlight
Automatic switch off after 20 s.
CClear / Cancel
6. TEST button
When the function selector is in any of the posi-
tions Inom ,Imax or Presets measurement
is performed by pressing the button
7. Stand-by / Wake up
Press shortly to toggle
Clear log
(Press and hold for 5 s)
8. Function selector
OFF
Inom
0.1 s Test positions
Measurement time with
minimum current guaran-
tee
0.6 s
3 s
Imax
0.1 s Test positions
Measurement time with
max. charge
0.6 s
3 s
Setup
Bluetooth “pair units”
▪Set date and time
▪Set volume for the internal
buzzer
▪Discharge the DLRO-H200
internal capacitor
I nom Minimum current guaran-
tee setting
LOG Data log settings
P/F Pass/Fail settings
PC COM PC communication (dump
data to PC)
Presets
1Test positions
Stored settings (Set from
PC SW)
2
3
9. Input for sensing voltage (-)
Connector for the negative test lead.
10. Input for sensing voltage (+)
11. Connector for trigger
12. Battery lid
13. Connector for the battery charger
14. Battery charging indicator

12 DLRO-H200 ZP-BD04E BD0472CE
3 DLRO-H200 OVERVIEW
3.2 Included accessories
▪Test cables with Kelvin probes (one with trigger)
or
Test cables with Kelvin clamps
▪Transport case
▪Charger
▪Rubber holster
▪Carrying strap
▪Belt clip
▪DLRO-H200 Win
(GA-90000)
Test cables with Kelvin probes (incl. in BD-59090)
(GA-90001)
Test cables with Kelvin clamps (incl. in BD-59092)
Carrying strap (50-11011) and rubber holster (55-1307)
Belt clip (50-11010)

BD0472CE ZP-BD04E DLRO-H200 13
3 DLRO-H200 OVERVIEW
3.3 Optional accessories
Test cables with Kelvin probes (current & sense)
2 x 1.3 m (4 ft) (one with trig button), 16 mm2GA-90000
Test cables with Kelvin clamps (current & sense)
1.3 m (4 ft) red, 3 m (10 ft) black, 16 mm2GA-90001
Test cable with Kelvin probe
1.3 m (4 ft) red, 16 mm2(with trig button) GA-00370
Test cable with Kelvin probe
1.3 m (4 ft) black, 16 mm2GA-00371
Test cable with Kelvin clamp
3 m (10 ft) black, 16 mm2GA-00372
Test cable with Kelvin clamp
1.3 m (4 ft) red, 16 mm2GA-00373
Test cable with Kelvin clamp
5 m (16 ft) black, 25 mm2GA-00374
Test cable with Kelvin clamp
10 m (33ft) black, 16 mm2
This length in combination with the cable area
16 mm2results in a reduction of maximum current GA-00376
Cable kit 5 m
Current cable 0.5 m (1.6 ft), Connection plate and
sense cables 5 m (16 ft), Ground cable GA-00380
Cable kit 10 m
Current cable 0.5 m (1.6 ft), Connection plate and
sense cables 10 m (33 ft), Ground cable GA-00382
Cable kit 15 m
Current cable 0.5 m (1.6 ft), Connection plate and
sense cables 15 m (49 ft), Ground cable GA-00384
Calibration kit BD-90002
Soft carrying case
For DLRO-H200, Charger and Cables GD-00620
Cable kit 5 m, (GA-00380)
(BD-90002)
Calibration kit
Soft carrying case
(GD-00620)

14 DLRO-H200 ZP-BD04E BD0472CE
4 FUNCTIONS AND SET UP
4Functions and set up
4.1 General
Internal software version
When turning the function selector from OFF to any
position the display will shortly show a number e.g.
008 and then during five seconds the internal soft-
ware version e.g. "01C" (revision R01C).
OFF
The instrument should be in the OFF position when
not in use.
Note The DLRO-H200 will go to stand by mode af-
ter about 10 minutes of inactivity. To wake up,
press Stand-by / Wake up (CLR LOG) button.
4.2 Test positions
Inom
Minimum current is set in position Setup/I nom.
Generation / measurement time: 0.1 s, 0.6 s or 3 s.
Imax
The current is only limited by the total impedance of
the circuit.
Generation / measurement time: 0.1 s, 0.6 s or 3 s.
Presets / 1, 2, 3
User defined settings as generation time, I nom, pass/
fail and log
Note The user defined settings can only be set via
DLRO-H200 Win from a PC

BD0472CE ZP-BD04E DLRO-H200 15
4 FUNCTIONS AND SET UP
4.3 Bluetooth –
Megger do not sell Bluetooth headset.
However, bluetooth headsets can be used with DLRO-
H200. Follow instruction below.
Setup /
Display abbreviations
SEt Set
SPC Set-up PC
SHS Set-up headset
Prd Paired
E-d Enable / Disable (headset)
EnA Enabled (headset)
dIS Disabled (headset)
o Processing
ErA Erase all addresses
Enable / Disable Bluetooth
1] Use the ◀ ▶ keys to find "E-d".
2] Press OK to toggle between "EnA" (Enabled
and "diS" (Disabled).
Note Do not use the PC COM mode if there is a
requirement for non-electromagnetic interfer-
ence in the environment.
The PC COM position is always enabled as it
overrides the disable setting.
Set up Bluetooth
1] Select Setup / on the DLRO-H200.
2] Press ▶, "SPC" will be shown.
3] Press "OK. Display will show "o".
The DLRO-H200 is now visible in the Blue-
tooth network and ready to be paired.
4] Open up the Control Panel on the PC.
5] Select “Add a device” from the control panel.
The computer searches for DLRO-H200 and
after a while the DLRO-H200 device is found.
6] Select the DLRO-H200 item and press “Next”.
After this, a menu appears that asks for the
passcode.
7] Enter code 0000 and press Next.
The installation now takes place and instal-
lation gets finished. Display on DLRO-H200
shows “Prd” and setup is complete.
8] Check also the device manager and double
click on Bluetooth and check that the Megger
DLRO-H200 comes up in the list.
9] Check that the DLRO-H200 Win can commu-
nicate with the DLRO-H200.
10] Turn the function selector to the PC COM
position on the DLRO-H200 panel.
11] Start the DLRO-H200 Wi. The software shall
now read out the s/n on the DLRO-H200 and
the connected port.
Note The procedure to pair and assign com port
varies depending on the equipment.
How to pair a headset
1] Select Setup / on the DLRO-H200.
2] Use the ◀ ▶ keys to find out that Bluetooth
is enabled, "EnA".
3] Press right arrow key twice.
The display shows “SHS”
4] Set the headset in pair mode (See the instruc-
tions for the headset.)
5] Press the OK key on the DLRO-H200.
6] When the display shows “Prd” the pairing is
ready.
How to start the headset
1] See the instructions for the headset

16 DLRO-H200 ZP-BD04E BD0472CE
4 FUNCTIONS AND SET UP
4.4 Clock –
Setup /
There are three functions in this position:
A] Set date and time.
B] Set volume for the internal buzzer.
C] Discharge the DLRO-H200 internal capacitor,
(used for service only).
Display abbreviations
CLC Clock
UOL Volume
dIS Discharge (used for service only)
yy Year
non Month
dd Day
HH Hour
nIn Minute
Date and time
1] Select Setup /
2] Press and hold OK key until digits start to
blink under the "yy" letters.
3] Set year using the ▲ ▼ keys.
4] Press OK key.
5] Press the ▶key to go further and set month,
day, hour an minute in the same way as
above.
6] Press C key to return.
Volume for buzzer
1] Select Setup /
2] Press ▶key, "UOL" is shown.
3] Press and hold OK key until digit start to blink.
4] Set level (1 to 5) using the ▲ ▼ keys.
5] Press OK key.
6] Press ▶or ◀ to return.

BD0472CE ZP-BD04E DLRO-H200 17
4 FUNCTIONS AND SET UP
4.5 Minimum current –
I nom
Setup / I nom
Display abbreviations
SEL Select
Set-up
1] Select Setup / I nom. Present setting is dis-
played.
2] Press and hold OK key until digits start to
blink under the "SEL" letters.
3] Select value, 50 or 100, using the ▲ ▼ keys.
4] Press OK key to confirm.
To cancel press C key or turn the function
selector to another position.
Result after a measurement
If the chosen value is not reached during a measure-
ment it will result in a notification on the display and
by an audio signal.
Picture shows an example after a measurement. The I nom
limit "50 A" has not been achieved, indicated by the "<"
character to the left.
The current measured during the test is shown in the upper
row. The value shown toggles between the max and min
current during the test. In this case it is the minimum cur-
rent showing "> 037 A".
4.6 Data logger – LOG
The data memory can store totally 104 measurements
and this capacity is shared by the two log modes.
Setup / LOG
Display abbreviations / description
SEL Select
oFF OFF
1A1 Label for Breaker, Phase, Interrupter
1234 Running numbers
LOG modes
OFF
When the log is OFF only the latest value is stored and only
until the performance of a following measurement, which
overwrites the previous one.
Circuit breaker testing mode,1A1
This mode is primarily designed for measurement on circuit
breakers. The three characters (1A1) are supposed to indi-
cate: Breaker, Phase, Interrupter.
Measurement is automatically stored, provided that
there are less than three measurements stored on the
selected object label. Each label can store three meas-
urements. See also section 5.6 Measurement using
the log function.
Running numbers mode, 1234
The measurements are numbered in numerical order (1 to
1999)
Measurement is automatically stored, provided that
the memory is not full.

18 DLRO-H200 ZP-BD04E BD0472CE
4 FUNCTIONS AND SET UP
Set-up
1] Select Setup / LOG. Present setting is dis-
played.
2] Press and hold OK key until characters start
to blink under the "SEL" letters.
3] Use the ▲ ▼ keys to select mode.
4] Press OK key.
4.7 Pass/Fail – P/F
In the P/F position you can enable and set the limit for
the Pass/Fail function. If the measured value exceeds
the set limit it will result in a notification on the dis-
play and by an audio signal
Setup / P/F
Display abbreviations
SEL Select
oFF OFF
Set-up
1] Select Setup / P/F. Present setting is displayed.
2] Press and hold OK key until character, "<" or
"oFF" start to blink.
3] Select "oFF" or a value using the ▲ ▼ keys.
4] Use the keys ▶◀to select the digit to
change, it will blink.
5] Use the keys ▲ ▼ keys to set the desired
value.
6] Press OK key.
To cancel press C key or turn the function
selector to another position.

BD0472CE ZP-BD04E DLRO-H200 19
4 FUNCTIONS AND SET UP
4.8 PC communication – PC
COM
The PC COM position is used for all operations per-
formed from a PC using DLRO-H200 Win. You can:
▪Dump measurement data from the DLRO-H200
▪Delete all measurements in the data log
▪Program "User" positions
▪Set DLRO-H200 clock
▪Calibrate
PC COM
Display abbreviations
rEn Remote
Set-up
The following is needed:
▪A PC with DLRO-H200 Win installed
See chapter 8 DLRO-H200 Win
▪A PC connected via Bluetooth
See section "Bluetooth set up"
4.9 Audio signals
The DLRO-H200 emits different sounds to give an au-
dible information / confirmation of an event / action.
The sound is emitted from a built-in buzzer and from
the Bluetooth headset (optional). The audio signals
vary in frequency, Low / High, and composition.
Audio signals Description
◼ ◼ ◼ . . .
The DLRO-H200 is charging
the capacitor and is not ready
for measurement.
◼ ◼ ◼ ◼ . . .
Battery low
During capacitor charge
◼◼
Measurement in progress
◼ ◼
Pass signal
Measurement complete / Pass
Wake up
◼◼ ◼
Fail signal
Measurement complete / Fail
Label full
Stand-by
◼
When pressing Test / Trigger
while lock symbol is shown
◼ ◼◼
Delete confirmed
When press and hold the
Test / Trigger
Note: Only in LOG mode
◼ ◼
Hold
When pressing Test/ Trigger
Note: Only in LOG mode
◼ ◼
Release
When pressing Test/ Trigger
Note: Only in LOG mode
Legend ◼Short - High tone
◼◼ Long - High tone
◼Short - Low tone
◼◼ Long - Low tone
. . . Continuous

20 DLRO-H200 ZP-BD04E BD0472CE
4 FUNCTIONS AND SET UP
4.10 Battery power supply
Charging
Before using the DLRO-H200 the batteries should be
charged. Use the supplied charger and connect it to
the socket at the bottom of the DLRO-H200. Typical
recharge time for fully discharged batteries is 3 hours,
at 25°C (77°F).
Tip Place the DLRO-H200 upside down to get
better the cooling of the batteries.
Important
DLRO-H200 cannot be used for testing
during charging.
LED
indicator
Description Clarification /
Remedy
Green Fully charged
Yellow
Green
Charging
Red
Yellow
Green
Temperature limits
exceeded during
the charging.
Charging will restart
when temperature
has decreased.
Red
Green
Temperature limits
exceeded, too
high or too low,
before charging.
Charging will start
when temperature is
within the limits.
Red Fault state. Wrong
battery type,
faulty battery.
Disconnect the
charger and check
the batteries.
None Battery fault /
missing or other
fault
Check batteries and
charger / cables
Replacing the batteries
1] Loosen the two screws that holds the battery
plate at the back of DLRO-H200, see figure
below.
It is recommended to use the same type of batteries
(AA (HR6) 2700 mAh NiMH) as the original ones.
Note It is possible to use standard (non-rechargeable)
alkaline cells but then only for test using the 0.1 s
measurement position and I > I nom.
Loosen the two screws that holds the battery lid at the back
of DLRO-H200.
Important
Always replace all batteries at the same
time.
Do not mix old and new batteries.
Do not mix types or brands.
Battery practice
▪To extend the battery life cycle time it is a good practice
to recondition the batteries in a separate charger that has
recondition options like refresh / discharge. It is a good
idea to condition the batteries once in about 6 months or
after around 12 regular charge cycles to get the most out
of them.
▪To prevent the batteries from becoming fully discharged,
if DLRO-H200 is not used regularly, a good rule of thumb
is to charge the batteries every month.