Topcon RL-HV Series User manual

INSTRUCTION MANUAL
ROTATING LASER
RL-HV series
111111
1051731-01-A

i
HOW TO READ THIS MANUAL
Thank you for selecting the RL-HV series.
• Please read this instruction manual carefully, before using this product.
• The specifications and general appearance of the instrument are subject to change without prior notice and
without obligation by TOPCON CORPORATION and may differ from those appearing in this manual.
• The content of this manual is subject to change without notice.
• Some of the diagrams shown in this manual may be simplified for easier understanding.
• Always keep this manual in a convenient location and read it when necessary.
• This manual is protected by copyright and all rights are reserved by TOPCON CORPORATION.
• Except as permitted by Copyright law, this manual may not be copied, and no part of this manual may be
reproduced in any form or by any means.
• This manual may not be modified, adapted or otherwise used for the production of derivative works.
Symbols
The following conventions are used in this manual.
: Indicates precautions and important items which should be read before operations.
: Indicates the chapter title to refer to for additional information.
: Indicates supplementary explanation.
[Menu mode] etc. : Indicates operation keys and selection items on the screen.
Notes regarding manual style
• Except where stated, "RL-HV" means RL-HV series (RL-HV 1S / RL-HV 2S) in this manual.
• Except where stated, screens and illustrations appearing in this manual are of RL-HV 2S.
• "Laser Manager" is the name of software used to remotely control and support laser products. It works on
devices such as iPhone and AndroidTM.
• App Store is a trademark or a service mark of Apple Inc., registered in the U.S. and other countries.
• iPhone is a trademark of Apple Inc., registered in the U.S. and other countries.
• Android and Google Play are trademarks of Google LLC.
• QR Code is a registered trademark of DENSO WAVE.
•Bluetooth®is a registered trademark of Bluetooth SIG, Inc.
• All other company and product names featured in this manual are trademarks or registered trademarks of
each respective organization.
This is the mark of the Japan Surveying Instruments Manufacturers Association.

ii
CONTENTS
1. PRECAUTIONS FOR SAFE OPERATION ................................................................... 1
2. PRECAUTIONS ............................................................................................................. 4
3. LASER SAFETY INFORMATION .................................................................................. 8
4. PRODUCT OUTLINE .................................................................................................... 9
4.1 RL-HV ................................................................................................................... 9
4.2 Level Sensor LS-80X .......................................................................................... 12
5. USING THE BATTERY ............................................................................................... 15
5.1 Battery Charging ................................................................................................. 15
5.2 Installing/Removing the Battery .......................................................................... 16
5.3 Using the Dry Batteries ....................................................................................... 17
■RL-HV ............................................................................................................. 17
■LS-80X ............................................................................................................ 18
6. BASIC OPERATION .................................................................................................... 19
6.1 Setting up the instrument .................................................................................... 19
■Horizontal Rotation ......................................................................................... 19
■Example Operational ...................................................................................... 20
6.2 Height Alert Function .......................................................................................... 22
6.3 Bluetooth Connection ......................................................................................... 23
■Installing Laser Manager ................................................................................ 23
7. APPLIED OPERATIONON .......................................................................................... 24
7.1 Setting Grades .................................................................................................... 24
■How to set grades (In case of 1S) .................................................................. 25
■How to set grades (In case of 2S) .................................................................. 26
■Example of how to set up ............................................................................... 27
■Matching Mode (Manual Slope) ...................................................................... 29
7.2 Line Control (manual vertical beam alignment) .................................................. 32
8. CHANGING THE SETTINGS ...................................................................................... 34
8.1 Masking (Laser beam shutter) setting ................................................................ 34
8.2 Speed setting ...................................................................................................... 35
8.3 Manual Mode ON/OFF setting ............................................................................ 36
8.4 Height Alert ON/OFF .......................................................................................... 37
9. ERROR DISPLAYS ..................................................................................................... 38
10. CHECK AND ADJUSTMENTS .................................................................................... 39
10.1 Check and Adjust Horizontal Rotation ................................................................ 39
■Horizontal Rotation Grade Error ..................................................................... 39
■Horizontal Rotation Cone Error ....................................................................... 42
■Grade Setting Error ......................................................................................... 43
10.2 Vertical Calibration ............................................................................................. 44
■Checking Calibration ....................................................................................... 44
■Vertical calibration and adjustment ................................................................. 44
11. SPECIFICATIONS ....................................................................................................... 46
12. REGULATIONS ........................................................................................................... 48

1
1. PRECAUTIONS FOR SAFE OPERATION
For the safe use of the product and prevention of injury to operators and other persons as well as prevention
of property damage, items which should be observed are indicated by an exclamation point within a triangle
used with WARNING and CAUTION statements in this instruction manual.
The definitions of the indications are listed below. Be sure you understand them before reading the manual’s
main text.
Definition of Indication
General
Power Supply
WARNING Ignoring this indication and making an operation error could possibly result
in death or serious injury to the operator.
CAUTION Ignoring this indication and making an operation error could possibly result
in personal injury or property damage.
This symbol indicates items for which caution (hazard warnings inclusive) is urged. Specific
details are printed in or near the symbol.
This symbol indicates items which are prohibited. Specific details are printed in or near the
symbol.
This symbol indicates items which must always be performed. Specific details are printed in
or near the symbol.
Warning
Do not use the unit in areas exposed to high amounts of dust or ash, in areas where there is
inadequate ventilation, or near combustible materials. An explosion could occur.
Do not perform disassembly or rebuilding. Fire, electric shock, burns or hazardous radiation
exposure could result.
When securing the instrument in the carrying case make sure that all catches, including the
side catches, are closed. Failure to do so could result in the instrument falling out while
being carried, causing injury.
Caution
Do not use the carrying case as a footstool. The case is slippery and unstable so a person
could slip and fall off it.
Do not place the instrument in a damaged case or in a case with a damaged belt. The case
or instrument could be dropped and cause injury.
Do not wield or throw the plumb bob. A person could be injured if struck.
Warning
Do not disassemble or rebuild the battery or the charger, nor expose to heavy shocks or
vibration. Sparking, fire, electric shock or burns could result.
Do not short circuit. Heat or ignition could result.
Do not place articles such as clothing on the battery charger while charging batteries. Sparks
could be induced, leading to fire.

2
1. PRECAUTIONS FOR SAFE OPERATION
Tripod
Bluetooth wireless technology
Do not use voltage other than the specified power supply voltage. Fire or electrical shock
could result.
Do not use batteries other than those designated. An explosion could occur, or abnormal
heat generated, leading to fire.
Do not use damaged power cords, plugs or loose outlets. Fire or electric shock could result.
Do not use power cords other than those designated. Fire could result.
Use only the specified battery charger to recharge batteries. Other chargers may be of
different voltage rating or polarity, causing sparking which could lead to fire or burns.
Do not use the battery or charger for any other equipment or purpose. Fire or burns caused
by ignition could result.
Do not heat or throw batteries or chargers into fire. An explosion could occur, resulting in
injury.
To prevent shorting of the battery in storage, apply insulating tape or equivalent to the
terminals. Otherwise shorting could occur, resulting in fire or burns.
Do not use the battery or the battery charger if its terminals are wet. Resultant poor contact
or shorting could lead to fire or burns.
Do not connect or disconnect power supply plugs with wet hands. Electric shock could
result.
Caution
Do not touch liquid leaking from batteries. Harmful chemicals could cause burns or blisters.
Caution
When mounting the instrument to the tripod, tighten the centering screw securely. Failure to
tighten the screw properly could result in the instrument falling off the tripod, causing injury.
Tighten securely the leg fixing screws of the tripod on which the instrument is mounted.
Failure to tighten the screws could result in the tripod collapsing, causing injury.
Do not carry the tripod with the tripod shoes pointed at other persons. A person could be
injured if struck by the tripod shoes.
Keep hands and feet away from the tripod shoes when fixing the tripod in the ground. A hand
or foot stab wound could result.
Tighten the leg fixing screws securely before carrying the tripod. Failure to tighten the
screws could lead to the tripod legs extending, causing injury.
Warning
Do not use within the vicinity of hospitals. Malfunction of medical equipment could result.
Use the instrument at a distance of at least 22 cm from anyone with a cardiac pacemaker.
Otherwise, the pacemaker may be adversely affected by the electromagnetic waves
produced and cease to operate as normal.

3
1. PRECAUTIONS FOR SAFE OPERATION
Do not use onboard aircraft. The aircraft instrumentation may malfunction as a result.
Do not use within the vicinity of automatic doors, fire alarms and other devices with
automatic controls as the electromagnetic waves produced may adversely affect operation
resulting in an accident.

4
2. PRECAUTIONS
Charging Battery
• Be sure to charge the battery within the charging temperature range.
Charging temperature range: 10 to 40°C
• Use only the specified battery and the battery charger. Failures caused by using other batteries and battery
chargers are out of warranty including the main unit.
Warranty policy for Battery
• Battery is an expendable item. The decline in retained capacity depending on the repeated charging/
discharging cycle is out of warranty.
Vibration and Impact Protection
• When transporting the instrument, provide protection to minimize risk of severe vibration or impact. Severe
vibration or impacts may affect beam accuracy.
Sudden changes of temperature
• A sudden change in temperature may cause water condensation on the glass used for the laser emission
part. In such a case, let the instrument stand for a while to allow it to adjust to the temperature prior to actual
use.
Storage precautions
• When storing the instrument, keep it in a place not exposed to direct sunlight and at the temperature range
from -30 to 60°C.
• Do not store the wet instrument in the carrying case. If any part of the instrument is wet, thoroughly wipe off
with soft cloth and leave it dry before storing in the carrying case.
Precautions concerning water and dust resistance
The instrument conforms to IP66 specifications for waterproofing and dust resistance.
• Close the battery holder securely.
• Make sure that moisture or dust particles do not come in contact with the terminal or connectors.
Operating the instrument with moisture or dust on the terminal or connectors may cause damage to the
instrument.
• Make sure that the inside of the carrying case and the instrument are dry before closing the case. If moisture
is trapped inside the case, it may cause the instrument to rust.
• If there is a crack or deformation in the rubber packing for the battery holder, stop using and replace the
packing.
• To retain the waterproof property, it is recommended that you replace the rubber packing once every two
years. To replace the packing, contact your local dealer.
Other precautions
• Protect the instrument from heavy shocks or vibration.
• Remove batteries before storing when the instrument will not be used for periods on 1 month or more.
Batteries may leak fluid when left inside the instrument causing malfunction.
• In addition to the laser beam emitted from the rotating laser, the level sensor may be sensitive to smartphone
screens, LED lamps, fluorescent lamps, constriction lamps, and other modulated lights. In this case, turn off
these modulated lights that may be the cause, or block them before performing measurement.
• If an object (glass window, car windshield, etc.) that may reflect a laser beam is close to this instrument, the
level sensor may malfunction. When using this instrument, block the laser beam to the direction of a reflective
object.

5
2. PRECAUTIONS
Examples of malfunctions:
• The display shows [ ] even though the location is not a datum position.
• Errors occur for the datum position.
• The display does not show [ ] even though the location is a datum position.
• Be sure that the laser emitting window of this instrument, and the beam receiving window of the level sensor
are free from dirt (oil, water droplets, etc.). The measurement result may be in error if these windows are dirty.
User
• Wear the required protectors (safety shoes, helmet, etc.) when operating.
Maintenance
• Wipe off moisture completely if the instrument gets wet during survey work.
• Wipe away stain or dirt with soft cloth after dusting.
• Clean storage case using cloth moistened with neutral detergent or water. Do not use ether, benzene, thinner
or other solvents.
• To clean the instrument or the carrying case, lightly moisten a soft cloth in a mild detergent solution. Wring
out excess water until the cloth is slightly damp, then carefully wipe the surface of the unit. Do not use any
alkaline cleaning solutions, alcohol, or any other organic solvents on the instrument or display.
• When removing the instrument from the carrying case, never pull it out by force. The empty carrying case
should be closed to protect it from moisture.
• Check the tripod for loose fit and loose screws.
• Check the instrument for proper adjustment periodically to maintain the instrument accuracy.
Bluetooth Wireless Technology

•Bluetooth function may not be built in depending on telecommunications regulations of the country or the area
where the instrument is purchased. Contact your local dealer for the details.
• Use of this technology must be authorized according to telecommunications regulations of the country where
the instrument is being used. Contact your local dealer in advance.
"12. REGULATIONS"
• TOPCON CORPORATION is not liable for the content of any transmission nor any content related thereto.
When communicating important data, run tests beforehand to ascertain that communication is operating
normally.
• Do not divulge the content of any transmission to any third party.
Radio interference when using Bluetooth technology
Bluetooth communication with the RL-HV uses the 2.4 GHz frequency band. This is the same band used
by the devices described below. As a result, using the RL-HV within proximity to the above devices may
result in interference causing communication failure or reduction of transmission speed.
• Industrial, scientific, and medical (ISM) equipment such as microwaves and pacemakers.
• portable premises radio equipment (license required) used in factory production lines etc.
• portable specified low-power radio equipment (license-exempt)
• IEEE802.11b/IEEE802.11g/IEEE802.11n/IEEE802.11ax standard wireless LAN devices
Although a radio station license is not required for this instrument, bear in mind the following points when
using Bluetooth technology for communication.

6
2. PRECAUTIONS
Regarding portable premises radio equipment and portable specified low-power radio equipment:
• Before starting transmission, check that operation will not take place within the vicinity of portable
premises radio equipment or specified low-power radio equipment.
• In the case that the instrument causes radio interference with portable premises radio equipment,
terminate the connection immediately and take measures to prevent further interference (e.g. connect
using an interface cable).
• In the case that the instrument causes radio interference with portable specified low-power radio
equipment, contact your local dealer.
When using Bluetooth function in proximity to IEEE802.11b/IEEE802.11g/IEEE802.11n/
IEEE802.11ax standard wireless LAN devices, turn off all devices not being used.
• Interference may result, causing transmission speed to slow or even disrupting the connection
completely. Turn off all devices not being used and vice versa.
Do not use the RL-HV in proximity to microwaves.
• Microwave ovens can cause significant interference resulting in communication failure. Perform
communication at a distance of 3m or more from microwave ovens.
Refrain from using the RL-HV in proximity to televisions and radios.
• Televisions and radios use a different frequency band to Bluetooth communications.
However, even if the RL-HV is used within proximity to the above equipment with no adverse effects
with regard to Bluetooth communication, moving a Bluetooth compatible device (including the RL-HV)
closer to said equipment may result in electronic noise in sound or images, adversely affecting the
performance of televisions and radios.
Precautions regarding transmission
For best results
• The usable range becomes shorter when obstacles block the line of sight, or devices such as
PDAs or computers are used. Wood, glass and plastic will not impede communication but the usable
range becomes shorter. Moreover, wood, glass and plastic containing metal frames, plates, foil and
other heat shielding elements as well as coatings containing metallic powders may adversely affect
wireless communication and concrete, reinforced concrete, and metal will render it impossible.
• Use a vinyl or plastic cover to protect the instrument from rain and moisture. Metallic materials should
not be used.
• The direction of the Bluetooth antenna can have adverse effects upon usable range.
Reduced range due to atmospheric conditions
• The radio waves used by the RL-HV may be absorbed or scattered by rain, fog, and moisture from the
human body with the limit of usable range becoming lower as a result. Similarly, usable range may also
shorten when performing communication in wooded areas. Moreover, as wireless devices lose signal
strength when close to the ground, perform communication at as high a position as possible.

• TOPCON CORPORATION cannot guarantee full compatibility with all Bluetooth products on the market.

7
2. PRECAUTIONS
Export Restrictions
These commodities, technology or software were exported in accordance with applicable export control laws
and regulations. Diversion contrary to those laws and regulations, as well as the export laws and regulations
of any countries of reexport, is prohibited.
In consideration for its purchase of commodities, technology or software from Topcon, Purchaser agrees that
it will determine any license requirements to export the items and, as applicable, to reexport or transfer the
items, obtain any license or other official authorization, and carry out any customs formalities for the export or
reexport of the items. Purchaser agrees that it will not reexport or transfer the commodities, technology or
software to Cuba, Iran, North Korea, Syria or Crimea Region of Ukraine without a license or other authorization
from all applicable export control authorities. It is also unlawful to receive, use, transfer, or reexport these items
to persons on all applicable restricted party lists (see e.g.
http://www.bis.doc.gov/index.php/policy-guidance/lists-of-parties-of-concern and
http://eeas.europa.eu/cfsp/sanctions/consol-list_en.htm, and
https://www.meti.go.jp/policy/anpo/englishpage.html)
where prohibited, or to use these items in activities involving missiles or unmanned air vehicles, nuclear
explosive devices or nuclear propulsion projects, chemical or biological weapons which are regulated as WMD
(Weapons of Mass Destruction), or any other prohibited end-use. (see e.g.
https://www.bis.doc.gov/index.php/documents/regulation-docs/418-part-744-control-policy-end-user-and-end-
use-based/file)
Exporting this product (Relating telecommunications regulations)
• Wireless communication module is incorporated in the instrument. Use of this technology must be compliant
with telecommunications regulations of the country where the instrument is being used. Even exporting the
wireless communication module may require conformity with the regulations. Contact your local dealer in
advance.
Exceptions from Responsibility
• The manufacturer, or its representatives, assumes no responsibility for any damage, or loss of profits (change
of data, loss of data, loss of profits, an interruption of business etc.) caused by use of the product or an
unusable product.
• The manufacturer, or its representatives, assumes no responsibility for any damage, or loss of profits caused
by usage different to that explained in this manual.
• The manufacturer, or its representatives, assumes no responsibility for consequential damage, or loss of
profits due to heavy rain, strong wind, high-temperature and humidity, or storing or use of the product under
unusual conditions.
• Product failures caused by rebuilding are out of warranty.
• Cautions and warnings included in this manual do not cover all the possible events.

8
3. LASER SAFETY INFORMATION
The instrument is classified as a class 1 Laser Product according to IEC Standard Publication 60825-1 Ed.3.0:
2014 and United States Government Code of Federal Regulation FDA CDRH 21CFR Part 1040.10 and
1040.11 (Complies with FDA performance standards for laser products except for deviations pursuant to Laser
Notice No.56, dated May 8, 2019.)
Warning
• Use of controls or adjustments or performance of procedures other than those specified herein may result in
hazardous radiation exposure.
• Follow the safety instructions on the labels attached to the instrument as well as in this manual to ensure safe
use of this laser product.
• Never intentionally point the laser beam at another person. The laser beam is injurious to the eyes and skin.
If an eye injury is caused by exposure to the laser beam, seek immediate medical attention from a licensed
ophthalmologist.
Caution
• Perform checks at start of work and periodic checks and adjustments with the laser beam emitted under
normal conditions.
• When the instrument is not being used, turn off the power.
• When disposing of the instrument, destroy the battery connector so that the laser beam cannot be emitted.
• Avoid setting the instrument at heights at which the path of the laser may strike pedestrians or drivers at head
height. Operate the instrument with due caution to avoid injuries that may be caused by the laser beam
unintentionally striking a person in the eye.
Beam aperture
Visible laser
Laser output: 2.4mW

9
4. PRODUCT OUTLINE
Parts of the instrument
4.1 RL-HV
Handle
Battery holder
Control panel
Sight Rotary head
Beam aperture
Battery holder knob

10
4. PRODUCT OUTLINE
Control panel
Key Nomenclature Function
Enter key End Operation of Data Input
Menu/Escape key Selects a menu item.
Cancels input or escape to previous status.
1S X axis selection key/
Alignment key
Horizontal rotation: Changes to the grade setting screen for X axis.
Vertical rotation: Changes to the Alignment Mode.
2S X/Y axis selection key/
Alignment key
Horizontal rotation: Changes to the grade setting screen for each
axis.
Vertical rotation: Changes to the Alignment Mode
Arrow keys The arrows indicate code selection, digit shift, and number input during
grade setting, and designates direction during masking setting.
Power switch Turn the instrument ON or OFF.
Enter key
Power switch
X/Y axis selection key /
Alignment key / Up key
Level vial
Arrow keys
Display
Menu key /
Escape key
For Vertical Rotation
X axis selection key /
Alignment key / Up key
RL-HV 1S

11
4. PRODUCT OUTLINE
Display
Mask Mode display
(Blinks one digit at a
time during self- level-
ing)
Battery remaining
X axis grade
Manual Mode display
Y axis grade (2S only)
Rotation speed
6: 600 rpm
3: 300 rpm
Ample power for operation
Ample power for operation
Power remaining for operation*1)
Power remaining for operation
Near power depletion*2)
Power depletion, Laser will stop.
*1), *2) The laser speed will be 500 rpm.
Dry battery type: Replace with new batteries.
Rechargeable battery type: Charge the battery.
(Blinks one digit at a
time during self- level-
ing)

12
4. PRODUCT OUTLINE
Parts of the instrument
4.2 Level Sensor LS-80X
Power switch
Detective precision switch
Buzzer sound switch
Indicator LS-80X Display
Beam receiving window
Index
(Back side of the instrument)
Buzzer
Indicator
Auto-cut off function
The power will be turned off automatically if no laser beam is detected for approximately 30 minutes.
(To turn on the level sensor, press the power switch again.)
Turn the beam receiving
window side towards RL-HV
to detect the laser beam.
Locate the datum position "---"
by moving the LS-80X up and
down. Directional arrows and
audio signals assist in locating
the datum position as the laser
strikes the beam receiving
window. (Top of LS-80X is 40mm
(1 9/16") from on-grade index for
offset marking.) The indicators
are located on front and back
sides of the instrument.
Volume of the sensor buzzer can
be alternately switched to
Quiet/Loud/OFF by pressing the
switch.
Two detective precision options
are available, normal precision
(±2mm) and high precision
(±1mm). By pressing this switch,
the precision options are
switched alternately.
Confirm the precision choice by
the indicator. (Normal precision
is the default setting each time
the sensor is turned on.)
The power switch turns ON or
OFF by pressing.

13
4. PRODUCT OUTLINE
Display

• The warning displays *1 and *2 are the functions that the LS-80X detects alarm signal from the RL-HV.
The LS-80X can be canceled the alarm detection from the RL-HV. To be canceled the detection; Press the
power switch while pressing the buzzer sound switch when powering on.
The detecting function will start normally by pressing the power switch again.
High precision mode
Normal precision mode
Higher than datum position
(Buzzer sound: High frequent beep sound)
Move the sensor downward.
Datum position
(Buzzer sound: Continuous beep sound)
Lower than datum position
(Buzzer sound: Low frequent beep sound)
Move the sensor upward.
Battery remaining display
Height alert warning of rotating laser*1
A blink and a buzzer sound signifies
that the height alert function of the RL-
HV is operating.
Rotating laser battery warning*2
A blink shows that the RL-HV power is
low.
Battery is sufficient.
The power is low, but sensor is
still usable.
Dead battery.
Replace the dry battery with
new one.

14
4. PRODUCT OUTLINE
Detective Range

15
5. USING THE BATTERY
Be sure to charge the battery fully before using it for the first time or after not using it for long periods.

• The charger will become rather hot during use. This is normal.
• Do not use or charge batteries other than those designated.
(Battery pack: BT-79Q AC/DC converter: AD-15E)
• Do not charge the battery just after charging is completed. Battery performance may decline.
• Recharging should take place in a room with an ambient temperature range of 10 to 40°C (50 to 104°F).
• Do not perform charging with others except the AC/DC converter AD-15E.
• For longer battery life, conform to the suggested charging time to the extent possible.
• The battery source will discharge when stored and should be checked before using with instrument.
• Do not recharge the battery when fully charged. Doing so will lower battery performance.
• Be sure to charge stored battery source every 3 or 6 months and store in a place at 30°C or below. If you
allow the battery to become completely discharged, it will have an effect on future charging.
• Batteries generate power using a chemical reaction and as a result have a limited lifetime. Even when in
storage and not used for long periods, battery capacity deteriorates with the passage of time. This may result
in the operating time of the battery shortening despite having been charged correctly. In this event, a new
battery is required.
PROCEDURE
1. Select a power plug which will be fit to the shape of the
power outlet to be used.
2. Install the selected power plug to the AC/DC converter as
the right figure.
3. Connect the AC/DC converter into the charge port of the
battery pack.
4. Plug the AC/DC converter into the wall outlet.
When charging starts, the LED is solid red. The LED is off
when charging finished.
5. Unplug the AC/DC converter from the battery pack and
disconnect the AC/DC converter power plug from the wall
outlet
5.1 Battery Charging
Power plug
Power plug
AC/DC converter
(AD-15E)
LED
Plug
AC/DC converter
(AD-15E)
Battery pack
(BT-79Q)

16
5. USING THE BATTERY

• Charging time:
BT-79Q: about 13 hours (at 20°C)
(Charging can take longer than the times stated above when temperatures are either especially high or low.)
• Charging lamp:
PROCEDURE Installing the battery
1. Insert the battery pack into the battery holder.
2. Insert the battery holder. Tighten the battery holder knob
to “LOCK” side.
PROCEDURE Removing the battery
1. Remove the battery holder by turning battery holder knob
to "OPEN" side.
2. Grasp the specified place on the battery holder, which is
shown on the right, and remove the battery pack.

• It is possible to remove the battery pack from the battery
holder and use the dry batteries.
LED Description
Red lamp lit On charge
Off Fully charged
Red lamp blinking
slowly
Ni-MH battery pack protection feature is working automatically.
Let the battery pack fall within its designated charging temperature range (10 to 40°C),
unplug the AC/DC converter from the battery pack and then check the LED status. Solid
red LED indicates charging has started again. Slow blinking red LED indicates the Ni-MH
battery is still out of the charging temperature range. Wait for a while, unplug the AC/DC
converter and then check the LED again.
The instrument has a protection feature which works when the batteries are under a high
or low temperature state. In such a case, charging will stop automatically to protect nickel
hydride batteries.
Red lamp blinking
quickly
The battery is not charged properly. Please contact your local dealer.
5.2 Installing/Removing the Battery
Battery holder (DB-82)
Battery pack (BT-79Q)

17
5. USING THE BATTERY
■RL-HV

• Replace all 4 dry batteries with new ones at the same time.
• Do not mix used and new dry batteries, and do not mix different types of dry batteries together.
• Generally, performances of dry battery deteriorate temporarily in low temperature, but recover in normal
temperature.
• Dry batteries are sold separately.

• It is possible to remove the dry batteries from the DB-82 battery holder and use the battery pack BT-79Q.
PROCEDURE Replacing the dry batteries
1. Remove the battery holder by turning battery holder knob
to "OPEN".
2. Remove the old batteries and replace with new four dry
batteries (D alkaline batteries), matching [+] and [-] as
shown in the figure.
3. Insert the battery holder. Tighten the battery holder knob
to “LOCK” side.
5.3 Using the Dry Batteries
Battery holder (DB-82)