Sibata LB-6N2 User manual

CODE 080170-22
— Main Unit —
Thank you for purchasing this product.
•This operation manual describes precautions that are important for preventing accidents as
well as procedures used to handle the product.
•Read this operation manual and the attached warranty thoroughly before use, and use the
product correctly.
•After reading this operation manual and the warranty, keep them handy for future reference.
OPERATION MANUAL

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Table of Contents
Before Use .............................................................................5
About This Operation Manual ..................................................5
Product Contents .....................................................................5
Safety Precautions................................................................5
Users (Important) .....................................................................5
Graphical Symbols...................................................................6
Cautions for Use ......................................................................8
1Overview..........................................................................9
2Features...........................................................................9
3Names of Parts..............................................................10
4Connector Cable ...........................................................12
4.1 Connecting Connectors .................................................12
4.2 Disconnecting Connectors ............................................12
5Wearing the Instrument................................................13
5.1 Wearing the Control Unit ...............................................13
5.2 Wearing the Detector Unit .............................................13
6Power Supply................................................................14
6.1 Using the AC Power Supply ..........................................14
6.2 Using the Internal Nickel Metal-Hydride Batteries .........15
6.3 Backup Batteries ...........................................................15
7Startup Screen ..............................................................16
7.1 Main Menu Screens ......................................................17
8Measurement Procedure..............................................18
8.1 Operation Flow for Each Measurement.........................18
8.1.1 Countdown Timer Measurement ........................18
8.1.2 Manual Measurement.........................................19
8.1.3 Timed Measurement ..........................................19

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8.2 Data Logging .................................................................19
8.3 Preparation for Measurement........................................20
8.3.1 BG Measurement ...............................................20
8.3.2 When and How to Replace Filters ......................21
8.3.3 SPAN Measurement—Sensitivity Correction .....22
8.4 Starting and Stopping Measurements ...........................24
8.4.1 Countdown Timer Measurement ........................24
8.4.2 Manual Measurement.........................................25
8.4.3 Timed Measurement ..........................................25
8.5 Process After Measurement Is Finished (Cleaning Inside
Detector Unit) .............................................................27
9Basic Settings...............................................................28
9.1 Countdown Timer Measurement Settings .....................28
9.2 Manual Measurement Settings......................................29
9.3 Timed Measurement Settings .......................................30
9.3.1 Setting the Internal Clock ...................................30
9.3.2 Timed Measurement Settings ............................32
9.4 Data Logging Settings ...................................................33
9.4.1 Logging Modes...................................................33
9.4.2 Specifying Settings.............................................33
9.4.3 Setting the Logging Cycle Time .........................34
10 Function Settings .........................................................35
10.1 Memory Capacity and Deleting Data..........................35
10.1.1 Memory Capacity ..............................................35
10.1.2 Deleting Data ....................................................36
10.1.3 Memory Capacity and Memory Consumption ...37
10.2 Serial Output ..............................................................39
10.3 Entering the K Factor .................................................40
10.3.1 Conversion to Mass Concentration Values .......40
10.3.2 Determining the K Factor ..................................40
10.3.3 Entering the K Factor ........................................41
10.4 Buzzer Sound.............................................................41
10.5 Backlight.....................................................................42

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10.6 Alarm Settings (Concentration Alarm)........................43
10.7 Auto Start Settings .....................................................43
10.8 Open Collector Output................................................44
10.9 Auxiliary Function Settings .........................................45
10.10 Hour Meter Settings ...................................................47
10.11 Firmware Version .......................................................47
11 Communications...........................................................48
12 List of Display Terms ...................................................48
13 Optional Parts and Consumables ...............................50
13.1 Stand for Detector Unit...............................................50
13.2 Suction Pump Unit......................................................51
13.2.1 Constituent Parts ..............................................51
13.2.2 Tools Required..................................................51
13.2.3 Installing the Lower Parts of the Suction Pump
Unit ...................................................................52
13.2.4 Installing the Upper Parts of the Suction Pump
Unit ...................................................................53
14 Troubleshooting ...........................................................54
15 Specifications ...............................................................57
16 Precautions for Maintenance, Storage, and
Transport.......................................................................58
17 Preferred Procedures for Requesting Repairs to
Products Used in Environments Exposed to
Asbestos .......................................................................58
18 Product Disposal ..........................................................59
19 Warranty ........................................................................59
20 Disclaimers ...................................................................59

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Before Use
About This Operation Manual
•Information in this operation manual is subject to change without notice in the
interest of product improvement.
•Every effort has been made to ensure that the information contained in this
operation manual is correct. If you discover any errors or omissions, however,
please contact your Sibata representative.
•The copyright of this operation manual belongs to Sibata Scientific Technology
Ltd. This operation manual, or any part thereof, may not be reproduced, reprinted,
or altered in any form without prior written permission from Sibata Scientific
Technology Ltd.
Product Contents
Check the package for the following items before using the product.
Detector unit ······················· 1
Control unit ························· 1
Connector cable··················· 1
AC adapter ························· 1
Clip ··································· 3
USB cable (A-miniB Type) ···············1
Soft case (for holding the control unit)····1
Warranty ·································1
Combination standard scattering plate and zero filter (with filter ×1*, protective
cap ×1) ························································································1
* The filter is attached to the combination standard scattering plate and zero filter.
Operation manuals for main unit, communication software (Japanese,
English)················································································1 each
Quick reference manual (Japanese, English) ······································1
Manufacture's Inspection Result·······················································1
Communication software for the LD-6N/6N2 (CD-ROM) ························1
Check the contents of the package before use. If any parts are broken or missing, contact the distributor
where you purchased the product.
Safety Precautions
The precautionary information in this operation manual is provided to ensure the
safe use of the product and to prevent property damage and injury to you and other
people. It is all important for ensuring safety, so be sure to read it thoroughly before
using the product and observe it during use.
Users (Important)
This product should only be operated by trained and experienced operators that
understand the specialized technology and dangers involved. Untrained or
currently being trained operators should only operate the product under close
supervision by a person that is already trained or has sufficient specialized
experience. This operation manual is written assuming the product will be operated
by a person that understands the risks of operating the product.

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Graphical Symbols
The degree of danger involved in using the product without observing the indicated
precautionary information is indicated by one of two labels: WARNING or
CAUTION. Always observe the precautionary information indicated with these
labels, which is important for ensuring safety.
Labels Indicating Degrees of Damage or Injury
Indicates a potentially hazardous situation which, if not
avoided, will result in serious injury or death.
Indicates a potentially hazardous situation which, if not
avoided, may result in injury or equipment damage.
•This product is not explosion proof, so do not use it near combustible or flammable
materials. Doing so could cause explosion or fire.
•Do not burn the product in a fire. Doing so could cause explosion or fire.
•Only use the provided AC adapter for charging the internal batteries. Not doing so
could cause battery leakage, heat generation, or explosion.
•Do not leave the product inside cars in the hot sun, or store it in strong direct
sunlight, or in front of heating equipment. Doing so could cause explosion or fire.
•Do not use the product in an environment with corrosive gases. Doing so could
cause injury, electric shock, equipment damage, or fire.
•The normal operating temperature range of the product is 0 to 40 °C, with humidity
between 5 and 90 % RH (and no condensation). Do not use the product outside
this temperature and humidity range. Doing so could cause injury, electric shock,
equipment damage, or fire.
•Do not locate equipment that generates significant vibration near the product.
Doing so could cause injury, equipment damage, or an accident.
•Do not apply water or chemicals to the product. Doing so could cause injury,
electric shock, equipment damage, or fire.
•Do not put your fingers or foreign objects in the product. Doing so could cause
injury, electric shock, equipment damage, or fire.
•Do not install the product in locations with poor ventilations or subject to high
humidity or dust levels. Doing so could cause injury, electric shock, equipment
damage, or fire.

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•When finished using the product, be sure to turn OFF the power switch and
disconnect the AC adapter from the power outlet. Not doing so could cause fire or
a short circuit.
•Never attempt to connect to the connector using wire or other metal objects, or any
other method not specified in this manual. Doing so could cause explosion, fire, or
equipment damage.
•Do not touch or operate the product with wet hands. Doing so could cause
equipment damage.
•Do not place objects on the AC adapter cord. Doing so could cause fire, a short
circuit, or electric shock.
•Do not excessively bend or bundle the AC adapter cord, connector cable, or USB
cable. Doing so could cause fire or equipment damage.
•Do not modify or damage the AC adapter cord, connector cable, or USB cable.
Doing so could cause fire or equipment damage.
•If you notice smoke or an unusual smell, immediately turn OFF the power switch
and remove the AC adapter cord and the USB cable from the power outlet.
Continuing to use the product in an abnormal state may result in fire.
•Do not touch the AC adapter cord or USB cable with wet hands. Doing so could
cause electric shock or equipment damage.
•Before cleaning or inspecting the product, disconnect the AC adapter cord and
USB cable from the power outlet. Not doing so could cause electric shock or a
short circuit.
•Check the AC adapter cord, connector cable, and USB cable for cuts or other
damage to the cable jacket before operating the product. Using the cables in a
damaged state could cause fire or electric shock.
•If you hear the sound of thunder, do not approach the equipment, the AC adapter,
or the power outlet. Doing so could cause injury or electric shock.
•Always grip the AC adapter itself to unplug the AC adapter from the power outlet.
Not doing so could cause fire or electric shock.
•Remove the AC adapter from the power outlet when not using the product for long
periods. Not doing so could cause fire, a short circuit, or electric shock.
•Do not attempt to disassemble, repair, or modify the product by yourself. Doing so
could cause not only in equipment damage, but also electric shock or fire.
•Do not install the product in locations that are subject to strong magnetic fields.
Doing so could cause equipment damage or other problems.

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•Keep the product away from sources of noise. Not doing so could cause
equipment damage or other problems.
•Do not subject the product to vibrations or major shocks, such as dropping, impact,
etc. Doing so could cause equipment damage or other problems.
•Do not place any objects on top of the product. Doing so could cause equipment
damage or other problems.
•Do not allow dust or liquids to remain on the product. Wipe them off with a dry cloth
or other means. Not doing so could cause equipment damage or other problems.
Cautions for Use
•This product uses a laser. The semiconductor laser*1 used in this instrument is
dangerous to look directly at the laser light. In addition, to avoid skin damage, do
not point the laser directly at your body. Accordingly, never disassemble or modify
the interior of the detector unit.
*1 Laser safety regulations: IEC 60825-1 and JIS C 6802
•This product measures relative concentration levels. To determine the mass
concentration of dust, the mass concentration conversion factor (K factor) must be
determined first and then used to convert the measurement values.
After measurements are finished, converted mass concentration values can be
displayed on the LCD screen. For more information see 10.3 Entering the K
Factor.
•The specified upper measurement limit for the product is 100,000 cpm. This is the
upper limit for the relative concentration range used to determine instantaneously
high concentration levels and is not guaranteed for measuring continuously high
concentrations.
Measuring a series of high concentrations could reduce sensitivity, cause
instrument failure, or other problems due to contamination of the optical
components inside the detector or clogging of the fan motor.
•This product includes a data logging function that records measurement values in
internal memory. However, it is recommended that the recorded measurement
data be uploaded via the USB cable and saved on a computer as soon as possible.
Also, check the available memory capacity immediately before starting the next
measurement and, if necessary, delete data to provide adequate space in
memory.
•Please be aware that in the unlikely event of a product failure, Sibata bears no
responsibility to compensate for data not acquired or recorded, and is not
responsible for loss of data or for other direct or indirect damages incurred from
such loss. Be sure to back up data on a regular basis in case of an accident or
failure. It is recommended to perform operational checks prior to use as well as
periodic inspections.

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1 Overview
The LD-6N2 digital dust indicator is a portable relative dust concentration analyzer
that is capable of measuring the dust exposure to individuals. It is based on the
Sibata LD-6N, but is smaller and lighter.
Just like the LD-6N, it features separate detector and control units to facilitate being
worn by workers. However, the detector unit can also be fixed for measuring dust
concentration levels in work areas or for a wide variety of other measurement
applications.
2 Features
•Both the volume and weight have been reduced to about 75 % compared with the
previous model.
•The number of digits of the mass concentration conversion factor (K factor) has
been increased by one, so a more accurate conversion to mass concentration is
possible compared with the previous model.
•Measurement values can be confirmed in terms of either accumulated values
(COUNT) and instantaneous values (CPM) by switching between modes.
•The measurement range is from 0 to 100,000 cpm.
•Measurement values can be recorded in internal memory in the main unit.
•Recorded measurement values can be uploaded to a computer using dedicated
communications software and a USB cable.
•Connectors are provided on both the detector and control units to allow the
connector cable to be completely removed for easier storage.
•The system can be operated on AC power even while charging the batteries.
•When the optional items are used it is possible to collect PM4 and also carry out
real-time measurements.
The specified upper measurement limit is 100,000 cpm. This is the upper limit for the
relative concentration range used to determine instantaneously high concentration
levels and is not guaranteed for measuring continuously high concentrations.
Measuring a series of high concentrations could reduce sensitivity, cause instrument
failure, or other problems due to contamination of the optical components inside the
detector unit or clogging of the fan motor.

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3 Names of Parts
Detector Unit
Major Components
Detector unit
Connector cable
Control unit
Air sampling port
Connector for connector cable
Combination standard
scattering plate and zero filter
(referred to as both a standard
scattering plate and a zero filter in
the operation manual)
Protective cap
Fan uni
t
Bracket for wearing the unit
Output switch (black) and
SPAN switch (white)

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LCD Screen
Control Panel
Control Unit
Remaining battery level
Timer ON indicator
Data logging mode ON
indicator
Measurement units
Measurement value, setting
value, and status display
Measurement in
progress indicator
Ke
y
lock ON indicato
r
Measurement value overflow Mode/time
[UP] switch
[DOWN] switch
Battery charge
indicator LED
A red LED illuminates when
the internal nickel
metal-hydride battery is
being charged.
When charging is completed
the LED goes OFF.
[MODE/ESC] switch
[
START/STOP
]
switch
[KEY LOCK] switch
When pressed the key is
locked, and switch
operations are not
received on the control
panel.
When held being pressed
the key is unlocked, and
if it continues to be
pressed the key is locked
again, and is not
unlocked until it is
pressed again.
Power connector
LCD screen
Output connector
(SIGNAL)
Connector for connector cable
Operation indicator LED
During measurement a green
LED flashes.
Power switch
USB connector (A-miniB)
Control panel

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4 Connector Cable
4.1 Connecting Connectors
The connector cable is connected to the detector unit and control unit in the same
manner, but note that the connector cable is designed with an orientation that
prevents it from being connected in the opposite orientation.
Align the connector key with the corresponding key slot.
When fully connected, the connector becomes locked to prevent becoming
disconnected.
4.2 Disconnecting Connectors
Hold the connector by the circled section (see figure below) and pull it upward. Do
not rotate the connector.
Connector cable
Align the keys
with the key slots.
Insert until an
audible click
sound is emitted.
Connector cable
Grip here and pull upward.

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5 Wearing the Instrument
5.1 Wearing the Control Unit
Open the cover on the soft case and insert the control unit into the case from above
(it is already inserted into the soft case at the time of purchase).
Close the soft case cover and connect the connector cable via the hole in the
cover.
Use the belt loop provided on the back of the soft case to strap the unit onto the
user.
5.2 Wearing the Detector Unit
Pass the belt through the bracket on the rear of the detector unit, and wear the
detector unit. The belt can be passed in either the vertical direction or the lateral
direction. Also, fit the clip that is provided to the bracket on the rear of the detector
unit, and secure the detector unit by clipping the clip to the user's clothes. The clip
can be installed in any orientation.
Three clothes clips are provided. If the connector cable is too slack, use the
provided clothes clips to clip the cable to any convenient location.
Clip

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6 Power Supply
This product has three power supplies: an AC power supply using the provided AC adapter, a
USB power supply used when connected to an operating computer using the provided USB
cable, and the nickel metal-hydride battery in the control unit.
6.1 Using the AC Power Supply
Insert the provided AC adapter into the power supply
connector on the side of the control unit and then plug
the AC adapter into a 100 V AC power outlet. In this
state, the product can be operated using the AC power
supply.
Charging the Batteries
It normally takes about four hours to charge the batteries (The battery charge indicator LED
remains illuminated for several minutes after the batteries are fully charged.). Charging stops
automatically and the battery charge indicator LED switches OFF.
The product can be operated using AC power by turning the power switch ON.
Battery charging times may be longer depending on the battery storage conditions,
charge/discharge conditions, deterioration, and other factors.
•Only use the AC adapter that is provided with the product.
•Avoid excessively plugging and unplugging the AC adapter.
•Be sure to charge the batteries before using the product for the
first time after purchase or using it for the first time after an
extended period of disuse.
•Charge the batteries before storing the product for long periods.
Charge the batteries at least once every 6 months even when
the product is not used.
•When the batteries are over discharged, it can take several
minutes for the battery charge indicator LED to illuminate. If the
battery charge indicator LED does not illuminate after five
minutes, there is a possibility that the life of the internal nickel
metal-hydride batteries has expired. Contact your Sibata
representative or the distributor where you purchased the
product.
•If a mobile battery for a smartphone is used for operating the
USB power supply, depending on the type of mobile battery
there is a possibility that operation will stop a few seconds after
startup. Before measurement, check that the instrument has
been operating for several minutes or more.
•Note that the battery level indicator does not appear on the LCD screen while the system
is being operated on AC power.
•When the AC adapter is connected, the internal nickel metal-hydride batteries are charged
whether the power switch is ON or OFF. While charging, the battery charge indicator LED
illuminates.

15
Battery Level Indicator and Estimating Charge Level
The battery level indicator is only displayed when the system is
being operated using the internal nickel metal-hydride battery.
It is not displayed when the AC power supply or the USB
power supply is being used.
If the battery level indicator indicates less than 10 % charge,
the batteries should be recharged as soon as possible.
If the battery level indicator indicates 0 % and is flashing, all
other indicators are shut OFF. If the AC adapter is then
plugged in with the power switch ON, the system will not
resume normal operation using AC power. Turn the power
switch OFF and then back ON again.
Charging Environment
Charge the batteries in an environment with an ambient temperature between 10 °C and
40 °C*, or optimally between 15 °C and 30 °C.
Charging the batteries with the ambient temperature outside the optimal range is possible, but
doing so will shorten battery life.
Therefore, we recommend charging the batteries within the optimal temperature range.
* This is different from the operating temperature range specified for the product.
Memory Effects
In general, repeatedly recharging nickel metal-hydride batteries before the batteries are
completely depleted can cause a drop in the discharge voltage. This phenomenon is known
as memory effect. If the continuous operating capacity decreases due to this effect, it can be
eliminated by fully charging and discharging the batteries for one or two cycles.
6.2 Using the Internal Nickel Metal-Hydride
Batteries
If the internal nickel metal-hydride batteries are charged, the product can be operated using
the internal batteries by turning the power switch ON, without using the AC power supply or
the USB power supply.
If the system is running on AC power or USB power and the AC power supply or USB power
supply is interrupted, for whatever reason, then the product will continue to operate using
power from the internal nickel metal-hydride batteries so that measurements can continue to
be performed.
6.3 Backup Batteries
In addition to the nickel metal-hydride batteries used for operating the product, an internal
backup battery is also included for providing backup power to the internal clock. This battery
is able to provide backup power for about five years from the date of manufacture.
Internal clock: Used to determine the current time for timed measurements, logging data, and
other functionality.
If the backup battery capacity drops and the internal clock is not backed up, it could
cause symptoms such as the internal clock to be reinitialized when the power switch is
OFF. The backup battery is not rechargeable, so it must be replaced. Contact your Sibata
representative or the distributor where you purchased the product to request repairs.
(flashes with other indicators OFF)
70 % min. 30 % min.
10 % max.
10 % min.
0 %

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7 Startup Screen
Graphics: In this operation manual, the LCD screen status is indicated as follows.
Display example
002 ···· Steady illumination (black)
002 ···· Flashing (gray)
Turn the power switch ON and confirm that each item is displayed on the LCD
screen.
When the power is turned ON, the following screen appears and can be toggled to
other screens in the sequence indicated below by pressing [DOWN].
•The displayed screen can be changed by pressing [UP] or [DOWN].
•The instantaneous value display displays the current measurement value.
•The converted mass concentration value is not displayed in the manual
measurement mode.
[
DOWN
]
[DOWN]
[
DOWN
]
Accumulated
value display
Battery level indicator
(not displayed when connected to
AC or USB power)
Operating or setting status
Unit
Measurement value (the last
measurement value from the
previous measurement)
Instantaneous
value display Count per minute
Converted mass
concentration
value display

17
7.1 Main Menu Screens
After the power switch is turned ON and the dust measurement screen is displayed,
each press of [MODE/ESC] toggles the display to a different screen, in the
sequence indicated below.
Dust measurement
screen
Background
measurement
screen
System screen
(function settings)
Option screen
(basic settings)
[MODE/ESC]
[MODE/ESC]
[MODE/ESC]
[MODE/ESC]

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8 Measurement Procedure
8.1 Operation Flow for Each Measurement
There are three types of measurements that can be taken with this product:
•Countdown timer measurement, •Manual measurement, and •Timed measurement.
The flow for each type of measurement is shown in the following diagram.
8.1.1 Countdown Timer Measurement
This measurement mode automatically stops measurement after a previously
specified measurement time (between 1 minute and 999 hours and 60 minutes,
namely 1000 hours) elapses. See P. 28
Measurement time (setting)
Manual start by
switch operation
Forced stop by
switch operation
Automatically stops after
specified measurement
time elapses
•Countdown timer
measurement •Manual measurement •Timed measurement
BG measurement
(P. 20)
SPAN measurement
(P. 22)
Measurement time
setting (P. 28)
Start measurement
(manual)
Finish measurement
(auto)
Clean inside detector
unit (P. 27)
BG measurement
(P. 20)
SPAN measurement
(P. 22)
Measurement time
setting (P. 29)
Start measurement
(manual)
Finish measurement
(manual)
Clean inside detector
unit (P. 27)
BG measurement
(P. 20)
SPAN measurement
(P. 22)
Measurement time
setting (P. 30)
Measurement start
time setting (P. 32)
Measurement standby
screen
Start measurement
(auto)
Finish measurement
(auto)
Clean inside detector
unit (P. 27)

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8.1.2 Manual Measurement
This method uses [START/STOP] to start and stop measurements. See P. 29
8.1.3 Timed Measurement
This method automatically starts measurement at the previously specified
measurement start time.
Measurements are stopped by either of the following two ways. See P. 30
8.2 Data Logging
The following two types of logging functions are available:
•Overwrite •One-time
In any of the three measurement modes described above, measurement data can
be recorded to internal memory in the LD-6N2 control unit by setting the logging
mode to overwrite or one-time before measuring. The provided USB cable can be
used to upload the recorded data to a computer installed with the dedicated
LD-6N/6N2 software, where it can be saved in CSV format. See P. 33
•Related Accessories
USB cable: A-miniB type
Software for the LD-6N/6N2: CD-ROM (including USB driver)
Operation Manual: Communication Software
Number of measured data points: 40,000 max.
Number of measurements: 60 max.
•Measurements are automatically stopped after a pre-specified measurement
time elapses.
•Measurements are stopped at any desired time by pressing a switch.
Measurement time
Manual start by switch operation Manual stop by switch operation
Measurement time (setting)
Standby time
Manual start by switch operation
Time setting/Measurement
starts automaticall
y
Manual stop by
switch operation
Automatically stops after specified
measurement time elapses

20
8.3 Preparation for Measurement
8.3.1 BG Measurement
Background (BG) refers to a false reading that is output when the detector is filled
with clean air. BG levels lead to excessive dust measurement values.
Therefore, this product includes a function that measures the background level
before measuring dust and then subtracts that value (BG value) from dust
measurements.
Remove the air sampling port, and install the combination standard scattering
plate and zero filter in the orientation shown below (with the zero filter at the
bottom). Insert the combination standard scattering plate and zero filter until the
output switch is pressed. Cover the scattering plate with the protective cap.
In the main menu, press [MODE/ESC] until the "BG" screen is displayed.
To ensure the detector unit is filled with clean air, wait for approximately one
minute after the zero filter installation. Then press [START/STOP] to start the BG
measurement.
The measurement finishes after six seconds.
After the measurement is finished, the BG measurement value is displayed on the
screen and recorded inside the product.
Then, the next time a measurement is performed, this BG value is automatically
subtracted from the measurement value.
6 seconds
Make sure
it is oriented
correctly.
Protective cap
Zero filter
Air sampling
p
ort
Scattering plate
Output switch