Sibata LD-5D User manual

CODE 080000-5
Operation Manual
Thank you for purchasing this product.
Be sure to read this operation manual before use.
Handle this product in accordance with the explanations described in this manual.
After reading this operation manual, keep it with the warranty in a safe place.
If you find any unclear points in this manual, please contact your Sibata distributor.
Digital Dust Indicator
LD-5D

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Table of Contents
1 Safety Precautions ............................................................................................. 3
2 Overview.............................................................................................................. 6
2.1 Features ..................................................................................................................6
2.2 Operating Principle................................................................................................ 6
3 Construction ....................................................................................................... 7
3.1 Description of Parts...............................................................................................7
3.2 Description of the Modes....................................................................................13
4 Preparation for Measurement .......................................................................... 14
4.1 Inspection of the LD-5D.......................................................................................14
4.2 Power ON ..............................................................................................................14
4.2.1 When Using Dry Cell Batteries ························································14
4.2.2 When Using an AC Adapter····························································15
4.3 Setting Up the Current Time ...............................................................................15
4.4 Measuring the Background (BG)........................................................................19
4.5 Automatic Sensitivity Adjustment (SPAN CHECK)..........................................20
5 Procedures for Measurement .......................................................................... 21
5.1 Down Timer Measurement ..................................................................................21
5.1.1 Starting the Measurement ······························································21
5.1.2 Graph Display··············································································21
5.1.3 Mass Concentration Display ···························································22
5.1.4 Converting to Mass Concentration ···················································22
5.2 Manual Measurement ..........................................................................................24
5.2.1 Starting Measurement ···································································24
5.2.2 Graph Display··············································································25
5.3 Logging Measurement.........................................................................................25
5.3.1 Conditional Setup for Logging ·························································25
5.3.2 Displaying Logging Data ································································29
5.3.3 Retrieving Logging Data·································································30
6 Procedures for Set Up ...................................................................................... 31
6.1 K FACTOR.............................................................................................................31
6.2 AUTO RAN ............................................................................................................31
6.3 RTCSET.................................................................................................................32
6.4 LCD ADJUST ........................................................................................................35
6.4.1 LCD CONTRAST ·········································································35
6.4.2 LCD BACKLIGHT ·········································································36
6.5 RANGE ..................................................................................................................38
6.6 I/F ...........................................................................................................................38
7 Analog/Pulse Output ........................................................................................ 39
7.1 Analog Output ......................................................................................................39
7.2 Pulse Output.........................................................................................................39
8 Precautions for Maintenance, Storage, and Transport .................................. 40
9 Troubleshooting ............................................................................................... 43
10 Specifications ................................................................................................. 44
11 Warranty.......................................................................................................... 45

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1Safety 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.
All of the precautionary information is important for ensuring safety. Therefore, be sure to read
and understand the information 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.
●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, could result in serious injury or possibly death.
Indicates a potentially hazardous situation which, if not
avoided, may result in minor to moderate injury or
equipment damage.
The semiconductor laser used in this instrument is classified as a Class 3B laser, based on
laser safety regulations (IEC 60825-1 and JIS C 6802). As such, it 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 detector.
This product is a device for high concentration environments, but is not waterproof or
explosionproof. Do not use near highly combustible or inflammable material, and do not suck
gas into the product. It may cause explosions and fires. Do not suck briny air, corrosive gases,
and chemicals into the product. It may cause malfunctions.
Fires are strictly prohibited. Do not throw this product into fire. It may cause explosions and fires.
This product is a dust meter for high concentration environments (Under 100 mg/m3). Do not
use this product for any other uses than what is written in this operation manual. Using this
product in any other way may cause malfunctions or injury to the human body.

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Make sure the product does not come in direct contact with water. It may cause electrocution or
fires.
Do not apply strong impact to the product or drop it. It may cause malfunction of the product or
accidents.
Do not connect to the connector by wires or other metals, or any other methods than what has
been indicated in this operation manual. It may cause fires or damage to the devices.
Never disassemble or modify this product, as doing so will void the warranty with Sibata. Doing
so may also result in unforeseen faults and accidents.
If an abnormality occurs during operation of the product, stop the product immediately, and
determine the cause of the abnormality. If it is determined that this product is the cause of the
abnormality, turn the power off, and unplug the power cord from the outlet or take the batteries
out, and contact the distributor where the product was purchased. Never operate the product if
it is not functioning normally. Also, never allow anyone other than a qualified service engineer to
disassemble or modify the product. Doing so could result in an accident or malfunction.
If using an AC power supply, please use the special AC power supply suitable in your area. Do
not branch the wires. This may cause electrocution or fires. If a voltage other than what has
been specified is to be used, please contact the distributor where the product was purchased.
Do not use the product if the power cord is damaged or the outlet is loose. Using damaged
power cords or outlets may cause fires or electrocution.
Do not touch the power cord or outlets with wet hands. It may cause electrocution.
The liquid crystal display of this device is weak to excessive force and pressure. Please do not
apply pressure or force to the liquid crystal display.
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.
Rechargeable battery is installed in this product to back up for the logging data and the clock.
Battery is always charged when the power is on. It is fully charged about 48 hours after
complete discharge and can back up the data and clock for about 1 month. As battery
remaining capacity is not shown, we recommend to charge the battery for back up the data
before or after each measurement. If the product is powered for 8 hours, the data can be stored
in memory for 5 days. Recommendation of replacement of rechargeable battery is once every
two years.

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This product is a measuring device for dust. Regular maintenance may not be enough to
maintain sensitivity when measuring particles that contain water such as mist. When measuring
such particles, request regular maintenance including an overhaul, depending on frequency of
use. Contact the distributor where you purchased the product.
This product has taken some provisions to dustproof and waterproof, so that it may be used in
high concentration environments, but can’t completely guarantee these provisions. Take note of
this while using the product. Please request regular maintenance for the product including an
overhaul, depending on the frequency of usage.
Install this product on a level and stable surface. If it is not placed on a level and stable surface,
it may cause abnormal functions and malfunction of the product.
Do not place or store this product in automobiles parked in the flaming sun, in direct sunlight, in
front of heaters, or near fires. It may cause operational abnormalities or malfunctions.
Do not operate this product when it is covered with cloth, bedding, or wrapped in boxes. The
enclosed heat may cause fires and damage.
Do not place heavy objects and the top of this product. It may deform the main unit of the
product or cause accidents and malfunctions.
Do not operate this product with the air sampling port off. Do not put objects such as nails in the
opening when the air sampling port has been taken off. It may cause malfunctions. If an object
does fall into the opening, turn the power switch off immediately, unplug the power plug and
contact the distributor where you purchased the product.
Do not bend, stretch, or twist the cord. Do not connect it to a different cord. Always unplug the
power cord and output signal line from the outlet. Pulling on the power cord may cause the cord
to become damaged which may cause malfunctions, electrocution and fires.
Do not place any heavy objects on the power cord or step on it. It may cause electrocution or
fires.
Do not turn the power switch off during measurement or communication. It may cause
malfunction.
Unplug the power cord from the outlet when cleaning the product. If it is not unplugged, it may
cause fires or malfunctions.
Do not clean the product in any other methods than what has been indicated in this operation
manual. If the product becomes dirty, wipe away the dirt with a soft cloth (soaked in detergent if
there is significant dirt). Do not wash the main unit by putting it directly in water. It may cause
electrocution, fires or malfunction.
When storing this product, close the air sampling port, and make sure that dust does not get
into the interior of the detector. If large amounts of dust get into the interior of the detector, it
may not measure normally or cause malfunctions.
When not using this product for a long time, store in as cool and dry a location as possible out
of the direct sunlight.
Minute amounts of electricity are consumed even if the power switch is turned off. If the product
is not going to be used, unplug the power cord or take the batteries out. Dry cell batteries
especially may discharge if the product is stored without taking them out. After using the
product, be sure to remove the batteries from the battery case. Leakage of the battery as it
deteriorates may cause injury to the human body or malfunctions to the product.

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2Overview
The LD-5D is a light scattering method relative concentration meter that uses a semiconductor
laser light as a light source to measure dust concentrations in high concentration environments
(Below 100 mg/m3).
2.1 Features
•The LD-5D can easily convert mass concentration of the measured value and display it by
pre-setting a conversion factor for mass concentration.
•Equipped with a recording function (logging function) of the measured value.
●Communication cable with software S-USB is required to retrieve data.
•The calibrated value is stored even after turning the power supply off. An automatic
correction of the measured value of aerosol will be performed by using data of calibrated
value.
•Provides 3 types of standard data output: USB/RS-232C interface output, voltage output (0-
1V) and no-voltage pulse output (open collector).
2.2 Operating Principle
•This product uses the fact that the amount of scattered light is in proportion to mass
concentration when the physical natures of dust particles in the same condition are exposed
to light. Therefore mass concentrations of dust particles floating in the air are measured by
the strength of scattered light.
•The sheath air mechanism is designed for the sampling air to pass through the interior pipes
and the clean air through the exterior pipes so that clean air surrounds the sampling air.

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3Construction
3.1 Description of Parts
Top panel
Left side Front Right side
(5)
(9)
(4)
(2)
(3)
(1)
(8)
(6)
(7)

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Side panel
With the front panel open
Left side Front
(10)
(14)
(15)
(11)
(12)
(13)

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(1) Power switch
This switch is used to turn the power on and off.
When this switch is pressed once, the LD-5D will turn on, a fan will rotate
and the LCD will display the initial screen.
When the switch is pressed again, the LD-5D turns off.
(2) Time setting switch (▼)
This switch is used to set measuring time and to change measuring modes.
Initial value of the measuring time after turning the LD-5D on is 01min.
Thereafter, every time the switch is pressed, it will change as seen below.
Use the up and down cursor to increase or decrease the numerical value.
Measuring time and measuring mode is
displayed here.
0 hours, 0 minutes, 0 seconds
BG (background measurement)
EX MENU (extended menu)
01 min. (1 min.)
02
min. (2 min.)
05
min. (5 min.)
10
min. (10 min.)
MANUAL
LOG (record)
06 SEC. (6 seconds)
10
SEC. (10 seconds)
30 SEC. (30 seconds)
03 min. (3 min.)

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(3) Start/Stop switch ( /■)
This switch is used for starting and stopping the measurement and selection
of an item in the measuring mode.
When this switch is pressed once, the measurement will start.
When this switch is pressed again, the measurement will stop. In modes this
switch functions as a selecting switch and the operator can select the
required item by pressing this switch.
(4) Mass concentration switch (▲)
When this switch is pressed, the LD-5D converts the measured value to
mass concentration value.
When this switch is pressed again, measured value is displayed.
When this switch is pressed during the measurement, a graph is displayed.
When pressed again, normal display (count display) is displayed.
If the backlight function of the liquid crystal display is set up on a timer,
pressing this switch will turn the light on.
Use the up and down cursor to increase or decrease the numerical value.
(5) Graphic liquid crystal display
This is a liquid crystal display for measured value and other items as mentioned below.
●Count value
Will display the count value during measurement and final count value
●Measuring time
Remaining measuring time in the down timer mode and elapsed time of measurement
in manual timer mode is displayed.
●Current time
The current time is indicated at the top of the liquid crystal display.
●Unit
[COUNT] when measuring and [mg/m3] when mass concentration is converted will be
displayed.
●K factor
The K factor currently set is indicated (0.1 - 9.9).
●Set measuring time/Mode
Measuring time in down timer mode and current time in other modes are displayed.
●Battery voltage
The battery voltage is indicated at the bottom of a liquid crystal display. When the battery
voltage has fallen so low that it affects the function of the instrument, the entire liquid
crystal display will flash.
When the voltage of the battery (power source) is approximately 8 V the remaining
battery display will become zero, and the entire liquid crystal display will start to flash.
After this the LD-5D will function only for approximately 30 minutes with alkaline
batteries.
●Mass concentration
Mass concentration will be displayed when the mass concentration switch (▲) is
pressed after down timer mode measurement.
●Graph
The display will switch over and display the graph when the mass concentration switch
(▲) is pressed during measurement.
As the voltage falls, the display will change as shown above.

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(6) Air sampling port
This is the sampling port for the air to be measured.
This air sampling port is structurally built so that air can be sampled from all directions, and
shuts light disturbance out. (sunlight, illuminating lights)
Pull down the cap as shown in the figure below when measuring dust particles.
The side with the socket is where the sheath mechanism has been designed in, be careful
not to apply impact to it or scratch it.
(7) Measurement / Sensitivity adjusting knob
This knob is used to set the standard light scattering plate in the detector which is used for
sensitivity adjustment.
To perform sensitivity adjustment with the standard light scattering plate, turn the knob
clockwise as drawn in the figure below, and push the knob into the main unit.
Reverse the procedures above to turn the knob back to its original position after completing
the sensitivity adjustment.
●To protect the standard light scattering plate from dust particles, make sure that the cap of
the air sampling port is up while adjusting sensitivity.
Before insertion After insertion
Pull down the cap
During measurement for dust
When inserting the knob, turn from
[MEASURE] to [SENSE.ADJ.],
before inserting the knob.

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(8) Battery case cover fixing screw
This is the screw that holds the battery case cover in place.
To remove the cover, turn the screw counterclockwise and start removing the bottom of the
cover first.
To attach the cover, start at the top of the cover and insert the projection into the panel,
adjust, and put the screws in. (The cover will stay in place when the “-” groove is level.)
(9) Battery case cover
This is the cover for the battery case.
(10) Capsule filter
The filter for creating purged air. To remove the filter, turn the cover counter clockwise to
take it off, and remove the 4 screws inside. (→see 8 Precautions for Maintenance, Storage,
and Transport)
(11) External power connecting connector
Operation with AC is possible by connecting a special AC adapter.
(12) Analog output connector
This connector is used for retrieval of the pulse output of the DC 0-1V and open collector of
the recorder. It is connected with the analog pulse cable (optional).
The 0-1V output and pulse output are outputted during measurement.
(13) Digital input output connector
This is a connector used to connect to a personal computer to process data.
It is compatible with an USB (RS-232C). Connect with the included USB cable.
(14) Battery case
Will operate with 8 pcs of size C batteries. (→see 4.2.1)
Minute amounts of electricity are consumed even if the power switch is turned OFF. Take
the batteries out if the LD-5D is not used.
(15) Inspection report
The scattering plate value is recorded.

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3.2 Description of the Modes
Press the time setting switch (▼) to switch between measuring time and mode.
(1) Down timer mode
Set up the measuring time and measure in this mode.
Measurement will automatically end when the measuring time that has been set up has
passed.
●The start/stop switch ( /■) will start measurement.
●If the start/stop switch ( /■) is pressed during measurement, measurement will stop.
(2) MANUAL mode
In this mode measurement can be manually started and stopped.
●Use the start/stop switch ( /■) to start and stop measurement.
(3) LOG (logging) mode
This is the mode to set up recording of measuring data.
●Use the time setting switch (▼) to display [LOG] and every time the start/stop switch
( /■) is pressed, a selection of settings will be displayed.
(4) BG (background) mode
This mode is for performing the 6 second measurement to cancel the background.
●Use the start/stop switch ( /■).
(5) EX_MENU (extended menu)
This is the mode in which multiple setups take place.
●The contents of the item to be setup and selected with the cursor will be displayed.
Press the start/stop switch ( /■) once to change the contents of setup.
●K FACTOR
Input the K factor in this mode.
●AUTO RUN
Setup the ON/OFF function of MANUAL measurement when turning the power on in this
mode.
●RTCSET
This displays the DATE SET and TIME SET menu.
Input the current year/month/day/minute/second in this mode.
●LCD ADJUST
This displays the LCD CONTRAST and LCD BACKLIGHT menu.
Adjust the contrast in the liquid crystal display and setup ON/OFF of the backlight in this
mode.
●RANGE
Setup the range of analog output in this mode.
Select from automatic, x1, and x10.
●I/F
Setup the interface of the serial output in this mode.
Select from RS-232C and USB.

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4Preparation for Measurement
4.1 Inspection of the LD-5D
●Filter
Take a peek at the filter, and if it seems dirty, use a cloth to wipe clean. The filter cover is
made of clear acryl, in order to observe the interior. Before taking measurement, confirm that
the filter cover is completely closed. (→ For more information on maintenance, see 8
Precautions for Maintenance, Storage, and Transport)
●Air Sampling Port
After confirming that the air sampling port is not dirty, insert it all the way in, and close it. Make
sure it is inserted straight.
●USB, RS-232C Connection
To connect the cable, remove the side panel and connect the connector. The screw can be
opened with the jig on the shoulder belt. Screw on and off using this jig. When the groove of
the screw is parallel, the side panel is closed. When the groove of the crew is perpendicular,
the side panel can be removed.
When connected, close the side panel. There are sponges installed on the side panel, which
the cables are held in, and prevent large dust from entering.
●Remove this side panel when inserting the batteries.
4.2 Power ON
4.2.1 When Using Dry Cell Batteries
(1) Remove the battery case cover.
(2) Install 8 pcs of size C dry cell batteries into the battery case.
(3) Place the battery case into the main unit and put the battery case cover back on.
(4) Turn the measurement/sensitivity adjusting knob (see page 11) to the [MEASURE] position.
(5) When the power switch is pressed, a display will come up on the liquid crystal display.
Please use the alkaline dry cell battery to operate the LD-5D.
The manganese battery and the alkaline battery are the 2 types of
1.5V size C dry cell batteries on the market. The manganese battery
may be used, but compared to the alkaline battery, operation time
will be shorter. The manganese dry cell battery included is for the
sole purpose of confirming operation.

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<How to Insert the Dry Cell Batteries >
(1) Turn the battery case cover fixing screws (4
locations) clockwise, and remove the battery
case cover.
Use the jig on the shoulder belt for the screws.
(2) Insert size C alkaline batteries (8 pcs).
(Be careful of the plus, minus direction.)
(3) Use the jig to turn the battery case cover fixing
screws (4 locations) counter clockwise to close
the battery case cover.
4.2.2 When Using an AC Adapter
(1) Connect the AC adapter plug into the connector for external power source on the side
panel of the main unit.
(2) Plug the AC adapter into a commercial power outlet.
(3) When the power switch is pressed, a display will come up on the liquid crystal display.
●Please use the special AC adapter suitable in your area. Otherwise, it will damage the LD-5D.
4.3 Setting Up the Current Time
This instrument has a built in clock function. When down timer measurement (measured data is
not stored.) is used, it is not necessary to set the time. However, when the logging measurement
(measured data is stored.) is used, set the time. If the time is not set, an accurate time can not
be recorded.
Once the current time has been set, it will be stored even after the power has been turned off
and there will be no need to set the current time again.
Jig
The side without the spring is the + (plus).

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(1) Press the time setting switch (▼) to change the lower left display of the liquid crystal
display to time/mode setup [EX_MENU].
(2) When [EX_MENU] is displayed, press the start/stop switch ( /■) to display 1/2 of the setup
menu.
(3) When the time setting switch (▼) is pressed 3 times, 2/2 of the set up menu will be
displayed.
(4) When the start/stop switch ( /■) is pressed, the [RTCSET] menu will be displayed.
(5) Press the start/stop switch ( /■) to change to [DATE SET].

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(6) Use the mass conversion switch (▲) and time setting switch (▼) to increase or decrease
the numerical value being set.
(7) Use the start/stop switch ( /■) to confirm your selection (and move to the next item).
(8) Press the time setting switch (▼) to change to [TIME SET] (Time setting).
Refer to [DATE SET] (date setting) as the procedures for setup are the same.

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(9) To end [RTCSET] use the time setting switch (▼) or the mass concentration switch
(▲) and move the cursor ( ) in front of [QUIT] and press the start/stop switch ( /■).
Furthermore, press the time setting switch (▼) 4 times and press the start/stop switch
( /■).
●The built in battery will back up the clock.
This battery will automatically charge itself when the power of the main unit is turned ON.
Approximately 5 days of back up is possible with 8 hours of charging.
Press the start/stop
switch ( /■) once.
Press the time setting
switch (▼) 4 times.
Press the start/stop
switch ( /■) once.
Each push of the switch increases the set value by 1.
Each push of the switch decreases the set value by 1.
The set values that are underlined may be changed with the following procedures.
PUSH !
PUSH !
(eg.) 00 →01 →02 ……
(eg.) 10 →09 →08 ……
Changing the set values
●If switch is pressed for more than 3 sec. fast forward function kicks in.

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4.4 Measuring the Background (BG)
The background is measured, and will be automatically deducted from the measured value of
dust particles.
Always conduct a background measurement before measuring for dust particles.
(1) Turn the measurement/sensitivity adjusting knob (see page 11) to the [MEASURE] position.
(2) Lift the cap to close the air sampling
port (see figure on right).
Press the power switch to turn on the
LD-5D power.
The BG value cannot be set properly if it is measured with
the air sampling port left open.
Doing so could affect measurement results, such as causing the
instrument to continue displaying a measurement value of zero. If the
BG value has been measured with the air sampling port left open, close
the port and measure the value again.
(3) Leave the LD-5D for 1minute. (This procedure is necessary to fill the detector with purged
air.)
(4) Press the time setting switch (▼) to set the time/mode setup to [BG].
(5) Press the start/stop switch ( /■) to start the background (BG) measurement. It will take 6
seconds to measure BG.
The background measurement has been completed by the procedures above. The LD-5D stores
the measured background value in memory and automatically deducts the background value
from the measured value of dust particles. The background value stored in the memory will not
be deleted by turning the LD-5D off, however, please perform a background measurement prior
to every dust particle measurement.
●Background: This is a false measured value when the detector is filled with purged air.
This value is a surplus for the measurement of the dust particles.
Lift the cap ...
... to close the air
sampling port

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4.5 Automatic Sensitivity Adjustment (SPAN CHECK)
The automatic sensitivity adjustment is performed by measuring the value when the light
scattering plate is inserted, obtaining the difference from the calibrated value and correcting it.
Always perform automatic sensitivity adjustment (SPAN CHECK) before measuring for dust
particles.
(1) Confirm that the power of the main unit is on and lift the cap to close the air sampling port.
(2) Turn the measurement/sensitivity adjusting knob (see page 11) to the [SENSI. ADJ] position.
(3) Confirm that [SPAN CHECK] is indicated in
the upper part of the liquid crystal display and
leave the LD-5D for 1 minute. (This is done to
fill the detector with purged air and to stabilize
the pseudo scattering light caused by the light
scattering plate.)
(4) When the start/stop switch ( /■) is pressed, measurement of the light scattering plate
begins. It will take 1 minute to measure the light scattering plate.
(5) When measurement is complete, turn the measurement/sensitivity adjusting knob to the
[MEASURE] position.
●If the time/mode setup is either [MANUAL], [LOG], or [EX_ MENU] automatic sensitivity
adjustment (SPAN CHECK) is not performed.
Perform in down timer mode or [BG] mode.
The automatic sensitivity adjustment has been performed by the procedures mentioned above.
The LD-5D will compare the measured value of the light scattering plate with the value of the
standard light scattering plate, and automatically calculate the difference between the two and
store it in memory as the corrected value.
After the completion of the automatic adjustment of sensitivity, the sensitivity is corrected with
the calculated value.
Always perform automatic sensitivity adjustment after the background has been
measured.