Riken Keiki RI-2000W User manual

PT3E-0410
NDIR type gas detector
Model RI-2000W
Operating manual

1
Precautions for use
This instrument is a toxic gas alarm and detector. Model RI-2000W is a safety device
that is not made for quantitating or qualitative analysis and is not a concentration
analyser.
Please read this manual carefully to become familiar to Model RI-2000W and use the
instrument properly.
1. This instrument may be affected by interference gas or vapour. Please be aware of
errors caused by interferences. Changes in the environment (temperature and
humidity) may cause variation. Please adjust the zero point periodically (about
once a month).
2. Do not use or attach this instrument where temperature changes severely (places
where temperature vary over 10 degrees Celsius).
3. Please have the alarm points adjusted within the instruments performance range.
4. This instrument is a safety equipment and is not a control equipment. The output
for the alarm signal is for the alarm lamp and buzzer, the analogue signal output is
for reading device or external recording device. We do not offer compensation for
other use mentioned above.
5. Contact us if you need to sample gas from a high humid condition, dusty or acid
mist existing environment. Pre-treatment is needed in such case.
6. Periodic maintenance is required including periodic replacement of parts listed in
this manual. Please have the instrument tested and calibrated by gas every 6
months according to law.

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Table of contents
1 Outline of model RI-2000W
4
1-1 Introduction 4
1-2 Purpose of use 4
1-3 Definitions of warnings 4
2 Important information to ensure safety 5
2-1 Term of "Danger" 5
2-2 Terms of "Warning" 5
2-3 Terms of "Caution" 6
3 Functions 7
3-1 Name and function of each part 7
3-1-1 Dimension 7
3-1-2 Display 8
3-1-3 Internal parts 9
3-2 Installation diagram 10
3-3 Block diagram 11
3-3-1 Electric system 11
3-3-2 Piping system 11
4 Start up 12
4-1 At the beginning 12
4-2 Installation location 12
4-3 Cautions in designing a system 14
4-4 Earthing 17
4-5 Cautions in wiring 18
4-6 Suitable cables 18
4-6-1 Power cable 18
4-6-2 4-20mA signal/contact signal line 18
4-6-3 Terminal block specification 18
4-7 Terminal block diagram 19
4-8 Wiring on the terminal block 19
4-9 Example of wiring cables 19
4-10 Warnings on tubing work 19
5 Operation procedure 21
5-1 Preparation 21
5-2 Basic motion flow chart 21
5-3 Starting 22
5-3-1 Starting the instrument 22
5-3-2 Adjusting the flow rate 23

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5-4 Operations during measuring mode 24
5-4-1 Display and lamps 24
5-4-2 Output signals 26
5-4-3 Automatic zero adjustment 27
5-5 Maintenance and adjustment 28
5-5-1 Zero point adjustment 28
5-5-2 Alarm test 29
5-5-3 Confirming the alarm set point 30
5-6 Shutting down the instrument 31
6 Alarms 32
6-1 Alarm types 32
6-2 Operations of alarms 32
6-3 Gas alarms 33
6-3-1 Operations 33
6-3-2 Response to gas alarms 34
6-3-3 False gas alarms 34
7 Routine maintenance 35
7-1 Frequency and items to be checked 35
7-1-1 Daily maintenance 35
7-1-2 Routine maintenance 35
7-1-3 Contract for maintenance 35
7-2 Adjustments 36
7-3 Parts and sensor replacement 36
7-4 Shutting down and removal 36
7-4-1 Shutting down the instrument 36
7-4-2 Removal 36
7-5 Storage 36
7-6 Periodic replacement parts 37
8 Abnormal conditions 38
8-1 Fault signals 38
8-2 Response to trouble signals 39
8-3 Trouble shooting 39
9 Words used in this manual 41
10 Detecting principal 42
11 Specifications 43
11-1 Standard specification 43
11-2 Configuration 45

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1. Outline of model RI-2000W
1-1 Introduction
The model RI-2000W is a NDIR type fixed Nitrogen Dioxide (N2O) gas detector. Please
make sure that the gas monitors model you purchased and the model printed on the
cover of this manual are the same.
This manual describes how to handle model RI-2000W (may be described as “this
instrument” in this manual) and its specifications. Very important terms are written in
this manual so please read this carefully, even if you have experience in gas
monitoring. Keep this manual in an easily viewable location.
1-2 Purpose of use
This instrument is a Nitrogen Dioxide gas monitor that detects gas leakage by
drawing in air by a pump and detects it by a NDIR (Non Dispersive Infrared) based
method. The purpose of this instrument is to detect gas and alarm people when it
detects a gas leak.
1-3 Definitions of warnings
To ensure safety in operating and effective usage, these signals are used in this
manual:
DANGER
This warning means threats to lives or serious damage to human bodies and facilities
are predicted in case of misuse.
WARNING
This signal means serious damage to human bodies or facilities are predicted in case
of misuse.
CAUTION
This signal means that minor damage to human bodies or facilities are predicted in
case of misuse.
＊NOTE
This NOTE will show advice on operating.

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2. Important information to ensure safety
2-1 Term of “Danger”
DANGER
・Model RI-2000W is not explosion-proof structured. Never use this instrument to detect
gas above the Lower Explosive Level, or in hazardous environment.
Model RI-2000W may explode or cause fire if there is presence of flammable gas.
2-2 Terms of “Warning”
WARNING
・Please confirm the power supply voltage is within the rating before setting up this
instrument. Voltage out of the rated range will cause false operation and damage the
instrument.
・Please do not cut or pull off the wire connection to the protective earth inside or
outside the instrument.
・Please check that there are no damage in the protective functions (earthing and
fuses ) before power-on operation. If you find anything suspicious, do not activate
this instrument. It may cause an electrical shock or damage inside.
・Please use a rated (current and voltage) fuse and do not short the fuse holder.
The use of improper fuses and shorts in the fuse holder will cause fire.
・Please turn the power off and stop the power supply of the instrument when replacing
the fuse. If there is electricity supplied, it will cause an electrical shock.
・Never operate this instrument in hazardous environments. (Places where flammable,
explosive gas and vapour exist.) This instrument may explode or cause fire in these
conditions. It is very dangerous to use RI-2000W in such environment.
・Please make sure that the protective earth is steadily installed before connecting the
instrument to external devices. If it is not installed steadily, it may operate incorrectly,
cause electrical shocks and breakdown the instrument.
・It is a dangerous condition when concentrated gas above the alarm set point exists.
Please take appropriate response on your discretion.

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2-3 Terms of “Caution”
CAUTION
・Do not use walkie-talkies near the wiring or by the body of this instrument. The radio
noise may affect the instruments reading. Please use radio wave emitting device
away from RI-2000W where they won’t affect the reading.
・Please wait at least 5 seconds before restarting the instrument. If it is restarted within
5seconds from the instruments shut-down, RI-2000W might not operate properly.
・Please check if the ball in the flow meter is above the red line before using. If the ball
is under the line, please adjust the flow rate.
・Make sure to attach a dust filter on the gas inlet before using RI-2000W. If the filter
isn’t attached properly and dust get’s inside, it will cause false operation and damage
the instrument.
・Please do not use this instruments output for controlling other devices. This
instrument is not a control equipment. We do not accept using RI-2000W as a control
device of any instruments.
・There are parts that generate high temperature inside this instrument. Please do not
touch inside without care. It may cause burns and injuries.

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3. Functions
3-1 Name and function of each part
3-1-1 Dimension
①Flow monitor A window to confirm the flow rate of aspiration.
②Display Displays gas concentration readings and messages.
③Lock A lock to keep the panel door closed.
④Conductive wire port A port to let conductive wire inside the instrument.
⑤Sample gas inlet A pipe connecting port for sample gas.
⑥Zero gas inlet A pipe connecting port for zero gas.
⑦Gas outlet A pipe connecting port for the exhaust outlet.
⑧Flow rate adjuster A finger screw to adjust the flow rate.

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3-1-2 Display
①Liquid crystal display (LCD) Displays gas concentration readings and
messages.
②Power indication lamp A lamp that keeps on when operating normally
after the instrument is turned on. It flashes
when there is any trouble in the instrument.
③Alarm indication lamp A lamp that will flash and indicate during the
2nd gas alarm. It will keep on after the BZ.
STOP button is pressed.
④Warning indication lamp A lamp that will flash and indicate during the
1st gas alarm. It will keep on after the BZ.
STOP button is pressed.
⑤Maintenance indication lamp A lamp that will flash during maintenance
mode.
⑥Zero/▲button A button used in zero, various adjustments
and to ascent numbers.
⑦Test/▼button A button used in the alarm test, various
adjustments and to descent numbers.
⑧Alarm/Set button A button to refer the alarm set point and to
confirm operations.
⑨BZ.STOP button A button to verify alarm conditions. It will stop
the buzzer sound.
⑩Buzzer It will make a sound to alarm people.

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3-1-3 Internal parts
①Power switch A switch to turn the instrument ON or OFF.
②Fuse A fuse to protect the power supply system.
rating: AC 125V 5A normal fuse
③Terminal block A terminal block to connect RI-2000W and external
devices.
④Detector A NDIR type N
2O gas detector (Sensor).
⑤Pump A pump to aspirate gas.
⑥3-way solenoid valve A valve to switch gas (zero gas and sampling gas) to
aspirate.
⑦Flow rate adjuster A screw to adjust flow rate.

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3-2 Installation diagram
Please save space for maintenance people to work safely and correctly when installing
RI-2000W. RI-2000W requires maintenance and space for personnel is needed. Please
remember to make space for personnel at the planning phase and in construction.
Install RI-2000W to a firm wall with M6 bolts upright as the drawing bellow.
CAUTION
・Make sure that RI-2000W is installed steadily on the wall.
It may fall and cause injuries and damage on the instrument if it is not mounted
properly.

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3-3 Block diagram
3-3-1 Electric system
3-3-2 Piping system

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4. Start up
4-1 At the beginning
Please follow all warnings and cautions, stated or implied, in this manual. Read this
operation manual carefully even if you have handled RI-2000W or not. This instrument
will be damaged and will not operate properly if they are not followed.
4-2 Installation location
Please install RI-2000W following the cautions bellow.
CAUTION
・Do not install this instrument outdoors.
This instrument is made for indoor use. It cannot detect gas correctly, in fact the
instrument may breakdown if it is installed outside.
・Please use dust filters to avoid dust being drawn in. This instrument is easily affected
by dust. If you would like to draw gas from a dusty region, please use an additional
MC filter (available accessory) with the standard accessory dust filter.
・Please stop the pump before changing the dust filter. If not, dust will be drawn in and
it will cause false operation or damage the instrument.
・Do not Install this instrument where it will be subjected to direct sunlight and places
where temperature changes suddenly. Please avoid installing this instrument where it
is exposed to direct sunlight, near an air conditioners outlet and windy locations. The
temperature inside RI-2000W will change rapidly and may cause internal
condensation because the instrument cannot follow the change.
・Install this instrument where there are no vibration and impact shocks. This
instrument is precision mechanical equipment that is consisted of delicate optical
devices and electric parts. Please install RI-2000w on a vibration-free stable location.
・Please keep this instrument and it’s cables away from noise sources. Install this
instrument away from high-frequency apparatus. Wire the cables of RI-2000W
parallel to cables of high-frequency apparatus to avoid noise to come in from other
cables or, do not let a noise source to get close to this instrument.
・Do not directly install this instrument where target (sample) gas pools. Sample gas
with a sampling hose and make it drawn into the instrument.

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CAUTION
・Please make a space wide enough for personnel to maintenance this instrument safely.
Do not install this instrument where danger is predicted (example: near a high tension
line). Periodical maintenance is needed.
・Please install this instrument where maintenance can be done. These places are NOT
suitable installation locations: Inside big equipment and you have to shut down the
apparatus for RI-2000W’s maintenance. A place where you have to dismount a part of
any apparatus to reach RI-2000W. Where things (wiring, storage racks) interfere
opening the case of RI-2000W. Periodical maintenance is needed so please save
enough space and passage way.
・Do not attach this instrument to any apparatus chassis that has not sufficient earthing.
It may case false operation, electrical shocks and damage in RI-2000W if the earthing
is not done well.
・In case of installing this instrument on a apparatus, please have the earthing work
done correctly. It may case false operation, electrical shocks and damage in
RI-2000W if the earthing is not done well.

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4-3 Cautions in designing a system
CAUTION
・Please design your system reflected to the statements in this paragraph. Unstable
power source and noise will cause false operation and false alarms of RI-2000W.
1. Use a stable power supply
False operations of the alarm contacts and output contacts may be expected when
instantaneous blackouts occur and for a while the system is unstable after RI-2000W
is started. Please use a backup power supply or take proper measures on the receiving
end.
2. Design considering radiating heat from RI-2000W
There is a ventilation fan on the top of the instrument. Please keep this part clear and
do not block it with anything. If you are installing RI-2000W inside a closed
instrumentation panel, please put on 2 fans on the top and the bottom to ventilate.
power supply
voltage AC 200V/ AC 220V（in terminal voltage）
Permissible time
of instantaneous
blackouts
Less than 10ms
（RI-2000W will restart if the blackout exceeds 10ms）
Please use an external uninterruptible power supply
to ensure continuous work.
Others
Please do not share power supplies with high power
loads and high frequency noise sources.
Use line filters and separate this instrument from
noise sources if needed.

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3. Lightning Surge Suppression
4. Alarm contacts
The alarm contacts of this instrument are intended for transferring signals to alarm
buzzers and alarm beacons. Please do not use RI-2000W for controlling systems
(example: to control isolation valves).
CAUTION
・The de-energized break contact (b contact) may be instantaneously opened when an
exogenous shock is applied.
・Please take measurements against the instantaneous operations that happen when
using the b contact as an alarm contact (optional). Example: make a 1 second delay
in the receiving side of the b contact.
What is lightning surge?
There are problems related to lightning inside factories and
plants in these cases: When the wiring is done outdoors, and
when outdoor cables are lead inside and wired along side of
indoor cables. If lightning is a huge electrical source, the
cables are an antenna. Then instruments connected to the
cables may be damaged due to high electricity. We cannot
prevent growth of thunder clouds and strikes of lightning.
You cannot avoid lightning surge completely by burying
cables underground or laying cables inside a metal tube.
Lightning Surge
Suppression
There are no complete ways to avoid damage from
lightning but there are measures that can be taken. Please
take appropriate measures according to the environment
and the level of importance of your facilities.
1. Use fibre optics to send signals.
2. Use lightning arresters. In case lightning surge comes in a
cable, the lightning arrester will protect central processor
and instruments. For information about lightning arresters,
please contact manufacturers.
Protective earthing Surge noise does not only come from lightning. Please earth
instruments to protect them from electrical noise.

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There may be negative effect to RI-2000W when the loading is controlled because of
loading characteristics. Please take the measures below to stabilise operation and to
protect the contacts in such case.
Please attach a surge absorber (a CR circuit, a spark killer or a diode if it is a DC relay)
within the rating of on the relay coil with a under voltage relay directly.
＊NOTE
There are cases which putting CR circuits on the contact’s side are better. That depends
on the loads condition, but you must confirm how the loading behaves before doing it.
Please put CR circuits on the loading side of the relay as needed.
-The concept of inductive load on the alarm contact-
The stated specifications of RI-2000Ws alarm contact is based on the condition on
resistance load. The failures below are prone to happen because of the occurrence of
high electromotive force when inductive loads are connected.
・Lose relay functions due to welding on the relay.
・Any electric component may be broken if high voltage comes into the detector.
・Abnormal operation because of CPU runaway caused by huge noise.
There are other unpredictable noise penetrations into the relay other than inductive
load and the failures written above may happen.
Coil
Loading
SK SK
VV
Power supply Power supply
Surge killer Surge killer
RI-2000W
Alarm contact
Under power relay

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CAUTION
・In principle, please do not connect inductive loads. Never use fluorescent lights or
motors.
・Please connect external amplifiers if you have to use inductive loads.
4-4 Earthing
Please connect the internal or external port to your earthing port. (less than 100
Ω,300V)
WARNING
・Please check the earthing and fuse before operating RI-2000W. If there are faults
suspected, please do not start the instrument. If not, it may cause damage or
electrical shocks.
・Make sure to have RI-2000W earthed and never let earthing wire to get close to the
gas hose.
・Please earth within 100Ωearth resistance.

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4-5 Cautions in wiring
CAUTION
・Please make sure not to cause damage in the electronic circuits inside, during power
distribution work.
・Please handle the detector unit carefully. There is a risk of fall if you let the instrument
stand on the floor and cause damage on the instrument.
・Do not lay down the power cable and signal cable with other power sources (e.g.
Motor) cables.
・Make sure not to let the cable cores touch together if you are using twisted wire.
4-6 Suitable cables
CAUTION
・Use junction box if you are using a wire that cannot go through the cable port of
RI-2000W.
4-6-1 Power cable
Please use relevant cables to CVVS 1.25 to 2.0 sq.
4-6-2 4-20mA signal/ contact signal line
Please use signal lines relevant to CVVS 1.25 to 2.0sq.
4-6-3 Terminal block specification
Condition
３ｐ terminal block（power）
８ｐ terminal block（signal）
Length of stripped wire approximately 7.0 mm approximately 7.0 mm
Tightening torque 0.5 - 0.6 N・m 0.5 - 0.6 N・m
Suitable screwdriver flathead screwdriver（less than 3mm width）
Suitable ferrules
If you would like to use, the equipments below are suitable.
zFerrules: Ai series of
zCrimp tool: CRIMPFOX UD 6 of Phoenix Contact GmbH & Co. KG
CAUTION
・Be sure to use the ferrules stated in this manual.

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4-7 Terminal block diagram
4-8 wiring on the terminal block
(1) Strip off 7mm of the wire coating.
(2) Insert the wire end and tighten
the screw.
Please refer to 04-6-3.
4-9 Example of wiring cables
・Indicator (e.g. RM-582)
・upper level (DCS,PLC)
4-10 Warnings on tubing work
WARNING
・This instrument is made to sample gas under atmospheric pressure condition. It is
dangerous to apply excessive pressure to the gas inlets (GAS IN and GAS OUT)
because the tube may tare loose from the instrument and leak hazardous gas. Please
use RI-2000W in normal pressure.
・Please connect an exhaust tube on the gas outlet that is on the bottom side of the
instrument, and exhaust the sampled gas in a place that is known to be safe.
Power input
AC200/220V
“Warning” alarm
output contact
“Alarm” alarm
output contact
“Trouble” alarm
output contact
4-20mA
signal output
①
②