Riken Keiki RI-2000R User manual

PT3E-0420
NDIR type gas detector
Model RI-2000R
Operating manual

1
Precautions for use
This instrument is a toxic gas alarm and detector. Model RI-2000R 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-2000R 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.

2
Table of contents
1 Outline of model RI-2000R
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
3-2 Maintenance space 9
3-3 Block diagram 10
3-3-1 Electric system 10
3-3-2 Piping system 10
4 Start up 11
4-1 At the beginning 11
4-2 Installation location 11
4-3 Cautions in designing a system 13
4-4 Earthing 16
4-5 Cautions in wiring 16
4-6 Suitable cables 17
4-6-1 Power cable 17
4-6-2 4-20mA signal/contact signal line 17
4-6-3 Terminal block specification 17
4-7 Terminal block diagram 17
4-8 Wiring on the terminal block 18
4-9 Example of wiring cables 18
4-10 Warnings on tubing work 18
5 Operation procedure 20
5-1 Preparation 20
5-2 Basic motion flow chart 20
5-3 Starting 21
5-3-1 Starting the instrument 21
5-3-2 Adjusting the flow rate 22

3
5-4 Operations during measuring mode 23
5-4-1 Display and lamps 23
5-4-2 Output signals 25
5-4-3 Automatic zero adjustment 26
5-5 Maintenance and adjustment 27
5-5-1 Zero point adjustment 27
5-5-2 Alarm test 28
5-5-3 Confirming the alarm set point 29
5-6 Shutting down the instrument 30
6 Alarms 31
6-1 Alarm types 31
6-2 Operations of alarms 31
6-3 Gas alarms 32
6-3-1 Operations 32
6-3-2 Response to gas alarms 33
6-3-3 False gas alarms 33
7 Maintenance 34
7-1 Frequency and items to be checked 34
7-1-1 Daily maintenance 34
7-1-2 Routine maintenance 34
7-1-3 Contract for maintenance 34
7-2 Adjustments 35
7-3 Parts and sensor replacement 35
7-4 Shutting down and removal 35
7-4-1 Shutting down the instrument 35
7-4-2 Removal 35
7-5 Storage 35
7-6 Periodic replacement parts 36
8 Abnormal conditions 37
8-1 Fault signals 37
8-2 Response to trouble signals 38
8-3 Trouble shooting 38
9 Words used in this manual 40
10 Detecting principal 41
11 Specifications 42
11-1 Standard specification 42
11-2 Configuration 44

4
1 Outline of model RI-2000R
1-1 Introduction
The model RI-2000R 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-2000R (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.

5
2 Important information to ensure safety
2-1 Term of “Danger”
DANGER
・Model RI-2000R is not explosion-proof structured. Never use this instrument to detect
gas above the Lower Explosive Level, or in hazardous environment.
Model RI-2000R 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-2000R 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.

6
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-2000R 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-2000R 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-2000R. 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-2000R 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.
③Sample gas inlet A pipe connecting port for sample gas.
④Zero gas inlet A pipe connecting port for zero gas.
⑤Gas outlet A pipe connecting port for the exhaust outlet.
⑥Flow rate adjuster A pipe connecting port for the exhaust outlet.
⑦Power switch A switch to turn the instrument ON or OFF.
⑧Fuse A fuse to protect the power supply system.
rating:AC125V 5A normal fuse
⑨Terminal block A terminal block to connect RI-2000R and external
devices.
* Guide rail is option accessory.
* Guide rail
Installation hole
for M5
A side view

8
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 hen
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.
⑪ESC switch A button used in cancel operation.
11

9
3-2 Maintenance space
Please save space for maintenance people to work safely and correctly when installing
RI-2000R. RI-2000R requires maintenance and space for personnel is needed. Please
remember to make space for personnel at the planning phase and in construction.
＊NOTE
The guide rail which is necessary at the time of rack installation is optional
accessories.
CAUTION
・Make sure that RI-2000R is installed steadily.
It may fall and cause injuries and damage on the instrument if it is not mounted
properly.
Rack installation
Installation

10
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-2000R or not. This instrument
will be damaged and will not operate properly if they are not followed.
4-2 Installation location
Please install RI-2000R 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-2000R 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-2000R 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-2000R
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.

12
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-2000R’s maintenance. A place where you have to dismount a part of
any apparatus to reach RI-2000R. Where things (wiring, storage racks) interfere
opening the case of RI-2000R. 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-2000R 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-2000R if the earthing is not done well.

13
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-2000R.
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-2000R is
started. Please use a backup power supply or take proper measures on the receiving
end.
2. Design considering radiating heat from RI-2000R
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-2000R 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-2000R 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-2000R 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.

15
There may be negative effect to RI-2000R 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-2000Rs 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.
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.
Coil
Loading
SK SK
VV
Power supply Power supply
Surge killer Surge killer
t
Under power relay
RI-2000R
Alarm contact

16
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-2000R. 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-2000R earthed and never let earthing wire to get close to the gas
hose.
・Please earth within 100Ωearth resistance.
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.
Earthing terminal

17
4-6 Suitable cables
CAUTION
・Use junction box if you are using a wire that cannot go through the cable port of
RI-2000R.
4-6-1 Power cable
Please use relevant cables to CVVS 1.25 to 2.0 mm2.
4-6-2 4-20mA signal/ contact signal line
Please use signal lines relevant to CVVS 1.25 to 2.0mm2.
4-6-3 Terminal block specification
【Terminal block specification】
・Power input : 3P
・Each signal output : 8P
・Terminal size : M4
・Tightening torque : 1.2N･m
4-7 Terminal block diagram
CAUTION
・After having wired the terminal block, please attach a cover by all means not to get
shocked.
Power input
AC200/220V “Warning” alarm
out
p
ut contact
“Alarm” alarm
output contact
“Trouble” alarm
out
p
ut contact
4-20mA
Signal output

18
4-8 wiring on the terminal block
(1) Strip off 7mm of the wire coating.
(2) Insert the wire end and tighten the screw.
4-9 Example of wiring cables
・Indicator (e.g. RM-5002)
・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-2000R 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.
(1)About the sample gas inlet
The sample gas inlets connector size is a
PT1/4 female thread. A propylene male connector
is a standard accessory. The piping that matches
is a φ6(0D)-φ4(1D) size Teflon tube.
CAUTION
・Please make sure put on the inner and sleeve
when installing, pay attention to avoid
gas leakage
・The tubes material and length depends on target gas. Please be careful in choosing
material.
RI-2000R

19
(2)About the zero gas inlet
The zero gas inlets connector size is a PT1/4 female thread. A propylene male connector
is a standard accessory. The piping that matches is a φ6(0D)-φ4(1D) size Teflon tube.
Please choose a sampling point where fresh dry air can be drawn in.
CAUTION
・Please make sure put on the inner and sleeve when installing, pay attention to avoid
gas leakage
・Please do not choose a location as sampling point where interference gas may exist.
The zero adjustment will not operate successfully if interferences exist. It will cause
danger because the readings will degrade in case of a gas leak.
・Water in zero gas (fresh air) may cause dew condensation. Please install appropriate
water removal equipment if the air is high humid. Exposure to water will cause
damage and false operation of the instrument.
(3) About the external dust filter
The provided dust filters must be mounted on the sample gas inlet and on the zero
gas inlets.
(4) About the tube material
There might be adsorptive or corrosive gas compounds in the sampled gas. Please be
ware of those gases in choosing the tube/pipe material. Take appropriate measures if
there is water vapour or other gas than the target gas in the sampling gas.