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.