Riken Keiki RP-3R User manual

PT0E-1666
Gas Suction Pump Unit
RP-3R/RP-3R (Pro)
RP-3R (S)/RP-3R (Pro/S)
Operating Manual
(PT0E-166)
2-7-6 Azusawa, Itabashi-ku, Tokyo, 174-8744, Japan
Website: https://www.rikenkeiki.co.jp/

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Contents
1. Product Overview
1-1. Introduction .....................................................................................3
1-2. Intended use ...................................................................................4
1-3. DANGER, WARNING, CAUTION, and NOTE.................................4
1-4. Checking standards and explosion-proof specifications .................4
2. Important Safety Information
2-1. Danger items...................................................................................5
2-2. Warnings .........................................................................................5
2-3. Precautions .....................................................................................7
2-4. Safety information ...........................................................................8
3. Product Configuration
3-1. Main unit and standard accessories.............................................. 11
3-2. Part names and functions.............................................................. 11
3-2-1. RP-3R or RP-3R (Pro)................................................................... 11
3-2-2. RP-3R (S) or RP-3R (Pro/S) .........................................................13
4. Usage Procedures
4-1. Usage note....................................................................................15
4-2. Preparations for startup.................................................................15
4-3. Battery insertion and replacement.................................................15
4-4. Attaching the GX-3R or GX-3R Pro...............................................17
4-4-1. RP-3R or RP-3R (Pro)...................................................................17
4-4-2. RP-3R (S) or RP-3R (Pro/S) .........................................................19
4-5. Removing the GX-3R or GX-3R Pro .............................................21
4-5-1. RP-3R or RP-3R (Pro)...................................................................21
4-5-2. RP-3R (S) or RP-3R (Pro/S) .........................................................21
4-6. Startup and shutdown procedures ................................................22
4-7. Switching pump suction flow rates ................................................22
4-8. Fault alarms ..................................................................................23
5. Maintenance
5-1. Maintenance intervals and items...................................................24
5-2. Cleaning procedure.......................................................................25
5-3. Filter replacement..........................................................................25
5-4. Periodic replacement parts list ......................................................26
6. Storage and Disposal
6-1. Procedures for storage or when not in use for extended periods ...27
6-2. Procedure for reuse.......................................................................27
6-3. Product disposal............................................................................27
7. Troubleshooting.............................................................................29
8. Product Specifications...................................................................30

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1
1.Product Overview
1-1. Introduction
Thank you for purchasing the RP-3R/RP-3R (Pro)/RP-3R (S)/RP-3R (Pro/S)
Gas Suction Pump Unit (“product” hereinafter). Please confirm that the model
number of the product you purchased matches the model number of the
product covered by this manual.
The product should be used only by fully-trained personnel.
The maintenance procedures described in this manual should be performed
only by fully-trained personnel. Any maintenance procedure not described in
this manual must be performed by Riken Keiki or our certified service
engineers. Please contact Riken Keiki.
This manual describes how to use the product and provides product
specifications. Make sure you have read and fully understood the contents of
this manual before using the product. This applies both to first-time users and
those who have previously used the product.
Keep this manual in a safe place for future reference.
The contents of this manual are subject to change without notice to allow
product improvements. Any duplication or reproduction of this manual without
permission is prohibited, whether in whole or in part.
The product is designed to be used by being attached to the GX-3R/GX-3R
Pro Portable Gas Monitor (available separately). Refer to the following
manuals for the separately sold products along with this manual:
1) GX-3R Portable Gas Monitor Operating Manual (PT0E-176)
2) GX-3R Pro Portable Gas Monitor Operating Manual (PT0E-177)
Regardless of the warranty period, Riken Keiki does not accept any liability for
accidents or damage resulting from use of the product.
Be sure to read the warranty policy set forth on the warranty.

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1-2. Intended use
The product is designed to be attached to the GX-3R/GX-3R Pro Portable
Gas Monitor (available separately) to draw in gas using the built-in pump.
The RP-3R and RP-3R (S) can be connected to the GX-3R. The RP-3R (Pro)
and RP-3R (Pro/S) can be connected to the GX-3R Pro.
1-3. DANGER, WARNING, CAUTION, and NOTE
This manual uses the following headings to ensure safe and effective work:
DANGER
This indicates situations in which improper handling may
result in fatal or serious injury to persons or serious
dama
g
e to propert
y
.
WARNING
This indicates situations in which improper handling may
result in serious injury to persons or serious damage to
propert
y
.
CAUTION
This indicates situations in which improper handling may
result in minor injury to persons or minor damage to
propert
y
.
NOTE This indicates handling tips.
1-4. Checking standards and explosion-proof
specifications
The product specifications will vary depending on the specific standards and
explosion-proof certification. Check actual product specifications before use.
For CE marking models, please refer to the “Declaration of Conformity”
provided at the end of this manual.
Check the nameplates affixed as shown in the following figures for product
specifications.
Nameplate for explosion-proof electrical
equipment type certified (Japanese
explosion-proof specifications) product
Nameplate for ATEX/IECEx
specifications
Type examination
certificate marking Ex marking/
CE marking

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2
2. Important Safety
Information
2-1. Danger items
2-2. Warnings
WARNING
If an abnormality occurs
If an abnormality is discovered in the product, contact Riken Keiki
immediately.
Visit our website for information on the nearest Riken Keiki office.
Website: https://www.rikenkeiki.co.jp/
DANGER
Explosion-proof
• Do not modify or alter circuits or the configuration.
• When carrying the product to use in potentially hazardous locations,
follow the following general safety precautions to prevent hazards due to
static electricity buildups:
①Wear antistatic work clothing and conductive footwear (antistatic work
shoes).
②For use indoors, make sure the space has a conductive floor (leakage
resistance not exceeding 10 MΩ).
• The product is rated as follows:
Power supply: 1.5 V DC
RP-3 RP-3R (Pro)
RP-3R (S) RP-3R (Pro/S)

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WARNING
Usage
• When measuring inside manholes or enclosed locations, never lean over
the manhole entrance or attempt to peer inside. There is a danger that
oxygen-deficient air or other gases may be discharged from such
locations.
• Oxygen-deficient air may be discharged from the gas outlet. Never
breathe in this air. High-concentration (LEL or higher) gas may be
discharged. Be sure to maintain a safe distance from flame sources.
Battery level check
• The battery may become depleted if not used for a long period of time.
Always replace with a new battery before use.
• If a low battery voltage alarm is issued during use, turn off the power and
move immediately to a nonhazardous location to replace the battery.
Miscellaneous
• Do not dispose of the product into fire. Do not attempt to wash the
product, either in a washing machine or an ultrasonic cleaning machine.
• Do not block the buzzer opening. Doing so will muffle or silence the
audible warning.
• The product is designed to draw in gas at atmospheric pressure. There is
a danger that detection target gas may leak from inside the product if an
excessive pressure is applied to the gas inlet of the product. Be careful to
avoid excessive pressure during use.
• Do not connect directly to locations pressurized above atmospheric
pressure. Doing so may result in damage to the internal pipes.

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2-3. Precautions
CAUTION
• Avoid use in locations where the product may be splashed with oil or
chemicals. Avoid deliberate immersion in water.
• Avoid using the product in locations where the product may be splashed
with oil, chemicals, or other liquids.
• Take care to keep water such as rainwater from entering via the suction
part.
• Do not place the product in locations where water or mud may
accumulate. Placing the product in such locations may result in water or
mud entering via the buzzer opening or gas connector, resulting in
malfunctions.
• Avoid use in locations where temperatures are below -20°C or exceed
50°C.
• The operating temperature range for the product is between -20°C and
+50°C. Avoid use under conditions beyond the operating range.
• Avoid using the product for extended periods in locations exposed to
direct sunlight.
• Avoid storing the product inside parked vehicles in hot weather.
• Do not use walkie-talkies or other radio transmitters near the product.
• The product’s functions may be affected by radio waves emitted from
walkie-talkies or other radio transmitters used nearby. Do not use walkie-
talkies or other radio transmitters close to the product.
• Avoid using the product close to devices that emit strong electromagnetic
waves (e.g., high frequency or high voltage devices).
• Be sure to perform regular maintenance.
• The product is a safety device and must be regularly maintained to
ensure safety. Continuing to use the product without regular maintenance
may prevent accurate gas detection.
• Pressing buttons unnecessarily may change the settings, preventing
alarms from activating correctly. Operate the gas monitor using only the
procedures described in this operating manual.

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2-4. Safety information
Observe the following points to ensure performance as an explosion-proof
product:
Product overview
• The RP-3R series (RP-3R, RP-3R (Pro), RP-3R (S), and RP-3R (Pro/S))
pump units are suction pumps that draw in and feed gas to the GX-3R or
GX-3R Pro. Although the GX-3R and GX-3R Pro are diffusion type gas
monitors, they can be used as suction type monitors when connected to
the RP-3R/RP-3R (Pro)/RP-3R (S)/RP-3R (Pro/S).
• The user should not attempt to replace the chamber unit.
• The built-in micropump is used to draw in gas.
• Only AA alkaline batteries (LR6) manufactured by Toshiba can be used with
the product.
<ATEX/IECEx specifications>
Explosion-
proof
construction
Intrinsically safe explosion-proof construction
Explosion-
proof class
• Ex ia IIC T4 Ga
-20°C ≤Ta ≤+50°C (using L6 battery)
Ex ia IIC T4/T3 Ga
-20°C ≤Ta ≤+40°C/+50°C (using MN1500 battery)
•
Electrical
specifications
Alkaline battery: Toshiba LR6 or Duracell MN1500
Certificate
numbers
• IECEx: IECEx PRE 17.0070
• ATEX: Presafe 17 ATEX 11584
Applicable
standards
• IEC 60079-0:2017 • EN IEC 60079-0:2018
• IEC 60079- 11:2011 • EN60079-11:2012
WARNING
• Do not disassemble or modify the product.
• Do not replace the dry battery in a hazardous area.
• Use only a Toshiba AA alkaline battery (LR6) or Duracell AA alkaline
battery (MN1500).
II 1 G Ex ia IIC T4 Ga
-20°C ≤Ta ≤+50°C (using L6 battery)
II 1 G Ex ia IIC T4/T3 Ga
-20°C ≤Ta ≤+40°C/+50°C (using MN1500 battery)

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Product code
INST. No. 00 0 0 0 0 0 0 0 0 0 0
A B C D E
A: Year of manufacture (0 to 9)
B: Month of manufacture (1 to 9 for January to September, X for
October, Y for November, Z for December)
C: Manufacturing lot
D: Serial number
E: Factory code
<Japanese explosion-proof specifications>
Explosion-proof
construction
Intrinsically safe explosion-proof construction
Explosion-proof class Ex ia IIC T4 Ga
Ambient temperature -20°C to +50°C
Rating Power supply: 1.5 V DC (Toshiba LR6 battery ×1)
Certificate number
RP-3R
RP-3R(Pro)
RP-3R(S)
RP-3R(Pro/S)
：DEK18.0040
：DEK18.0041
：DEK20.0030
：DEK20.0031
Applicable standards JNIOSH-TR-46-1: 2015
JNIOSH-TR-46-6: 2015
Enclosure protection
class
IP20
Protection against human access: finger
Protection against hazardous water ingress: no
protection

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WARNING
• Check to confirm that the product model indicated on the nameplate is
correct. The nameplate also includes the following information:
Product model: RP-3R/RP-3R (Pro)/RP-3R (S)/RP-3R (Pro/S)
Manufacturer: Riken Keiki Co., Ltd.
Explosion-proof class: Ex ia IIC T4 Ga
Ambient temperature: -20°C to +50°C
Battery type: Toshiba LR6
Warning: Do not remove the battery in hazardous locations.
• To ensure required explosion-proof performance, the RP-3R and RP-3R
(S) must be connected to the explosion-proof electrical equipment type
certified GX-3R. The RP-3R (Pro) and RP-3R (Pro/S) must be
connected to the explosion-proof electrical equipment type certified
GX-3R Pro.
2-7-6 Azusawa, Itabashi-ku, Tokyo, 174-8744, Japan
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
Website: https://www.rikenkeiki.co.jp

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3
3. Product Configuration
3-1. Main unit and standard accessories
Open the box and packaging and inspect the product and accessories.
If anything is missing, contact Riken Keiki.
Main unit
Standard accessories
AA alkaline battery (Toshiba LR6): ×1
Tapered nozzle: ×1
3-2. Part names and functions
3-2-1. RP-3R or RP-3R (Pro)
* This illustration depicts the RP-3R (Pro).
⑥Filter case
⑦Gas inlet
④Battery cap
⑩Locking lever
⑧Attachment/removal
leve
r
①Power/reset switch
⑤Buzzer opening ③Power lamp
②Flow rate lamp
⑨Retaining hook
RP-3R RP-3R (Pro) RP-3R (S) RP-3R (Pro/S)
Front view

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Top view Rear view
①
Power/reset
switch
(POWER/RESET)
Turns the power on and off.
Used to reset the low flow rate alarm
②Flow rate lamp
(FLOW)
Steady illumination (yellow) in High mode
Flashing (yellow) in Low mode
Flashing rapidly (yellow) when a low flow rate
alarm is issued
③Power lamp
(POWER)
Steady illumination (green) when the power is on
Flashing (green) when the battery level is low
④Battery cap Cap for the battery compartment
⑤Buzzer opening Opening from which the buzzer sounds
⑥Filter case Contains filters. Remove to replace the filters.
Open only to replace the filters.
⑦Gas inlet Gas inlet
⑧Attachment/
removal lever
Used to attach or remove the GX-3R or GX-3R
Pro to or from the product
⑨Retaining hook Used to attach or remove the GX-3R or GX-3R
Pro to or from the product
⑩Locking lever Used to secure the GX-3R or GX-3R Pro to the
product
⑪Sensor adapter Used to connect the GX-3R or GX-3R Pro sensor
unit
⑫Gas outlet Gas outlet
⑪Sensor adapter
CAUTION
• Avoid prodding the buzzer opening with sharp objects. Doing so may
result in damage or failure.
• Do not remove the panel sheet from the indication panel.
⑫Gas outlet

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3-2-2. RP-3R (S) or RP-3R (Pro/S)
* This illustration depicts the RP-3R (Pro/S).
Front view
Top view Rear view
①
Power/reset
switch
(POWER/RESET)
Turns the power on and off.
Used to reset the low flow rate alarm
②Flow rate lamp
(FLOW)
Steady illumination (yellow) in High mode
Flashing (yellow) in Low mode
Flashing rapidly (yellow) when a low flow rate
alarm is issued
③Power lamp
(POWER)
Steady illumination (green) when the power is on
Flashing (green) when the battery level is low
④Battery cap Cap for the battery compartment
⑤Buzzer opening Opening from which the buzzer sounds
⑥Filter case Contains filters. Remove to replace the filters.
Open only to replace the filters.
⑦Gas inlet Gas inlet
⑥Filter case
⑦Gas inlet
④Battery cap
⑧Attachment/removal
lever
①Power/reset switch
⑤Buzzer opening ③Power lamp
②Flow rate lamp
⑨Retaining hook
⑩Sensor adapter
⑪Gas outlet

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⑧Attachment/
removal lever
Used to attach or remove the GX-3R or GX-3R
Pro to or from the product
⑨Retaining hook Used to attach or remove the GX-3R or GX-3R
Pro to or from the product
⑩Sensor adapter Used to connect the GX-3R or GX-3R Pro sensor
unit
⑪Gas outlet Gas outlet
CAUTION
• Avoid prodding the buzzer opening with sharp objects. Doing so may
result in damage or failure.
• Do not remove the panel sheet from the indication panel.

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4
4.Usage Procedures
4-1. Usage note
The operating precautions apply to both users who have previously used the
product and first-time users. Failure to observe these precautions may result
in failure of the product and/or inability to detect gas correctly.
4-2. Preparations for startup
Observe the following precautions before starting gas detection. Otherwise,
the product cannot be used correctly.
• Check to confirm that the battery level is sufficient.
• Check to confirm that the filters are not dirty.
• Cover the gas inlet with the product power turned on. Confirm that a low
flow rate alarm occurs within five seconds. If no alarm occurs, check to
confirm that the product is attached correctly to the GX-3R or GX-3R Pro.
• Attach the tapered nozzle to the gas inlet of the product.
4-3. Battery insertion and replacement
When using the product for the first time or if the battery level is low, insert a
new AA alkaline battery.
CAUTION
Battery replacement
• Always turn off the power for the product before replacing the battery.
• Replace the battery only in nonhazardous locations.
• Always replace with a new battery.
• Note the polarity when inserting a new battery.
• The battery may fall out if the battery cap is not properly secured
(tightened).
Battery
• Do not use rechargeable batteries.

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①Push the battery cap in and rotate to the position indicated in the following
diagram to remove.
②Insert a new battery. Note the polarity.
③Push the battery cap in and rotate to the position indicated in the following
diagram.
CAUTION
• Use the following battery types:
<Japanese explosion-proof specifications>
To ensure explosion-proof performance, use an AA alkaline battery
(Toshiba LR6) indicated on the certificate of conformity for electrical
equipment used in potentially explosive atmospheres.
<ATEX/IECEx specifications>
Use only a Toshiba AA alkaline battery (LR6) or Duracell AA alkaline
battery (MN1500).
Insert from
positive end.

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4-4. Attaching the GX-3R or GX-3R Pro
4-4-1. RP-3R or RP-3R (Pro)
Attach the GX-3R or GX-3R Pro for the RP-3R or RP-3R (Pro) as described
here. The illustration in the procedure here depicts the RP-3R (Pro).
NOTE
Check to confirm beforehand that the locations where the product makes
contact with the GX-3R or GX-3R Pro (e.g., grooves and clips) are free of
dirt, foreign material, and scratches. Also check to confirm that the
rubber seal on the product is not distorted. The product may not be able
to be used correctly if the rubber seal is distorted. Contact Riken Keiki to
request replacement of the rubber seal.
Top view of product Underside of GX-3R/GX-3R Pro
(The illustration above depicts the GX-3R Pro.)
①Push down the locking lever.
②Attach the GX-3R or GX-3R Pro to the product.
Locking lever
First, engage the
retaining hook on
the product with
the groove on the
front right of the
GX-3R or GX-3R
Pro.
Next, push the
attachment/
removal lever
on the product
into the groove
on the opposite
side.
Push in so no
gap remains.
Retaining hook
A
ttachment/removal lever
Rubber seal

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NOTE
Make sure the GX-3R/GX-3R Pro does not scrape against the rubber
seal on the product during attachment.
③Check to confirm that the locking lever lifts up and the attachment/
removal lever and retaining hook are secure.
Attach
without
scraping
product
rubber seal.
Product
rubber seal
scraped
Correct attachment method Incorrect attachment method

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4-4-2. RP-3R (S) or RP-3R (Pro/S)
Attach the GX-3R or GX-3R Pro for the RP-3R (S) or RP-3R (Pro/S) as
described here. The illustration in the procedure here depicts the RP-3R
(Pro/S).
NOTE
Check to confirm beforehand that the locations where the product makes
contact with the GX-3R or GX-3R Pro (e.g., grooves and clips) are free of
dirt, foreign material, and scratches. Also check to confirm that the
rubber seal on the product is not distorted. The product may not be able
to be used correctly if the rubber seal is distorted. Contact Riken Keiki to
request replacement of the rubber seal.
①Press the part marked “PUSH” on the attachment/removal lever on the
side of the product.
②While pressing the attachment/removal lever, attach the GX-3R or GX-3R
Pro from directly above the product.
Rubber seal
Top view of product Underside of GX-3R/GX-3R Pro
(The illustration above depicts the GX-3R Pro.)
A
ttachment
/
removal lever
Push in so
no gap
remains.
A
ttach
from
directly
above.

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NOTE
Make sure the GX-3R/GX-3R Pro does not scrape against the rubber
seal on the product during attachment.
③Check to confirm that the attachment/removal lever and retaining hook
are secure.
A
ttach
without
scraping
product
rubber
seal.
Product
rubber
seal
scraped
Correct attachment method Incorrect attachment method