PT9E-01213

Fixed type Explosion-Proof Pump Unit

RP-D58・AC
RP-D58・DC
Operating Manual<Contents>

1. Outline of the Product........................................................................................................... 1
1-1. Preface ............................................................................................................................ 1
1-2. Purpose of use ................................................................................................................ 1
1-3. Definition of DANGER, WARNING, CAUTION, and NOTE ............................................. 2
1-4. Method of confirmation for Standards and Explosion proof specification ........................ 2
2. Important Notices on Safety ................................................................................................. 3
2-1. Danger cases .................................................................................................................. 3
2-2. Warning cases ................................................................................................................. 4
2-3. Precautions ..................................................................................................................... 5
2-4. Safety Information ........................................................................................................... 6
3. Product Components ............................................................................................................ 10
3-1. Main unit and standard accessories ................................................................................ 10
3-2. Names and functions for each part.................................................................................. 12
3-3. Block diagram.................................................................................................................. 15
4. How to Use ........................................................................................................................... 17
4-1. Before using the pump unit.............................................................................................. 17
4-2. Precautions for installation points .................................................................................... 17
4-3. Precautions for system designing.................................................................................... 18
4-4. How to install ................................................................................................................... 20
4-5. How to wire...................................................................................................................... 22
4-6. How to tube ..................................................................................................................... 29
5. How to Operate .................................................................................................................... 30
5-1. Preparation for start-up ................................................................................................... 30
5-2. Basic operating procedures ............................................................................................. 30
5-3. How to start the pump unit .............................................................................................. 31
5-4. How to exit....................................................................................................................... 32
6. Alarm Activation .................................................................................................................... 33
7. Maintenance ......................................................................................................................... 34
7-1. Maintenance intervals and items ..................................................................................... 34
7-2. Parts replacement ........................................................................................................... 40
8. Storage, Relocation and Disposal ........................................................................................ 41
8-1. Procedures to store the pump unit or leave it for a long time .......................................... 41
8-2. Procedures to relocate the pump unit or use it again ...................................................... 41
8-3. Disposal of products ........................................................................................................ 41
9. Troubleshooting .................................................................................................................... 42
10. Product Specifications ........................................................................................................ 43
10-1. List of specifications ...................................................................................................... 43
10-2. Detection principle ......................................................................................................... 48

RP-D58 Series1 Outline of the Product1-1. Preface

1

Outline of the Product1-1. Preface
Thank you for choosing our fixed-type explosion-proof pump unit RP-D58 series. Please check that themodel number of the product you purchased is included in the specifications on this manual.
This manual explains how to use the pump unit and its specifications. It contains information required forusing the pump unit properly. Not only the first-time users but also the users who have already used the
product must read and understand the operating manual to enhance the knowledge and experience before
using the pump unit.

1-2. Purpose of use
 This pump unit is a suction pump unit for attracting the gas revealed into the atmosphere and sending
into a gas detector head.
 This pump unit is used combining the indicator/alarm unit and the gas detector head if needed.
The pump unit can be used by itself, in order to function gas detector and gas detector head and low
flow rate alarm, please use it pairing a directions alarm part. Read also the operating manual of theindicator/alarm unit.
 Please fully understand the features of the detector head before using it, so that it can be used properly.
 The pump unit draws abnormalities in the air caused by presence of gases or other reasons (leak) withthe built-in pump.
 The pump unit has a built-in low flow rate detection function and can trigger a fault alarm when the flowrate inside the tubing drops below a fixed rate.
 The pump unit has two types of power supply specifications.
RP-D58·AC
RP-D58·DC

RP-D58 Series

AC power specification
DC power specification

100 - 110 VAC
24 VDC-1-2 Important Notices on Safety

2-4. Safety Information

2-4. Safety Information
Necessary information for explosion proof construction of Model RP-D58・AC／RP-D58・DC.
This product is an explosion-proof pump which is basically installing fixed place.
There is one point of contact and works by trouble.
<ATEX/UKEX Specifications>Technical Data
(Protection Method)(Certificate numbers)(Group)(Category)(Type of Protection and Marking code)(Equipment Protection Level)(Ambient Temperature)(Electrical Data)
Supply voltage :Relay : Contact output
Sensor power supply : Flow sensor(Applicable Standard)

Flameproof enclosure “d”
DNV 21 ATEX 63457X
DNV 22 UKEX 25926X
II
2G
Ex db h ⅡB+H2 T4
Gb-20C to +53C
24 Vdc(Typ.)
DC30V or AC250V 0.5A
DC2.0V 170mA
EN IEC 60079-0 : 2018，EN 60079-1: 2014
BS EN IEC60079-0:2018, BS EN 60079-1:2014

Specific conditions of “X”-mark:Fasteners used for enclosure arefrom stainless steel property class A2-70.
Cable gland may not provide sufficient clamping. User shall provide additional clamping of the cable toensure that pulling and twisting isnot transmitted to the terminations.
Regarding ATEX specification, the measuring function according to Annex II paragraph 1.5.5 of the
Directive is not covered by this EU-type examination.
It shall comply with the requirements from the relevant European harmonized standards which provide
guidance on the performance of gas detection equipment and safety devices.
The measuring function according to schedule 1, paragraph 24 of the Regulation is not covered in thisUK-type examination. It shall comply with the requirements from the relevant UK Designated Standards
which provide guidance on the performance of gas detection equipment.
The flameproof joints not intended to be repaired.
Enclosure made of Aluminum – Avoid impact or Friction in the equipment.

RP-D58 Series-6-4 How to Use

4-3. Precautions for system designing

Introducing protective measures against lightning
If cables are installed outside the factory/plant, or if internal cables are installed in the same duct as thecables coming from outside the factory/plant, "lightning" will cause problems. Because lightning acts as alarge emission source while cables act as a receiving antenna, devices connected to the cables may bedamaged.
Lightning cannot be prevented. Cables installed in a metal conduit or under the ground cannot becompletely protected from inductive lightning surge caused by lightning. Although complete elimination ofdisasters caused by lightning is impossible, the following protective measures can be taken.
Take appropriate measures in accordance with the importance of the facilities andthe environment.
 Provide protection by a lightning arrester (cable arrester).
Protection against(Although inductive lightning surge can be transmitted through the cable, it islightning
prevented by installing a lightning arrester before the field devices and central
processing equipment. For information on how to use a lightning arrester,
please contact the manufacturer.）
In addition to lightning, there are more sources of surge noise. To protect units from
Groundingthese noise sources, the units must be grounded.
* The lightning arrester has a circuit to remove a surge voltage which damages field devices, so that signals
may be attenuated. Before installing a lightning arrester, verify that it works properly.

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RP-D58 Series5 How to Operate

5-1. Preparation for start-up

5

How to Operate
5-1. Preparation for start-up
Before supplying power, read and understand the following precautions. Ignoring these precautions may
cause an electric shock or damage the pump unit.






Check that the pump unit is installed properly.
Check that the pump unit is connected to a grounding circuit.
Check that the wiring is connected to external device properly.
Check that the tubes are installed properly.
Check that the power supply voltage is compliant with the power supply specification and does notexceed the rating.

5-2. Basic operating procedures
Normally, the detection mode is activated after the power is turned on.
The pump unit isrestarted after
recovering from fault.

<<Detection Mode>>
Lamp onLamp off
Lamp blinking<<Fault Status>>* Example of display: E-5 Low Flow Rate Alarm

RP-D58 Series- 30 -

6 Alarm Activation

5-4. How to exit

6

Alarm Activation
A fault alarm is triggered when the pump unit detects abnormalities. After a fault alarm is triggered, the fault
lamp (yellow) lights up and an error message is displayed on the LED. Determine the causes and takeappropriate actions.
After the pump unit is successfully returned from the fault, it restarts with the process normally performed
right after it is turned on (initial clear).
If the pump unit has problems and is repeatedly malfunctioning, contact RIKEN KEIKI immediately.

<Low Flow Rate Abnormal Operations>This alarm is triggered when the output value of the low flow sensor drops below the alarm setpoint.
The alarm is auto-reset when the flow rate exceeds a certain level.

Flow sensor
output value

Alarm setpoint value

0
Time

FAULT lamp lights up
Alarm delay time (15 seconds)

NOTE A low flow rate abnormality can be a cause of fault alarm.
For information on malfunctions (error messages), see "9. Troubleshooting".
 When a fault alarm is triggered, the indicator/alarm unit reports a sensor abnormality or fault alarm*.
* In case of used in combination with indicator/alarm unit.
* The display of an alarm depends on the indicator/alarm unit. For details, see the operating manual of
the indicator/alarm unit.

- 33 -

RP-D58 Series

7 Maintenance7-1. Maintenance intervals and items

7

Maintenance
The pump unit is an important instrument for the purpose of safety.
To maintain the performance of the pump unit and improve the reliability of safety, perform a regular
maintenance.
Continuing to use the pump unit without performing a maintenance will compromise the sensitivity of thegas sensor, thus resulting in inaccurate detection.

7-1. Maintenance intervals and items
 Daily maintenance: Regular maintenance:

Maintenance item

Perform maintenance before beginning to work.
Perform maintenance once or more every six months to maintain theperformance as a safety unit.
Maintenance content

Daily
maintenanceRegularmaintenancePower lamp check

Check that the power lamp lights up.



Status display check

Check that the status display is "run" andthat the fault lamp is off.

Flow rate check

Check that the float of the dust removal
filter with flow monitor is visible.

Flow sensor check

Check the flow sensor by using the test
pump.

-



RP-D58 Series- 34 -

7 Maintenance7-4. How to maintain flow sensor

7-4. How to maintain flow sensor
Remove the pump.

↓
2-6.3 Flow sensor zero point check
Press the SET key.

PW
◎

A
○

F
○

◎

○

○

↓
Flow sensor zero point checkcompleted
It automatically returns to 2-6.3 after
PASS is displayed.
* If the zero point check of the flow
sensor fails, it automatically returns
to 2-6.3 after FAIL is displayed.

LED

2- 6.3↓PASS↓
Return to 2-6.3.

↓↓

Install the test pump.

↓
2-6.4 Flow sensor output check
Check the flow sensor output during
the pump operation.

PW
◎

A
○

F
○

↓
Flow sensor output checkcompleted
It automatically returns to 2-6.4 after
PASS is displayed.
* If the output check of the flow
sensor failed, it automatically returns
to 2-6.4 after FAIL is displayed.

LED

2-6.4
↓

◎

○

○

PASS

↓
Return to 2-6.4.

- 39 -

RP-D58 Series

9 Troubleshooting

9

Troubleshooting
The Troubleshooting does not explain the causes of all the malfunctions which occur on the pump unit.
This simply helps to find the causes of malfunctions which frequently occur. If the pump unit shows asymptom which is not explained in this manual, or still has malfunctions even though remedial actions aretaken, please contact RIKEN KEIKI.

<Abnormalities on Unit>
Symptom/Display

The power cannot
be turned on.

Abnormaloperations

FAULT

―

―

Low flow rateabnormality
E-5

Systemabnormalities
E-9



RP-D58 Series

CausesActions

The wiring is not correct.

Connect the wiring properly.

The terminal plate isremoved.

Connect the terminal plate properly.

Abnormalities/momentary
blackout of power supply
systemProvide the rated voltage.
Take measures such as checking or adding the UPS,
power supply line filter and insulation transformer.

Cable abnormalities(open circuit/not
connected/short circuit)

Check the wiring of pump unit and related devices
around it.

Disturbances by sudden
surge noise,etc.

Turn off and restart the pump unit.
If such a symptom is observed frequently, takeappropriate measures to eliminate the noise.

The flow rate is low.

The possible causes are deterioration or clogging of thepump or clogging of the tube. Check the flow rate.

Faults of the flow sensor

Replace the sensor with a new one.

Abnormalities of ROM,
RAM, or EEPROM insideof the pump unit

Please contact RIKEN KEIKI.

- 42 -

10 Product Specifications

10-1. List of specifications

10

Product Specifications
10-1. List of specifications[RP-D58•DC]＜ATEX/UKEX Specifications＞
Model

RP-D58・DC

Display
Flow rate
Power display
External output
Fault alarm/self
diagnosis
Fault alarm display
Fault alarm patternFault alarm contact

Seven-segment LED(four-digit)
1.0 L/min or more (at maximum suction pressure of 5.0 kPa <gauge pressure>)
POWER lamp on (green)
Fault alarm contact
System abnormality/low flow rate

Contact capacity
Power/contact cable
Transmission distance
Initial clear
Power supply
Power consumption
Cable connecting port

FAULT lamp on (yellow)/detail display
Non latching (Auto-reset)
No-voltage contact 1a, de-energized (energized in response to an alarm) or energized(de-energized in response to an alarm)
30 VDC - 0.5A (resistant load)
CVVS, etc. (1.25mm2 or 2.0mm2) – 2-core or 4-coreLess than 375m in case of CVV 1.25mm2
Less than 550m in case of CVV 2.0mm2
Approx.25sec
24VDC±10%
Maximum 8.6W
Pressure proof packing gland<G3/4> (Compatible cables 9.0 - 16.0mm in outer
diameter)Tube connecting port

Rc1/8 (O.D8-1t half-union for Cu tube <Bs> supplied or half-union for SUS tube <SUS>)
Operating temperature-20 - +53ºC (non-rapidly-vary)
Operating humidity
Below 95% RH (Non-condensing)
Structure
Wall mounting type (2B<50A> pipe installation supported)
Explosion-proof structure Flame-proof enclosures
Explosion-proof class
Ⅱ 2G Ex db h ⅡB+H2 T4 Gb
IP ratingDimension
WeightOuter color

Equivalent to IP67
Approx. 197 (W) x 292 (H) x 140 (D) mm (projection portions excluded)
Approx. 5.8 kg
Munsell 7.5BG5/2* Specifications subject to changes without notice.

- 43 -

RP-D58 Series

10 Product Specifications

10-1. List of specifications[RP-D58•AC]＜Taiwan Ex(TS) Specifications＞
Model

RP-D58・AC

Display
Flow rate
Power display
External output
Fault alarm/self
diagnosis
Fault alarm display
Fault alarm patternFault alarm contact

Seven-segment LED(four-digit)
1.5 L/min or more (at maximum suction pressure of 5.3 kPa <gauge pressure>)
POWER lamp on (green)
Fault alarm contact
System abnormality/low flow rate

Contact capacity
Power cable
Transmission distance

FAULT lamp on (yellow)/detail display
Non latching (Auto-reset)
No-voltage contact 1a, de-energized (energized in response to an alarm) or energized(de-energized in response to an alarm)
250 VAC - 0.5 A/30 VDC - 0.5A (resistant load)
CVV, etc. (1.25mm2 or 2.0mm2) – 2-core or 3-coreLess than 1.25km in case of Cable 1.25mm2
Less than 2.0km in case of Cable 2.0mm2

Contact cable

CVVS, etc. (1.25mm2 or 2.0mm2)・2-core

Initial clear
Power supply
Power consumption
Cable connecting port

Approx. 25sec
100 - 110 VAC ±10%, 50/60 Hz
Maximum 13 VA

Tube connecting port

Rc1/8 (O.D8-1t half-union for Cu tube <Bs> supplied or half-union for SUS tube <SUS>)-20 - +50ºC (non-rapidly-vary)
Below 95% RH (Non-condensing)
Wall mounting type (2B<50A> pipe installation supported)
Flame-proof enclosures

Operating temperature
Operating humidity
Structure
Explosion-proof structure
Explosion-proof class
IP ratingDimension
WeightOuter color

Pressure proof packing gland<G3/4>(Compatible cables 9.0 - 16.0mm in outer
diameter)Ex d ⅡB+H2 T4 Gb
Equivalent to IP67
Approx. 197 (W) x 292 (H) x 140 (D) mm (projection portions excluded)
Approx. 5.8 kg
Munsell 7.5BG5/2* Specifications subject to changes without notice.

RP-D58 Series- 44 -

10 Product Specifications

10-1. List of specifications[RP-D58•DC]＜Taiwan Ex(TS) Specifications＞
Model

RP-D58・DC

Display
Flow rate
Power display
External output
Fault alarm/self
diagnosis
Fault alarm display
Fault alarm patternFault alarm contact

Seven-segment LED(four-digit)
1.0 L/min or more (at maximum suction pressure of 5.0 kPa <gauge pressure>)
POWER lamp on (green)
Fault alarm contact
System abnormality/low flow rate

Contact capacity
Power/contact cable
Transmission distance
Initial clear
Power supply
Power consumption
Cable connecting port

FAULT lamp on (yellow)/detail display
Non latching (Auto-reset)
No-voltage contact 1a, de-energized (energized in response to an alarm) or energized(de-energized in response to an alarm)
250 VAC - 0.5 A/30 VDC - 0.5A (resistant load)
CVVS, etc. (1.25mm2 or 2.0mm2) – 2-core or 4-coreLess than 375m in case of CVV 1.25mm2
Less than 550m in case of CVV 2.0mm2
Approx.25sec
24VDC±10%
Maximum 8.6W
Pressure proof packing gland<G3/4>(Compatible cables 9.0 - 16.0mm in outer
diameter)Tube connecting port

Rc1/8 (O.D8-1t half-union for Cu tube <Bs> supplied or half-union for SUS tube <SUS>)
Operating temperature-20 - +53ºC (non-rapidly-vary)
Operating humidity
Below 95% RH (Non-condensing)
Structure
Wall mounting type (2B<50A> pipe installation supported)
Explosion-proof structure Flame-proof enclosures
Explosion-proof class
Ex d ⅡB+H2 T4 Gb
IP ratingDimension
WeightOuter color

Equivalent to IP67
Approx. 197 (W) x 292 (H) x 140 (D) mm (projection portions excluded)
Approx. 5.8 kg
Munsell 7.5BG5/2* Specifications subject to changes without notice.

- 45 -

RP-D58 Series

10 Product Specifications

10-1. List of specifications[RP-D58•AC]＜Japan Ex Specifications＞
Model

RP-D58・AC

Display
Flow rate
Power display
External output
Fault alarm/self
diagnosis
Fault alarm display
Fault alarm patternFault alarm contact

Seven-segment LED(four-digit)
1.5 L/min or more (at maximum suction pressure of 5.3 kPa <gauge pressure>)
POWER lamp on (green)
Fault alarm contact
System abnormality/low flow rate

Contact capacity
Power cable
Transmission distance

FAULT lamp on (yellow)/detail display
Non latching (Auto-reset)
No-voltage contact 1a, de-energized (energized in response to an alarm) or energized(de-energized in response to an alarm)
250 VAC - 0.5 A/30 VDC - 0.5A (resistant load)
CVV, etc. (1.25mm2 or 2.0mm2) – 2-core or 3-coreLess than 1.25km in case of Cable 1.25mm2
Less than 2.0km in case of Cable 2.0mm2

Contact cable

CVVS, etc. (1.25mm2 or 2.0mm2)・2-core

Initial clear
Power supply
Power consumption
Cable connecting port

Approx. 25sec
100 - 110 VAC ±10%, 50/60 Hz
Maximum 13 VA
Pressure proof packing gland<G3/4>(Compatible cables 9.0mm - in outer diameter)

Tube connecting port

Rc1/8 (O.D8-1t half-union for Cu tube <Bs> supplied or half-union for SUS tube <SUS>)
Operating temperature-20 - +50ºC (non-rapidly-vary)
Operating humidity
Below 95% RH (Non-condensing)
Structure
Wall mounting type (2B<50A> pipe installation supported)
Explosion-proof structure Flame-proof enclosures
Explosion-proof class
Ex d ⅡB+H2 T4
IP ratingDimension
WeightOuter color

Equivalent to IP67
Approx. 197 (W) x 292 (H) x 140 (D) mm (projection portions excluded)
Approx. 5.8 kg
Munsell 7.5BG5/2* Specifications subject to changes without notice.

RP-D58 Series- 46 -

10 Product Specifications

10-1. List of specifications[RP-D58•DC]＜Japan Ex Specifications＞
Model

RP-D58・DC

Display
Flow rate
Power display
External output
Fault alarm/self
diagnosis
Fault alarm display
Fault alarm patternFault alarm contact

Seven-segment LED(four-digit)
1.0 L/min or more (at maximum suction pressure of 5.0 kPa <gauge pressure>)
POWER lamp on (green)
Fault alarm contact
System abnormality/low flow rate

Contact capacity
Power/contact cable
Transmission distance
Initial clear
Power supply

FAULT lamp on (yellow)/detail display
Non latching (Auto-reset)
No-voltage contact 1a, de-energized (energized in response to an alarm) or energized(de-energized in response to an alarm)
250 VAC - 0.5 A/30 VDC - 0.5A (resistant load)
CVVS, etc. (1.25mm2 or 2.0mm2) – 2-core or 4-coreLess than 375m in case of CVV 1.25mm2
Less than 550m in case of CVV 2.0mm2
Approx.25sec
24VDC±10%Power consumption
Cable connecting port

Maximum 8.6W

Tube connecting port

Rc1/8 (O.D8-1t half-union for Cu tube <Bs> supplied or half-union for SUS tube <SUS>)-20 - +53ºC (non-rapidly-vary)
Below 95% RH (Non-condensing)
Wall mounting type (2B<50A> pipe installation supported)
Flame-proof enclosures

Operating temperature
Operating humidity
Structure
Explosion-proof structure
Explosion-proof class
IP ratingDimension
WeightOuter color

Pressure proof packing gland<G3/4>(Compatible cables 9.0mm - in outer diameter)

Ex d ⅡB+H2 T4
Equivalent to IP67
Approx. 197 (W) x 292 (H) x 140 (D) mm (projection portions excluded)
Approx. 5.8 kg
Munsell 7.5BG5/2* Specifications subject to changes without notice.

- 47 -

RP-D58 Series

10 Product Specifications

10-2. Detection principle

10-2. Detection principle[Flow Sensor]
The flow sensor has a circuit that can output a contact signal when the flow rate drops below the preset
level.
The flow sensor is a hot-wire type with a Wheatstone bridge consisting of a detecting element,compensating element, and fixed resistance. Contained in a flame arrester container allows it to beflame-proof.
When the drawn air or gas comes into contact with the heated detecting element, the detecting element
temperature changes due to the heat dissipation, and the electrical resistance of the element changes
according to the temperature changes. Since the resistance changes are in proportion to the gas flow rates,
the Wheatstone bridge circuit can identify the changes as the flow rate.

Structure Diagram
C: Compensating
element

D: Detec ing element

Fixed
resistance

VR

Fixed
resistance

Variable resistor for bridge
equilibrium adjustment
SW
E

Variable resistor for bridge
voltage adjustment

SwitchPower supply

Basic Circuit

RP-D58 Series

Flow Sensor Appearance- 48 -