Riken Keiki SD-D58-AC-GH User manual

PT2E-1758
Smart Transmitter/Gas Detector Head
SD-D58・AC・GH
SD-D58・DC・GH
Operating Manual

Operating Precautions
This detector is a gas detector that detects combustible gases in the air and triggers a gas alarm.
The gas detector is a safety unit, not an analyzer or densitometer which performs quantitative/qualitative
analysis/measurement for gases.
Please fully understand the following points before using it, so that it can be used properly.
1. This detector may be interfered by gases and vapors other than the gas to be detected.
Please note that the alarm may be triggered by interference. In addition, it may be fluctuated by
environmental (temperature, humidity, etc.) changes in the installation site.
2. The alarm must be set within a range where the performance of the detector can be ensured.
In facilities compliant with the High Pressure Gas Safety Act, an alarm setting below our standard
alarm setpoint may trigger a false alarm.
3. This is a safety unit, not a control unit.
The alarm contact output of the detector must be used for an external alarm lamp/buzzer, while the
alarm signal output must be used for an indicator or external recorder.
If these outputs are used to control other units, we shall not be responsible for any malfunctions.
4. The gas sensing part of the gas detection sensor installed in this detector is made of metal porous
sintered alloy permeated with an oxidation catalyst.
If silicon or sulfide compounds are accumulated on the surface of porous sintered alloy, the area of the
gas sensing part becomes smaller, which may results in serious deterioration of its sensitivity.
For safety reasons, do not use the detector under the presence of silicon or sulfide compounds even
though their amount is very small.
5. For maintenance of the detector, it must go through a regular maintenance, including replacement and
adjustment of the regular replacement parts as specified in the operating manual. In addition, because
this is a safety unit, it is recommended that a regular maintenance and a gas calibration are performed
every six months in accordance with the regulations.

SD-D58 Series
<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. Safty information ..................................................................................................... 6
3. Product Components............................................................................................... 9
3-1. Main unit and standard accessories ........................................................................ 9
3-2. Names and functions for each part.......................................................................... 11
3-3. Block diagram.......................................................................................................... 15
4. How to Use.............................................................................................................. 17
4-1. Before using the detector head ............................................................................... 17
4-2. Precautions for installation points............................................................................ 17
4-3. Precautions for system designing............................................................................ 18
4-4. How to install ........................................................................................................... 21
4-5. How to wire.............................................................................................................. 23
4-6. How to tube ............................................................................................................. 32
5. How to Operate ....................................................................................................... 33
5-1. Preparation for start-up............................................................................................ 33
5-2. Basic operating procedures..................................................................................... 34
5-3. How to start the detector head ................................................................................ 35
5-4. Modes...................................................................................................................... 36
5-5. Maintenance mode (User) ....................................................................................... 37
5-6. How to exit............................................................................................................... 39
6. Operations and Functions ....................................................................................... 40
6-1. Gas alarm activation................................................................................................ 40
6-2. Fault alarm activation .............................................................................................. 41
6-3. Low Flow Rate Abnormal Operations ...................................................................... 41
6-4. External output operation ........................................................................................ 42
6-5. Other functions ........................................................................................................ 43
7. Maintenance............................................................................................................ 44
7-1. Maintenance intervals and items ............................................................................. 44
7-2. Maintenance mode (Regular maintenance)............................................................. 46
7-3. Gas calibration method............................................................................................ 54
7-4. How to maintain flow sensor.................................................................................... 60
7-5. Parts replacement ................................................................................................... 61
8. Storage, Relocation and Disposal ........................................................................... 62
8-1. Procedures to store the detector head or leave it for a long time ............................ 62
8-2. Procedures to relocate the detector head or use it again ........................................ 62
8-3. Disposal of products................................................................................................ 62
9. Troubleshooting....................................................................................................... 63
10. Product Specifications ............................................................................................. 65
10-1. List of specifications ................................................................................................ 65
10-2. Detection principle................................................................................................... 76
11. Definition of Terms................................................................................................... 77

1 Outline of the Product 1-1. Preface
1SD-D58 Series
1
Outline of the Product
1-1. Preface
Thank you for choosing our smart transmitter/gas detector head SD-D58 series. Please check that the
model number of the product you purchased is included in the specifications on this manual.
This manual explains how to use the detector head and its specifications. It contains information required
for using the detector head 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 detector head.
The detector head has four types of SD-D58･AC･GH/SD-D58･DC･GH and HART communication SD-
D58･AC･GH(TYPE H)/SD-D58･DC･GH(TYPE H). Although the number of digits to display varies
depending on the detection range, this manual provides explanation using a detection range from 0 to
100.0 as examples (such as examples of LED display).
1-2. Purpose of use
The detector head is a fixed type detector head that detects leak of combustible/toxic gases and that
performs the alarm activation when the gas concentration is over the setting value.
The detector head is a safety unit, not an analyzer or densitometer which performs
quantitative/qualitative analysis/measurement for gases. Please fully understand the features of the
detector head before using it, so that it can be used properly.
The detector head draws air with the built-in pump, and detects abnormalities in the air caused by
presence of gases or other reasons (leak) with the built-in gas sensor. The concentrations of detected
gases are displayed on the seven-segment LED.
The detector head has a built-in alarm contact and can be used either as a gas alarm, fault alarm, or
common (gas, fault) alarm.
The detector head has a built-in low flow rate detection function and can trigger a fault alarm when the
flow rate inside the tubing drops below a fixed rate.
The detector head outputs gas concentration in 4 – 20 mA.
SD-D58 series have two types of power supply specifications.
SD-D58·AC·GH/SD-D58･AC･GH(TYPE H) AC power specification 100 - 110 VAC
SD-D58·DC·GH/SD-D58･DC･GH(TYPE H) DC power specification 24 VDC
TYPE H has HART communication function, and for specification with blow-by-blow HARTcommunication
refer to the separate volumes [HART communication function manual].

2-4. Safety Information
SD-D58 Series 6
2-4. Safety Information
Necessary information for explosion proof construction of Model SD-D58・AC・GH／SD-D58・DC・
GH.
The Model SD-D58・AC・GH／SD-D58・DC・GH is a fixed mount, continuous-monitoring detector head and
provides a 4-20mA signal which indicates the target gas reading for use by a gas monitoring controller,
recording device, or programmable controller.
There is one point of contact and works by gas warning or trouble or both by setting.
<ATEX Specifications>
Technical Data
(Protection Method) Flameproof enclosure “d”
(Group) II
(Category) 2G
(Type of Protection and Marking code) Ex db ⅡB+H2 T4
(Equipment Protection Level) Gb
(Ambient Temperature) -20C to +53C
(Electrical Data)
Supply voltage : 24Vdc(Typ.)
Output signal : 4 to 20 mA
Electrical rating : DC6.5V 205mA or DC3.5V 350mA
Flow rate element power output : DC2.0V 170mA
Analog signal output : DC24V 22mA
Relay(Contactoutput) : DC30V or AC250V 0.5A
(Applicable Standard) EN 60079-0 : 2012+A11:2013，EN 60079-1: 2014
Installation
【SD-D58･DC･GH/SD-D58･DC･GH(TYPE H)】

2-4. Safety Information
7 SD-D58 Series
<Taiwan Ex(TS) Specifications>
Technical Data
(Protection Method) Flameproof enclosure
(Explosion-proof class) Ex d ⅡB+H2 T4 Gb
(Ambient Temperature) Type AC : -20C to 50C
Type DC : -20C to 53C
(Electrical Data)
Supply voltage : Type AC : AC100～110V 50/60Hz 120mA
Type DC : DC24V 360mA
Electricalrating: DC6.5V 205mA or DC3.5V 350mA
Flow rate element power output : DC2.0V 170mA
Analog signal output : DC24V 22mA
Contact output : AC250V 0.5A(Load resistance)
DC30V 0.5A(Loadresistance)
(Applicable Standard) JNIOSH-TR-NO. 43(2008)
Installation
【SD-D58･AC･GH/ SD-D58･AC･GH(TYPE H)】 【SD-D58･DC･GH/ SD-D58･DC･GH(TYPE H)】

2-4. Safety Information
SD-D58 Series 8
<Japan Ex Specifications>
Technical Data
(Protection Method) Flameproof enclosure
(Explosion-proof class) Ex d ⅡB+H2 T4
(Ambient Temperature) Type AC : -20C to 50C
Type DC : -20C to 53C
(Electrical Data)
Supply voltage : Type AC : AC100～110V 50/60Hz 120mA
Type DC : DC24V 360mA
Electricalrating: DC6.5V 205mA or DC3.5V 350mA
Flow rate element power output : DC2.0V 170mA
Analog signal output : DC24V 22mA
Contact output : AC250V 0.5A(Load resistance)
DC30V 0.5A(Loadresistance)
(Applicable Standard) JNIOSH-TR-NO. 43(2008)
Installation
【SD-D58･AC･GH/ SD-D58･AC･GH(TYPE H)】 【SD-D58･DC･GH/ SD-D58･DC･GH(TYPE H)】

3-2. Names and functions for each part
SD-D58 Series 12
<Inside of the main unit> (Electric circuit section)
(1)
Terminal plate
(for power input supply)
Power input terminal plate. *1 *2
(2)
Terminal plate
(for contact and transmission output)
Alarm contact and gas concentration signal output terminal
plate.*3
(3)
Power switch Power switch of the detector head. *1
(4) Grounding terminal Terminal for grounding.(M4×6)
(5)
Fuse Main power fuse. *1
*1 Only SD-D58･AC･GH/SD-D58･AC･GH(TYPE H).
*2 The power input terminal plate of SD-D58･DC･GH/SD-D58･DC･GH(TYPE H) are as common as
terminal plate for contact and transmission output. See "4-5. How to wire <Figure of Terminal Plate>"
for details.
*3 SD-D58･DC･GH/SD-D58･DC･GH(TYPE H) are the power input and terminal plate for contact and
transmission output. See "4-5. How to wire <Figure of Terminal Plate>" for details.
(1) Terminal plate
(for power input supply)
(2) Terminal plate
(for contact and
transmission output)
(3) Power switch
(4) Grounding terminal
(
5
)
Fuse

3-2. Names and functions for each part
SD-D58 Series 14
<Inside of the main unit> (Drive section)
(1)
Gas sensor Gas detection sensor.
(2)
Flow sensor Sensor for detection of low flow rate.
(3)
Pump Sample draw pump.
NOTE
Open the drive lid and the hexagon socket head bolts
on the four corners.
Remove the drive lid to find the drive section shown in
the figure above.
The bolt with the hexagon socket must use the
stainless steel material of property class "A2-70".
Grease specified by RIKEN KEIKI : BARRIERTA JFE 552
(manufactured by NOK KLUBER)
If you can not prepare the specified grease, use one that
meets the following requirements.
1. Material does not harden due to deterioration
2. Volatile solvent-free
3. Material does not cause corrosion at the surface
4. Silicon-free
5. Validation of suitability depends on the specifications of grease manufacturer
(2) Flow sensor
(1) Gas sensor
(3) Pump
Drive lid