Riken Keiki SD-1EC User manual

PT2E-17610
Smart Transmitter/Gas Detector Head
SD-1EC
Operating Manual
(PT2E-176)
(PT2-176)

Operating Precautions
This detector is a gas detector that detects toxic 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. The detector may be interfered by gases other than the gas to be detected, solvents, vapors etc.
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 (threshold limit value) 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
analog signal output must be used for an indicator or external recorder.
4. Because the contact point of the gas detector sensor is made of porous polymeric membrane, the water
repellency of the membrane is deteriorated by solvents, thus causing an electrolyte leak from its inside.
Do not use solvents near the detector. If a solvent is used for unavoidable reasons, attach the
recommended filter to the inlet of the gas detector while using the solvent and for one hour after that.
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 calibration are performed
every six months in accordance with the regulations.

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<Contents>
1 Outline of the Product ......................................................................................................... 2
1-1. Preface.............................................................................................................................. 2
1-2. Purpose of use .................................................................................................................. 2
1-3. Definition of DANGER, WARNING, CAUTION, and NOTE............................................... 2
1-4. Method of confirmation for Standards and Explosion proof specification .......................... 3
2 Important Notices on Safety................................................................................................ 4
2-1. Danger cases .................................................................................................................... 4
2-2. Warning cases .................................................................................................................. 5
2-3. Precautions ....................................................................................................................... 6
2-4. Safety Information ............................................................................................................. 7
3 Product Components .......................................................................................................... 9
3-1. Gas detector and standard accessories............................................................................ 9
3-2. Names and functions for each part ................................................................................... 10
3-3. Block diagram ................................................................................................................... 11
4 How to Use ......................................................................................................................... 12
4-1. Before using the detector .................................................................................................. 12
4-2. Precautions for installation points...................................................................................... 12
4-3. Precautions for system designing ..................................................................................... 13
4-4. How to install..................................................................................................................... 15
4-5. Installation procedure........................................................................................................ 17
4-6. How to wire ....................................................................................................................... 19
5 How to Operate................................................................................................................... 23
5-1. Preparation for start-up ..................................................................................................... 23
5-2. Basic operating procedures............................................................................................... 23
5-3. How to start the detector ................................................................................................... 24
5-5. Maintenance mode (User)................................................................................................. 26
5-6. How to exit ........................................................................................................................ 28
6 Operations and Functions................................................................................................... 29
6-1. Gas alarm activation ......................................................................................................... 29
6-2. Fault alarm activation ........................................................................................................ 30
6-3. External output operation .................................................................................................. 31
6-4. Other functions.................................................................................................................. 32
7 Maintenance ....................................................................................................................... 33
7-1. Maintenance intervals and items....................................................................................... 33
7-2. Maintenance Mode(Regular maintenance) ....................................................................... 35
7-3. Calibration method ............................................................................................................ 42
7-4. Parts replacement ............................................................................................................. 45
8 Storage, Relocation and Disposal....................................................................................... 47
8-1. Procedures to store the detector or leave it for a long time............................................... 47
8-2. Procedures to relocate the detector or use it again........................................................... 47
8-3. Disposal of products.......................................................................................................... 47
9 Troubleshooting .................................................................................................................. 48
10 Product Specifications......................................................................................................... 50
10-1. List of specifications ........................................................................................................ 50
10-2. Detection principle........................................................................................................... 54
11 Definition of Terms............................................................................................................... 55

1 Outline of the Product 1-1. Preface
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1
Outline of the Product
1-1. Preface
Thank you for choosing our smart transmitter/gas detector head SD-1EC. 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 and its specifications. It contains information required for
using the gas detector 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.
Although the number of digits to display varies depending on the detection range, this manual provides
explanation using a detection range from 0 to 150ppm as examples (such as examples of LED display).
1-2. Purpose of use
This detector is a fixed type gas detector head that detects leak of toxic gases and performs the alarm
activation when the gas concentration is over the setting value.
The detector 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 before using it,
so that it can be used properly.
The detector 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 has a built-in alarm contact and can be used either as a gas alarm, fault alarm or
common (gas, fault) alarm.
The detector outputs gas concentration in 4 – 20 mA.
1-3. Definition of DANGER, WARNING, CAUTION, and
NOTE
DANGER This message indicates that improper handling may cause serious damage on
life, health or assets.
WARNING This message indicates that improper handling may cause serious damage on
health or assets.
CAUTION This message indicates that improper handling may cause minor damage on
health or assets.
NOTE This message indicates advice on handling.

1 Outline of the Product 1-4. Method of confirmation for Standards and Explosion proof specification
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1-4. Method of confirmation for Standards and
Explosion proof specification
This instrument has some specification depends on standard and explosion proof certificate. Please
confirm the detector specification before using. Please refer Declaration of Conformity that is at the end of
this manual if you have CE marking type. You can confirm instrument specification to see name plate as
follows.
ATEX/IECEx, CE marking type name plate TIIS type name plate
TIIS certificate
CE marking
Ex marking

2 Important Notices on Safety 2-1. Danger cases
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2
Important Notices on
Safety
2-1. Danger cases
DANGER
<About explosion-proof>
The window plate material is a polycarbonate resin. Do not use organic solvents and alkali types
(liquid or vapor). It may cause the color and shape of the window plate to be changed.
Do not open the lid when applying current.
Do not attempt to repair the detector.
For the lid, use hexagon socket head bolts specified by RIKEN KEIKI.
Do not apply a strong force or shock to the window plate. The explosion-proof performances may
be deteriorated due to damages. The explosion protection conditions for the detector is "low (2J)"
possibility of mechanical damage.
Ambient temperature:
ATEX/IECEx Specifications: -20 to +60°C
TIIS Specifications: -20 to +53°C
(The ambient temperature on explosion-proof certification is described above and it indicates the
temperature range which can maintain the explosion-proof performance and not the product
performance, see “10-1. List of specifications” for details.)
Do not replace parts at your sole discretion but contact RIKEN KEIKI if the transparent window
has a crack or the explosion-proof joint surface is abnormal, or the clamping screw or bolt is
changed, lost etc.
Do not repair the explosion-proof joint surface.
Be careful not to hit sharp tools against the window plate.

2 Important Notices on Safety 2-2. Warning cases
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2-2. Warning cases
WARNING
Power supply
Before turning on the detector, always check that the voltage is properly applied. Do not use an
unstable power supply because it may cause malfunctions.
Need of grounding circuit
Do not cut the grounding circuit or disconnect the wire from the grounding terminal.
Defects in protective functions
Before starting the detector, check the protective functions for defects. When seeming defects are
found in the protective functions, such as protective grounding, do not start the detector.
External connection
Before connecting the detector to the external control circuit, securely connect it to a protective
grounding circuit.
Zero adjustment in the atmosphere
When the zero adjustment is performed in the atmosphere, check the atmosphere for freshness
before beginning the adjustment. If interference gases exist, the adjustment cannot be performed
properly, thus leading to dangers when the gas leaks.
Response to gas alarm
Issuance of a gas alarm indicates that there are extreme dangers. Take proper actions based on
your judgment.
Handling of sensor
Do not disassemble the sensor used by the detector because it contains electrolyte. Electrolyte
may cause severe skin burns if it contacts skin, while it may cause blindness if its contacts eyes. If
electrolyte is adhered on your clothes, that part on your clothes is discolored or its material is
decomposed. If contact occurs, rinse the area immediately with a large quantity of water.

2 Important Notices on Safety 2-3. Precautions
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2-3. Precautions
CAUTION
Do not use a transceiver near the detector.
Radio wave from a transceiver or other radio wave transmitting device near the detector or its
cables may disturb readings. If a transceiver or other radio wave transmitting device is used, it
must be used in a place where it disturbs nothing.
To restart the detector, wait for five seconds or more before doing it.
Restarting the detector in less than five seconds may cause errors.
Do not use the external output of the detector to control other units.
This is not a control unit. It is not allowed to use the external output of the detector to control other
units.
Do not disassemble/modify the detector, or change the settings if not necessary.
Disassembling/modifying the detector will invalidate the warranty of the performance. Changing the
settings without understanding the specifications may cause alarm malfunctions. Please use the
detector properly in accordance with the operating manual.
Avoid applying organic solvents and others to the window plate for a long time.
The window plate material is a polycarbonate resin. When organic solvents (liquid or highly-
concentrated vapor) and others are applied to the plate for a long time, its color and shape may be
changed.
Never fail to perform a regular maintenance.
Since this is a safety unit, a regular maintenance must be performed to ensure safety. Continuing
to use the detector without performing a maintenance will deteriorate the sensitivity of the sensor,
thus resulting in inaccurate gas detection.

2 Important Notices on Safety 2-4. Safety Information
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2-4. Safety Information
Necessary information for explosion proof construction of Model SD-1EC.
The Model SD-1EC 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/IECEx Specifications>
Technical Data
(Protection Method) Flameproof enclosure “d”
(Certificate Numbers) IECEx DEK 13.0024X
DEKRA 13ATEX0035 X
(Group) II
(Category) 2G
(Type of Protection and Marking code) Ex db llC T6
(Equipment Protection Level) Gb
(Ambient Temperature)* -20C to +60C
(Electrical Data) Supply voltage: 24 V DC ±10% 45mA
Output signal (4 to 20 mA): DC24V 22mA
Relay(Contactoutput):DC30VorAC250V0.5A
(Applicable Standard) IEC 60079-0: 2017，IEC 60079-1: 2014-06
EN IEC 60079-0: 2018，EN 60079-1: 2014
(Manual Number) PT2E-176
* The ambient temperature on explosion-proof certification is described above and it indicates the
temperature range which can maintain the explosion-proof performance and not the product performance,
see “10-1. List of specifications” for details.
Installation
GND
Sig+
RLY
GND
Sig+
RLY
Indicator etc.
24V
GasDetector (SD‐1EC)
Hazardous Location
(Zone1)
Nonhazardous Location
InstallationDiagram
CVVSCable
24V

2 Important Notices on Safety 2-4. Safety Information
- 8 -
<TIIS Specifications>
Technical Data
(Protection Method) Flameproof enclosure
(Explosion-proof class) Ex d llC T6 X
(Ambient Temperature)* -20C to +53C
(Electrical Data) Supply voltage: DC24V±10% 45mA
Detecting element output signal: DC0.5V 0.5mA
Analogsignaloutput:DC24V22mA
Contact output (Contact capacity): AC250V 0.5A (Load resistance)
DC30V 0.5A (Load resistance)
(Applicable Standard) JNIOSH-TR-NO. 43(2008)
* The ambient temperature on explosion-proof certification is described above and it indicates the
temperature range which can maintain the explosion-proof performance and not the product performance,
see “10-1. List of specifications” for details.
Installation
GND
Sig+
RLY
GND
Sig+
RLY
Indicator etc.
24V
GasDetector (SD‐1EC)
Hazardous Location
(Zone1)
Nonhazardous Location
InstallationDiagram
CVVSCable
24V