Riken Keiki SD-1D User manual

PT2E-3030
Smart transmitter/
Gas Detector Head
SD-1D
（TYPE GP MED EX）
Operating Manual
(PT2E-161)

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.

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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............................................................................................................. 8
3-1. Gas detector and standard accessories .......................................................................... 8
3-2. Names and functions for each part.................................................................................. 9
3-3. Block diagram.................................................................................................................. 10
4 How to Use............................................................................................................................ 11
4-1. Before using the detector ................................................................................................ 11
4-2. Precautions for installation points.................................................................................... 11
4-3. Precautions for system designing.................................................................................... 12
4-4. How to install ................................................................................................................... 15
4-5. Installation procedure ...................................................................................................... 16
4-6. How to wire...................................................................................................................... 17
5 How to Operate ..................................................................................................................... 21
5-1. Preparation for start-up ................................................................................................... 21
5-2. Basic operating procedures............................................................................................. 21
5-3. How to start the detector ................................................................................................. 22
5-4. Modes ............................................................................................................................. 23
5-5. User mode....................................................................................................................... 24
5-6. How to exit....................................................................................................................... 26
6 Operations and Functions ..................................................................................................... 27
6-1. Gas alarm activation........................................................................................................ 27
6-2. Fault alarm activation ...................................................................................................... 28
6-3. External output operation ................................................................................................ 29
6-4. Other functions ................................................................................................................ 30
7 Maintenance.......................................................................................................................... 31
7-1. Maintenance intervals and items ..................................................................................... 31
7-2. Regular maintenance mode ............................................................................................ 33
7-3. Gas calibration method ................................................................................................... 40
7-4. Parts replacement ........................................................................................................... 44
8 Storage, Relocation and Disposal ......................................................................................... 46
8-1. Procedures to store the detector or leave it for a long time ............................................. 46
8-2. Procedures to relocate the detector or use it again ......................................................... 46
8-3. Disposal of products........................................................................................................ 46
9 Troubleshooting..................................................................................................................... 47
10 Product Specifications......................................................................................................... 49
10-1. List of specifications ...................................................................................................... 49
10-2. List of accessories......................................................................................................... 52
10-3. Detection principle......................................................................................................... 52
11 Definition of Terms............................................................................................................... 53

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-1D(TYPE GP MED EX). 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 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.
1-2. Purpose of use
The detector is a fixed type gas detector head that detects leak of combustible gases and that performs the
alarm activation when the gas concentration is over the setting value.
This 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.
An external pump etc. outside the detector introduces gas to perform gas detection.
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.

3 Product Components 3-3. Block diagram
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3-3. Block diagram
<Electric Diagram>
Controller
(CPU)
Power supply part
Display
(POWER) (ALARM) (FAULT)
Seven-segment LED
(four-digit)
Sensor
POWER INPUT (24 VDC)
1.Gas alarm contact (ALARM)
or
2.Fault contact (FAULT)
or
3.Select either gas alarm or
contact (ALARM/FAULT)
Contact activation
De-energized
(De-energized at a normal
state)
ON-ALARM (Closed
contact at an alarm state)
Alarm contact controller
Magnetic operation part
(MENU/ESC) (▲) (▼) (SET)
Transmitter
• 4 – 20 mA transmission

4 How to Use 4-3. Precautions for system designing
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please contact the manufacturer.)
Grounding In addition to lightning, there are more sources of surge noise. To protect units
from these 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.