PT2E-23811

Smart transmitter/Gas Detector HeadSD-1EC(TYPE HS)

Safety Manual

Document Number：PT2E-238(Rev.11)[Note] SD-1EC(TYPE HS)is certificated by the functional safety (IEC 61508:2010 Part2 and Part3). To
maintain the function described in the certificate, manage the detector head according to this manual.

Revision history
RevDetails

0

Newly created1

2-3,2-14 Update22-14 Update32-14 Update

42-14 Update

52-14 Update

62-14 Update72-14 Update82-14 Update92-14 Update10

2-9 and 2-14 Update11

2-9 and 2-14 Update

Approved by
Masaru Ishibashi
Dec 11,2015
Shinichi Yonemura
Mar 24,2016
Hiroki Muto
Jan 17,2017
Hiroki Muto
Dec 5,2017
Shinichi Yonemura
Apr 10,2018
Hiroki Muto
Oct 9,2019
Hiroki Muto
Dec 3,2019
Hiroki Muto
Mar 18,2020
Hiroki Muto
Jul 14,2020
Hiroki Muto
Jun 16,2021
Hiroki Muto
Jul 02,2021
Shinsuke kogure
Jul 18,2024

Reviewed by
Hiroki Muto
Dec 11,2015
Hiroki Muto
Mar 24,2016
Noriaki Tsuchiya
Jan 17,2017
Noriaki Tsuchiya
Dec 5,2017
Masayuki Uchida
Apr 10,2018
Noriaki Tsuchiya
Oct 9,2019Noriaki Tsuchiya
Dec 3,2019Noriaki TsuchiyaMar 18,2020
Noriaki Tsuchiya
Jul 14,2020
Noriaki Tsuchiya
Jun 16,2021
Noriaki Tsuchiya
Jul 02,2021
Kazunori Yamada
Jul 18,2024

Created by
Ryoji Hayashi
Dec 11,2015
Ryoji Hayashi
Mar 24,2016
Ryoji Hayashi
Jan 17,2017
Ryoji Hayashi
Dec 5,2017
Yuki SaikiApr 10,2018
Ryoji Hayashi
Oct 9,2019
Ryoji Hayashi
Dec 3,2019
Ryoji Hayashi
Mar 18,2020
Ryoji Hayashi
Jul 14,2020
Saiki Yuuki
Jun 16,2021
Yuuki Saiki
Jul 02,2021
Noriaki Tsuchiya
Jul 18,2024

Contents
1. Purpose .......................................................................................................................................................... 1
2. How to Use ..................................................................................................................................................... 2
2-1. Safety function ......................................................................................................................................... 2
2-2 Safety accuracy ........................................................................................................................................ 2
2-3 Diagnosis response .................................................................................................................................. 2
2-4 Setup ......................................................................................................................................................... 3
2-5 Proof test ................................................................................................................................................... 3
2-6 Repair and replacement ........................................................................................................................... 3
2-7 Startup time (initial clear time) .................................................................................................................. 3
2-8 Firmware update ....................................................................................................................................... 3
2-9 Reliability data ........................................................................................................................................... 3
2-10 Product service life.................................................................................................................................. 3
2-11 Required parameter settings ................................................................................................................... 4
2-12 Environmental restrictions ...................................................................................................................... 4
2-13 Application restrictions ............................................................................................................................ 4
2-14 Configuration of the hardware / software ................................................................................................ 4
2-15. Definition of terms and abbreviations .................................................................................................... 5

11.

PurposeThis safety manual describes the following information, for which users are responsible, when SD-1EC(TYPE HS) (hereinafter referred to as the detector head), a device certified by IEC 61508:2010 Part2 SIL 2capable and IEC 61508:2010 Part3 SIL 3 capable, is used as part of the safety instrumented function: Proof
test, repair and replacement, reliability data, product service life, environmental and usage restrictions,setting parameters, etc. To use the detector head safely, read this safety manual and all related documents.

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22.

How to Use

2-1. Safety function
The safety function of the detector head includes the following:• Monitoring toxic gas concentration at sampling points.
• Outputting a current according to monitored gas concentration to the upper system side. The output
function of the detector head is 4-20 mA output and HART communication output (*).
• About 4-20 mA output
Measured toxic gas concentration and 4-20 mA output are in a proportional relationship. For example, 4 mA
is output when concentration is 0ppm, and 20 mA is output when concentration is full scale. During a failure,
a current of 3.6 mA or less or 21 mA or more is output.
* HART communication output is not included in the safety function.
System example
The following example shows a system where the solenoid valve is controlled and blocked through PLC.
4-20mA
SD-1EC

PLC(TYPE HS)

Solenoid valve

2-2 Safety accuracy
Safety accuracy: 20%* An internal part failure that causes a difference exceeding this accuracy is counted in the FMEDA failurerate.

2-3 Diagnosis response
Maximum response time for self-diagnosis results: 15 seconds* It means that a part failure detected in self-diagnosis is notified within this time limit. This is a total time ofa self-diagnosis test interval and a failure response time.
* The maximum response time is 24 hours because of self-diagnosis of ROM / RAM check is performed
once in only one day.

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2-4 Setup
See the separate document "Operating Manual". Never fail to inspect parameters that are set.

2-5 Proof test
For a proof test interval, recommends one year.
Proof test procedure(1) Never fail to bypass the safety function.
(2) Confirm that the gas concentration reading on the detector head is zero.
(3) Introduce a gas for calibration gas.
(4) Check the gas response time and 4-20 mA output value.
(5) Finish the procedure by resetting the bypass for the safety function.
*A proof test must be run by a trained service man because performing it incorrectly may cause a
malfunction of the detector head.

2-6 Repair and replacement
See the separate document "Operating Manual".

2-7 Startup time (initial clear time)
About the first 25 seconds after turning on the detector head is the initial clear time. During that period, agas cannot be detected correctly.

2-8 Firmware update
To update firmware, the detector head must be returned to the RIKEN KEIKI factory.

2-9 Reliability data
Information such as the failure rate, failure mode, etc. is described in the FMEDA report (No.RK 15/06-015
R001 V4R1). See the separate document "FMEDA Report".
To meet SIL2, use with HFT=0. To meet SIL3, use with HFT=1.

2-10 Product service life
Product service life: 10 years from the date of manufacture
Reliability data in the FMEDA report are valid only during this period.

32-11 Required parameter settings•••

During a burnout (failure), 4-20 mA output value becomes 3.6 mA or less or 21 mA or more.
For security reasons, use the write protection function, which does not allow setting changes through
HART communication.
To use the detector head as the functional safety, never fail to follow the above item.

2-12 Environmental restrictions
For environmental restrictions, see the separate document "Operating Manual".

2-13 Application restrictions
For application restrictions, see the separate document "Operating Manual".

2-14 Configuration of the hardware / software
The hardware and software versions that can be combined are as follows.
Hardware Version
V1.1
V1.1
V1.3
V1.3

Software Version
V1.1
V1.1-1
V1.1
V1.1-14

2-15. Definition of terms and abbreviations
Terms
SafetyFunctional Safety
Basic Safety
Safety Assessment
Fail-Safe State
Fail Safe
Fail Dangerous

Fail Dangerous
Undetected
Fail Dangerous
Detected
Fail Annunciation
Undetected
Fail AnnunciationDetected
Fail No Effect
Low demand mode

Freedom from unacceptable risk of harm
The ability of a system to carry out the actions necessary to achieve or tomaintain a defined safe state for the equipment under control of the system
The equipment must be designed and manufactured such that it protects
against resulting fire and explosion under explosive atmosphere.
The investigation to arrive at a judgment - based onevidence - of the safety achieved by safety-related systems
State that the defined fail-safe
Failure that go to the defined fail-safe state without a demand from the process
Failure that does not respond to a demand from the process(i.e. being unable to go to the defined fail-safe state).
Failure that deviates the process signal or the actual output by more than 20%of span, drifts away from the user defined threshold (Trip Point) and that leaves
the output within active scale.
Failure that is dangerous and that is not being diagnosed by automatic stroke
testing.
Failure that is dangerous but is detected by automatic stroke testing.
Failure that does not cause a false trip or prevent the safety function but doescause loss of an automatic diagnostic and is not detected by anotherdiagnostic.
Failure that does not cause a false trip or prevent the safety function but does
cause loss of an automatic diagnostic or false diagnostic indication.
Failure of a component that is part of the safety function but that has no effecton the safety function.
Mode, where the frequency of demands for operation made on a safety-related
system is no greater than twice the proof test frequency.

5Abbreviations
FMEDA
HFT

MOC

PFDavgSFF

SIF
SILSIS

Failure Modes, Effects and Diagnostic Analysis
Hardware Fault Tolerance
Tolerance that to keep executing the function requested under the hardware
fault and error condition
Management of ChangeManagement of change the hardware or software elements, and keep
traceability
Average Probability of Failure on Demand
Safe Failure Fraction
The fraction of the overall failure rate of a device that results in either a safe
fault or a diagnosed unsafe fault.
Safety Instrumented Function
A set of equipment intended to reduce the risk due to a specific hazard.
Safety Integrity Level
Discrete level (one out of a possible four) for specifying the safety integrity
requirements of the safety functions to be allocated to the E/E/PE
safety-related systems where Safety Integrity Level 4 has the highest level ofsafety integrity and Safety Integrity Level 1 has the lowest.
Safety Instrumented System
Implementation of one or more Safety
Instrumented Functions. A SIS is composed of any combination of sensor(s),logic solver(s), and final element(s).
End of the manual

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