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Summary of Contents for Riken Keiki GD-F4A-SC-A
- Page 1 PT2E-2510 Oxygen Gas Detector Head GD-F4A-SC-A Operating Manual (PT2-152)
- Page 2 [OPERATING PRECAUTIONS] This is a fixed type gas detector (head) and alarm instrument to detect oxygen gas in air. The gas alarm instrument is a safety instrument, not an analyzer nor measuring instrument to make quantitative and qualitative analysis or measurement. Please understand following points and use this detector head correctly.
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Page 3: Table Of Contents
TABLE OF CONTENTS １．OUTLINE OF THE PRODUCT １－１． Preface ………………………………………………………………………… １－２． Purpose of use ………………………………………………………………… １－３． Definition of DANGER, WARNING, CAUTION and NOTE…………………… ２．IMPORTANT INSTRUCTIONS FOR THE SAFETY ２－１． Danger cases…………………………………………………………………… ２－２． Warning cases…………………………………………………………………… ２－３． Caution cases…………………………………………………………………… ２－４． Caution for explosion proof (In case of intrinsically safe design)…………… ３．PRODUCT COMPONENTS ３－１．... -
Page 4: １．Outline Of The Product
First of all, verify that the model number of this product is identical with specifications described in this manual. This manual is a guide to operation of the GD-F4A-SC-A. All parsons who use this unit for the first time and who has ever used this unit are requested to read through the manual to understand the content before use. -
Page 5: ２．Important Instructions For The Safety
２. IMPORTANT INSTRUCTIONS FOR THE SAFETY ２－１．Danger cases DANGER In case of non-explosion poof system, do not use this unit at the place where combustible gas may exist. ２－２．Warning cases WARNING ・Do not cut the wire for protective ground both inside and outside of instrument. Or, do not disconnect the connection of the ground terminals. -
Page 7: ３－２．Name Of Each Part And Functions
３－２．Name of each part and functions ④ ⑧ ⑩ ⑥ ⑬ ⑨ ① ⑦ ⑪ ⑫ ⑭ ③ ② ⑮ ⑤ ① Oxygen sensor : Galvanic type sensor to detect oxygen content. ② Sensor holder : This is a retainer to hold the oxygen sensor (equipped filter inside). - Page 8 ！ WARNING 1. The oxygen detector shall be used as following composition. Non-hazardous Hazardous area area Ｌｉ Ｌｏ Ｃｉ Ｃｏ Ｌｗ Ｃｗ Oxygen detector Safety retainer Ｌｉ≒ 0 Ｃｉ≒ 0 ≒ 0 shows a negligible value 2. The safety retainer to be connected with oxygen detector shall have linear characteristics and be passed the type approval as it is.
- Page 9 (2) Non-explosion proof system Non-hazardous area Non-hazardous area 4-20mA Detector head CVVS 1.25mm 2-core or equivalent (MAX 2km) (3) Component inside detector head Sensor lead wire Terminal 4-20mA sensor Gas inlet Cable gland Cable Gas outlet...
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Page 10: ４．How To Use
4．HOW TO USE ４－１．Before using the detector head All persons who use this detector for the first time and who has even used the detector are requested to follow all the instructions for use carefully. If not, the instrument may be defective and correct gas detection may not be performed. - Page 12 250m(CVVS 1.25mm barrier（MTL7728ac） １ ３ ４ ２ Connection Connection cable cable GD-F4A-SC-A Non-hazardous Hazardous zone zone WARNING ・ Ground the zener barrier separately corresponding to the A-class grounding with ground resistance of 10Ω or less. ・ Use the specified cable.
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Page 13: ４－８． Caution At Piping Works
Applicable piping is φ8 (O.D)-1t copper pipe. Secure the piping connections not to leak. The piping material will be changed depending on corrosive gas contained in a sampled gas. In such case, contact RIKEN KEIKI Co., Ltd. (1) In case of pump suction... - Page 14 (2) In case of pressurized sample gas GD-F4A-SC-A Detection point Gas OUT 1.0±0.3 L/min Flow control valve Flowmeter Dust filter (3) In case of aspirator suction Detection GD-F4A-SC-A point Instrumentation air Air consumption ：1-3Nℓ/min pressure：1-35kg/cm2G Aspirator Flow control Flowmeter valve Dust filter ！...
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Page 15: ５．How To Operate
５．HOW TO OPERATE ５－１．Preparation for start up Before making power on, take care of the following. If do not keep this, there is the danger of electrical shock and damage of instrument. WARNING ・ Make protective grounding. ・ Check that the wiring with outer unit is made correctly. ・... -
Page 16: ６．Maintenance
- Maintenance Contract – Be sure to perform the regular maintenance since this is an instrument for security and safety. If this detector head founds defective, contact RIKEN KEIKI immediately. ６－１．Maintenance intervals and items The maintenance includes a daily maintenance which a person in charge of control and... -
Page 17: ６－２．Calibration
６－２．Calibration Perform gas calibration at new installation, 6 months maintenance and sensor replacement. ６－２－１．Required kit and tools for calibration Prepare following jigs and tools to perform zero and span adjustments. Calibration gas (standard gas for zero and span) Gas sampling bag for calibration gas ... -
Page 18: ６－３．Replacing The Sensor ６－３－１．Replacement Intervals Of The Sensor
* NOTE ・Output current corresponding to gas concentration is a linear and obtained by following equation. Oxygen concentration (vol%) Output current (mA) = 4 + 16 x Full scale concentration (vol%) ６－３．Replacing the sensor ６－３－１．Replacement intervals of the sensor To maintain the reliability of the measurement, it is recommendable to replace the sensor periodically. -
Page 20: ６－４．Storage Or Treatment When Not In Use For A Long Period
６－４．Storage or treatment when not in use for a long period Oxygen sensor is a kind of cell and will continue to consume its life even though it is not used. When detector head is not used for a long period, take out the sensor from detector head and store it at following environment to make lower the consumption of sensor. -
Page 21: ７．Storage,Relocation And Disposal
７．STORAGE,RELOCATION AND DISPOSAL ７－１．Procedures to store the detector head or leave it for a long time The detector head must be stored under the following environmental conditions. In a dark place under the normal temperature and humidity away from direct sunlight ... -
Page 22: ８．Measures At Abnormal Case
８．MEASURES AT ABNORMAL CASE ８－１．Responding to trouble alarm If this detector founds defective, contact our authorized agent or RIKEN KEIKI. ８－２．Before it is thought to be a trouble It may be caused by cable disconnection, short circuit, etc. ・Check the wirings around the related instruments as well as this detector head. -
Page 23: ９．Product Specifications
９．PRODUCT SPECIFICATIONS ９－１．Standard specifications Model GD-F4A-SC-A Detection principle Galvanic cell method Detectable gas Detection method Suction method (with flow passage) Suction flow 1.0±0.3L/min Transmission method Analog transmission Transmission specification 4-20mADC Transmission cable CVVS 1.25mm ・2-core or equivalent Transmission distance Up to 2km with CVVS 1.25mm... -
Page 25: １０．Definition Of Terms
10．DEFINITION OF TERMS Galvanic cell Galvanic cell type oxygen sensor that produces a current proportional to the oxygen content permeated through the membrane. Refer to “9-4. Detection principle” for details. Zener barrier Safety retainer for explosion protection by limiting the energy of electric current within a non-ignition level. - Page 26 Manual Log Rev. Amendment Issue data First issue 2018/2/9...
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