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8

 
 

 

4−4.How to install 

(1)

 

Mounting to the wall surface 
Mount  the  detector  head  to  a  flat  surface  (wall 
surface,  etc)  with  either  M6  bolts  or  M10  bolts 
through mounting holes.    Refer to  「3-1. External 
drawing」  for mounting pitch. 

(2)

 

Mounting to the pole 
The unit can be mounted to the pole (2B pipe) 

      by using the optional U-bolts shown in right 

  figure. 

(3)

 

Installation to the outdoors 
For outdoor installation, optional drip-proof cover 
is required to keep reliable detection although this 
is a drip-proof design.    Contact RIKEN KEIKI Co., 
Ltd. 

 
 
4−5.Caution at wiring construction 

 
 
 
 
 
 
 
 
 
 
4−6.Applicable cable 

Signal transmission     

: CVVS 1.25mm

2

, 2C or equivalent 

Transmission distance    : Within 600m at full lengths 
Cable O.D.   

 

:  φ8-φ11mm 

 
4−7.Example of cable connection 

 

(1) In case of non-explosion proof system 

①  Lead the applicable cable through cable inlet 

and connect to the terminal strip.   

②  Connect the other side of the cable to the 

  indicator/alarm unit side. 

③  Connect the shieldʼs drain ground on the   

  indicator/alarm unit side. 

 
 

             

 

・When make wiring construction, take care not to damage the internal electronics circuit.
・When handle the detector unit, put it at horizontal position.    If put it vertically, it tends

 

to fall and damage the detector.

 

・Power cable and signal cable shall not be laid down together with motive power cable 

such as motor, etc.

 

・When use twisted cable, take care not to contact a part of core cable with other core   

cable.

 

CAUTION 

 

 

ケーブルの接続

ケーブル 

 

 

端子台 

センサ 
リード線 

Sensor  lead 
wire 

Terminal 
strip

Cable connection 

Mounting to the pole 

2B pipe 

O.D. 60.5mm

U-bolt

 

 

Nominal  

diameter 50B

 

Cable 

Summary of Contents for GD-F4A-1

Page 1: ...ion for accidents and damage caused by using this product The indemnification shall be made only under the warranty policy of products or parts replacement Because this is a safety unit a regular main...

Page 2: ...tector head 2 Alarm level for gas alarm instrument shall be set within the performance of the instrument Our standard alarm level is 18 by volume for the prevention of oxygen deficiency 3 This is not...

Page 3: ...aution at piping works 10 Example of piping connection 10 HOW TO OPERATE Preparation for start up 12 How to start the detector head 12 How to exit 12 MAINTENANCE Maintenance intervals and items 13 Cal...

Page 4: ...tor alarm unit to show oxygen content Read the operating manual for indicator alarm unit as well as this manual This unit is designed as drip proof construction for outdoor installation Also it can be...

Page 5: ...interval Do not change or remodel the circuit structure of this unit Do not disassemble the sensor since there is a electrolyte inside If your finger touches the electrolyte wash your finger away with...

Page 6: ...3 PRODUCT COMPONENTS External drawing Cable inlet Cable inlet Sensor Gas inlet Protective ground Gas outlet For U bolt Cable inlet Sensor Gas inlet Protective ground Gas outlet For U bolt...

Page 7: ...yed terminal for sensor lead and external cable Cable gland Entrance to lead the cable 8 11mm from outside Hinge Hinge for front door Lock Lock for front door Mounting hole Mounting hole to fix this u...

Page 8: ...ormance division and group Performance division ia Group C 3 Relations between allowable inductance Lo and allowable capacitance Co of intrinsic safety circuit and external wiring inductance Lw and ca...

Page 9: ...inside detector head Drip proof housing Sensor lead Terminal strip Cable gland Shielded cable Oxygen sensor Gas inlet Gas outlet Detector head Indicator alarm unit Non hazardous area Non hazardous ar...

Page 10: ...to get direct rays of the sun Places closed to high temperature and or emission of electromagnetic wave Place with vibration or shocks Place where the mounting part is weak and it is easy to come out...

Page 11: ...t full lengths Cable O D 8 11mm Example of cable connection 1 In case of non explosion proof system Lead the applicable cable through cable inlet and connect to the terminal strip Connect the other si...

Page 12: ...or alarm unit and be specified that it is for power interruption of indicator alarm unit Ground the zener barrier separately corresponding to the A class grounding with ground resistance of 10 or less...

Page 13: ...G Use 8 O D 1t copper pipe and so on for piping Carry out piping works as straight as possible Excessively high load may cause burden on the suction pump shortening the effective life of the pump When...

Page 14: ...hen the pump cannot be used If the sample gas pressure would fluctuate use the constant flow rate control valve to keep the constant flow rate Exhaust the sampled gas to open air in principle When mak...

Page 15: ...ead sampled gas to 1 0L 0 3mL min Be sure to perform gas calibration at the time of new installation Correct reading may not be obtained before gas calibration How to exit Stop the sample gas supply t...

Page 16: ...is also necessary to carry out gas calibration at least every 6 months The law in Japan sets forth that the unit must issue an alarm during the circuit maintenance related to alarm while providing no...

Page 17: ...ag for calibration and confirm that the oxygen reading returns to 20 9vol Return disconnected piping to where they were completion of zero adjustment Performing a span adjustment Pack the span gas fre...

Page 18: ...at the top of terminal strip and disconnect two lead black and white wires Loosen the screw for sensor stopper and take off the sensor stopper Pull out the sensor upward from the holder Insert new sen...

Page 19: ...temperature 5 10 Environment of low oxygen content Put a sensor into the container and seal off the container List of recommendable spare parts for regular replacement No Name of parts Inspection fre...

Page 20: ...rent proportional to the oxygen content permeated through the membrane Refer to 10 DETECTION PRINCIPLE for details Zener barrier Safety retainer for explosion protection by limiting the energy of elec...

Page 21: ...Cable entry Cable gland Applicable cable O D 8 11mm Piping connection Rc 1 8 8 1t Provided with coupling Operating temperature 10 40 Operating humidity Below 90 RH Non condensing Structure Wall mount...

Page 22: ...base metal electrodes immersed in an electrolyte with a lead wire an electrochemical cell is formed A membrane covers the cell and allows oxygen to diffuse into the electrolyte at a rate proportional...

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