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９．PRODUCT SPECIFICATIONS

９−１．Standard specifications

Model

： GD-F4A-1

Detection principle

： Galvanic cell method

Target gas

： Oxygen in air

Sampling method

： Sample-drawing(flow-through type)

Signal transmission

： Sensor output direct transmission

Transmission cable

： CVVS 1.25mm

, 2C cable or equivalent

Transmission distance

： Max 600m with CVVS 1.25mm

, 2C cable

(between indicator/alarm unit and detector head)

Applicable zener barrier

： MTL 761Pac

Cable entry

： Cable gland (Applicable cable O.D. : φ8〜φ11mm)

Piping connection

： Rc 1/8, φ8-1t(Provided with coupling)

Operating temperature

： -10〜40℃

Operating humidity

： Below 90％RH (Non-condensing)

Structure

： Wall mounting/2B(50A) pole mounting

Kind of explosion proof

： Intrinsically safe(when zener barrier is used)

Explosion proof class

： ExiaⅡCT4X(when zener barrier is used)

Outer dimensionｓ

： Approx 175(H)×140(W)×86(D)mm

Weight

： Approx 1.5kg

Painting color

： Munsel No.2.5Y9/2 half tone

* Specifications subject to change without notice.

９−２．Standard accessories

・Operating manual
・Sensor

９−３．Optional accessories

・U-bolt (for nominal diameter 2B)
・Zener barrier (MTL761Pac）

Содержание GD-F4A-1

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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