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Mount the device on vapor lock [ photo : A ].

Fit the handle knob (coupler) to the reel [ photo : B ].
[ Fit the handle knob (coupler) to the gas suction port (loosen/tighten the lock screw. ]

Turn the gas seal rotor in the direction of "HOSE UP/DOWN" (counterclockwise at full position) [ photo : C ],
and open the vapor lock.

Loosen the reel lock [ photo : D ], and lower the hose to the desired level.
* The approximate level (hose length) can be easily read on Indicator [ photo : H ].

Lock the reel, and turn the gas seal rotor in the direction of "GAS SEAL"(clockwise, until gas leakage stops)
[ photo : C ].

Fit the hose(coupler)[oxygen meter/gas detector] to the gas suction port [ photo : E ], tighten the lock screw
[ photo : F ]. (Fit the hose to the oxygen meter / gas detector beforehand.)

Hereinafter, follow the operation procedure of oxygen meter / gas detector.
[ Calibration of device can be done by detaching the hose (coupler) ]

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After detection, detach the hose (coupler) [ photo : E ], and fit the handle knob (coupler) to the reel [ photo : B ].

Turn the gas seal rotor in the direction of "HOSE UP/DOWN" (counterclockwise at full position) [ photo : C ], and wind up the hose.

While winding up the hose, move the hose guide pulley to place the hose in good order [ photo : G ].

Close the vapor lock, and dismount Gas Sampling (Sealing) Attachment.