
B-70265EN/02 APPENDIX H.EXTERNAL GAS LEAKAGE RECORDING TABLE
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External Gas Leakage Recording Table
Date: / /
Customer Name
Customer Staff in Charge
Record necessary data according to the procedure below.
Primary pressure gage
(C)
Secondary pressure
adjustment handle (A)
Secondary
pressure gage (D)
To laser oscillator
Main cylinder valve
(B)
Gas cylinder
Fig. H Gas regulator
Recording procedure
<1> Stop the oscillator, and complete purging. Then, turn off the power.
<2> When 5 minutes or more has elapsed after the power is turned off, turn the secondary pressure
adjustment handle (A) of the gas regulator in the depressurization direction, and close the main cylinder
valve (B) after closing all adjustment nozzles.
<3> Record the readings of the primary pressure gauge (C) and secondary pressure gauge (D) together with
start time and ambient temperature data.
Primary pressure gauge
(C1)
Secondary pressure
gauge (D1)
Start time (t1) Ambient temperature
(kgf/cm
2
,Mpa) (kgf/cm
2
,Mpa)
Day hours minutes °C
(After recording the data above, leave the oscillator for 8
hours as it is, then record the data below.)
<4> Record the readings of the primary pressure gauge (C) and secondary pressure gauge (D) together with
start time and ambient temperature data after a certain time (8 hours as standard, but desirably a period
of time a little bit longer than 8 hours).
Primary pressure gauge
(C2)
Secondary pressure
gauge (D2)
End time (t2) Ambient temperature
(kgf/cm
2
,Mpa) (kgf/cm
2
,Mpa)
Day hours minutes °C
<5> Open the main cylinder valve (B) slowly
(Note)
. After the main cylinder valve is fully opened, record the
reading of the primary pressure gauge (C).
Primary pressure gauge
(C3)
(kgf/cm
2
,Mpa)
NOTE
When opening the main cylinder valve, do not stand in front of the regulator but
stand slantwise relative to the regulator. When the main cylinder valve is opened
if there is a large amount of leakage, the regulator may be destructed because an
abrupt pressure is applied to the regulator, and broken pieces can scatter.
<6> End of measurement