Yamato Scientific SQ 510 Autoclave, Sterilizers - Manual (Page 64)

61
Periodical Inspection
Periodical Voluntary Inspection of Small-sized Pressure Vessel
Inspection procedures
W
ater leak o
n solen
oi
d valve/
exha
ust valve
① Close the drain valve as soon as the safety valve operates.
穴を塞ぐ
② Pressurize the chamber inside. When the corrected pressure gauge reads 0.05MPa, 0.1MPa
and 0.15MPa, compare the readings between the corrected pressure gauge and the pressure
gauge on the main unit.
™ The tolerance of pressure accuracy compared should be within ±0.005 MPa. If it is beyond this
range, replace the pressure gauge.
Te
mperat
ure a
ccuracy
Check the temperatue accuracy by using either of following methods.
①
Fix a corrected temperature sensor (a recorder attached) or maximum thermometer near the
chamber temperature sensor inside the chamber. Perform the sterilizing operation at a preset
temperature of 135℃ with no load. Compare the temperature inside the chamber displayed
on the equipment with that indicated by the corrected thermometer. The temperature should
be between 135 and 137℃ to the preset temperature of 135℃. Use the service plug (internal
thread of R1/4) to fix the temperature sensor.
② Perform sterilization and compare the pressure and temperature at sterilization process. The
relation between the temperature inside the chamber and saturated pressure under the
atmosphere of 1013 hPa are as follows.
115℃: 0.068MPa, 133℃: 0.187MPa
121℃: 0.104MPa, 134℃: 0.202MPa
126℃: 0.138MPa, 135℃: 0.212MPa
131℃: 0.170MPa, 136℃: 0.221MPa
132℃: 0.171MPa, 137℃: 0.231MPa
™ If parts replacement, repair or correction is difficult to be done by yourselves, contact the selling office
where you purchased or our sales office.
Pressure
device
Close
Opening is
blocked.