SK00-9662-EI-103-00
9
4.
Zero point adjustment and atmospheric pressure adjustment
This unit can measure more accurately by adjusting the zero point and atmospheric
pressure.
If there is a discrepancy between the indicated value on the atmospheric pressure side
or the zero point side, adjust according to the following procedure.
4.1.
Adjusting method
Zero point adjustment and atmospheric pressure adjustment can be performed with UL-
MOBI by connecting an Android/Windows device with UL-MOBI installed to SWU10-U with a
USB cable.
Based on the signal from the sensor, it automatically determines whether to perform
zero point adjustment or atmospheric pressure adjustment.
Zero point adjustment
If the adjustment is performed immediately after the pressure drops below 1×10
-2
Pa,
the temperature inside the sensor is not in equilibrium and the error may increase.
Also, do not disconnect the USB cable connected to the Android/Windows devices until
the adjustment is completed.
The adjustment range is about ±1Pa in the unadjusted state. If the adjustment is not
possible, the life of the sensor may be due to dirt on the filament.
①
Exhaust the vacuum chamber.
②
Use a vacuum gauge such as an ionization vacuum gauge and check that the pressure
in the vacuum chamber is 1×10
-2
Pa or less.
③
Keep it at 1×10
-2
Pa or less for 5minutes or more.
④
Make adjustments.
Atmospheric pressure adjustment
If the adjustment is performed immediately after the vacuum state changes to 1×10
+5
Pa,
the temperature inside the sensor is not in equilibrium and the error may increase.
Also, do not turn off the power of this unit until the adjustment is completed.
The adjustment range is about 1×10
+4
Pa to 2×10
+5
Pa in the unadjusted state. If the
adjustment is not possible, the life of the sensor may be due to dirt on the filament.
①
Flow nitrogen gas into the vacuum chamber.
②
Using a vacuum gauge such as a diaphragm vacuum gauge, check that the pressure in
the vacuum vessel is 1×10
+5
Pa.
③
Keep it at 1×10
+5
Pa or less for 5minutes or more.
④
Make adjustments.
Summary of Contents for SWU10-U
Page 6: ...SK00 9662 EI 103 00 VI Revision history Date Number Reason 2022 12 14 00 First edition...
Page 34: ...SK00 9662 EI 103 00 27 9 EC DECLARATION OF CONFORMITY...
Page 35: ...SK00 9662 EI 103 00 28 10 UK DECLARATION OF CONFORMITY...
Page 36: ...SK00 9662 EI 103 00 29 11 Certificate of decontamination...
Page 37: ...SK00 9662 EI 103 00 30 12 Drawings 12 1 SWU10 U dimensions...
Page 38: ...SK00 9662 EI 103 00 31 12 2 SWU10 U dimensions...
