Ps Calibration - Laversab 6300 User Manual

6.3 Ps (Static) CALIBRATION:
Step 1. Connect the output of the Pressure Standard to the Static port on the 6300. The
pressure and vacuum sources are to be connected to the Pressure Standard and it is assumed
that the Pressure Standard has a suitable control mechanism which can allow the user to
control the pressure at its output.
Step 2. Turn on the 6300 and allow it to warm up for about 30 minutes. Change the units to
"PsinHg" on the Static side and "PtinHg" on the Pitot side. Refer to section 3.2.3 on how to
change units. During the warm-up period, purge the system with Dry Air by cycling the
pressure at the Static port between 38 inHg absolute and 1 inHg absolute (or lower), at least
three times. Also, ensure that there are no leaks in the system
Step 3. After the warm-up period is over, using the Pressure Standard, generate a pressure of
1.000 inHg absolute. Allow the pressure to be stable at 1.000 inHg for 2 minutes and take the
reading on the Static side (PsinHg) of the 6300. This is the first of your "Before" calibration
adjustment reading. It will indicate the zero drift since the previous calibration.
Note: If your Standard cannot generate 1.000 inHg abs., the lowest possible pressure below
4.000 inHg abs. will be acceptable.
Step 4. Generate a pressure of 38.000 inHg absolute, allow the pressure to stabilize for 2
minutes and take the reading on the Static side (PsinHg) of the 6300. This is the second of
your "Before" calibration adjustment reading. It will indicate the zero plus slope drift since
the previous calibration. Leave the pressure at 38.000 inHg while you perform the next step.
Note: If your Standard cannot generate 38.000 inHg abs., any pressure between 32.000 and
38.000 inHg abs. will be acceptable.
If you do not wish to make a calibration adjustment, but just want to verify the accuracy of the
6300, please skip to Step 10.
Step 5. To make a calibration adjustment for the Static port, on the 6300, move to the the
CALIBRATION screen using the NEXT SCREEN key and enter the password. The calibration
screen appears as follows:
Vacuum:
F.S. :
CALIBRATION
Pt inHg
1. ________
2. ________
Ps inHg
3. ________
4. ________
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