Pt Calibration - Laversab 6300 User Manual

Step 6. Ensure that the pressure generated by the Standard on the Static port is still 38.000
inHg. Select item '4' using the keypad on the remote unit and then enter the value 38.000 in
item 4. This indicates the full scale point for the calibration. If you make an error while
entering data, press "CLR". Do not press "CANCEL". You may re-enter the value any
number of times.
Note: If your Standard cannot generate 38.000 inHg abs., any pressure between 32.000 and
38.000 inHg abs. will be acceptable. Enter the value of the generated pressure.
Step 7. Now generate a pressure of 1.000 inHg with the Standard. Allow the pressure to
stabilize for 2 minutes, select item '3' using the keypad on the remote unit and then enter the
value 1.000 in item 3. This indicates the vacuum point for the calibration. If you make an error
while entering data, press "CLR". Do not press "CANCEL". You may re-enter the value any
number of times.
Note: If your Standard cannot generate 1.000 inHg abs., the lowest possible pressure below
4.000 inHg abs. will be acceptable. Enter the value of the generated pressure.
Step 8. On the keypad of the remote unit, press "PREV SCREEN". The display will return to
the Main Screen. If you press "CANCEL" the calibration adjustment will become void.
Step 9. Turn the 6300 OFF, wait 30 seconds and then turn it back ON. The calibration
adjustment is now complete for the Static port.
Step 10. Verify the calibration by generating pressures in approximately 10% increments and
noting the 6300 Static port (PsinHg) readings. Your calibration sheet will appear as shown in
Figure 6.1.
6.4 Pt (Pitot) CALIBRATION:
Step 1. Connect the output of the Pressure Standard to the Pitot 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 Pitot port between 60 inHg absolute and 1 inHg absolute (or lower), at least
three times. Also, ensure that there are no leaks in the system
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