6300 Rev H User’s Manual
125-9106A Page 63
SECTION 6 : CALIBRATION
6.1 EQUIPMENT
This calibration procedure requires the following equipment:
1. Vacuum pump for Pressure Standard
2. Pressure supply of clean, Dry air (dew-point below -10
o
C) at 25 psig, for Pressure Standard
3. Pressure standard with two independently controlled outputs as follows:
a. Output-1 should be able to generate differential pressures (with respect to Output-2)
between 0 and 30 inHg, with an accuracy of at least 0.002 inHg.
b. Output-2 should be able to generate absolute pressures between 1.6 and 32 inHg, with
an accuracy of at least 0.002 inHg.
6.2 6300 TRANSDUCERS
Pitot Transducer
The Pitot output of the 6300 has a differential transducer with a range of 0 to 30 inHg differential. The
differential pressure is measured with the pressure at the Static output as the reference. This transducer must
be calibrated at 0 inHg differential and 30 inHg differential (with respect to Static). The accuracy of this
transducer is ± 0.003 inHg.
Caution: The pressure applied to the Pitot output of the 6300 must never be less than the pressure on the
Static output. If the Pitot pressure is such that the Qc inHg (differential with respect to Static) is more
negative than -0.05 QcinHg, an internal relief-valve will open and equalize Pitot and Static pressures.
Static Transducer
The Static output of the 6300 has an absolute transducer with a range of 1 to 32 inHg absolute. This
transducer must be calibrated at 1.6 inHg and 32 inHg. The accuracy of this transducer is ± 0.002 inHg.
6.3 SETUP OF 6300
To perform a calibration press FUNC and then select ‘8’. However, before selecting the calibration
function it is necessary to set Pitot units to ‘QcinHg’ and the Static units to ‘inHg’. Also, both outputs
must be in Measure mode. If this is not set up correctly and Function ‘8’ is selected, the following screen
will appear.
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