Operating Instructions - CPC6050 111
Modular Pressure Controller
CPC6050
8.4.3 Emulation Mode Accuracy
The accuracy in emulation mode is dierent for gauge and absolute emulation mode.
The barometric reference has six signicant digits and has a guaranteed drift of 0.0000041 psi over a 24
hour period which has no signicant eect on the emulated gauge pressure uncertainty.
The absolute uncertainty of the barometric reference must be considered in the emulated absolute pres-
sure uncertainty.
8.4.4 Barometric Reference Calibration
The Barometric Reference Transducer can be calibrated in exactly the same manner as the other
installed transducers as described in Section 10, Calibration.
8.4.5 BarometricReferenceSpecications
Accuracy: 0.01% of reading. Uncertainties include all pressure eects and temperature eects over the
calibrated range and calibration stability for 365 days after re-zeroing.
Pressure Range: The standard Barometric Reference Transducer is calibrated from 8 to 17 psia.
Resolution: 6 digits
8.5 Additional Transducers (CPR6050)
A secondary transducer of any standard range, can be purchased as an option. In all other regards, the
add-on transducer will meet all of the specications and operating parameters outlines throughout this
manual.
CAUTION: Typically, the pressure regulator in each instrument has limits of 50,
150, 1500 or 3,045 psig. If a transducer is placed into an instrument where the
transducer has a higher upper pressure range than the instrument’s regulator, the
maximum control limit will be limited to the maximum range of the instrument’s
regulator.
While any transducer will function in any instrument, the results may not always be optimum. For exam-
ple, if a 1 psi transducer is placed in an instrument that has a 1500 psi upper limit, the controlled pressure
stability may not be acceptable. Or if a 1500 psi transducer is placed in an instrument that has a 30 psi
upper limit, it will control very well, but be limited in resolution.
8.5.1 Secondary Transducer Installation
If the add-on transducer is of a higher full scale range than the existing primary transducer, then this
newer transducer becomes the Primary, and the existing transducer must be moved to the Secondary
Transducer slot. For complete installation instructions see Section 9.3 ,Transducer Removal.
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Caution
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