paraffin wax deposition and fouling

The pressure transducer was calibrated using a deadweight pressure
A3.2 Pressure transducer calibration
—.4-
A3..i Introduction
TOULING STUD S APP.’TUS
PPEDIX 3 IlTiEl’r CLIB’TT0DS F3
Instrument calibratIons for the fouling studies apparatus were
poi. Cu .r. .
given bj:
orifice were found by regression where the flowra W in lb/in.. was
these results the calibration constant C.. and. xi for cash
pressure crop across tae orfce meters p was neasurea n cm ag.
dcharges over given time intervals at different fiowrates. The
The cooling water orifice meters were calibrated by weighing the
Calira;on of orifice reters
nanufacturer’s test results are shown in Table A3.2.
constant of 20.0 could be applied to convert the mV to p.s.i.g. The
over its operating range of 0—200 p.s.i.g. and that a calibration
The results showed that the transducer gave consistent readings
transaucer output was measure on tac recorer an the poten;ome;er.
small increments to 200 p.s.i.g. and cack again. After eacti step tac
Starting rom zero p.s.i.g. the appliea pressure was increasea in
of zero aV.
200 p.s.i.g. gave an output of 10 n1V and zero p.s.i.g. gave an output
tLe associated iF—00 conc.itionng module, so an applied Pressure of
First, the zero span of the transducer output was adjustea u$ng
Series 27000 recorder, which was used in the experimental work.
by W.G. Pye & Co. Ltd. The transducer output was recorded on a ryans
meter in conjunction with a Scanlamp Type 78915 galvanometer, both supplied
tostr. The transducer output was measured with a Type 7565 Potentio—
— A1+ —
W
=
C