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Chapter 11 Configuring by using the menus
Page 11.4
78123A GAS DENSITY METER
SERIAL NO
CYLINDER NO
AMPLIFIER NO
CALIBRATION DATE
: nnnnnn
:
:
:
DENSITY CALIBRATION FOR NITROGEN AT 20 DEG C
(Based on Pressure-Temperature-Density Data in IUPAC tables)
O
DENSITY
[KG/M3]
PERIODIC TIME
[uS]
n nnn.nnn
USER GAS OFFSET DATA
Argon/Methane gas mixture over density range 60 to 200 KG/M3
DENSITY = K0 + K1.T + K2.T**2
K0 =
K1 =
K2 =
-n.nnnnnE+nn
-n.nnnnnE-nn
n.nnnnnE-nn
TEMPERATURE COEFFICIENT DATA
Dt = DI(1 + K18(t-20)) + K19(t-20)
K18 =
K19 =
-n.nnnE-nn
n.nnnE-nn
where
T = Periodic time (uS)
DA = Actual Density (KG/M3)
t = Temperature (DEG.C)
DI = Indicated Density (KG/M3)
Dt = Temp. Corrected Density (KG/M3)
QC
Ref No:- xxnnnn/Vn.n
DATE : xxxxxxx
S
solartron
S
PRESSURE TESTED TO 375 BAR
nn nnn.nnn
nn nnn.nnn
nn nnn.nnn
nnn nnn.nnn
nnn nnn.nnn
nnn nnn.nnn
nnn nnn.nnn
nnn nnn.nnn
nnn nnn.nnn
(K3( G))
DA = Dt (1 + ------- (0.00236 - --- --))
( (Dt+K4) ( t+273))
K3 = nnn
K4 = nnn.n
TESTER
Gas Specific Gravity
G = -----------------------
Ratio of Specific Heats
Figure 11.1 An example of a Calibration Certificate for a 7812 gas density transducer