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Installation and Configuration Manual 47
Calibration Check
Calibration Check General MaintenanceUsing 795X Processing Electronics
Figure 6-2 Example calibration certificate for the 7827 digital viscosity meter
example
example
CALIBRATION CERTIFICATE
7827CBANATEABA VISCOMETER SERIAL NO : 271542
CAL DATE : 24JUL08
PRESSURE TEST : 160 Bar
VISCOSITY CALIBRATION @ 20°C (free-stream)
VISCOSITY QUALITY VISCOSITY = V0 + V1.1/Q**2 + V2.1/Q**4
(cP) FACTOR
10.56 249.35 INSTRUMENT CHECK DATA
55.09 115.04
107.68 82.92 AIR POINT (20°C) QUALITY FACTOR =3131
551.13 36.88
1080.73 26.31 VISCOSITY CODE (for 7945V/6V) = 1110
5444.02 13.24
13291.02 8.15
LOW RANGE MEDIUM RANGE HIGH RANGE
(10.56-107.68) (107.68-1080.73)(1080.73-13291.02)
V0 = -1.44494E+00 -2.19511E+00 -5.82240E+02
V1 = 7.45901E+05 7.56108E+05 1.13170E+06
V2 = 3.01107E+07 -4.60362E+06 -1.39730E+07
DENSITY CALIBRATION @ 20°C (free-stream)
DENSITY TIME PERIOD B DENSITY = K0 + K1.TB + K2.TB**2
(kg/m³) (usec)
K0 = -2.52285E+03
0 521.792 K1 = 3.18689E-02
(Air 521.684) K2 = 9.20500E-03
300 552.045
500 571.326 Dt = D( 1 + K18(t-20) ) + K19(t-20)
800 599.090
1000 616.907 K18 = -4.510E-04
1600 667.519 K19 = -1.086E+00
VISCOSITY CORRECTION DATA
Dv = Dt + (K20 + K21.1/Q**2 + K22.1/Q**4)
MEDIUM RANGE HIGH RANGE
K20 = -3.06813E+00 -1.43027E+01
K21 = 1.64128E+04 3.62528E+04
K22 = 4.48316E+06 -1.71568E+06
--------------
where D = Density (uncorrected) | FINAL TEST & |
Dt = Density (temperature corrected) | INSPECTION |
Dv = Density (temp and viscosity corrected) | |
TB = Time period B (uS ) | |
Q = Quality Factor | |
t = Temperature (°C) --------------
Ref No:- LV7827/V6.2 DATE : 30JUL08