Yokogawa RotaMASS 3-Series - Manual (Page 55)

8. GENErAL SPECIFICATIONS
8-1 IM 01R04B05-00E-E 3rd edition July 30, 2010 -00 all Rights Reserved. Copyright © 2005, Rota Yokogawa
8. GENErAL SPECIFICATIONS
Qnom is the water flow rate at about 1 bar pressure drop.
the flowmeter has an automatically low cut at 0.05% of
Qnom.
accuracy mass flow :
Liquid : ± 0.1% of flow rate
± zero stability / flow rate *100%
(refer to table 2)
Gas (option /Ga) : ± 0.5% of flow rate
± zero stability / flow rate *100%
(refer to table 2)
accuracy volume flow :
SQRt ( (mass flow error in %)² + (density error in %)²)
Please refer to sizing.
accuracy based on the frequency output includes the com-
bined effects of repeatability, linearity and hysteresis.
Repeatability for liquids: ± 0.05%
± (zero stability/2) / flow rate
*100%
Batch process : above specified accuracy if the
batch process is >1 minute. For
shorter batch time (dt in s) the
accuracy decreases with the
square root of 60/dt
PErFOrMANCE SPECIFICATIONS
Model
- Remote detector RCCS30 to 33: 2 tubes, low flow design
- Remote detector RCCS34 to 39/XR : 2 tube design
- Remote field-mount converter RCCF31
- Integral type RCCt34 to 39/XR: 2 tube integral design
Fluid to be measured : Liquid, gas or slurries
Measurement items : Mass flow, density, temperature
and derived from these values:
concentration, volume flow and
net flow
Mass flow measurement
table 1: measuring range
Type rCCS30 rCCS31 rCCS32 rCCS33
Qmax t/h 0.1 0.3 0.6 1.5
Qnom t/h 0.045 0.17 0.37 0.9
Type rCCx34 rCCx36 rCCx38 rCCx39
rCCx39
/Ir
rCCx39
/Xr
Qmax t/h 5 17 50 170 300 600
Qnom t/h 2.7 10 32 100 250 500
table 2 : Zero Stability
Type rCCS30 rCCS31 rCCS32 rCCS33
kg/h
0.005 0.0085 0.019 0.045
Type rCCx34 rCCx36 rCCx38 rCCx39
rCCx39
/Ir
rCCx39
/Xr
kg/h 0.135 0.5 1.6 5 13 25
Pressure dependency
the stiffness of the RotaMaSS tubes is slightly line pressure
dependent. the static pressure effect of mass flow and den-
sity can be corrected by setting the static pressure manually via
menu.
table 3 : Static pressure effect on mass flow (not corrected)
Type rCCS30 rCCS31 rCCS32 rCCS33 rCCx34
% of
rate
per bar SS ---- ---- ---- ---- 0.00081
HC 0.00000 0.00012 0.00246 0.02094 0.00084
Type rCCx36 rCCx38 rCCx39
rCCx39
/Ir
rCCx39
/Xr
% of
rate
per bar SS 0.00346 0.00950 0.01058 0.02920 0.00740
HC 0.00336 0.00896 0.00808 0.01780 ----
density measurement
adjustment with water and air at calibration temperature.
With option /K4 thermal stabilized.
For option /K6 see also “Special calibrations” on page 3.
Measuring range : 0.3 kg/l to 5 kg/l (RCCx39,
RCCx39/IR and RCCx39/XR to 2 kg/l)
no density measurement for gas application
table 4: accuracy (at calibration conditions):
Type Standard Option /K4 Option /K6
RCCS30 0.008 g/cm³ ------ ------
RCCS31 0.004 g/cm³ 0.001 g/cm³ ------
RCCS32 0.004 g/cm³ 0.001 g/cm³ 0.0005 g/cm³
RCCS33 0.004 g/cm³ 0.001 g/cm³ 0.0005 g/cm³
RCCx34 0.003 g/cm³ 0.001 g/cm³ 0.0005 g/cm³
RCCx36 0.0022 g/cm³ 0.001 g/cm³ 0.0005 g/cm³
RCCx38 0.0015 g/cm³ 0.001 g/cm³ 0.0005 g/cm³
RCCx39 0.0015 g/cm³ 0.001 g/cm³ 0.0005 g/cm³
RCCx39/IR 0.0015 g/cm³ ------ ------
RCCx39/XR 0.0015 g/cm³ ------ ------
Repeatability:
- RCCS32-33, RCCx34-39/XR : ± 0.0005 g/cm³ (Std, /K4)
Static pressure effect:
Compensated if static pressure is set in the menu
Installation:
vertical, else correction term must be set in the software
Specification of high performance density measurement (option /K6):
ambient temp. range : -10°C to 50°C
Fluid temp. range : -50°C to 150°C
Minimum flow rate for specified accuracy:
- RCCx36 to RCCx39 : 700 kg/h
- RCCx34 : 140 kg/h
- RCCS33 : 90 kg/h
- RCCS32 : 37 kg/h
Maximum flow rate : Qnom
Repeatability : ± 0.0002 g/cm³
temperature measurement: ±0.5°C ±0.2% of reading
Density accuracy : ±0.0005 g/cm³ (liquids not aerated /
no gas in the liquid)
Process temperature influence :
0.000015 g/cm³ * abs(tfluid-20°C)
-1.0
-0.9
-0.8
-0.7
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0 50 100 150
Flow in % of Qnom
Er
ro
r i
n
%
F10.EPS