Yokogawa RotaMASS 3-Series - Manual (Page 157)

7. pArAMETEr dESCrIpTION
7-85 IM 01R04B04-00E-E 8th edition March 01, 2011 -00 All Rights Reserved. Copyright © 2003, Rota Yokogawa
7.7 density functions (Basic or detailed Setup)
density To set the functions of density measurement.
Notice: Density measurement is only reliable if there is no gas in the
liquid. For liquid measurement a density lower 0.3 kg/l is displayed as
0.0 kg/l. For gas measurement set a fixed density value.
density unit Select:
g/ml, kg/l, kg/m³, lb/gal, lb/Cuft, g/cm³, g/l, °Bé hv, °Bé lt, °ApI
°Bé hv, °Bé lt, °ApI only with option /CST
density format Select: xxxxxxx, xxxxx.X, xxxx.XX, xxx.XXX, xx.XXXX, x.XXXXX
density lrv
(low range value) Set a density value to the 4 mA or 0 Hz.
density Urv
(upper range value) Set a density value to the 20 mA or xxxxx Hz.
Abs(URV-LRV) ≥ 0.05 kg/l
density damping damping Set the damping time in s. Damping time affects outputs and display.
After 5 times damping time the given value is displayed (t=63%)
density lowcut lowcut Set the low cut. Low cut affects outputs and display.
density alm 1 sel alm 1 sel Select: No function, More than, less than
density alm 1 crit alm 1 crit Select a density alarm level. What happens in case of an alarm has to
be defined in Status out (7.12, 7.13).
density alm 2 sel alm 2 sel Select: No function, More than, less than
density alm 2 crit alm 2 crit
Restrictions:
All alarms have to be in 0-110%
of URV-LRV
Alarm criteria 2 must always be
larger than alarm criteria 1.
Select a density alarm level. What happens in case of an alarm has to
be defined in Status out (7.12, 7.13).
density fix val sel Select: Inhibit, Enable
reference density Select a density value. For gas measurement (option /GA) set here
your actual density for output of volume flow. For output of standard or
normal volume flow set the standard or normal density of your gas
accordingly. For liquid measurement this parameter can also be used to
enter the standard density of your liquid for output of standard volume
flow or for the actual density in case of density disturbances.
density offset If the Rotamass detector is installed horizontally (bend down) the value
from the following table must be entered according to the concerning
sensor model.
RCCS30 13.50 g/l
RCCS31 1.80 g/l
RCCS32 2.00 g/l
RCCS33 0.60 g/l
RCCx34 0.90 g/l
RCCx36 0.35 g/l
RCCx38 to 39/XR 0 g/l (default)
pressure Set the average static line pressure.
Static pressure effect on density and mass flow will be corrected auto-
matically.
pressure unit Select: bar, psi, Mpa
ROTAMASS is density-calibrated vertically. If the ROTAMASS detector is installed horizontal an density
offset value from the above table has to be entered to the parameter reference density. As positive values if
the tubes are down and as negative value if the tubes are up..