KROHNE CARGOMASTER - Manual (Page 28)

CARGOMASTER®5
Operators Manual - 28
Rem.Vol./Rem. Weight shows remaining free volume/weight capacity in the
tank. The remaining volume is calculated as Maximum Volume (98%) – Actual
Volume
Rest Vol ./ Rest Weight shows remaining capacity according to alarm settings.
When discharging, the Rest Vol. will equal actual volume when Lo Level limit
is less then 6%, in other words using zero level as its reference. When Lo
Level is set and is 6% or more, this level will be the reference
For Loading or seagoing there are several possible ways this can be calculated:
HiHi level alarm is
ON – Hi level is
OFF: Rest Vol. equals the volume for which level the HiHi
level alarm is set to - minus the actual volume.
Hi level is ON and
HiHi is OFF: Rest Vol. equals the volume for which level the Hi
level alarm is set to - minus the actual volume.
If both HiHi and Hi
are OFF: Rest Vol. equals 98.1% volume - minus actual volume
Both HiHi and Hi
level alarms are
ON: Rest volume will be calculated from the HiHi level
value, unless the difference between HiHi and Hi
exceed 4% or more; then the Hi level is used. In other
words; you can use the Hi level alarm to adjust the
calculation of the Rest Vol.
Sample:
You are to discharge 200 tons at a given location. By setting the value “200”
for PART WEIGHT, the column will count down to zero, and you will easily
control how much has been discharged at any time.
Sample 2:
You are to discharge whatever you have in, let’s say tank C1, so that 150 ton
remains for the final destination, and so that you are given an alarm when you
have only the 150 tons left.
Set the group mode to “Discharge” and set up the following columns in the
user layer in ValueTable:
WEIGHT, VOL%, LO LEVEL ALARM, LO ALARM ON/OFF
In the Weight column enter “150” in the field for C1 and watch the % in the
VOL% column. (This value will be overwritten again next time the sensor is
read – you might have to try twice to achieve this) Enter the % value that
appeared in the VOL% field into the Lo Level alarm field and set the alarm
ON.
The alarm should now go off when you have reached the alarm limit – which
corresponds to a weight of 150 tons.
NOTE: The FINISH TIME will not be calculated when using Part Vol./Part Weight