Bronkhorst®
Instruction Manual mini CORI-FLOW ML120
9.17.097G
52
The following digital parameters are involved in choosing the required dosing method:
Name
Process/
Parameter
Modbus
Register no
Value
Purpose/Remarks
Capacity Unit (129)
1/31
33273…
33276
as required select measuring unit
(see
fluid set parameters
for available measuring units)
Density (170)
33/21
41385…
41386
as required fluid density used to calculate volume flow from mass flow:
·
for liquid dosing, use theoretical fluid density
·
for volume based gas dosing, use fluid density at normal (0 °C, 1
atm) or standard conditions (20 °C, 1 atm)
5.3.2
Batch settings
When configuring the instrument for batch dosing, always set
New setpoint on limit
to 0. With any other value the
media flow will not stop after reaching the configured batch size. In that case, dosing can only be stopped by disabling the
counter (
Counter Mode
= Off) and changing the main setpoint to 0.
The counter function of the instrument is used to configure
the actual batch parameters. In FlowPlot, these settings are
done on the
Alarm & Count
tab of the
Instrument Settings
function:
1. For batch dosing, set the counter to totalize the measured
flow rate, until the required batch size is reached (Up to
limit)
2. The counter limit defines the required batch size (note that
the selectable counter units automatically match the
capacity unit type that was selected by choosing the
dosing method)
3. By changing the new setpoint to 0 (zero) on reaching the
counter limit, the flow is stopped when the configured
batch size is delivered
4. A new batch can be started by resetting the counter by
means of (one of) the configured batch trigger(s)
When testing batch settings in FlowPlot, follow these steps:
·
Set the setpoint to 0% (group
Setpoint controller
, see image)
·
Click the
Reset counter
button
·
Start the first batch by changing the setpoint to 100%
·
Wait until the configured counter limit is reached (red
indicator in the bottom of the
Counter
group)
·
Click
Reset counter
to start a new batch
