Emerson Series 3000 MVD Manuel D’Utilisation
156
Micro Motion
®
Series 3000 MVD Transmitters and Controllers
Operation Mode – Batch
Example 1
Batch control configuration:
•
No. of Stages = 2
•
Configure Presets By = % of Target
Preset configuration:
•
Target = 100 liters
•
Open Primary = 0%
•
m (Open Secondary) = 30%
•
n (Close Primary) = 70%
Operator actions:
•
None (see the first sequence in Figure 18-5)
As a result:
•
At the beginning of the batch run, the primary valve opens and flow
starts.
starts.
•
When the flowmeter has measured 30 liters, the secondary valve
opens.
opens.
•
When the flowmeter has measured 70 liters, the primary valve
closes.
closes.
•
When the flowmeter has measured 100 liters, the secondary valve
closes.
closes.
Example 2
Batch control configuration:
•
No. of Stages = 2
•
Configure Presets By = % of Target
Preset configuration:
•
Target = 100 liters
•
Open Primary = 0%
•
m (Open Secondary) = 30%
•
n (Close Primary) = 70%
Operator actions:
•
STOP/RESUME occurred after 20 liters had been measured (20%
of target; x = 20%) (see the second sequence in Figure 18-5)
of target; x = 20%) (see the second sequence in Figure 18-5)
As a result:
•
At the beginning of the batch run, the primary valve opens and flow
starts.
starts.
•
When the flowmeter has measured 50 liters (30 + 20, or m + x), the
secondary valve opens.
secondary valve opens.
•
When the flowmeter has measured 70 liters, the primary valve
closes.
closes.
•
When the flowmeter has measured 100 liters, the secondary valve
closes.
closes.