Boumatic TouchPoint - Principle of Operation

SmartControl™ Meter & TouchPoint™ 47 9E-926
Operation Instructions
Conductivity probes are molded into the base. A hollow stem
extends upward along the center axis of the measuring cham-
ber. This stem houses the level sensing probe assembly which
is precisely positioned to determine the level of milk in the
measuring chamber.
A port in the side wall is provided for mounting a sampler.
When a sampler is not used the sampler plug must be in the
port.
4.1.2 Principle of Operation
The milk meter is a time to ll type meter. The milk level in the
measuring chamber is monitored by the position of the oat.
When the milk level reaches the upper point during milking
the oat causes the level sensing probe to signal the control
that the chamber is full. The control then activates a vacuum
solenoid valve which admits vacuum to the diaphragm, cancel-
ing the effect of the meter’s vacuum. This allows the spring to
raise the plunger and drain the chamber. The chamber remains
open for a short period of time and then the plunger lowers
(when the vacuum solenoid is switched off, admitting air to the
diaphragm) allowing the next portion of milk to be measured.
The meter continues in this fashion, holding, measuring, then
releasing milk, until the ow rate falls below the threshold for
detaching. Upon Detach, any remaining milk empties. If the
sampler is attached to the meter, a small portion of the milk
automatically diverts into the sampler jar with each cycle. The
rate at which the milk cycles through the meter is monitored
and this information is used as part of the detach logic.