Operations manual AQUASTOP
®
II
10
4.
Operating mode description
This unit monitors continuously the cooling water
flow and –temperature of any critical laboratory
equipment operating without surveillance and helps
preventing damages caused by unsufficiant cooling
action. It can easily be mounted on already existing
installations.
Cooling water admission is controlled by an solenoid
valve fitted onto a normal water tap. The combined
flow meter / temperature sensor is fitted in the coo-
ling water line downstream of the equipment to be
monitored. In case the critical process temperature
to be monitored must be measured elsewhere in the
installation, an external Pt100 sensor can be con-
nected. This sensor needs then to be placed direct-
ly on the spot to be surveyed. Connection of an
external temperature sensor automatically discon-
nects the integrated temperature sensor in the flow-
meter.
The heating of the installation or equipment, e.g. a
bath or heating plate, can directly be fed from the
socket on the backside of the AQUASTOP® II. This
protects the installation against damages caused by
lack of cooling water, e.g. by a leaky water hose or
tube, and also in case of other unacceptable tempe-
rature increase, inside the cooling water or else-
where in the process.
A floating contact (230V/1A) is available for external
alarms. AQUASTOP® II is further equipped with a
RS232 serial data interface which allows easy docu-
mentation of measured values on a connected PC.
