Level Monitor
1-1
Thermo Scientific
Section 1
Introduction and Safety
Information
The Level Monitor Unit monitors the water level of storage tanks to assure
efficient and trouble-free operation.The unit offered can operate either as a
direct-acting or reverse-acting unit. The direct-acting unit is normally used
to start the tank refilling procedure and to control the tank upper water
level to protect the tank from over-filling. The reverse-acting unit is
normally used to monitor the lower water level and to stop auxiliary
equipment, such as a pump, to protect it against damage due to low water
level conditions in the storage tank.
The Level Monitor Unit consists of a controller/indicator and a U-tube
assembly. The controller/indicator contains; a pressure plate mounted
electrical switch; electrical contacts and associated wiring. The U-tube
Assembly connects to the diaphragm housing and is used to mount the
level monitor on the storage tank.
Functionally the Level Monitor operates as a pressure controlled electrical
switch which changes state on rising water head pressure.
This manual contains important operating and safety information. The
user must carefully read and understand the contents of this manual prior
to the use of this equipment.
Your Level Monitor has been designed with function, reliability, and safety
in mind. It is your responsibility to install it in conformance with local
electrical codes. For safe operation, pay attention to Notes, Cautions, and
Warnings throughout the manual.
Warnings
To avoid electrical shock, always:
1. Use a properly grounded electrical outlet of correct voltage and current
handling capacity.
2. Disconnect from the power supply prior to maintenance and servicing.
To avoid personal injury:
1. Do not use in the presence of flammable or combustible materials; fire
or explosion may result. This device contains components which may
ignite such materials.
2. Refer servicing to qualified personnel.
All references indicate sections from the enclosed operating manual on CD.
