V&P Scientific, Inc.
5
Technical Note 104A
OPERATION
1)
Do not use the Speed Control Dial to stop the stirrer. Use the On/Off switch.
2)
Do not operate dry as this will wear out the seal. Always operate with liquid.
3)
The maximum speed is 1,200 RPM and is set at the factory.
a)
Operate at speeds and liquid levels that do not aerosolize the liquid. At lower liquid levels use
slower speeds.
b)
It is best to conduct tests to determine which speed setting is appropriate for the type of solution
and volume being stirred. A short warm-up period (~30 min) is recommended. For most
applications a speed setting of 20 on the control dial is optimum (400 RPM). See chart below of
Speed in RMP versus Speed Control Setting.
A control speed setting higher than 60 does not
increase the RPM speed of the Bubble Paddles but will shorten the motor life and is not
recommended
.
c)
To lengthen the life of the seal
, operate at the lowest possible speed that keeps particles in
suspension. In addition, only operate when necessary, as this will prolong the life of the seal.
d)
At speeds greater than 30 on the Speed Control Dial, runs longer than 6 hours are not
recommended.
