Physitemp Instruments BFS - Manual (Page 2)

APPENDIX I
OPERATING INSTRUCTIONS FOR PHYSITEMP PUMP AND TANK UNIT, PTU-3
1. Unscrew cap. Fill reservoir with 5 gallons of distilled water.
2. Connect extension tubing to the freezing stage tubes and the connections on the tank. Direction of
the flow is not important. All water fittings are automatically self-sealing when disconnected to prevent
water spills.
3.
Connect the AC line cord to the receptacle on the pump and to the outlet on rear of the power sup-
ply. This ensures that the water is always flowing when the power supply is on.
4.
Switch on the power supply.
GENERAL INSTRUCTIONS
The use of distilled water is recommended. This avoids discoloration of the tubing due to organic matter in
untreated water. A purification agent can be added to the water. Any commercially available dehumidifier
treatment in liquid, powder or tablet form may be used.
If the stage will be operated for long periods, water temperature may gradually increase. Ice cubes can be
added to the tank to maintain low temperature.
The tank should not be placed more than three feet below the stage itself.
When filling the reservoir for the first time, or when refilling it, a small amount of air may become trapped
in the pump housing and cause intermittent noise, cavitation and a reduced flow rate. If this occurs, screw
the cap firmly onto the tank and tip it an an angle of approximately 45 degrees to the horizontal in all four
directions as shown below. This will eliminate the air in the pump housing and restore flow to its maximum.
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