WHEATON UniSpense
®
PRO Peristaltic Pump
WHEATON | 800.225.1437 (U.S. & Canada Only) | 856.825.1100 | www.wheatonsci.com| P/N 50099073 Rev. 2/2/10 Lit. No.8734
17
13.0 Tips on Obtaining Maximum Accuracy
Several operating variables must be considered in obtaining maximum dispense accuracy, such as tubing
sizes, and pump speed. In addition other variables such as tubing characteristics (material, age, chemical
compatibility) and pumped – medium characteristics (viscosity, chemical makeup, temperature) must also
be considered in obtaining best dispensing results.
Proper Tubing Selection
Each different tubing size will provide a different liquid delivery range when used in conjunction with the
pump unit. Accuracy is increased as the number of pump head revolutions required per dispense is
increased. Tubing size should be selected so the pump head makes at least 3 complete revolutions.
14.0 Maintenance and Troubleshooting
DANGER! NEVER ATTEMPT TO PERFORM REPAIRS IF THIS INSTRUMENT IS
PLUGGED IN! TO AVOID SERIOUS ELECTRIC SHOCK OR ELECTROCUTION, THIS
INSTRUMENT MUST BE DISCONNECTED FROM THE SOURCE OF AC POWER
BEFORE REMOVAL OF ANY PROTECTIVE COVERS.
14.1 Maintenance
Routine user maintenance should include a regular inspection of the tubing assembly for excessive wear
and leaks. Many service problems can often be cured by simply replacing a worn tubing assembly. To
insure high accuracy, the pump rotor and tubing clamping mechanics of the pump head should be kept as
clean as possible at all times.
The unit cabinetry has been designed to an IP31 rating. The plastic top is mineral filled polypropylene and
the base is painted cast aluminum. The pump head and outer cabinet may be wiped down with warm
water and any mild household cleaning solution. Never use abrasive cleaners or strong acids as cleaning
solutions. Never place liquid containers on top of the UniSpense
®
PRO, as a spill could result in liquid
entering the dispenser. If liquid should accidentally contact the front panel, the unit should be
disconnected from the AC power source immediately and carefully dried with towels and warm air.
Although the UniSpense
®
PRO is designed for easy service, it is highly recommended that the instrument
be returned to WHEATON Industries should any major repairs be needed.
Pump rollers can be occasionally lubricated with Teflon lubricating oil.
14.2 Troubleshooting – For Qualified Maintenance Personnel Only!
DANGER! NEVER ATTEMPT TO PERFORM REPAIRS IF THIS INSTRUMENT IS
PLUGGED IN ! TO AVOID SERIOUS ELECTRIC SHOCK OR ELECTROCUTION, THIS
INSTRUMENT MUST BE DISCONNECTED FROM THE SOURCE OF AC POWER
BEFORE REMOVAL OF ANY PROTECTIVE COVERS.