WHEATON
®
OmniSpense
®
ELITE Peristaltic Pump
WHEATON | 800.225.1437 (U.S. & Canada Only) | 856.825.1100 |
www.wheaton.com
| P/N 50099067 Rev. 5/15/12 WMAN_001
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Example B:
Dispense is so short that the pump prematurely terminates ramping cycle because the
dispense volume was too small for the unit to reach the proper set speed.
Remedy:
At this point, selecting a smaller tubing size to increase number of pump head revolutions vs.
volume is the only option.
Applying a ramp rate to a dispense cycle, effectively slows the pumphead / dispensed liquid inertia, which
will increase accuracy. For highest accuracy, ramp rates should be set to as long as can be tolerated, as
a long ramp rate will naturally lengthen the dispense cycle time.
15.3 Using Multiple Pump Heads
Successful use of multiple pump heads depends on several factors including unit settings, tubing size and
wall weight, and liquid viscosity. Adding a small startup ramp rate to the process can improve unit
performance with multiple pump heads over starting the process with no ramp. Use the chart below as a
guide in selecting multiple pump heads and tubing sizes.
16.0
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.