User`s guide

PU LSE PRO FILE

The Pulse Rate profile is used to create an oscillating infusion or withdrawal profile that varies between a

starting flow rate and a second rate that can be either or higher or lower than the start rate. The flow rate is

constant within each segment of the pulsed flow profile and the user defines the total number of

repetitions (pulses) for the oscillating pattern. Each segment of the profile must be set to run for either a

specific length of time or to deliver a set volume.

Figure 53: Pulse Rate Pump Operation Profile.

When creating or editing a Pulse Rate profile, you will define four primary operating parameters:

• The Flow Mode defining the direction of flow: infuse or withdraw

• The Flow Rate to be used at each level of the pulsed profile within the pumping cycle

• The length of Time that each segment of the profile will run or the specific Volume to be

infused/withdrawn during each segment of the profile

• The Number of Pulses (repetitions) that will be executed during the pumping cycle

During a Pulse Rate profile, the PHD ULTRA

™

calculates a series of equal length pumping stages at two

user-defined flow rates: a starting rate and a “pulse” rate. You enter the Number of Pulses (repetitions) that

you want to use, along with how you want the system to calculate the length of each stage — by time or

by volume pumped. A Pulse Rate profile can be applied to pulses that are higher in rate or lower in rate

than the starting flow rate.

When creating or editing a Pulse Rate profile, you can set the rate in ml, µl, nl or pl units of volume using

sec, min or hr as the units of time. The system automatically calculates a minimum and maximum flow rate

based on the syringe selected or custom-defined. The min/max values are made available as button

selection options on the Set Pulse Rates screens.

Figure 54: Step Definition screen for a Pulse Profile with Volume mode selected.

Volume

Time | Volume

# Pulses

Harvard Apparatus PHD ULTRA

™

Syringe Pump Series User's Manual

Publication 5419-002-Rev-A

sing The PHD ULTRA™