User`s guide

RA MP PROF ILE
The Ramp Rate profile is used to create a linearly increasing or decreasing flow rate for a single pumping
mode (infuse or withdraw) over the course of a defined time period.
Figure 48: Ramp Rate Pump Operation Profile.
When creating or editing a Ramp Rate profile, you will define three primary operating parameters:
• The Flow Mode defining the direction of flow: infuse or withdrawl
• The Flow Rate at the beginning and end of the pumping cycle
• The Target Time that determines the total length of time over which the ramp will be calculated
During a Ramp Rate profile, the PHD ULTRA
™
varies the flow rate linearly between the starting rate and
ending rate over the full time period entered. A Ramp Rate profile can be applied to an increasing or
decreasing rate application.
When creating or editing a Ramp Rate profile, you can set the rate in ml, µl, nl or pl units of volume using
sec or h:m:s (hours:minutes:seconds) 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 Infuse and Withdraw Rate screens.
TO SET UP/EDIT A RAMP RATE PROFILE:
1. From the Step Definition screen for a Ramp Rate profile, choose the Set Mode button to toggle the
Flow Mode between Infuse and Withdraw operation.
Figure 49: Step Definition screen for a Ramp Rate profile.
2. Choose the Set Start & End Rate button to enter the Set Start & End Rates screen.
Flow
Rate
Time
S
TOP
T
arget Time
Harvard Apparatus PHD ULTRA
™
Syringe Pump Series User's Manual
Publication 5419-002-Rev-A
55
U
sing The PHD ULTRA™