KD Scientific Allegro Peristaltic Pump Series - Manual (Page 42)

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KD Scientific Allegro Peristaltic Pump System User’s Manual
Publication 5613-004-REV-A
Operating the KDS Allegro Peristaltic Pump System
Flow
Rate
Time
STOP
Target Time
Ramp Profile
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.
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:
forward or reverse
• 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 KDS Allegro Peristaltic
Pump System 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 L, 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 tubing selected or custom-defined.
The min/max values are made available as button selection
options on the Rate screen.
TO SET UP/EDIT A RAMP RATE PROFILE:
1. From the Step Definition screen for a Ramp Rate
profile, choose the Direction button to toggle the
Flow Mode between Forward and Reverse operation.
2. Choose the Set Start & End Rate button to enter
the Set Start & End Rates screen.
3. Select the Start Rate button (it should be selected
by default as indicated by the active data entry
box to the right of the button). Enter the flow rate
value desired using the keypad or select the
Minimum Rate or Maximum Rate button.
4. If the Units of Rate are not correct for your
application, choose the Units button.
5. On the Units Selection screen, select the unit
of measure (L, ml, µl or nl) and the unit of time
(sec, min, hr) as appropriate, then
choose to confirm your selections.
6. Repeat Steps 3 to 5 for the End Rate by selecting
the End Rate button and continuing data entry.
7. When all parameters are correctly set on the
Set Rate screen, choose to confirm your
settings and return to Ramp Definition screen.
8. Choose the Time button to enter the Set Time screen.
9. Enter the desired Time value using the keypad.
10. If the Units of Time are not correct for your
application, select the Units button to toggle
between sec (seconds) and h:m:s
(hours:minutes:seconds). To use the h:m:s option,
enter your time value in hours, minutes and
seconds, separating each value with a colon.
11. When all parameters are correctly set on the Set
Target Time screen, choose Accept to confirm your
settings and return to the Ramp Definition screen.
12. Choose Accept again to return to the Step
Definition screen.
‘ENTR’
‘ENTR’
Step Definition screen for a Ramp Rate profile
Set Start and End Rates screen
✐
NOTE: Ramps < 2 seconds from min to
max rates may cause motor stalls.