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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.
Flow
Rate
Time
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 withdraw
• 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 Legato 100 Series
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 Direction button to toggle the
Flow Mode between Infuse and Withdraw operation.
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Operating the KDS Legato 100 Series
2. Choose the Set
Target Time
STOP
3. Select the
4. If the Units of Rate are not correct for your
5. On the Units Selection screen, select the unit
6. Repeat Steps 3 to 5 for the End Rate by selecting
7. When all parameters are correctly set on the
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
11. When all parameters are correctly set on the Set
12. Choose Accept again to return to the Step
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Start & End Rate
button to enter
the Set Start & End Rates screen.
Set Start and End Rates screen
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
application, choose the
Units
button.
of measure (ml, µl, nl or pl) and the unit of time
(sec, min, hr) as appropriate, then
choose
to confirm your selections.
'ENTR'
the
End Rate
button and continuing data entry.
Set Rate screen, choose
to confirm your
'ENTR'
settings and return to Ramp Definition screen.
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.
Target Time screen, choose Accept to confirm your
settings and return to the Ramp Definition screen.
Definition screen.
NOTE: Ramps < 2 seconds from min to
max rates may cause motor stalls.
KD Scientific Legato 100 Series Syringe Pump User's Manual
40
button.
Publication 5617-006-REV-2.0
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