TriContinent C24000, Product Manual

Page: 127 / 144

Calculating flow rates
C-Series Product Manual
127
Calculating flow rates
In syringe pump applications, flow rate is defined as the amount of fluid
being dispensed in a given time frame (total syringe volume divided by
dispense speed). Typically, this is in microliters per second (
µL
/sec).
However, depending on the application it could also be stated using a
different volume, such as milliliter (mL) or in time (minutes, hours, etc).
While you may or may not ever want to calculate precise flow rates,
knowing the ranges of flow rates for each of the C-Series pumps will
help guide you in your selection of a C-Series pump and syringe.
Refer to the following table to help determine which syringe/pump will
meet your requirements. The table shows flow rate ranges for each of
the C-Series pumps, according to the size of the syringe in use.
The flow rate formula is simply total syringe volume divided by dispense
speed. For example, with a C3000/1000
µL
syringe combination at top
speed of 1.2 seconds/full stroke, the maximum flow rate is 833.33
µL
/
sec. (1000/1.2 = 833.33); and the minimum is 0.0208
µL
/sec (1000/
48000 = 0.0208).
In the minimum case, because the slowest rated speed for the C3000 is
stated in minutes, you need to multiply by 60 to get seconds (800 X 60
= 48000). Keep in mind that, as syringe volume goes up and pump
speed decreases, pulsation increases. Running smaller syringes at higher
speeds decreases pulsation.
Converting velocity to flow rate
To convert velocity in increments/sec to flow rate in volume/sec: Divide
the syringe volume by the velocity resolution, then multiply by the [V]
command setting, as shown by the following examples.
Table 9-6: C-Series flow rate guide
Syringe size
(
µ L
)
C3000/C3000MP C24000/C24000MP
Highest flow rate
@1.2 sec/full stroke
(
µ L per sec)
Lowest flow rate
@ 48000 sec/full stroke
(
µ L per second)
Highest flow rate
@ 4.2 sec/full stroke
(
µ L per second)
Lowest flow rate
@192000 sec/full stroke
(
µ L per second)
50 41.67 0.001042 11.90 0.0002604
100 83.33 0.002083 23.81 0.0005208
250 208.33 0.005208 59.52 0.0013021
500 416.67 0.010417 119.05 0.0026042
1000 833.33 0.020833 238.10 0.0052083
2500 2083.33 0.052083 595.24 0.0130208
5000 4166.67 0.104167 1190.48 0.0260417
12500 10416.67 0.260417 2976.19 0.0651042
Note:
• This guide is intended to provide a snapshot of potential flow rates and does not imply specific performance at
those rates.
• Higher flow rates may not be achievable due to flow rate restrictions in the fluid path.
• Extremely low flow rates may be accompanied by pulsation.