SKC DataTrac for the Pocket Pump - Manual (Page 10)

8
SKC Real Time Monitor Window
Flow Calibrate
The Flow Calibrate butt ons (Figure 6) allow calibration of the fl ow rate displayed on
the pump LCD to the fl ow rate displayed on a primary standard calibrator.
The Approx Correction (approximate correction) is the diff erence between the fl ow
rate displayed on the pump and the fl ow rate displayed on the calibrator. When
a pump is connected to a calibrator the fl ow rate is determined by the calibrator
display and not the pump display.
Adjusting the Flow Correction
To adjust the approximate correction rate, click and hold the sliding butt on, then
move the butt on to the left (decreases correction) to adjust fl ow when the calibrator
display is higher than the pump fl ow rate display or to the right (increases correction)
to adjust fl ow when the calibrator display is lower than the pump fl ow rate display.
The range of correction is ± 20 ml/min. An alternate method is to click the left and
right arrow butt ons to move the sliding butt on. The value changes as the butt on
slides left or right.
The pump should be calibrated before each sample run. Once calibrated, all volume displays will be accurate for that
fl ow rate. DataTrac will always display the last approximate correction value to which the connected pump has been
set. Changing the fl ow sett ing on the pump clears the correction value (sets it to 0.0).
When calibrating, the fl ow rate displayed on the calibrator changes; the fl ow rate displayed on the
pump LCD does not change.
Reset Button
To reset the correction value to 0.0 mL/min, click once on the Reset butt on.
Multiple Pumps Checkbox
Turn off Comm Checking before setting up multiple pumps.
See Comm Checking Buttons on page 15.
If you wish to perform fl ow calibration, reset volume temperature and time,
or change parameter display scales for multiple pumps, click the Multiple
Pumps checkbox in the Flow Calibrate section of the Real Time Monitor
window.
Once checked, a separate window will open (Figure 6A). Set parameters as
desired for one pump, disconnect the interface cable from the pump, and
insert the cable plug into the interface port on another Pocket Pump. Once
all pumps are set up, click the Multiple Pumps checkbox to deselect this
option. You will be returned to the Real Time Monitor window.
Using Flow Calibrate
Set the pump to the desired fl ow rate.
Connect the inlet port of the pump to a primary standard calibrator and read the fl ow on the calibrator display.
Set the approximate correction as needed by clicking and holding the sliding butt on and moving it left to decrease
correction or right to increase correction and recalibrate. The fl ow rate that is displayed on the calibrator should change
as result of this operation.
Example: The desired fl ow rate of the pump is 150 mL/min. Set the pump to 150 mL/min. If the calibrator reading is
157 mL/min, move the sliding butt on to the left to adjust the approximate correction to -7 mL/min and recalibrate. Repeat as
necessary until the fl ow rate displayed on the calibrator is within the required tolerance.
Figure 6. Flow Calibrate
Click here to increase
the pump fl ow rate.
Click here to decrease
the pump fl ow rate.
Figure 6A. Multiple Pumps Checkbox