Heidolph Pump Heads - Manual (Page 63)

I E I
63
-
Since every tube has its own tolerance, it will be required to calibrate the pump drive for a
particular tube, if high accuracy is mandatory.
Caution: with reference to the very small quantities involved, feed rate is displayed in
µl / min, when Cassette small and tube size 0.2; 0.5 or 0.9 are selected.
9.3.4. Calibrate feed rate
-
Enter ata and feed rate wanted, as described in chapter 10.2.3.
-
Hit "Cal" key (34). Display (41) flashes.
-
Hit "Start/ Stop" key (32).
-
The pump is going to run for 1 minute exactly. Collect fluid and determine quantity.
-
Enter value so determined with arrow keys (35).
-
Hold "Cal" key (34) depressed for not less than 3 seconds to save value. Data in memory
are revised. "Cal" is displayed (41) for about 2 seconds to confirm action.
-
Select actual feed rate wanted with arrow keys (35).
Caution: with reference to the very small quantities involved, feed rate is displayed in
when Cassette small and tube size 0.2; 0.5 or 0.9 are selected.
9.3.5. Metering by volume
There is a minimum allowable metering volume that depends upon the set speed and
the tube diameter. Lower values can only be achieved with smaller tubes. (see page
196)
The PD 5206 drive can only meter with a maximum of 300 l/min for reasons of
precision! During the metering process, the drive is automatically limited to 300 l/min.
The LED "Speed rpm" and the display blink before the metering process as an
indication.
-
The pump drive features metering of a certain volume of fluid. Once set, this quantity may be
fed no matter how often by just hitting the "Start/Stop" key (32) or by triggering the interface
(37/39). Max volume is 9999 ml.
-
To select a certain volume, you first need to enter tube ID.
-
Feed rate is proportional to the number of rotations and tube ID.
-
Enter tube ID: hit "Select" key (36) until "tube mm" is lit.
-
Enter actual tube ID with arrow keys (35) (e.g. 0.8; 1.7; 3.1; 4.8; 6.3 or 7.9).
If the LED "Vol ml" blinks when you adjust the internal diameter of the tube, the
metering volume is being adapted to the minimum allowable volume!
-
Hold "Select" key (36) depressed until LED "Vol ml" is lit.
Caution: with reference to the very small quantities involved, feed rate is displayed in
µl / min, when Cassette small and tube size 0.2; 0.5 or 0.9 are selected.
tube d
µl / min,
LED