KD Scientific Gemini 88 - Manual (Page 13)

11
KDS Gemini 88
Operation
DIAMETERS
The pump must be stopped when entering a diameter. Diameter 1 is the diameter of both
syringes, except in Proportional mode. In Proportional mode, enter the diameter of each
syringe separately; Diameter 1 for syringe 1 and Diameter 2 for syringe 2. When entering
a diameter, the 2 direction LEDs corresponding to the syringe and the “mm” LED will blink.
Enter the inside diameter of the syringe in millimeters. After a new diameter is entered the
corresponding rate is set to 0. This is done for reasons of safety. The maximum diameter is
50 mm. See Appendix A for a list of syringe diameters.
PUMPING RATES
Rate 1 is the rate of pumping of both syringes, except in Proportional mode. In Proportional
mode, enter the rate of each syringe separately, Rate 1 for syringe 1 and Rate 2 for syringe
2. When entering a rate, the directional LEDs corresponding to the syringe and the current
units LED will blink. Use the corresponding rate key (RATE 1 or RATE 2) to scroll through the
rate units: ml/min, ml/hr, µl/min and µl/hr. The minimum and maximum rates permitted
vary depending on the diameter of the syringe. If an “OOR” message, meaning “Out of
Range” is displayed when entering a rate, try using a different syringe for your application.
SELECTING THE RUN MODE
To select the run mode, press the SELECT MODE key to advance the run mode LED indicator.
Advance the run mode indicator to the desired mode, either Auto Stop, Proportional, or
Continuous mode.
Auto Stop Both syringes pump according to DIAMETER 1 and RATE 1
until syringe 1 reaches the limit switch, pump stops.
Proportional Each syringe pumps independently; syringe 1 according to
DIAMETER 1 and RATE 1, syringe 2 according to DIAMETER
2 and RATE 2. When syringe 1 reaches limit switch,
pump stops.
Continuous Both syringes pump according to DIAMETER 1 and RATE 1.
When syringe 1 reaches limit switch, the direction of pumping
for both syringes is reversed and pumping continues. The
valves, if applicable, are set accordingly.
Selecting the Pumping Directions
Parallel or Reci- Pressing the PARALLEL/ RECIPROCAL key reverses
procal Operation pumping direction of syringe 2.
Change Direction Pressing the CHANGE DIRECTION key reverses the pumping
directions of both syringes. When valves are used in the
system then the valve(s) setting(s) will be changed simultane-
ously with the change in direction.